Journal Article
Systematic Review
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Treatment for ulnar neuropathy at the elbow.

BACKGROUND: Ulnar neuropathy at the elbow is the second most common entrapment neuropathy after carpal tunnel syndrome. Treatment may be conservative or surgical but optimal management remains controversial.

OBJECTIVES: The objectives of this systematic review were to determine the effectiveness and safety of conservative and surgical treatments in ulnar neuropathy at the elbow.

SEARCH STRATEGY: We searched the Cochrane Neuromuscular Disease Group Specialized Register (16 February 2010), Cochrane Central Register of Controlled Trials (The Cochrane Library 2010, Issue 1), MEDLINE (January 1966 to February 2010), EMBASE (January 1980 to February 2010), AMED (January 1985 to February 2010), CINAHL Plus (January 1937 to February 2010), LILACS (January 1982 to Feburary 2010), PEDro (January 1980 to February 2010), and the papers cited in relevant reviews.

SELECTION CRITERIA: The review included only randomised controlled clinical trials.

DATA COLLECTION AND ANALYSIS: Two authors independently reviewed titles and abstracts of references retrieved from the searches and selected all potentially relevant studies. The authors extracted data from included trials and assessed trial quality independently. They contacted trial investigators for missing information.

MAIN RESULTS: We identified 1461 papers and selected six randomised controlled clinical trials with moderate quality evidence. The sequence generation was not adequate in one study and not described in two studies. We performed two meta-analyses to evaluate the clinical and neurophysiological outcomes of simple decompression versus decompression with submuscular or subcutaneous transposition.We found no difference between simple decompression and transposition of the ulnar nerve for both clinical improvement (risk ratio (RR) 0.93, 95% CI 0.80 to 1.08) and neurophysiological improvement (RR 1.47, 95% CI -0.94 to 3.87). Transposition showed a higher number of wound infections (RR 3.10, 95% CI 1.18 to 8.15).In one trial the authors compared medial epicondylectomy with anterior transposition and found no difference in the clinical and neurophysiological outcomes.One trial assessed conservative treatment in clinically mild or moderate ulnar neuropathy at the elbow. The authors found that information on avoiding prolonged movements or positions was effective in improving subjective discomfort. Night splinting and nerve gliding exercises in addition to the information did not produce further improvement.

AUTHORS' CONCLUSIONS: The available evidence is not sufficient to identify the best treatment for idiopathic ulnar neuropathy at the elbow on the basis of clinical, neurophysiological and imaging characteristics. We do not know when to treat a patient conservatively or surgically. However, the results of our meta-analysis suggest that simple decompression and decompression with transposition are equally effective in idiopathic ulnar neuropathy at the elbow, including when the nerve impairment is severe. In mild cases, evidence from one small randomised controlled trial of conservative treatment showed that information on movements or positions to avoid may reduce subjective discomfort.

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