- Lesion/Severance median nerve, especially thenar branch (Caution: anatomical variants)
- Lesion of the superficial palmar arch at the distal wound pole
- Lesion of ulnar artery and nerve during splitting of the palmar carpal ligament
- Lesion of palmar branch of median nerve due to incision too far radial or proximal
- incomplete division of flexor retinaculum (digital check)
Management
- primary microsurgical nerve or artery suture in case of nerve or artery injury
- Careful division of the flexor retinaculum and palmar carpal ligament