The pulp switch flap: an option for the treatment of loss of the dominant half of the digital pulp.

Abstract

The fingertip has an important role in bi-digital pinch quality, and pulp loss is common and difficult to solve. The pulp switch consists of a pulp island flap with a homodigital neurovascular pedicle, vascularized by the palmar digital artery of the non-dominant pulp transposed to the dominant pulp side. We report the results in 16 patients treated for loss of the dominant half of a digital pulp from January 2000 to December 2008. On review after a minimum of 6 (range 6-18) months, the Weber's test demonstrated an average of 8 mm in static 2 point discrimination test for all digits, except the ring finger. In the monofilament Semmes-Weinstein test, we obtained a score of 3.61 for the thumb and little fingers, and 4.31 for the other fingers. We did not find partial or total necrosis of the flap. The pulp switch flap gave satisfactory functional results for viability, sensitivity, and digital mobility providing a sensate bi-digital pinch with acceptable aesthetic results in a single surgical procedure.