THE LATERAL FOREARM FLAP - AN ANATOMIC STUDY

The anatomy of the lateral forearm flap has been studied in 12 fresh c adaver arms with methylene blue and latex injections and arteriography . The posterior radial collateral artery was found to divide constantl y in to two terminal branches, an anterior and a posterior division. T he anterior division is the nutrient vessel of the flap. This artery e xtends significantly beyond the lateral epicondyle of the elbow into t he lateral aspect of the forearm (range 13 to 18 cm, average 15 cm). T his allows raising a fasciocutaneous flap in the proximal forearm with a much longer vascular pedicle than the classic lateral arm flap. Oth er advantages include very thin skin and subcutaneous tissue and less sensory deficit at the donor site. Based on these results, this newly designed lateral forearm flap has been used in 13 clinical cases. Its main indications are whenever soft, thin, pliable skin is needed for s mall to moderate-sized defects.