Neurovascular Free Toe Pulp Flap Using Dorsal Digital Artery In Finger Reconstruction

Chung, Woo Cheol; Kang, Yang Soo; Lee, Myung Ju; Lee, Chang Keun; Yang, Jeong Yeol

Abstract

Free neurovascular flap transfers have been widely used for restoration of discriminative sensibility and contour of the finger. The free neurovascular flaps from first web space of the foot is a good treatment option to achieve above two conditions. Fingertip reconstruction with a free toe pulp neurovascular flap, since it was described first in 1979, have been reported a lot. But in most cases. toe pulp flap used first dorsal metatarsal artery as a vascular pedicle. The authors, therefore, carried out four dissections on the cadavers to study first web space neurovascular anatomy for using the dorsal digital artery of the foot as a vascular pedicle. On the basis of the results of this cadaver dissection, we reconstructed posttraumatic soft tissue defect of the fingers with first and second toe pulp free flaps in nine patients from February 1999 to April 2000, and obtained adequate functional recovery as well as satisfactory aesthetic appearance. In our case, maximal flap was 2.5 x 2 cm in size, and the dorsal digital artery of the foot, subcutaneous vein and branch of the dorsal deep peroneal nerve were used as a neurovascular pedicle of the flap. All patients gradually recovered a discriminative sensibility, with static two-point discrimination test between 7 and 16mm and a moving two-point discrimination test between 6 and 13mm. The advantages of this free flap from toe(mainly second toe) are minimal donor site morbidity including arterial system, one-stage operation and shorter rehabilitation period. We consider that the free toe pulp flap using dorsal digital artery of the foot is a useful method for reconstruction of small finger soft tissue defect.