Subspinal impingement: clinical outcomes of arthroscopic decompression with one year minimum follow up
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Subspinal impingement: clinical outcomes of arthroscopic decompression with one year minimum follow up Frankl Michal1 · Eyal Amar2 · Ran Atzmon1 · Zachary Sharfman2 · Barak Haviv2,3 · Gilad Eisenberg2 · Ehud Rath2 Received: 18 August 2017 / Accepted: 28 March 2018 © European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2018
Abstract Purpose This study was designed to (1) evaluate the clinical outcomes after arthroscopic subspinal decompression in patients with hip impingement symptoms and low AIIS, and to (2) assess the presence of low anterior inferior iliac spine on the preoperative radiographs of patients with established subspinal impingement diagnosed intra-operatively. Methods Retrospective analysis of patients who underwent arthroscopic subspinal decompression has been performed. The indications for surgery were femoroacetabular impingement (FAI), or subspinal impingement. Pre-operative radiographs were assessed for anterior inferior iliac spine type. Intra-operative diagnosis of low anterior inferior iliac spine was based on the level of anterior inferior iliac spine extension relative to the acetabulum and the presence of reciprocal labral and chondral lesions. In patients where low anterior inferior iliac spine was not diagnosed on pre-operative radiographs, the pre-operative radiographs were re-read retrospectively to assess missed signs of low anterior inferior iliac spine. Results Thirty-four patients underwent arthroscopic subspinal decompression between 2012 and 2015. The patients were followed for a median of 25 months (13–37 months). Intra-operatively, grade 2 anterior inferior iliac spine was found in 27 patients and grade 3 anterior inferior iliac spine was found in 7 patients. MHHS, HOS, and HOSS scores increased from median (range) pre-operative scores of 55 (11–90), 48 (20–91) and 20 (0–80) to 95 (27–100), 94 (30–100) and 91 (5–100), respectively (p
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