Outcomes of repair of the lacerated A2 pulley with extensor retinaculum during primary flexor tendon repair.

We report outcomes of repairing the lacerated A2 pulley with extensor retinaculum graft in ten patients (ten fingers) during primary flexor tendon repair in zone 2. Complete A2 pulley lacerations were found in eight fingers and partial A2 pulley laceration in two. We extended the laceration in the sheath to the middle of the A4 or A1 pulley to allow tendon repair with a four-strand core suture. The A2 pulley was reconstructed with an extensor retinaculum graft. All patients followed the early controlled active mobilization protocol and recovered active range of motion at the interphalangeal joints without major extension deficits. Using the Strickland and Glogovac criteria, there were four excellent, five good and one fair result. One finger was graded excellent, eight good, and one fair according to Tang's criteria. No clinical bowstringing was observed. We conclude that extensive pulley lacerations reconstructed with extensor retinaculum primarily ensure functional recovery after tendon repair.

LEVEL OF EVIDENCE: IV.