Insufficiency caused by incompetent perforator
Their role is primordial in maintaining correct blood draining. They have valves which prevent blood flowing back (regurgitation) from deep to superficial veins in muscular systole  or contraction.
They exist along the length of the lower limb, in greater number in the leg (anatomical ref to below knee) than in the thigh.
Some veins are named after the physician who first described them:
- Dodd's perforator at the inferior 1/3 of the thigh
- Boyd's perforator at the knee level
- Cockett's perforators at the inferior 2/3 of the leg (usually there are three: superior medium and inferior Cockett perforators)
Others have the name of the deep vein where they drain:
- Medial gastrocnemius perforator, draining into the gastrocnemius vein
- Fibular perforators, usually two, one superior near the lateral aspect of the knee and one inferior at the lateral aspect of the ankle
When the valves of perforator veins become incompetent they can cause venous reflux when the muscles contract. This has been explained by Mark Whiteley as "active venous reflux". The resulting reflux can cause a rapid deterioration in an existing varicose disease and be responsible for the development of venous ulcers.
In the past, when varicose vein surgery is undertaken, the surgeon carefully ligated all perforators, but some believe that you can use conservative techniques to treat varicose disease use perforators to drain the superficial venous system. In this case, lower limbs venous ultrasonography plays an important role in evaluating which continent perforators can be used.
However, increasing evidence (see below) is starting to favor the treatment of incompetent perforator veins by minimally invasive techniques such as TRLOP.
Whether incompetent perforator veins (IPVs) require treatment or not is controversial, particularly when associated with the treatment of varicose veins. However research has shown that there is a clear association between the presence of IPVs and recurrent varicose veins.
Before 1985, the ligation of IPVs needed open surgery. In 1985, G. Hauer described the Sub-fascial endoscopic perforator vein surgery (SEPS) technique allowing IPVs to be clipped through a small incision.
SEPS was superseded in 2001 by a minimally invasive technique using pin hole surgery, called TRansLuminal Occlusion of Perforators (TRLOP) which by 2009 had shown to be as effective as SEPS in a 5-year study. As TRLOP can be performed under local anaesthetic and under ultrasound guidance, the advantages over the more invasive and painful SEPS were clear.
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- http://www.veinsveinsveins.com/perforators[full citation needed]
- Cavezzi A, Labropoulos N, Partsch H, et al. (March 2006). "Duplex ultrasound investigation of the veins in chronic venous disease of the lower limbs--UIP consensus document. Part II. Anatomy". European Journal of Vascular and Endovascular Surgery. 31 (3): 288–99. doi:10.1016/j.ejvs.2005.07.020. PMID 16230038.
- "Understanding Venous Reflux - the cause of varicose veins and venous leg ulcers". 2011.
- Linton RR (April 1938). "The communicating veins of the lower leg and the operative technic for their ligation". Annals of Surgery. 107 (4): 582–93. doi:10.1097/00000658-193804000-00013. PMC 1386842. PMID 17857163.
- Franceschi, Claude (1988). Théorie et Pratique de la Cure Conservatrice et Hémodynamique de l'Insuffisance Veineuse en Ambulatoire (1st ed.). Précy-sous-Thil: Armançon. ISBN 2-906594-06-7.[page needed]
- Whiteley MS (September 2014). "Part One: For the Motion. Venous Perforator Surgery is Proven and Does Reduce Recurrences". European Journal of Vascular and Endovascular Surgery. 48 (3): 239–42. doi:10.1016/j.ejvs.2014.06.044. PMID 25132056.
- Rutherford EE, Kianifard B, Cook SJ, Holdstock JM, Whiteley MS (May 2001). "Incompetent perforating veins are associated with recurrent varicose veins". European Journal of Vascular and Endovascular Surgery. 21 (5): 458–60. doi:10.1053/ejvs.2001.1347. PMID 11352523.
- Hauer G (1985). "[Endoscopic subfascial discussion of perforating veins--preliminary report]". VASA (in German). 14 (1): 59–61. PMID 3976278.
- Kianifard B, Browning L, Holdstock JM, Whiteley MS. "Surgical technique and preliminary results of perforator vein closure - TRLOPS (Transluminal Occlusion of perforators)". in "Vascular surgical society of Great Britain and Ireland abstracts". BJS. 89 (4): 507–26. April 2002. doi:10.1046/j.0007-1323.2001.02021.x.
- Bacon JL, Dinneen AJ, Marsh P, Holdstock JM, Price BA, Whiteley MS (April 2009). "Five-year results of incompetent perforator vein closure using TRans-Luminal Occlusion of Perforator". Phlebology. 24 (2): 74–8. doi:10.1258/phleb.2008.008016. PMID 19299275.
- The College of Phlebology (December 14, 2012). "TRLOP closure of incompetent perforating vein (IPV)". The College of Phlebology. Retrieved August 25, 2014.
- Elias S, Peden E (2007). "Ultrasound-guided percutaneous ablation for the treatment of perforating vein incompetence". Vascular. 15 (5): 281–9. doi:10.2310/6670.2007.00068. PMID 17976328.
- Whiteley MS (December 2010). "Letter regarding: 'The role of perforators in chronic venous insufficiency' by TF O'Donnell. Phlebology 2010;25:3-10". Phlebology. 25 (6): 314, author reply 315–6. doi:10.1258/phleb.2010.010013. PMID 21107003.