[Acute carpal tunnel syndrome after distal radius fractures--long term results of surgical treatment with decompression and external fixator application]

Abstract

Acute Carpal Tunnel Syndrome (ACTS) is a relatively rare sequel of distal fractures of the radius. This paper is an analysis of the causes of ACTS and of long-term results of treatment by surgical decompression combined with use of external fixators. Out of 128 patients with distal radius fractures treated in our department 11 cases required surgical treatment because of ACTS. Fractures were classified according to the AO classification as C2 and C3. CTSA was diagnosed basing on typical clinical signs: pain numbness over the radial three and a half fingers. All patients were treated surgically by reduction of the fracture, external fixation and decompression of the median nerve, all performed simultaneously. The results were assessed within 11 months (on average) postoperatively. It was found that ACTS depends on the severity of the fracture (comminuted, dislocated) and on method of treatment (local anaesthesia, multiple reductions, Cotton-Loder position). Long term results: pain was absent the two-point discrimination test was within norm, light sensation was within norm in 9 cases and slightly decreased in 2 cases. There were no positive Phalen tests and no Tinel signs. Grip strength raged from 17 to 120 kg (mean: 38 kg). According to Gartland-werley classification 5 excellent, 3 good, and 3 acceptable results were obtained. This indicates that early recognition and prompt treatment by surgical decompression and external fixation results in significant improvement of symptoms and prevents persistence of symptoms.