Aim: To present and analysis the neurological complications after ORIF with plates of bicondylar fractures of the humerus.

Material and Methods: For the period 1996 – 2003 77 bicondylar fractures were operated with plates. All of them were followed up. 36 Man and 41 women. Dominant hand was affected in 43 patients. The AO types were C1- 25, C2 – 28, C3 – 24. There were 18 open fractures (I–II degree).

High-energy trauma caused 19 fractures. 14 were with associated ipsilateral fractures of the upper limb. All patients were operated by the standard AO technique. In all patients the ulnar nerve was identified. There was no case where the radial nerve was exposed. In 36 patients the nerve was transposed anteriorly subcutaneosly and for the rest it was not.

Results: We observed 20 postoperative ulnar and radial nerve disfunctions (19 ulnar nerve and 1 radial nerve disfunctions). Electromiography was performed in all cases. 7 of 36 (with transposition) cases finished with temporary ulnar nerve palsy. 3 of 41 (without transposition) cases finished with permanent ulnar nerve palsy and the other 9 of 41 finished with temporary disfunction. The disfunction of the radial nerve was temporary. The temporary neurological disfunctions recovered completely for 3–7 months. Neurolysis and anterior transposition of the ulnar nerve was performed in the cases with permanent ulnar nerve palsy.

Conclusions: We suggest that ulnar nerve transposition is a method of choice in operative treatment of bicondylar fractures of the humerus. Careful management of the ulnar nerve is mandatory. Meticulous soft-tissue dissection and hemostasis help to prevent perineural fibrosis.