Original article
Endoscopic Iliotibial Band Release for External Snapping Hip Syndrome

https://doi.org/10.1016/j.arthro.2005.12.030Get rights and content

Purpose: The external snapping hip syndrome is caused by slippage of the iliotibial band over the greater trochanter. Most cases are treated conservatively but if this fails, open surgical treatment is commonly performed by Z-plasty or by creating a defect on the iliotibial band. We present a series of 11 hips that were surgically treated by an endoscopic technique. Type of Study: Prospective consecutive series of patients. Methods: Diagnosis of external snapping hip syndrome was clinical in all cases and anteroposterior pelvis radiographs were taken to evaluate the hip joint. Endoscopic release was performed with the patient in the lateral decubitus position without traction using 2 portals, the superior trochanteric and inferior trochanteric. A standard 4-mm, 30° arthroscope was introduced at the inferior trochanteric portal over the iliotibial band. A needle was placed at the proximal trochanteric portal and visualized endoscopically. The portal was then established and subcutaneous tissue resection was performed with radiofrequency (RF) probes and a shaver until the iliotibial band was identifiable and released with a vertical cut made using an RF hook probe. The arthroscope was introduced into the space created under the iliotibial band and a transverse cut at the middle of the vertical release was then made, creating a cross-shape. Next the 4 resulting flaps were resected to make a diamond-shaped defect. Results: Between September 2001 and December 2003, we treated 11 patients, 9 female (1 bilateral) and 1 male with an average age of 26 years, for external snapping hip syndrome using an endoscopic technique. At an average 2-year follow-up, we had 1 patient with nonpainful snapping. The rest of the patients in the series had no complaints and returned to their previous level of activity. Conclusions: We present a reproducible endoscopic technique for the treatment of external snapping hip syndrome. Our results are comparable to those reported for open procedures. Level of Evidence: Level IV.

Section snippets

Methods

Between September 2001 and December 2003, patients in a consecutive series with the diagnosis of external snapping hip who did not respond to conservative treatment, including physical therapy and local corticosteroid injection, were treated by endoscopic release of the ITB. The preoperative evaluation included the identification of a snap by palpation (sometimes audible) of the trochanteric region with flexion of the hip from the extended position and vice versa, accompanied with pain. The

Results

We treated 10 patients, 9 female (1 bilateral) and 1 male with an average age of 26 years (range, 21 to 35 years). Four patients participated in sports activity (1 tri-athlete, 2 long distance runners, 1 soccer player). The mean duration of the symptoms before endoscopic ITB release was 31 months (range, 10 to 38 months). They had all been treated with physical therapy with no response and had received an average of 3 corticosteroid injections (range, 1 to 6) without improvement. No pathology

Discussion

The incidence of external snapping hip is unknown.4 A few studies report on open techniques for the treatment of this condition. In our series, we used an endoscopic technique. Our results compare well with those reported of open release or open Z-plasty (Table 1).

The weakness of this study is that we present a small number of patients with short follow-up (only 7 patients completed 2 or more years). Longer follow-up of a larger series of patients would better demonstrate the results of

Conclusions

In our hands, the endoscopic release of the ITB for the treatment of external snapping is an effective and reproducible procedure. We have presented 11 consecutive cases treated with an endoscopic technique with 100% resolution of pain and 91% resolution of snapping symptoms.

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