The keystone perforator island flap first described by behan is based on randomly located vascular perforators and is used as a locoregional flap option for almost every part of the body its name refers to the curved wedge shaped block at the apex of roman archways. Up to 90 off textbooks at amazon canada plus free two day shipping for six months when you sign up for amazon prime for students. Keystone design perforator island flap kdpif devised by behan in 2003 has been applied to various fields of reconstructive surgery in the past decade due to its design simplicity robust vascular supply and reproducibility. The keystone design perforator island flap in reconstructive surgery article in chinese yang c xing x xu j xu m fang s sun z objective to introduce the experience in skin defects reconstruction using keystone design perforator island flap methods since june 2012 to june 2013 the flaps have been used in 14 patients the size of defects ranged from 1 cm x 1 cm to 5 cm x 9 cm at