Concentration effect

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The concentration effect refers to the rapid rise in Fa(alveolar concentration)/Fi(inspired concentration) of an inhaled gas. In simple terms, the higher the concentration of gas used the faster the alveolar concentration of that gas. This theoretically only happens with nitrous oxide.

[edit] References

Korman B, Mapleson WW (May 1997). "Concentration and second gas effects: can the accepted explanation be improved?". Br J Anaesth 78 (5): 618–25. PMID 9175984.

v t e Anesthesia

Types	General (Twilight) Local (Topical) Spinal Epidural Dental (Inferior alveolar nerve) Neuroleptanalgesic anesthesia Brachial plexus block

Techniques	Airway management Anesthesia provision in the US Capnography Concentration effect Dogliotti's principle Drug-induced amnesia Fink effect Intraoperative neurophysiological monitoring Penthrox inhaler Tracheal intubation

Measurements	ASA physical status classification system Baricity Bispectral index Direct Fick method Entropy monitoring Fick principle Goldman index Guedel's classification Mallampati score Minimum alveolar concentration Neuromuscular monitoring

Instruments	Anaesthetic machine Anesthesia cart Boyle's machine Gas cylinder Laryngeal mask airway Medical monitor Odom's indicator Relative analgesia machine Vaporiser

Drugs	Benzodiazepine Etomidate General anaesthetic Inhalational anaesthetic Infiltration analgesia Ketamine Local anesthetic Methohexital Methoxyflurane Midazolam Neuraxial blockade Propofol Thiopental Thiopentone

Complications	Emergence delirium Allergic reactions Anesthesia awareness Local anesthetic toxicity Malignant hyperthermia Perioperative mortality Postanesthetic shivering Postoperative nausea and vomiting Postoperative residual curarization

Fields of study	Cardiothoracic Geriatric Oral sedation dentistry

Professions	Anesthesiologist Anesthesiologist assistant Nurse anesthetist Operating Department Practitioners Certified Anesthesia Technician Certified Anesthesia Technologist Anaesthetic technician

History	A.C.E. mixture Helsinki Declaration for Patient Safety in Anaesthesiology History of general anesthesia History of neuraxial anesthesia History of tracheal intubation

Organizations	American Association of Nurse Anesthetists American Society of Anesthesia Technologists & Technicians American Society of Anesthesiologists Anaesthesia Trauma and Critical Care Association of Anaesthetists of Great Britain and Ireland Association of Veterinary Anaesthetists Australian and New Zealand College of Anaesthetists Australian Society of Anaesthetists International Anesthesia Research Society