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Outcomes of Endoscopic GM Repair in 34 Patients with Minimum Two-year Follow-up

      Introduction

      The study purpose is to provide an update on a previously published study of patients with a gluteus medius (GM) tear, including a larger cohort and minimum two-year follow-up.

      Methods

      Thirty-four patients were identified from April 2009 to April 2012 who had undergone an endoscopic GM repair with minimum two-year follow-up. Patients were excluded if they had revision surgeries and previous hip conditions. Patient reported outcome (PRO) measures collected included the modified Harris Hip Score, Non-Arthritic Hip Score, Hip Outcome Score Activities of Daily Living and Hip Outcome Score Sports Specific Subscales. The visual analog scale (VAS) and patient satisfaction were also recorded.

      Results

      The cohort consisted of two men and 32 women with a mean age of 57 years (range 20 years to 79 years). Ten patients had a full thickness tear and 24 patients had a partial thickness tear. Seventeen patients were treated with completion of the tear and suture bridge technique and 17 patients with the transtendinous technique. There was a significant improvement of all four PRO at three specified timepoints. The mean pain VAS decreased from 6.6 to 2.4 at two-year follow-up (p<0.05). The mean satisfaction was 8.5 at two-years post-surgery. Twenty-six of 34 (76%) patients increased their abduction strength by at least one grade on manual muscle testing. Of 26 patients who had a gait deviation pre-operatively, 15 (58%) regained a completely normal gait. There was no significant difference in PRO measures between patients when comparing surgical techniques.

      Conclusion

      Endoscopic surgical repair can be an effective treatment of GM tears at a minimum follow-up of two-years.