Anti-Claw Procedure with Modified Dynamic Flexor Digitorum Superficialis Transfer for Ulnar Nerve Palsy: Our Experience

Modification of the Zancolli Lasso Procedure for Simultaneous Correction of Wartenberg’s Sign

“…1 Multiple authors have reported excellent success with this technique. [1][2][3][4] A second motor imbalance between the deficient ulnarinnervated intrinsic muscles and the intact radial-innervated extensors can lead to an abducted posture of the small finger, first described by Wartenberg. 5 Because the extensor digiti minimi (EDM) tendon inserts onto the ulnar aspect of the small finger extensor hood, 6 it imparts an abduction vector to the small finger MP joint.…”

“…Often referred to as the Zancolli lasso procedure (ZLP), the cut end of the donor FDS tendon is wrapped around the flexor tendon pulley of the affected digits and secured to itself with suture thus forming a “lasso” that maintains MP joint flexion 1 . Multiple authors have reported excellent success with this technique 1–4 …”