Use of platelet-leukocyte membrane in arthroscopic repair of large rotator cuff tears: a prospective randomized study.

Background: Arthroscopic rotator cuff repair generally provides satisfactory results including decreased shoulder pain and improved shoulder motion. Unfortunately, imaging studies demonstrate that the retear rate associated with the available arthroscopic techniques may be high. The purpose of this study was to evaluate the clinical and magnetic resonance imaging (MRI) results of arthroscopic rotator cuff repair with and without the use of platelet-leukocyte membrane in patients with a large posterosuperior rotator cuff tear.