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Acupuncture

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For the recording, see Acupuncture (album).
Acupuncture
Intervention
Acupuncture1-1.jpg
Needles being inserted into a person's skin
ICD-10-PCS 8E0H30Z
ICD-9: 99.91-99.92
MeSH D015670
OPS-301 code: 8-975.2

Acupuncture (from Latin, 'acus' (needle) + 'punctura' (to puncture)[1]) is a form of alternative medicine[2] and a key component of traditional Chinese medicine (TCM)[3] involving inserting thin needles into the body at acupuncture points.[4] It can be associated with the application of heat, pressure, or laser light to these same points.[4] Acupuncture is commonly used for pain relief,[5][6] though it is also used for a wide range of conditions.[3] Clinical practice varies depending on the country.[7] It is rarely used alone but rather as an adjunct to other forms of treatment.[8] TCM theory and practice are not based upon scientific knowledge,[9] and acupuncture is described as a type of pseudoscience.[10][11]

The conclusions of many trials and numerous systematic reviews of acupuncture are largely inconsistent.[12] Cochrane reviews found acupuncture is not effective for a wide range of conditions.[12] An overview of high-quality Cochrane reviews suggests that acupuncture may alleviate certain kinds of pain.[13] A systematic review of systematic reviews found that for reducing pain, real acupuncture was no better than sham acupuncture.[n 1][5] The evidence suggests that short-term treatment with acupuncture does not produce long-term benefits.[15] Some research results suggest acupuncture can alleviate pain, though other research consistently suggests that acupuncture's effects are mainly due to placebo.[7] A systematic review concluded that the analgesic effect of acupuncture seemed to lack clinical relevance and could not be clearly distinguished from bias.[16]

Acupuncture is generally safe when done by an appropriately trained practitioner using clean technique and single-use needles.[17][18] When properly delivered, it has a low rate of mostly minor adverse effects.[4][17] Between 2000 and 2009, at least ninety-five cases of serious adverse events, including five deaths, were reported to have resulted from acupuncture.[5] Since serious adverse events continue to be reported, it is recommended that acupuncturists be trained sufficiently to reduce the risk.[5] A meta-analysis found that acupuncture for chronic low back pain was cost-effective as an adjunct to standard care,[19] while a systematic review found insufficient evidence for the cost-effectiveness of acupuncture in the treatment of chronic low back pain.[20]

Scientific investigation has not found any histological or physiological evidence for traditional Chinese concepts such as qi, meridians, and acupuncture points.[n 2][24][25] Many modern practitioners no longer support these concepts[26][27] and have abandoned the concepts of qi and meridians.[28][29] Acupuncture is currently used widely throughout China and many other countries, including the United States.[17][30] It is uncertain exactly when acupuncture originated or how it evolved, but it is generally thought to derive from ancient China.[31] In the early 19th century, an interest arose both in the US and Europe.[7] Acupuncture is identified by Chinese people globally as part of their intangible cultural heritage.[32]

Clinical practice

One type of acupuncture needle

Acupuncture is a form of alternative medicine.[2] It is commonly used for pain relief,[5][6] though it is also used to treat a wide range of conditions.[3] The majority of people who seek out acupuncture do so for musculoskeletal problems, including lower back pain, shoulder stiffness, and knee pain.[33] Acupuncture is rarely used alone but rather as an adjunct to other treatment modalities.[8]

Acupuncture is the stimulation of specific acupuncture points along the skin of the body using thin needles.[4] It can be associated with the application of heat, pressure, or laser light to these points.[4] Classically, acupuncture is individualized and based on philosophy and intuition, and not on scientific research.[34] In modern acupuncture, a consultation is followed by taking the pulse on both arms and inspecting the tongue. This initial evaluation may last up to sixty minutes.[35] Subsequent visits typically last about a half an hour.[35] The number and frequency of acupuncture sessions vary, but most practitioners do not think one session is sufficient.[2] A common treatment plan for a single complaint usually involves six to twelve treatments, to be carried out over a few months.[35] A typical session entails lying still while approximately five to twenty needles are inserted; for the majority of cases, the needles will be left in place for ten to twenty minutes.[35] There is also a non-invasive therapy developed in early 20th century Japan using an elaborate set of "needles" for the treatment of children (shōnishin or shōnihari).[36][37]

Clinical practice varies depending on the country.[7][38] A comparison of the average number of patients treated per hour found significant differences between China (10) and the United States (1.2).[39] Acupuncturists generally practice acupuncture as an overall system of care, which includes using traditional diagnostic techniques, acupuncture needling, and other adjunctive treatments.[40] Chinese herbs are also often used.[40] There is a diverse range of acupuncture approaches, involving different philosophies.[27] Although various different techniques of acupuncture practice have emerged, the method used in traditional Chinese medicine (TCM) seems to be the most widely adopted in the US.[2] Traditional acupuncture involves needle insertion, moxibustion, and cupping therapy.[17] Traditional acupuncture may be accompanied by various ancillary procedures, such as palpation of the radial artery and other parts of the body and examining the tongue.[2] Traditional acupuncture is the belief that a "life force" (qi) circulates within the body in lines called meridians.[41] The main methods practiced in the UK are TCM and Western medical acupuncture.[42] The term Western medical acupuncture is used to indicate an adaptation of TCM-based acupuncture which focuses less on TCM.[41][43] Westerm medical acupuncture attempts to incorporate acupuncture with conventional evidence-based treatment, and largely distances itself from TCM's conceptual foundations such as qi and yin/yang.[41] Western medical acupuncturists tend to focus less on acupuncture points and specific placement for needles.[41]

Needles

Acupuncture needles
Traditional and modern Japanese guiding tube needles

Acupuncture needles are typically made of stainless steel, making them flexible and preventing them from rusting or breaking.[44] Needles are usually disposed of after each use to prevent contamination.[44] Reusable needles when used should be sterilized between applications.[44][45] Needles vary in length between 13 to 130 millimetres (0.51 to 5.12 in), with shorter needles used near the face and eyes, and longer needles in areas with thicker tissues; needle diameters vary from 0.16 mm (0.006 in) to 0.46 mm (0.018 in),[46] with thicker needles used on more robust patients. Thinner needles may be flexible and require tubes for insertion. The tip of the needle should not be made too sharp to prevent breakage, although blunt needles cause more pain.[47]

Apart from the usual filiform needle, other needle types include three-edged needles and the Nine Ancient Needles.[46] Japanese acupuncturists use extremely thin needles that are used superficially, sometimes without penetrating the skin, and surrounded by a guide tube (a 17th-century invention adopted in China and the West). Korean acupuncture uses copper needles and has a greater focus on the hand.[38]

Needling technique

Insertion

The skin is sterilized and the needles are inserted, frequently with a plastic guide tube. Needles may be manipulated in various ways, including spinning, flicking, or moving up and down relative to the skin. Since most pain is felt in the superficial layers of the skin, a quick insertion of the needle is recommended.[48] Often, the needles are stimulated by hand in order to cause a dull, localized, aching sensation that is called de qi, as well as "needle grasp," a tugging feeling felt by the acupuncturist and generated by a mechanical interaction between the needle and skin.[2] Acupuncture can be painful.[49] The skill level of the acupuncturist may influence how painful the needle insertion is, and a sufficiently skilled practitioner may be able to insert the needles without causing any pain.[48]

De-qi sensation

De-qi (Chinese: 得气; pinyin: dé qì; "arrival of qi") refers to a sensation of numbness, distension, or electrical tingling at the needling site which might radiate along the corresponding meridian. If de-qi can not be generated, then inaccurate location of the acupoint, improper depth of needle insertion, inadequate manual manipulation, or a very weak constitution of the patient can be considered, all of which are thought to decrease the likelihood of successful treatment. If the de-qi sensation doesn't immediately occur upon needle insertion, various manual manipulation techniques can be applied to promote it (such as "plucking", "shaking" or "trembling").[50]

Once de-qi is achieved, further techniques might be utilized which aim to "influence" the de-qi; for example, by certain manipulation the de-qi sensation allegedly can be conducted from the needling site towards more distant sites of the body. Other techniques aim at "tonifying" (Chinese: ; pinyin: ) or "sedating" (Chinese: ; pinyin: xiè) qi.[50] The former techniques are used in deficiency patterns, the latter in excess patterns.[50] De qi is more important in Chinese acupuncture, while Western and Japanese patients may not consider it a necessary part of the treatment.[38]

Related practices

Acupressure being applied to a hand. [51][not in citation given]
Japanese moxibustion
A woman receiving fire cupping in China. Traditional acupuncture is associated with needle insertion, moxibustion, and cupping.[17]
  • Acupressure, a non-invasive form of bodywork, uses physical pressure applied to acupressure points by the hand, elbow, or with various devices.[52]
  • Acupuncture is often accompanied by moxibustion, the burning of cone-shaped preparations of moxa (made from dried mugwort) on or near the skin, often but not always near or on an acupuncture point. Traditionally, acupuncture was used to treat acute conditions while moxibustion was used for chronic diseases. Moxibustion could be direct (the cone was placed directly on the skin and allowed to burn the skin producing a blister and eventually a scar), or indirect (either a cone of moxa was placed on a slice of garlic, ginger or other vegetable, or a cylinder of moxa was held above the skin, close enough to either warm or burn it).[53]
  • Cupping therapy is an ancient Chinese form of alternative medicine in which a local suction is created on the skin; practitioners believe this mobilizes blood flow in order to promote healing.[54]
  • Tui na is a TCM method of attempting to stimulate the flow of qi by various bare-handed techniques that do not involve needles.[55]
  • Electroacupuncture is a form of acupuncture in which acupuncture needles are attached to a device that generates continuous electric pulses (this has been described as "essentially transdermal electrical nerve stimulation [TENS] masquerading as acupuncture").[56]
  • Sonopuncture is a stimulation of the body similar to acupuncture using sound instead of needles.[57] This may be done using purpose-built transducers to direct a narrow ultrasound beam to a depth of 6–8 centimetres at acupuncture meridian points on the body.[58] Alternatively, tuning forks or other sound emitting devices are used.[59]
  • Acupuncture point injection is the injection of various substances (such as drugs, vitamins or herbal extracts) into acupoints.[60]
  • Auriculotherapy, commonly known as ear acupuncture, auricular acupuncture, or auriculoacupuncture, is considered to date back to ancient China which involves inserting needles to stimulate points on the outer ear.[61] The modern approach was developed in France during the early 1950s.[61] There is no scientific evidence that it can cure disease; the evidence of effectiveness is negligible.[61]
  • Scalp acupuncture, developed in Japan, is based on reflexological considerations regarding the scalp area. Hand acupuncture, developed in Korea, centers around assumed reflex zones of the hand. Medical acupuncture attempts to integrate reflexological concepts, the trigger point model, and anatomical insights (such as dermatome distribution) into acupuncture practice, and emphasizes a more formulaic approach to acupuncture point location.[62]
  • Cosmetic acupuncture is the use of acupuncture in an attempt to reduce wrinkles on the face.[63]
  • A 2006 review found for veterinary acupuncture that there is insufficient evidence to "recommend or reject acupuncture for any condition in domestic animals".[64] Rigorous evidence for complementary and alternative techniques is lacking in veterinary medicine but evidence has been growing.[65]

Effectiveness

Medical organization guidelines

The American College of Physicians weakly recommends the use of acupuncture only for patients that do not show improvement after being treated with other methods.[66]

The American College of Chest Physicians only suggests the use of acupuncture for nausea relief when used in conjunction with other treatments.[67]

The American College of Gastroenterology makes only a conditional recommendation of acupuncture due to the low level of evidence. The guideline states that acupuncture can be considered as an alternative therapy and may be associated with improved rates of gastric emptying and reduction of symptoms.[68]

The American Academy of Otolaryngology – Head and Neck Surgery reviewed the evidence for the use of acupuncture and found that the randomized trials were methodologically flawed. The guideline concluded with a statement suggesting that "Clinicians may offer acupuncture, or refer to a clinician who can offer acupuncture, for patients with allergic rhinitis who are interested in nonpharmacologic therapy."[69]

The American Society of Anesthesiologists found no literature meeting its highest evidence grade in support of acupuncture, and issued its guideline using information rated as grade "B2" (suggestive) and grade "C2" (equivocal) discussing acupuncture treatment. It recommends that acupuncture may be considered in the treatment of patients with nonspecific, noninflammatory low back pain only in conjunction with conventional therapy.[70]

The British Geriatrics Society only recommends considering acupuncture as an adjunct therapy in combination with medication, not as a standalone therapy.[71]

Sham acupuncture and research

It is difficult but not impossible to design rigorous research trials for acupuncture.[72][73] Due to acupuncture's invasive nature, one of the major challenges in efficacy research is in the design of an appropriate placebo control group.[74][75] For efficacy studies to determine whether acupuncture has specific effects, "sham" forms of acupuncture where the patient, practitioner, and analyst are blinded seem the most acceptable approach.[72] The under-performance of acupuncture in such trials may indicate that therapeutic effects are due entirely to non-specific effects, or that the sham treatments are not inert or systematic protocols yield less than optimal treatment.[76][77] A common form of sham acupuncture is inserting needles on meridians not related to the specific condition being studied, or in places not associated with meridians.[78]

A 2014 Nature Reviews Cancer review article found that "contrary to the claimed mechanism of redirecting the flow of qi through meridians, researchers usually find that it generally does not matter where the needles are inserted, how often (that is, no dose-response effect is observed), or even if needles are actually inserted. In other words, ‘sham’ or ‘placebo’ acupuncture generally produces the same effects as ‘real’ acupuncture and, in some cases, does better."[79] A 2013 meta-analysis found little evidence that the effectiveness of acupuncture on pain (compared to sham) was modified by the location of the needles, the number of needles used, the experience or technique of the practitioner, or by the circumstances of the sessions.[80] The same analysis also suggested that the number of needles and sessions is important, as greater numbers improved the outcomes of acupuncture compared to non-acupuncture controls.[80] The research seems to suggest that needles do not need to stimulate the traditionally specified acupuncture points or penetrate the skin to attain an anticipated effect (e.g. psychosocial factors).[2]

A response to "sham" acupuncture in osteoarthritis may be used in the elderly, but placebos have usually been regarded as deception and thus unethical.[81] However, some physicians and ethicists have suggested circumstances for applicable uses for placebos such as it might present a theoretical advantage of an inexpensive treatment without adverse reactions or interactions with drugs or other medications.[81] Many physicians in the UK appear to recommend alternative medicine, which raises ethical issues. As the evidence for most types of alternative medicine is far from strong such as acupuncture, the use of alternative medicine in regular healthcare can present an ethical question.[82]

Acupuncture is perceptibly used at academic medical centers despite little or no convincing scientific evidence for explicit effects for any condition that is discernible from placebo.[79] The evidence that the majority of CAM modalities, such as acupuncture, are little more than 'theatrical placebos' is so compelling that some proponents of acupuncture have essentially conceded this position by advocating the 'harnessing of placebo effects' or developing 'meaningful placebos'.[79]

Using the principles of evidence-based medicine to research acupuncture is controversial, and has produced different results.[74] The conclusions of many trials and numerous systematic reviews of acupuncture are largely inconsistent.[12] Some research results suggest acupuncture can alleviate pain but others consistently suggest that acupuncture's effects are mainly due to placebo.[7] The evidence suggests that any benefits of acupuncture are short-lasting.[15] There is insufficient evidence to support acupuncture compared to mainstream medical treatments.[83] Acupuncture is not better than mainstream treatment in the long term.[78]

It has been argued that the numerous sham controls used in acupuncture trials cannot all be described as "placebo" controls.[84]

Publication bias

Publication bias is cited as a concern in the reviews of randomized controlled trials (RCTs) of acupuncture.[56][85][86] A 1998 review of studies on acupuncture found that trials originating in China, Japan, Hong Kong and Taiwan were uniformly favourable to acupuncture, as were ten out of 11 studies conducted in Russia.[87] A 2011 assessment of the quality of RCTs on TCM, including acupuncture, concluded that the methodological quality of most such trials (including randomization, experimental control and blinding) was generally poor, particularly for trials published in Chinese journals (though the quality of acupuncture trials was better than the drug-related trials).[88] The study also found that trials published in non-Chinese journals tended to be of higher quality.[88] Chinese authors use more Chinese studies, which have been demonstrated to be uniformly positive.[89] A 2012 review of 88 systematic reviews of acupuncture published in Chinese journals found that less than half of these reviews reported testing for publication bias, and that the majority of these reviews were published in journals with impact factors of zero.[90]

Pain

A 2009 overview of Cochrane reviews found acupuncture is not effective for a wide range of conditions.[12] A 2011 overview of high-quality Cochrane reviews suggests that acupuncture is effective for certain types of pain.[13] A 2011 systematic review of systematic reviews which highlighted recent high-quality RCTs found that for reducing pain, real acupuncture was no better than sham acupuncture, and concluded that numerous reviews have shown little convincing evidence that acupuncture is an effective treatment for reducing pain.[5] The same review found that neck pain was one of only four types of pain for which a positive effect was suggested, but cautioned that the primary studies used carried a considerable risk of bias.[5]

A 2014 systematic review suggests that the nocebo effect of acupuncture is clinically relevant and that the rate of adverse events may be a gauge of the nocebo effect.[91] According to the 2014 Miller's Anesthesia book, "when compared with placebo, acupuncture treatment has proven efficacy for relieving pain".[92] A 2012 meta-analysis conducted by the Acupuncture Trialists' Collaboration found "relatively modest" efficiency of acupuncture (in comparison to sham) for the treatment of four different types of chronic pain, and on that basis concluded that it "is more than a placebo" and a reasonable referral option.[93] Commenting on this meta-analysis, both Edzard Ernst and David Colquhoun said the results were of negligible clinical significance.[94][95] Edzard Ernst later stated that "I fear that, once we manage to eliminate this bias [that operators are not blind] … we might find that the effects of acupuncture exclusively are a placebo response."[96] Andrew Vickers, lead author of the original 2012 paper and chair of the Acupuncture Trialists' Collaboration, rejects that analysis, stating that the differences between acupuncture and sham acupuncture are statistically significant.[96]

A 2010 systematic review suggested that acupuncture is more than a placebo for commonly occurring chronic pain conditions, but the authors acknowledged that it is still unknown if the overall benefit is clinically meaningful or cost-effective.[97] A 2010 review found real acupuncture and sham acupuncture produce similar improvements, which can only be accepted as evidence against the efficacy of acupuncture.[98] The same review found limited evidence that real acupuncture and sham acupuncture appear to produce biological differences despite similar effects.[98] A 2009 systematic review and meta-analysis found that acupuncture had a small analgesic effect, which appeared to lack any clinical importance and could not be discerned from bias.[16] The same review found that it remains unclear whether acupuncture reduces pain independent of a psychological impact of the needling ritual.[16]

Low back

A 2013 systematic review found supportive evidence that real acupuncture may be more effective than sham acupuncture with respect to relieving lower back pain, but there were methodological limitations with the studies.[99] A 2013 systematic review found that acupuncture may be effective for nonspecific lower back pain, but the authors noted there were limitations in the studies examined, such as heterogeneity in study characteristics and low methodological quality in many studies.[100] A 2012 systematic review found some supporting evidence that acupuncture was more effective than no treatment for chronic non-specific low back pain; the evidence was conflicting comparing the effectiveness over other treatment approaches.[8] A 2011 overview of Cochrane reviews found inconclusive evidence regarding acupuncture efficacy in treating low back pain.[13] A 2011 systematic review of systematic reviews found that "for chronic low back pain, individualized acupuncture is not better in reducing symptoms than formula acupuncture or sham acupuncture with a toothpick that does not penetrate the skin."[5] A 2013 meta-analysis found that acupuncture was better than no treatment for reducing lower back pain, but not better than sham acupuncture, and concluded that the effect of acupuncture "is likely to be produced by the nonspecific effects of manipulation".[101] A 2010 review found that sham acupuncture was as effective as real acupuncture for chronic low back pain.[2] The specific therapeutic effects of acupuncture were small, whereas its clinically relevant benefits were mostly due to contextual and psychosocial circumstances.[2] Brain imaging studies have shown that traditional acupuncture and sham acupuncture differ in their effect on limbic structures, while at the same time showed equivalent analgesic effects.[2] A 2005 Cochrane review found insufficient evidence to recommend for or against either acupuncture or dry needling for acute low back pain.[102] The same review found low quality evidence for pain relief and improvement compared to no treatment or sham therapy for chronic low back pain only in the short term immediately after treatment.[102] The same review also found that acupuncture is not more effective than conventional therapy and other alternative medicine treatments.[102]

Headaches and migraines

A 2012 review found that acupuncture has demonstrated benefit for the treatment of headaches, but that safety needed to be more fully documented in order to make any strong recommendations in support of its use.[103] A 2009 Cochrane review of the use of acupuncture for migraine prophylaxis treatment concluded that "true" acupuncture was no more efficient than sham acupuncture, but "true" acupuncture appeared to be as effective as, or possibly more effective than routine care in the treatment of migraines, with fewer adverse effects than prophylactic drug treatment.[104] The same review stated that the specific points chosen to needle may be of limited importance.[104] A 2009 Cochrane review found insufficient evidence to support acupuncture for tension-type headaches.[104] The same review found evidence that suggested that acupuncture might be considered a helpful non-pharmacological approach for frequent episodic or chronic tension-type headache.[104] A separate 2009 Cochrane review found that acupuncture could be useful in the prophylaxis of tension-type headaches.[105]

Osteoarthritis

As of 2014 a meta-analysis showed that acupuncture may help osteoarthritis pain but it was noted that the effects were insignificant in comparison to sham needles.[106] A 2013 systematic review and network meta-analysis found that the evidence suggests that acupuncture may be considered one of the more effective physical treatments for alleviating pain due to knee osteoarthritis in the short-term compared to other relevant physical treatments, though much of the evidence in the topic is of poor quality and there is uncertainty about the efficacy of many of the treatments.[107] A 2012 review found "the potential beneficial action of acupuncture on osteoarthritis pain does not appear to be clinically relevant."[78] A 2014 review concluded that "current evidence supports the use of acupuncture as an alternative to traditional analgesics in osteoarthritis patients."[108] A 2010 Cochrane review found that acupuncture shows statistically significant benefit over sham acupuncture in the treatment of peripheral joint osteoarthritis; however, these benefits were found to be so small that their clinical significance was doubtful, and "probably due at least partially to placebo effects from incomplete blinding".[109]

Extremity conditions

A 2007 review found that acupuncture was significantly better than sham acupuncture at treating chronic knee pain; the evidence was not conclusive due to the lack of large, high-quality trials.[110] A 2014 systematic review found moderate quality evidence that acupuncture was more effective than sham acupuncture in the treatment of lateral elbow pain.[111] A 2014 systematic review found that although manual acupuncture was effective at relieving short-term pain when used to treat tennis elbow, its long-term effect in relieving pain was "unremarkable".[112]

A 2011 overview of Cochrane reviews found inconclusive evidence regarding acupuncture efficacy in treating shoulder pain and lateral elbow pain.[13]

Nausea and vomiting and post-operative pain

A 2014 overview of systematic reviews found insufficient evidence to suggest that acupuncture is an effective treatment for postoperative nausea and vomiting (PONV) in a clinical setting.[113] A 2013 systematic review concluded that acupuncture might be beneficial in prevention and treatment of PONV.[114] A 2009 Cochrane review found that stimulation of the P6 acupoint on the wrist was as effective (or ineffective) as antiemetic drugs and was associated with minimal side effects.[113][115] The same review found "no reliable evidence for differences in risks of postoperative nausea or vomiting after P6 acupoint stimulation compared to antiemetic drugs."[115]

A 2014 overview of systematic reviews found insufficient evidence to suggest that acupuncture is effective for surgical or post-operative pain.[113] For the use of acupuncture for post-operative pain, there was contradictory evidence.[113] A 2014 systematic review found supportive but limited evidence for use of acupuncture for acute post-operative pain after back surgery.[116] A 2014 systematic review found that while the evidence suggested acupuncture could be an effective treatment for postoperative gastroparesis, a firm conclusion could not be reached because the trials examined were of low quality.[117]

Allergies

Acupuncture is an unproven treatment for allergic-immunologic conditions.[118] A 2015 meta-analysis suggests that acupuncture might be a good option for people with allergic rhinitis (AR),[119] and a number of randomized clinical trials (RCTs) support the use of acupuncture for AR and itch.[120] There is some evidence that acupuncture might have specific effects on perennial allergic rhinitis (PAR), though all of the efficacy studies were small and conclusions should be made with caution.[121] There is mixed evidence for the symptomatic treatment or prevention of AR.[122] For seasonal allergic rhinitis (SAR), the evidence failed to demonstrate specific effects for acupuncture.[122] Using acupuncture to treat other allergic conditions such as contact eczema, drug rashes, or anaphylaxis is not recommended.[120]

Cancer-related conditions

A 2012 systematic review of randomised clinical trials (RCTs) using acupuncture in the treatment of cancer pain found that the number and quality of RCTs was too low to draw definite conclusions.[123] A 2011 Cochrane review found that there is insufficient evidence to determine whether acupuncture is an effective treatment for cancer pain in adults.[124] A 2014 systematic review found that acupuncture may be effective as an adjunctive treatment to palliative care for cancer patients.[125] A 2013 overview of reviews found evidence that acupuncture could be beneficial for people with cancer-related symptoms, but also identified few rigorous trials and high heterogeneity between trials.[126]

A 2013 systematic review found that acupuncture is an acceptable adjunctive treatment for chemotherapy-induced nausea and vomiting, but that further research with a low risk of bias is needed.[127] A 2013 systematic review found that the quantity and quality of available RCTs for analysis were too low to draw valid conclusions for the effectiveness of acupuncture for cancer-related fatigue.[128] A 2014 systematic review reached inconclusive results with regard to the effectiveness of acupuncture for treating cancer-related fatigue.[129] A 2012 systematic review and meta-analysis found very limited evidence regarding the effectiveness of acupuncture compared with conventional intramuscular injections for the treatment of hiccups in cancer patients.[130] The methodological quality and amount of RCTs in the review was low.[130] A 2013 meta-analysis found that acupuncture plus education was superior to usual care for the treatment of cancer-related fatigue, but that it was not certain whether this was due to the acupuncture or the education.[131] The same meta-analysis found that three other comparisons were not statistically significantly in favor of acupuncture.[131]

Fertility and childbirth

A 2014 systematic review and meta-analysis found poor quality evidence for use of acupuncture in infertile men to improve sperm motility, sperm concentration, and the pregnancy rate; the evidence was rated as insufficient to draw any conclusion regarding efficacy.[132] A 2013 Cochrane review found no evidence of acupuncture for improving the success of in vitro fertilization (IVF).[133] A 2013 systematic review found no benefit of adjuvant acupuncture for IVF on pregnancy success rates.[134] A 2012 systematic review found that acupuncture may be a useful adjunct to IVF,[135] but its conclusions were rebutted after reevaluation using more rigorous, high quality meta-analysis standards.[136] A 2011 overview of systematic reviews found that the evidence that acupuncture was effective was not compelling for most gynecologic conditions. The exceptions to this conclusion included the use of acupuncture during embryo transfer as an adjunct to in vitro fertilization.[137] A 2012 systematic review and meta-analysis found that acupuncture did not significantly improve the outcomes of in vitro fertilization.[138]

Rheumatological conditions

A 2013 Cochrane review found low to moderate evidence that acupuncture improves pain and stiffness in treating people with fibromyalgia compared with no treatment and standard care.[139] A 2012 review found "there is insufficient evidence to recommend acupuncture for the treatment of fibromyalgia."[78] A 2010 systematic review found a small pain relief effect that was not apparently discernible from bias; acupuncture is not a recommendable treatment for the management of fibromyalgia on the basis of this review.[140]

A 2012 review found that the effectiveness of acupuncture to treat rheumatoid arthritis is "sparse and inconclusive."[78] A 2005 Cochrane review concluded that acupuncture use to treat rheumatoid arthritis "has no effect on ESR, CRP, pain, patient's global assessment, number of swollen joints, number of tender joints, general health, disease activity and reduction of analgesics."[141] A 2010 overview of systematic reviews found insufficient evidence to recommend acupuncture in the treatment of most rheumatic conditions, with the exceptions of osteoarthritis, low back pain, and lateral elbow pain.[142]

Stroke

A 2014 overview of systematic reviews and meta-analyses found that the evidence does not demonstrate acupuncture helps reduce the rates of death or disability after a stroke or improve other aspects of stroke recovery, such as poststroke motor dysfunction, but the evidence suggests it may help with poststroke neurological impairment and dysfunction such as dysphagia, which would need to be confirmed with future rigorous studies.[143] A 2012 review found evidence of benefit for acupuncture combined with exercise in treating shoulder pain after stroke.[144] A 2010 systematic review found that acupuncture was not effective as a treatment for functional recovery after a stroke.[145] A 2008 Cochrane review found that evidence was insufficient to draw any conclusion about the effect of acupuncture on dysphagia after acute stroke.[146] A 2006 Cochrane review found no clear evidence for acupuncture on subacute or chronic stroke.[147] A 2005 Cochrane review found no clear evidence of benefit for acupuncture on acute stroke.[148] A 2014 meta-analysis found tentative evidence for acupuncture in cerebral infarction, a type of ischemic stroke, but the authors noted the trials reviewed were often of poor quality.[149] Another 2014 meta-analysis found that the effectiveness of acupuncture for treating spasticity after a stroke was uncertain as the studies available were of poor quality.[150] A 2015 systematic review and meta-analysis found that acupuncture could be effective to treat spasticity after stroke, but called for more studies to be conducted to determine how long its effects lasted.[151]

Irritable bowel syndrome

Many US clinical trials on the use of acupuncture for irritable bowel syndrome (IBS) have found that it had no additional benefit over fake acupuncture treatments administered to a control group. Symptoms improved substantially for people receiving actual acupuncture and fake treatments, which is believed to result from the placebo effect.[152][153] Many trials in China have found acupuncture to be more effective than pharmaceuticals and analyses conducted in China of the medical literature find it to be effective.[154][155] This may be caused by an increased preference for acupuncture increasing the placebo effect, which was not taken into account with control groups.[153][155]

Other conditions

For the following conditions, the Cochrane Collaboration or other reviews have concluded there is no strong evidence of benefit: alcohol dependence,[156] angina pectoris,[157] ankle sprain,[158][159] attention deficit hyperactivity disorder,[160][161] autism,[162][163] asthma,[164][165] bell's palsy,[166] traumatic brain injury,[167] carpal tunnel syndrome,[168] chronic obstructive pulmonary disease,[169] cardiac arrhythmias,[170] cerebral hemorrhage,[171] cocaine dependence,[172] constipation,[173] depression,[174][175] diabetic peripheral neuropathy,[176] drug detoxification,[177][178] dry eye,[179] primary dysmenorrhoea,[180] dyspepsia,[181] enuresis,[182] endometriosis,[183] epilepsy,[184] erectile dysfunction,[185] essential hypertension,[186] glaucoma,[187] gynaecological conditions (except possibly fertility and nausea/vomiting),[188] hot flashes,[189][190][191] hypoxic ischemic encephalopathy in neonates,[192] insomnia,[193][194] induction of childbirth,[195] labor pain,[196][197] lumbar spinal stenosis,[198] major depressive disorders in pregnant women,[199] myopia,[200] obesity,[201][202] obstetrical conditions,[203] Parkinson's disease,[204][205] polycystic ovary syndrome,[206] premenstrual syndrome,[207] preoperative anxiety,[208] psychological symptoms associated with opioid addiction,[209] restless legs syndrome,[210] schizophrenia,[211] sensorineural hearing loss,[212] smoking cessation,[213] stress urinary incontinence,[214] acute stroke,[215] stroke rehabilitation,[216] temporomandibular joint dysfunction,[217][218] tennis elbow,[219] labor induction,[220] tinnitus,[221][222] uremic itching,[223] uterine fibroids,[224] vascular dementia,[225] and whiplash.[226]

Moxibustion and cupping

A 2010 overview of systematic reviews found that moxibustion was effective for several conditions but the primary studies were of poor quality, so there persists ample uncertainty, which limits the conclusiveness of their findings.[227] A 2012 systematic review suggested that cupping therapy seems to be effective for herpes zoster and various other conditions but due to the high risk of publication bias, larger studies are needed to draw definitive conclusions.[228]

Safety

Adverse events

Acupuncture is generally safe when administered by an experienced, appropriately trained practitioner using clean technique and sterile single-use needles.[17][18] When not delivered properly by a qualified practitioner it can cause potentially serious adverse effects.[18] To reduce the risk of serious adverse events after acupuncture, acupuncturists should be trained sufficiently.[5] People with serious spinal disease, such as cancer or infection, are not good candidates for acupuncture.[2] Contraindications to acupuncture are conditions that should not be treated with acupuncture; these contraindications include coagulopathy disorders (e.g. haemophilia and advanced liver disease), warfarin use, severe psychiatric disorders (e.g. psychosis), and skin infections or skin trauma (e.g. burns).[2] Further, electroacupuncture should be avoided at the spot of implanted electrical devices (e.g. pacemakers).[2]

A 2011 systematic review of systematic reviews (internationally and without language restrictions) found that serious complications following acupuncture continue to be reported.[5] Between 2000 and 2009, ninety-five cases of serious adverse events, including five deaths, were reported.[5] Many such events are not inherent to acupuncture but are due to malpractice of acupuncturists.[5] This might be why such complications have not been reported in surveys of adequately-trained acupuncturists.[5] Most such reports are from Asia, which may reflect the large number of treatments performed there or it might be because there are a relatively higher number of poorly trained Asian acupuncturists.[5] Many serious adverse events were reported from developed countries.[5] This included Australia, Austria, Canada, Croatia, France, Germany, Holland, Ireland, New Zealand, Spain, Sweden, Switzerland, the UK, and the US.[5] The number of adverse effects reported from the UK appears particularly unusual, which may indicate less under-reporting in the UK than other countries.[5] 38 cases of infections were reported and 42 cases of organ trauma were reported.[5] The most frequent adverse events included pneumothorax, and bacterial and viral infections.[5]

A 2013 review found (without restrictions regarding publication date, study type or language) 295 cases of infections; mycobacterium was the pathogen in at least 96%.[229] Likely sources of infection include towels, hot packs or boiling tank water, and reusing reprocessed needles.[229] Possible sources of infection include contaminated needles, reusing personal needles, a person's skin contained mycobacterium and reusing needles at various sites in the same person.[229] Although acupuncture is generally considered a safe procedure, in the last decade reports of infection transmission have increased significantly, including those of mycobacterium.[229] Although it is recommended that practitioners of acupuncture use disposable needles, the reuse of sterilized needles is still permitted.[229] It is also recommended that thorough control practices for preventing infection be implemented and adapted.[229]

English-language

A 2013 systematic review of the English-language case reports found that serious adverse events associated with acupuncture are rare, but acupuncture is not without risk.[17] Between 2000 and 2011, there were 294 adverse events reported in the English-language literature from 25 countries and regions.[17] The majority of the reported adverse events were relatively minor, and the incidences were low.[17] For example, a prospective survey of 34,000 acupuncture treatments found no serious adverse events and 43 minor ones, a rate of 1.3 per 1000 interventions.[17] Another survey found there were 7.1% minor adverse events, of which 5 were serious, amid 97,733 acupuncture patients.[17] The most common adverse effect observed was infection (e.g. mycobacterium), and the majority of infections were bacterial in nature, caused by skin contact at the needling site.[17] Infection has also resulted from skin contact with unsterilized equipment or dirty towels, in an unhygienic clinical setting.[17] Other adverse complications included five reported cases of spinal cord injuries (e.g. migrating broken needles or needling too deeply), four brain injuries, four peripheral nerve injuries, five heart injuries, seven other organ and tissue injuries, bilateral hand edema, epithelioid granuloma, pseudolymphoma, argyria, pustules, pancytopenia, and scarring due to hot needle technique.[17] Adverse reactions from acupuncture, which are unusual and uncommon in typical acupuncture practice, were syncope, galactorrhoea, bilateral nystagmus, pyoderma gangrenosum, hepatotoxicity, eruptive lichen planus, and spontaneous needle migration.[17]

A 2013 systematic review found 31 cases of vascular injuries were caused by acupuncture, 3 resulting in death.[230] Two died from pericardial tamponade and one was from an aortoduodenal fistula.[230] The same review found vascular injuries were rare, bleeding and pseudoaneurysm were most prevalent.[230] A 2011 systematic review (without restriction in time or language), aiming to summarize all reported case of cardiac tamponade after acupuncture, found 26 cases resulting in 14 deaths, with little doubt about causality in most fatal instances.[231] The same review concluded cardiac tamponade was a serious, usually fatal, though theoretically avoidable complication following acupuncture, and urged training to minimize risk.[231]

A 2012 review found a number of adverse events were reported after acupuncture in the UK's National Health Service (NHS) but most (95%) were not severe.[42] Though, miscategorization and under-reporting may alter the total figures.[42] From January 2009 to December 2011, there were 468 safety incidents recognized within the NHS organizations.[42] The adverse events recorded included retained needles (31%), dizziness (30%), loss of consciousness/unresponsive (19%), falls (4%), bruising or soreness at needle site (2%), pneumothorax (1%) and other adverse side effects (12%).[42] Acupuncture practitioners should know, and be prepared to be responsible for, any substantial harm from treatments.[42] Some acupuncture proponents argue that because of its long history this suggests it is safe.[42] However, there is an increasing literature on adverse events (e.g. spinal cord injury).[42]

Acupuncture seems to be safe in people getting anticoagulants, assuming needles are used at the correct location and depth.[232] Studies are required to verify these findings.[232] The evidence suggests that acupuncture might be a safe option for people with allergic rhinitis.[119]

Chinese, South Korean, and Japanese-language

A 2010 systematic review of the Chinese-language literature found numerous acupuncture-related adverse events including pneumothorax, fainting, subarachnoid hemorrhage, and infection as the most frequent, and cardiovascular injuries, subarachnoid hemorrhage, pneumothorax, and recurrent cerebral hemorrhage as the most serious, most of which were due to improper technique.[30] Between 1980 and 2009, the Chinese-language literature reported 479 adverse events.[30] Prospective surveys shown that mild, transient acupuncture-associated adverse events ranged from 6.71% to 15%.[30] A study with 190,924 patients, the prevalence of serious adverse events was roughly 0.024%.[30] Another study shown a rate of adverse events requiring specific treatment was 2.2%, 4,963 incidences were among 229,230 patients.[30] Infections, mainly hepatitis, after acupuncture are reported often in the English-language research, though it is rarely reported in the Chinese-language research, making it plausible that in China acupuncture-associated infections have been underreported.[30] Infections were mostly caused by poor sterilization of acupuncture needles.[30] Other adverse events included spinal epidural haematoma (in the cervical, thoracic and lumbar spine), chylothorax, injuries of abdominal organs and tissues, injuries in the neck region, injuries to the eyes, including orbital hemorrhage, traumatic cataract, injury of the oculomotor nerve and retinal puncture, hemorrhage to the cheeks and the hypoglottis, peripheral motor nerve injuries and subsequent motor dysfunction, local allergic reactions to metal needles, stroke, and cerebral hemorrhage after acupuncture.[30]

A causal link between acupuncture and the adverse events cardiac arrest, pyknolepsy, shock, fever, cough, thirst, aphonia, leg numbness, and sexual dysfunction remains uncertain.[30] The same review concluded that acupuncture can be considered inherently safe when practiced by properly trained practitioners, but the review also stated there is a need to find effective strategies to minimize the health risks.[30] Between 1999 and 2010, the Republic of Korean-literature contained reports of 1104 adverse events.[233] Between the 1980s and 2002, the Japanese-language literature contained reports of 150 adverse events.[234]

Children and pregnancy

When used on children, acupuncture is safe when administered by well-trained, licensed practitioners using sterile needles; however, a 2011 review found there was limited research to draw definite conclusions about the overall safety of pediatric acupuncture.[4] The same review found 279 adverse events, of which 25 were serious.[4] The adverse events were mostly mild in nature (e.g. bruising or bleeding).[4] The prevalence of mild adverse events ranged from 10.1% to 13.5%, an estimated 168 incidences were among 1,422 patients.[4] On rare occasions adverse events were serious (e.g. cardiac rupture or hemoptysis), many might have been a result of substandard practice.[4] The incidence of serious adverse events was 5 per one million, which included children and adults.[4] When used during pregnancy, the majority of adverse events caused by acupuncture were mild and transient, with few serious adverse events.[235] The most frequent mild adverse event was needling or unspecified pain, followed by bleeding.[235] Although two deaths (one stillbirth and one neonatal death) were reported, there was a lack of acupuncture associated maternal mortality.[235] Limiting the evidence as certain, probable or possible in the causality evaluation, the estimated incidence of adverse events following acupuncture in pregnant women was 131 per 10,000.[235] Although acupuncture is not contraindicated in pregnant women, some specific acupuncture points that are particularly sensitive to needle insertion; these spots, as well as the abdominal region, should be avoided during pregnancy.[2]

Moxibustion and cupping

Four adverse events associated with moxibustion were bruising, burns and cellulitis, spinal epidural abscess, and large superficial basal cell carcinoma.[17] Ten adverse events were associated with cupping.[17] The minor ones were keloid scarring, burns, and bullae;[17] the serious ones were acquired hemophilia A, stroke following cupping on the back and neck, factitious panniculitis, reversible cardiac hypertrophy, and iron deficiency anemia.[17]

Cost-effectiveness

A 2013 meta-analysis found that acupuncture for chronic low back pain was cost-effective as a complement to standard care, but not as a substitute for standard care except in cases where comorbid depression presented.[19] The same meta-analysis found there was no difference between sham and non-sham acupuncture.[19] A 2011 systematic review found insufficient evidence for the cost-effectiveness of acupuncture in the treatment of chronic low back pain.[20] A 2010 systematic review found that the cost-effectiveness of acupuncture could not be concluded.[97] A 2012 review found that acupuncture seems to be cost-effective for some pain conditions.[236]

Risk of forgoing conventional medical care

As with other alternative medicines, unethical or naïve practitioners may induce patients to exhaust financial resources by pursuing ineffective treatment.[9][237] Profession ethical codes set by accrediting organizations such as the National Certification Commission for Acupuncture and Oriental Medicine require practitioners to make "timely referrals to other health care professionals as may be appropriate."[238] Stephen Barrett states that there is a "risk that an acupuncturist whose approach to diagnosis is not based on scientific concepts will fail to diagnose a dangerous condition".[239]

Conceptual basis

Acupuncture
Simplified Chinese 针刺

Acupuncture, a type of pseudoscience that enjoys some popularity in contemporary society,[10][11] is a key component of traditional Chinese medicine (TCM),[3] a medical system which a Nature editorial described as "fraught with pseudoscience", with the majority of its treatments having no logical mechanism of action.[240] Many within the scientific community consider it to be quackery and pseudoscience.[241] Massimo Pigliucci and Maarten Boudry describe it as a "borderlands science" lying between normal science and pseudoscience.[242] Acupuncture has notions of a superstitious pre-scientific culture, similar to European humoral theory.[243] According to TCM, the general theory of acupuncture is based on the premise that bodily functions are regulated by an energy called qi (氣) that flows through the body; disruptions of this flow are believed to be responsible for disease.[9] Health is viewed by traditional acupuncturists as a balance of yin and yang, sometimes equated to the sympathetic and parasympathetic nervous systems.[7][244] Acupuncture describes a family of procedures aiming to correct imbalances in the flow of qi by stimulation of anatomical locations on or under the skin (usually called acupuncture points or acupoints), by a variety of techniques.[9] The most common mechanism of stimulation of acupuncture points employs penetration of the skin by thin metal needles, which are manipulated manually or the needle may be further stimulated by electrical stimulation (electroacupuncture).[2]

Qi, meridians and acupuncture points

Traditional Chinese medicine (TCM) distinguishes several different kinds of qi.[245] In a general sense, qi is something that is defined by five "cardinal functions":[245][246]

Old Chinese medical chart of acupuncture meridians

Actuation (推動, tuīdòng) is of all physical processes in the body, especially the circulation of all body fluids such as blood in their vessels.[246] This includes actuation of the functions of the zang-fu organs and meridians.[246] Warming (溫煦, pinyin: wēnxù) the body, especially the limbs.[246] Defense (防御, pinyin: fángyù) against Exogenous Pathogenic Factors[246] Containment (固攝, pinyin: gùshè) of body fluids, i.e. keeping blood, sweat, urine, semen etc. from leakage or excessive emission.[246] Transformation (氣化, pinyin: qìhuà) of food, drink, and breath into qi, xue (blood), and jinye ("fluids"), and/or transformation of all of the latter into each other.[246]

To fulfill its functions, qi has to steadily flow from the inside of the body (where the zang-fu organs are located) to the "superficial" body tissues of the skin, muscles, tendons, bones, and joints.[247] It is assisted in its flow by "channels" referred to as meridians.[247] TCM identifies 12 "regular" and 8 "extraordinary" meridians; the Chinese terms being 十二经脉 (pinyin: shí-èr jīngmài, lit. "the Twelve Vessels") and 奇经八脉 (pinyin: qí jīng bā mài).[247] There's also a number of less customary channels branching off from the "regular" meridians.[248] Contemporary research has not supported the existence of qi or meridians.[24][25][26][249] The meridians are believed to connect to the bodily organs, of which those considered hollow organs (such as the stomach and intestines) were also considered yang while those considered solid (such as the liver and lungs) were considered yin. They were also symbolically linked to the rivers found in ancient China, such as the Yangtze, Wei and Yellow Rivers.[250]

Acupuncture points are mainly (but not always) found at specified locations along the meridians.[251] There also is a number of acupuncture points with specified locations outside of the meridians; these are called extraordinary points and are credited to treat certain diseases.[251] A third category of acupuncture points called "A-shi" points have no fixed location but represent tender or reflexive points appearing in the course of pain syndromes.[251] The actual number of points have varied considerably over time, initially they were considered to number 365, symbolically aligning with the number of days in the year (and in Han times, the number of bones thought to be in the body).[252] The Nei ching mentioned only 160 and a further 135 could be deduced giving a total of 295.[252] The modern total was once considered 670 but subsequently expanded due to more recent interest in auricular (ear) acupuncture and the treatment of further conditions.[252] In addition, it is considered likely that some points used historically have since ceased being used.[252] Limited research has compared the contrasting acupuncture systems used in various countries for determining different acupuncture points.[92] Thus, there is no definitive acupuncture points.[92]

TCM concept of disease

In TCM, disease is generally perceived as a disharmony or imbalance in the functions or interactions of such concepts as yin, yang, qi, xuĕ, zàng-fǔ, meridians, and of the interaction between the body and the environment.[253] Therapy is based on which "pattern of disharmony" can be identified.[254][255] In the case of the meridians, typical disease patterns are invasions with wind, cold, and damp Excesses.[256] In order to determine which pattern is at hand, practitioners will examine things like the color and shape of the tongue, the relative strength of pulse-points, the smell of the breath, the quality of breathing, or the sound of the voice.[257][258] TCM and its concept of disease do not strongly differentiate between cause and effect.[259] In theory, however, endogenous, exogenous and miscellaneous causes of disease are recognized.[260]

Traditional diagnosis

The acupuncturist decides which points to treat by observing and questioning the patient to make a diagnosis according to the tradition used. In TCM, the four diagnostic methods are: inspection, ausculation and olfaction, inquiring, and palpation. Inspection focuses on the face and particularly on the tongue, including analysis of the tongue size, shape, tension, color and coating, and the absence or presence of teeth marks around the edge.[261] Auscultation and olfaction is listening for particular sounds (such as wheezing) and attending to body odor.[261] Inquiring is focusing on the "seven inquiries": chills and fever; perspiration; appetite, thirst and taste; defecation and urination; pain; sleep; and menses and leukorrhea.[261] Palpation is focusing on feeling the body for tender A-shi points and feeling the left and right radial pulses.[261] There is significant heterogeneity among acupuncturists considering appropriate treatment protocols.[76]

Examination of the tongue and the pulse are among the principal diagnostic methods in TCM. Certain sectors of the tongue's surface are believed to correspond to the zàng-fŭ. For example, teeth marks on one part of the tongue might indicate a problem with the heart, while teeth marks on another part of the tongue might indicate a problem with the liver.[257] Training on the use of TCM pulse diagnosis can take several years.[262]

Scientific view

Modern acupuncture model

Some modern practitioners have embraced the use of acupuncture to treat pain, but have abandoned the use of qi, meridians, yin and yang as explanatory frameworks.[26][27] Some practitioners no longer consider the idea of an energy flow to apply.[28] They, along with acupuncture researchers, attribute the analgesic effects of acupuncture to the release of endorphins, and recognize the lack of evidence that it can affect the course of any disease.[28][29] A 2014 review stated that despite ample controversy encircling the validity of acupuncture as a modality, developing literature on its physiological effects in animals and humans is giving new views into the basic mechanisms for acupuncture needling.[263] The same review proposed a model combining both connective tissue plasticity and peripheral sensory modulation as a needle response for acupuncture's physiological effects.[263]

It is a generally held belief within the acupuncture community that acupuncture points and meridians structures are special conduits for electrical signals but no research has established any consistent anatomical structure or function for either acupuncture points or meridians.[n 2][25] The electrical resistance of acupuncture points and meridians have also been studied, with conflicting results.[25] There has been little systematic investigation of which components of an acupuncture session may be important for any therapeutic effect, including needle placement and depth, type and intensity of stimulation, and number of needles used.[76]

Quackwatch states that "TCM theory and practice are not based upon the body of knowledge related to health, disease, and health care that has been widely accepted by the scientific community. TCM practitioners disagree among themselves about how to diagnose patients and which treatments should go with which diagnoses. Even if they could agree, the TCM theories are so nebulous that no amount of scientific study will enable TCM to offer rational care."[9]

Acupuncture analgesia

Evidence indicates that acupuncture-induced pain relief effect, known as acupuncture analgesia, has physiological, anatomical and neurochemical origins.[264] The mechanism of action for acupuncture is still unclear.[265] Evidence suggests that acupuncture generates a sequence of events that include the release of endogenous opioid-like substances that modulate pain signals within the central nervous system,[265] and that it is possible to inhibit acupuncture's analgesic effects with the opioid antagonist naloxone.[266] Mechanical deformation of the skin by acupuncture needles appears to result in the release of adenosine.[2] The anti-nociceptive effect of acupuncture may be mediated by the adenosine A1 receptor.[267] A 2014 Nature Reviews Cancer review article found that the key mouse studies that suggested acupuncture relieves pain via the local release of adenosine, which then triggered close-by A1 receptors "caused more tissue damage and inflammation relative to the size of the animal in mice than in humans, such studies unnecessarily muddled a finding that local inflammation can result in the local release of adenosine with analgesic effect."[79] The use of qi as an explanatory framework has been decreasing in China, even as it becomes more prominent during discussions of acupuncture in the United States.[29] Despite the scientific evidence against such mystical explanations, academic discussions of acupuncture still make reference to pseudoscientific concepts like qi and meridians, in practice making many scholarly efforts to integrate evidence for efficacy and discussions of the mechanism impossible.[29] Qi, yin, yang and meridians have no counterpart in modern studies of chemistry, biology, physics, or human physiology and to date scientists have been unable to find evidence that supports their existence.[n 2][25]

Mechanisms in other conditions

It has been proposed that acupuncture's effects in gastrointestinal disorders may relate to its effects on the parasympathetic and sympathetic nervous system, which have been said to be the "Western medicine" equivalent of "yin and yang".[268] Acupuncture has also been found to exert anti-inflammatory effects, which may be mediated by the activation of the vagus nerve and deactivation of inflammatory macrophages.[269] Neuroimaging studies show that acupuncture stimulation results in deactivation of the limbic brain areas and the default mode network.[270] The modulatory effects of acupuncture may be related to its ability to suppress a range of proinflammatory cytokines such as tumor necrosis factor alpha, IL1B, interleukin 6, and interleukin 10.[271] Acupuncture may improve cognitive function by modulating signaling pathways that regulate neuronal survival and function.[272]

History

Origins

Acupuncture chart from the Ming Dynasty (c. 1368–1644)

Most historians believe acupuncture was founded in China, though there are some conflicting narratives on its origins.[31] Sharpened stones known as Bian shi have been found in China that suggest the practice may date to the Neolithic era. However, these tools may have been used for other medical purposes, such as puncturing and draining pussy growths.[31] The Mawangdui texts, which are believed to be from the 2nd century BC, mention the use of pointed stones to open abscesses, and moxibustion, but not for acupuncture.[273] Hieroglyphs and pictographs dated to be from the Shang Dynasty (16001100 BCE) have been found that suggests acupuncture may have been practiced along with moxibustion, by this time.[274]

The 5,000-year-old mummified body of Ötzi the Iceman was found with 15 groups of tattoos, some of which are located on what are considered acupuncture points.[275] This has been cited as evidence that practices similar to acupuncture may have been practiced elsewhere in Eurasia during the early Bronze Age.[275] According to historians David Ramey and Paul Buell, claims that acupuncture began prior to the mid 2000s BC are "suspect".[276] An article in the Oxford Journal Rheumatology said that the absence of any mention of acupuncture in documents found in the tomb of Ma-Wang-Dui from 198 BC suggest that acupuncture was not yet practiced.[31] Physician Plinio Prioreschi said earlier evidence is referring to acupuncture precursors, such as bloodletting, which was believed to release "bad blood" and allow the flow of ch'i energy.[273]

Ramey and Buell said the exact date acupuncture was founded depends on the extent that the dating of ancient texts can be trusted and the interpretation of what constitutes acupuncture.[276] Gold and silver needles found in the tomb of Liu Sheng from the 100s BC are believed to be the earliest archeological evidence of acupuncture, though it is still not known for sure if that was their purpose.[276] Texts dated to be from 156-186 BC document the belief in "imaginary channels" of life force energy called meridians that were an element in early acupuncture beliefs, but do not mention the use of needles.[276] According to Prioreschi, the earliest known historical record of acupuncture is the Shih-Chi ("Record of History"), written by a historian around 100 BC.[273]

According to the article in Rheumatology, the first documentation of an "organized system of diagnosis and treatment" of acupuncture was in The Yellow Emporer's Classic of Internal Medicine from about 100 BC.[31] It is believed that this text was documenting what was already established practice by this time.[31] Ramey and Buell said the "practice and theoretical underpinnings" of acupuncture weren't introduced until the text Huang Di Neijing, modified versions of which have been found from the 5th, 8th or 11th century AD.[273][276] It introduced the concepts of manipulating the flow of life energy (qi) in a network in the body. The book also makes references to the practice of bloodletting and it is speculated that acupuncture may have emerged from this practice.[276][277] At the time, there were no specificity on where to place the needles.[276] By the 2nd century BCE, acupuncture replaced moxibustion as the primary treatment for systematic conditions.[273]

Establishment

Several different and sometimes conflicting belief systems emerged regarding acupuncture. This may have been the result of competing schools of thought.[31] Some ancient texts referred to using acupuncture to cause bleeding, while others mixed the ideas of blood-letting and spiritual ch'i energy. Over time, the focus shifted from blood to the concept of puncturing specific points on the body, then eventually to balancing Yin and Yang energies.[273] According to Dr. David Ramey, current theories on the history of acupuncture suggest no single "method or theory" was ever predominantly adopted as the standard.[278] Some concepts like the idea of a spiritual life energy called Qi and conduits in the body called meridians were developed before the concept of needling in specific places.[31] Bronze statutes from the 1500s show that the concept of acupuncture points were developed by this time.[31] According to an article in Rheumatology, most of the modern day acupuncture practices were established by time The Great Compendium of Acupuncture and Moxibustion was published during the Ming Dynasty. It included a diagram of 365 points on the body believed to be channels to the body's life energy, whereby needles could open up the flow of energy.[31] At the time, scientific knowledge of medicine was not yet developed, especially because in China dissection of the deceased was forbidden, preventing the development of basic anatomical knowledge.[31]

In the 1700s, the popularity of acupuncture in China diminished, as rationality took precedence over superstitious beliefs. In 1822, the Chinese Emperor signed a decreed excluding the practice of acupuncture from the Imperial Medical Institute.[31] In the 20th century, China became increasingly influenced by Western medicine. Acupuncture was eventually outlawed in China in 1929, along with other traditional Chinese medicine practices, before being re-instated by the Communist party in 1949.[31] The conflicting theories and beliefs about Chinese medicine were converged into a belief system known as "traditional Chinese medicine" (TCM). Acupuncture research organizations were founded in the 1950s and acupuncture services became available in modern hospitals.[31]

International expansion

Acupuncture spread to Korea in the sixth century AD, which was followed by Japan. As Vietnam began trading with Japan and China around the ninth century AD, it was influenced by their acupuncture practices as well.[31] France was an early adopter among "the West" due to the influence of Jesuit missionaries, who brought the practice to French clinics in the sixteenth century.[31] Americans and Britains began showing interest in acupuncture in the early 1900s.[31] By the mid-1900s, acupuncture had fallen into "disrepute", until an edition of Osler's textbook described "dramatic success in the treatment of back pain with hat-pins." (the comment was later removed in future editions).[31] In 1971, a New York Times reporter published an article on his acupuncture experiences in China. This led Western doctors to investigate acupuncture practices in China for its use in surgical analgesia.[31] According to an article in Rheumatology, "despite initial excitement [...] acupuncture proved to be utterly unreliable as an analgesic for surgery in the West." However, it reached "its present level" of support in the US after a National Institute of Health report found "positive evidence for its effectiveness, at least in a limited range of conditions."[31]

Some Western medical practitioners abandoned acupuncture's traditional beliefs in spiritual energy, and instead developed a model based on the idea of nerve endings influencing the brain.[31] Some research suggested needles stimulated intrinsic "pain inhibitory mechanisms", while others note that the modern era's "trigger points of Travell" are at the same locations as the spiritually identified points previously. The article in Rheumatology said however that no "valid data" ever emerged from which to provide relevant clinical guidelines.[31]

Middle history

Acupuncture chart from Shisi jing fahui (Expression of the Fourteen Meridians) written by Hua Shou (fl. 1340s, Ming Dynasty). Japanese reprint by Suharaya Heisuke (Edo, 1. year Kyōhō = 1716).

Korea is believed to be the second country that acupuncture spread to outside of China.[279] Within Korea there is a legend that acupuncture was developed by the legendary emperor Dangun though it is more likely to have been brought into Korea from a Chinese colonial prefecture.[279]

Around 90 works on acupuncture were written in China between the Han Dynasty and the Song dynasty, and the Emperor Renzong of Song, in 1023, ordered the production of a bronze statuette (Dongren) depicting the meridians and acupuncture points then in use.[279] However, after the end of the Song dynasty, acupuncture lost status, and started to be seen as a technical profession, in comparison to the more scholarly profession of herbalism.[280] It became rarer in the following centuries, and was associated with less prestigious practices like alchemy, shamanism, midwifery and moxibustion.[280]

Portuguese missionaries in the 16th century were among the first to bring reports of acupuncture to the West.[281] Jacob de Bondt, a Dutch surgeon traveling in Asia, described the practice in both Japan and Java.[282] However, in China itself the practice was increasingly associated with the lower-classes and illiterate practitioners.[282]

In 1674, Hermann Buschoff, a Dutch priest in Batavia, published the first book on moxibustion (from Japanese mogusa).[283] The first elaborate Western treatise on acupuncture was published in 1683 by Willem ten Rhijne, a Dutch physician who had worked at the Dutch trading post Dejima in Nagasaki for two years.[284] In 1712 a detailed description of the treatment of "Colics" in Japan was published by the German physician Engelbert Kaempfer. But while moxibustion was widely discussed among central European physicians, ten Rhijne's and especially Kaempfer's explanations about piercing the abdomen had caused some misunderstandings that eventually led to the refutal of acupuncture by influential scholars such as Lorenz Heister and Georg Stahl.[285]

In 1757 the Chinese physician Xu Daqun described the further decline of acupuncture, saying it was a lost art, with few experts to instruct; its decline was attributed in part to the popularity of prescriptions and medications, as well as its association with the lower classes.[286] In 1822, an edict from the Emperor Daoguang banned the practice and teaching of acupuncture within the Imperial Academy of Medicine outright, as unfit for practice by gentlemen-scholars.[287] At this point, acupuncture was still cited in Europe with both skepticism and praise, with little study and only a small amount of experimentation.[287]

While the details of how acupuncture came to Europe are debated, the French doctor Louis Berlioz (the father of the composer Hector Berlioz) is usually credited with first experimenting the procedure in 1810, before publishing his findings in 1816.[287] In the United States, the earliest reports of acupuncture date back to 1826, when Franklin Bache, a surgeon of the United States Navy, published a report in the North American Medical and Surgical Journal on his use of acupuncture to treat lower back pain.[288] Since the beginning of the 19th century, acupuncture was practiced by Asian immigrants living in Chinatowns.[288] In the early 19th century, an interest arose both in the US and Europe.[7]

Modern era

Richard Nixon meets with Mao Zedong in Beijing, February 21, 1972.

In the early years after the Chinese Civil War, Chinese Communist Party leaders ridiculed traditional Chinese medicine, including acupuncture, as superstitious, irrational and backward, claiming that it conflicted with the Party's dedication to science as the way of progress.[289] Communist Party Chairman Mao Zedong later reversed this position, saying that "Chinese medicine and pharmacology are a great treasure house and efforts should be made to explore them and raise them to a higher level."[289] Under Mao's leadership, in response to the lack of modern medical practitioners, acupuncture was revived and its theory rewritten to adhere to the political, economic and logistic necessities of providing for the medical needs of China's population. Despite Mao proclaiming the practice of Chinese medicine to be "scientific", the practice was based more on the materialist assumptions of Marxism in opposition to superstition rather than the Western practice of empirical investigation of nature.[290] Later the 1950s TCM's theory was again rewritten at Mao's insistence as a political response to the lack of unity between scientific and traditional Chinese medicine, and to correct the supposed "bourgeois thought of Western doctors of medicine".[290] Despite publicly promoting the practice, Mao himself did not believe in or use traditional Chinese medicine.[291]

Acupuncture gained attention in the United States when the U.S. President Richard Nixon visited China in 1972.[292] During one part of the visit, the delegation was shown a patient undergoing major surgery while fully awake, ostensibly receiving acupuncture rather than anesthesia.[292] Later it was found that the patients selected for the surgery had both a high pain tolerance and received heavy indoctrination before the operation; these demonstration cases were also frequently receiving morphine surreptitiously through an intravenous drip that observers were told contained only fluids and nutrients.[292] One patient receiving open heart surgery while awake was ultimately found to have received a combination of three powerful sedatives as well as large injections of a local anesthetic into the wound.[56]

The greatest exposure in the West came after New York Times reporter James Reston received acupuncture in Beijing for post-operative pain in 1971 and wrote complaisantly about it in his newspaper.[293] In 1972 the first legal acupuncture center in the U.S. was established in Washington DC; during 1973-1974, this center saw up to one thousand patients.[294] In 1973 the American Internal Revenue Service allowed acupuncture to be deducted as a medical expense.[295]

Acupuncture has been the subject of active scientific research both in regard to its basis and therapeutic effectiveness since the late 20th century.[74] Even though acupuncture is currently widely used in clinical practice, it remains a controversial topic.[74] In 2006, a BBC documentary Alternative Medicine filmed a patient undergoing open heart surgery allegedly under acupuncture-induced anesthesia. It was later revealed that the patient had been given a cocktail of weak anesthetics that in combination could have a much more powerful effect. The program was also criticized for its fanciful interpretation of the results of a brain scanning experiment.[296][297] Acupuncture is identified by Chinese people globally as part of their intangible cultural heritage.[32]

Adoption

Acupuncture is popular in China,[30] the US,[17] Australia,[298] Europe,[299] and in all five Nordic countries, though less so in Finland.[300] It is most heavily practiced in China[30] and one of the most common alternative medicine practices in Europe.[299]:45

In the United Kingdom, a total of 4 million acupuncture treatments were administered in 2009.[301] Acupuncture is used in most pain clinics and hospices in the UK.[41] An estimated 1 in 10 adults in Australia used acupuncture in 2004.[298] The use of acupuncture in Germany raised by 20% in 2007, after the German acupuncture trials supported its efficacy for certain uses, leading to support of certain insurance claims.[302] As a result of these trials, acupuncture would be covered by public health insurers in Germany for chronic low back pain and osteoarthritis of the knee, though no coverage was offered for tension headache or migraine.[303] This decision was based in part on socio-political reasons.[303] Some insurers in Germany chose to stop reimbursement of acupuncture because of the trials.[304] For other conditions, insurers in Germany were not convinced that acupuncture had adequate benefits over usual care or sham treatments.[305] Highlighting the results of the placebo group, researchers refused to accept a placebo therapy as efficient.[306] There were more than one million users in the country by 2011.[302] It's estimated that 25 percent of the Japanese population will try acupuncture at some point,[33] though in most cases in Japan it is not covered by public health insurance.[33]

Users of acupuncture in Japan are more likely to be elderly and to have a limited education.[33] Approximately half of users surveyed indicated a likelihood to seek such remedies in the future, while 37% did not.[33] Insurance companies in Germany estimated that two-thirds of acupuncture users in the country are women.[302] In Switzerland, acupuncture has become the most frequently used alternative medicine since 2004.[307] Less than one percent of the US population reported having used acupuncture in the early 1990s.[308] By the early 2010s, more than 14 million Americans reported having used acupuncture as part of their health care.[308]

Regulation

There are various government and trade association regulatory bodies for acupuncture in the United Kingdom, the United States, Saudi Arabia, Australia, Japan, Canada, in European countries and elsewhere. The World Health Organization recommends that before being licensed or certified, an acupuncturists receive 200 hours of specialized training if they are a physician and 2,500 hours for non-physicians; many governments have adopted similar standards.[309]

In China, the practice of acupuncture is regulated by the Chinese Medicine Council that was formed in 1999 by the Legislative Council. It includes a licensing exam and registration, as well as degree courses approved by the board.[310] Canada has acupuncture licensing programs in the provinces of British Columbia, Ontario, Alberta and Quebec; standards set by the Chinese Medicine and Acupuncture Association of Canada are used in provinces without government regulation.[299] Regulation in the US began in the 1970s[311] in California, which was eventually followed by every state but Wyoming and Idaho.[309][312] Licensing requirements vary dramatically from state to state. The needles used in acupuncture are regulated in the US by the Food and Drug Administration.[312] In some states acupuncture is regulated by a board of medical examiners, while in others by the board of licensing, health or education.[309]

In Japan, acupuncture practitioners are licensed by the Minister of Health, Labour and Welfare after passing an examination and graduating from a technical school or university.[313] Australia regulates Chinese medical traditions through the Chinese Medicine Board of Australia and the Public Health (Skin Penetration) Regulation of 2000. It restricts the use of words like "Acupuncture" and "Registered Acupuncturist".[citation needed] At least 28 countries in Europe have professional associations for acupuncturists.[313] In France, Académie Nationale de Médecine National Academy of Medicine has regulated acupuncture since 1955.[314]

See also

Bibliography

Notes

  1. ^ Placebo or sham acupuncture is a form of acupuncture that uses non-penetrating needles or needling at non-acupuncture points.[14]
  2. ^ a b c Singh & Ernst (2008) stated, "Scientists are still unable to find a shred of evidence to support the existence of meridians or Ch'i",[21] "The traditional principles of acupuncture are deeply flawed, as there is no evidence at all to demonstrate the existence of Ch'i or meridians"[22] and "Acupuncture points and meridians are not a reality, but merely the product of an ancient Chinese philosophy"[23]

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Further reading

  • Deadman, P.; Baker, K; Al-Khafaji, M. (2007). A Manual of Acupuncture. Journal of Chinese Medicine Publications. ISBN 0951054651. 
  • Jin, G.; Jin, J.X.; Jin, L.L. (2006). Contemporary Medical Acupuncture – A Systems Approach. Springer. ISBN 7040192578. 
  • Ulett GA (2002). "Acupuncture". In Shermer M. The Skeptic Encyclopedia of Pseudoscience. ABC-CLIO. pp. 283 ff. ISBN 978-1-57607-653-8. 
  • William FW, ed. (2013). "Acupuncture". Encyclopedia of Pseudoscience: From Alien Abductions to Zone Therapy. Routledge. pp. 3–4. ISBN 978-1-135-95522-9. 

External links

Energy medicine - edit
NCCAM classifications
  1. Alternative Medical Systems
  2. Mind-Body Intervention
  3. Biologically Based Therapy
  4. Energy Therapy
See also