Poster 174: Arthroscopic rotator cuff repair with bioinductive patch achieves equivalent patient- reported outcomes at 1 year

OBJECTIVES: To compare patient reported outcomes, range of motion (ROM), and complications of patients undergoing arthroscopic rotator cuff repair (RCR) augmented with a bioinductive patch compared to standard repair. METHODS: A retrospective review of patients undergoing primary arthroscopic rotator cuff repair with and without bioinductive bovine collagen patch augmentation for supraspinatus/infraspinatus tears from 2016 to 2021 at a single institution was performed. Patients were excluded based on the following criteria: age <18 years, open or mini-open rotator cuff repair, prior surgery of the affected shoulder (except diagnostic arthroscopy), rheumatological disease, active infection, or cancer. Patients who underwent RCR augmented with a collagen patch were matched 1:1 to those undergoing standard rotator cuff repair based on tear thickness and size. The electronic medical record was used to obtain patient demographics, range of motion (ROM), and assess for complications. MRI or ultrasound was used to confirm tear and classify size using the DeOrio and Cofield classification of small (<1cm), medium (1-3cm), large (3-5cm), and massive (>5cm). In addition, Patient Reported Outcome Information System (PROMIS) scores were recorded at preoperative, 6 weeks, 3 months, 6 months, and 1 year postoperative time points. RESULTS: Fifty-four patients underwent RCR with patch augmentation and were matched to 54 controls. No significant differences were found between groups in terms of age (56.7 ± 9.0 patch vs. 59.3 ± 8.5 years control, p=0.12), sex, smoking, diabetes, degenerative vs. traumatic tears (50% vs. 50.9%, p=1.0), partial vs. full thickness (38.9% vs. 25.5%, p=0.2), as well as tear size (p=0.8). ROM in forward flexion (FF) and abduction (ABD) were significantly increased at 1 year compared to controls (FF 162 +/- 22 vs. 148 +/- 26 degrees, p<0.01; ABD 137 +/- 37 vs. 117 +/- 40, p=0.047). No differences were seen for PROMIS- UE, but PROMIS-PI scores were significantly lower in the patch group at 6 months (55.2 +/- 8.0 vs. 61.9 +/- 2.0, p<0.01) and 1 year (56.0 +/- 7.5 vs. 62.1 +/- 3.6, p<.01). The patch group had 7 retears compared to 0 controls (13.0% vs 0%, 2/7 for subscapularis tears not augmented) and 1 biceps tenodesis rupture, with 5 requiring revision surgery. CONCLUSIONS: Bioinductive patch augmentation for RCR demonstrated increased ROM, but equivalent physical function after 1 year.