When the membrane was used, we introduced the post suture inside the membrane before the passage of the suture throughout the lateral edge of the tendon. In all cases, in order to facilitate the passage of the membrane inside the cannula, we momentarily removed the rubber diaphragm of the 8 mm cannula and stopped the pump (Fig. 2). In this manner, the membrane was positioned between the abraded foot print area and the lateral edge of the cuff so that it could not be displaced or moved during the successive phases of the rotator cuff suture (Fig. 3). When the membrane was used, we utilized one membrane per each anchor.

Our results are summarized in Table 1 and 2.