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THERMAL CAPSULORRAPHY FOR THE TREATMENT OF MULTIDIRECTIONAL INSTABILITY OF THE SHOULDER: A PROSPECTIVE, CONSECUTIVE SERIES



Abstract

Purpose: The objective of the study was to perform a prospective evaluation of thermal capsulorraphy for the treatment of multidirectional instability of the shoulder.

Summary of Methods: Over a period of two years, 19 patients with multidirectional instability were treated with thermal shrinkage. Fifteen patients had involuntary dislocation and four voluntary. The predominant direction of instability was anterior/inferior in 10, posterior in 5 and multiple directions in 4. Patients were followed for a minimum of two years or until surgical failure and recurrence of symptomatology. Postoperatively patients were immobilised in a sling for a period of 3 weeks and were reviewed at 6 weeks and 3, 6, 9 and 12 months and then at six monthly intervals. The Western Ontario shoulder Instability Index was used as a clinical outcome measure as well as subjective and objective evaluation of patient’s function, range of motion, pain and instability.

Results: Nine patients had recurrence of their instability occurring at an average of nine months following their surgical procedure (range 7–14 months). One patient had axillary nerve dysfunction postoperatively with difficulty in abducting the shoulder. Three patients had sensory dysaesthesia related to the axillary nerve territory. All neurological subjective evaluations recovered within 9 months. Four of five patients with a predominantly posterior direction to their instability failed this surgical procedure. Only 2 of 10 (20%) with predominantly anterior instability failed.

Conclusion: Analysis of patients with multidirectional laxity determined that thermal capsulorraphy had a high failure rate (9/19, 47%) with associated significant postoperative complications including axillary nerve dysaesthesias and stiffness.

The abstracts were prepared by David Stanley. Correspondence should be addressed to him c/o British Orthopaedic Association, Royal College of Surgeons, 35–43 Lincoln’s Inn Fields, London WC2A 3PN.