Physiotherapy treatment for atraumatic recurrent shoulder instability: early results of a specific exercise protocol using pathology-specific outcome measures.

BACKGROUND: Recurrent shoulder instability is usually caused by a traumatic event resulting in structural pathology, although a small subgroup of patients experience symptomatic recurrent shoulder instability without trauma. These patients are usually treated non-operatively but limited evidence exists regarding effective conservative management. In particular, there is a lack of reproducible exercise regimes and none that have been tested with condition-specific outcome measures.
METHODS: A service evaluation was conducted over a 15-month period to assess our current treatment protocol used in the management of patients with atraumatic recurrent shoulder instability. The regime is reproducible with target-led progression milestones. Oxford Instability Shoulder Scores (OISS) and Western Ontario Shoulder Index (WOSI) scores were compared between baseline and final follow-up.
RESULTS: Eighteen consecutive patients were included with mean follow-up of 4.5 months (range 1.35 months to 11.77 months). A statistically significant improvement was seen in both outcome measures. Mean OISS improved by 16.67 points (confidence interval: 12.34 to 20.99; p < 0.001). Mean WOSI improved by 36.76% (confidence interval: 28.46 to 45.06; p < 0.001).
CONCLUSIONS: For this small group of patients with recurrent atraumatic shoulder instability, the Derby Shoulder Instability Programme produced significant improvements over the short term, with a high level of patient compliance. This is the first study to include pathology-specific patient-reported outcome measures to assess outcomes from a specific and reproducible exercise regime in this group of patients. The findings support further research to evaluate the exercise protocol in a larger group of patients over the longer term.