This prospective study asked whether the tension at which a rotator cuff tendon is repaired affects functional outcome. Repair tension was measured intraoperatively with a calibrated tensiometer after cyclic loading in 67 full-thickness repairs. Outcomes were tracked with Constant scores, isokinetic strength, and VAS pain and improvement scores over 24 months.
The clinical rule is simple: if you cannot get the tendon to the footprint under low tension, do not force it there. This paper puts a number on a principle every shoulder surgeon states but few had quantified. Repairs above 8 lb of measured tension did poorly on strength, function, pain, and patient-perceived improvement.
The mechanism is length-tension physiology. A tendon fixed while overstretched sits off the peak of its force-generating curve, and the load concentrates on the central suture, inviting rerupture.
The actionable takeaway is technique. When tension is high, perform sequential releases (adhesions, then coracohumeral ligament, then capsule) and consider medializing the footprint up to 1 cm rather than accepting a tight, high-risk repair.
As a single-surgeon prospective series without postoperative imaging, it cannot confirm healing rates, but the tension-outcome relationship is consistent and biomechanically grounded.
This prospective study asked whether the tension at which a rotator cuff tendon is repaired affects functional outcome. Repair tension was measured intraoperatively with a calibrated tensiometer after cyclic loading in 67 full-thickness repairs. Outcomes were tracked with Constant scores, isokinetic strength, and VAS pain and improvement scores over 24 months.
The clinical rule is simple: if you cannot get the tendon to the footprint under low tension, do not force it there. This paper puts a number on a principle every shoulder surgeon states but few had quantified. Repairs above 8 lb of measured tension did poorly on strength, function, pain, and patient-perceived improvement.
The mechanism is length-tension physiology. A tendon fixed while overstretched sits off the peak of its force-generating curve, and the load concentrates on the central suture, inviting rerupture.
The actionable takeaway is technique. When tension is high, perform sequential releases (adhesions, then coracohumeral ligament, then capsule) and consider medializing the footprint up to 1 cm rather than accepting a tight, high-risk repair.
As a single-surgeon prospective series without postoperative imaging, it cannot confirm healing rates, but the tension-outcome relationship is consistent and biomechanically grounded.