Suprascapular nerve block for the treatment of frozen shoulder in primary care: a randomized trial.

BACKGROUND

Frozen shoulder is a common problem in general practice, but its treatment is difficult since none of the currently used therapies are proven to be effective.

AIM

To assess the effectiveness of suprascapular nerve block to relieve pain and improve range of movement, and its suitability for use in primary care. This small study by a single practitioner aims to justify a larger multicentred trial.

METHOD

A randomized trial of 30 patients to compare a single suprascapular nerve block with a course of intra-articular injections. Patients' pain levels and ranges of movement were assessed over a 12-week period.

RESULTS

Suprascapular nerve block produced a faster and more complete resolution of pain and restoration of range of movement than a series of intra-articular injections. These differences were confirmed by statistical analysis using the Mann-Whitney U-test (P < 0.01 for pain levels and P < 0.05 for range of abduction and external rotation.)

CONCLUSIONS

This study suggests that suprascapular nerve block is a safe and effective treatment for frozen shoulder in primary care, and justifies a larger multicentred trial using independent blinded assessment. Such a study should include a third group treated by suprascapular nerve block without steroid; a more comprehensive assessment of patient debility.