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Subacromial spacer placement for protection of rotator cuff repair.

ABSTRACT: Rotator cuff repairs have a high failure rate proportional to the tear size. Various techniques have been described to improve the repair strength and failure rate. The described surgical technique uses a biodegradable subacromial balloon-shaped spacer (InSpace; OrthoSpace, Caesarea, Israel) that is implanted arthroscopically to protect our tendon repair. We describe the introduction technique and suggest some hints and tricks. The spacer is placed under direct vision in the subacromial space after the rotator cuff repair is finished. Correct placement is verified by moving the arm freely. The subacromial spacer may help to protect the rotator cuff repair by centering the humeral head and reducing friction between suture knots and the acromion. It may also help to flatten dog-ear formations.

SUBMITTER: Szollosy G

PROVIDER: S-EPMC4246409 | biostudies-literature | 2014 Oct

REPOSITORIES: biostudies-literature

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Subacromial spacer placement for protection of rotator cuff repair.

Szöllösy Gregor G Rosso Claudio C Fogerty Simon S Petkin Kalojan K Lafosse Laurent L

Arthroscopy techniques 20141006 5

Rotator cuff repairs have a high failure rate proportional to the tear size. Various techniques have been described to improve the repair strength and failure rate. The described surgical technique uses a biodegradable subacromial balloon-shaped spacer (InSpace; OrthoSpace, Caesarea, Israel) that is implanted arthroscopically to protect our tendon repair. We describe the introduction technique and suggest some hints and tricks. The spacer is placed under direct vision in the subacromial space af ...[more]

PMID: 25473615

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Project description:AimThe objective of this prospective non-randomized study was to establish the role of biodegradable sub-acromial spacer (InSpace™) insertion in the management of patients with massive irreparable rotator cuff tear by reporting beneficial effects on the pain relief and functional outcomes in these patients.MethodsThis is a prospective non-randomized study of patients treated for irreparable cuff tears during a period between January 2014 and November 2016.14 patients with symptomatic massive irreparable rotator cuff tears were managed with arthroscopic debridement and implantation of a biodegradable subacromial spacer and were followed up for at least one year (8-16 m). Inclusion criteria were patients with irreparable rotator cuff tears that failed the conservative management, with muscle retraction (Patte > stage 2), muscle atrophy, and fatty infiltration (Goutalier type 3). Patients with osteoarthritis grade 3 in the Hamada classification and/or without preserved passive motion were excluded from our study. Outcome measures included pre and postoperative, the range of motion, Constant and Oxford shoulder scores. The decision to perform surgery was made after failure of nonoperative treatment and rehabilitation (massive rotator cuff tear protocol, reading shoulder unit)for at least six months.ResultsFourteen shoulders (14 patients, ten male four female) met the inclusion criteria. The mean age of patients was 76.2 (70-85) years. During the last follow-up (8-16 months mean 12.6 months), the range of motion was significantly increased in all patients with anterior elevation (from 80 to 105°), abduction (from 70 to 110°), and external rotation (from 25 to 35°). The mean Constant score was also significantly (P < 0.001) improved from 22.5 (13-33) preoperatively to 51.4 (30-64) at the last follow-up. The Oxford shoulder score improved from 26 preoperatively (21-28) to 48.2 postoperatively (34-56). No night pain following surgery and ADL increased by 40%, which is significant in these patients. No significant perioperative complications were found except for one patient who had a spacer migration. However, no action was required in that case.ConclusionsArthroscopic implantation of a subacromial spacer for irreparable rotator cuff tear resulted in a noticeable improvement in pain relief and shoulder function at a mean 12.6 months follow up. It is a quick, safe and a minimally invasive procedure that is suitable for elderly patients with irreparable cuff tears and medical co-morbidities.

Project description:PurposeTo compare the cellular viability and differentiation potential of subacromial bursa-derived cells (SBDCs) located over the rotator cuff muscle and tendon of patients undergoing primary versus revision arthroscopic rotator cuff repair (ARCR).MethodsSubacromial bursa was harvested from 18 primary (57.1 ± 4.6 years) and 12 revision ARCRs (57.3 ± 6.7 years). Bursa was collected from 2 sites (over rotator cuff tendon and muscle), digested with collagenase, and grown in culture. The number of nucleated cells, colony-forming units (CFUs), differentiation potential, and mesenchymal stem cell surface markers were compared in primary and revision cases.ResultsThere was no difference in the number of nucleated cells between primary and revision ARCR harvested from the subacromial bursa overlying the tendon (3019.3 ± 1420.6 cells/mg and 3541.7 ± 2244.2 cells/mg, respectively; P = .912) or muscle (2753.5 ± 1547.1 cells/mg and 2989.0 ± 2231.4 cells/mg, respectively; P = .777). There was no difference in the number of CFUs between primary and revision ARCR over the rotator cuff tendon (81.5 ± 49.5 CFUs and 53.0 ± 36.9 CFUs, respectively; P = .138), but there were significantly fewer CFUs over the muscle in revision cases (28.1 ± 22.7 CFUs) compared with primary cases (55.7 ± 34.5 CFUs) (P = .031). SBDCs from revision ARCR expressed characteristic mesenchymal stem cell surface epitopes and had multidifferentiation potentials for chondrogenesis, osteogenesis, and adipogenesis.ConclusionsSBDCs harvested over the rotator cuff muscle demonstrated significantly decreased colony-forming abilities in revision arthroscopic rotator cuff repairs compared with primary repairs. However, the subacromial bursa retains its pluripotent differentiation potential for chondrogenic, osteogenic, and adipogenic lineages in the revision setting.Clinical relevanceThe subacromial bursa may play a role in the healing response of the repaired rotator cuff. This capacity is not necessarily diminished in the revision setting and may be harnessed as an orthobiologic.

Project description:Objectives: While short and mid-term clinical outcomes following implantation of an arthroscopic subacromial balloon spacer for massive, irreparable rotator cuff tears (MIRCTs) have been favorable [1], little is known about the effects of concomitant procedures on clinical outcomes and early post- operative recovery. The purpose of this study was to determine the effects of concomitant proximal biceps surgery on short and mid-term outcomes following partial rotator cuff repair or subacromial balloon spacer implantation using the InSpace? device (Stryker; Kalamazoo, MI; Figure 1). Methods: We conducted a retrospective review of prospectively collected data from a previously published randomized, clinical trial comparing the InSpace? device to partial rotator cuff repair in the management of symptomatic MIRCTs (ClinicalTrials.gov Identifier: NCT02493660) [1]. Study participants with posterosuperior MIRCTs (as defined by MRI diagnosis of ≥2 tendon involvement and ≥5 cm of retraction from the tendon insertion) treated operatively with subacromial balloon spacer implantation or partial rotator cuff repair and concomitant biceps tenotomy or tenodesis were considered for this study. The primary outcome in this study was the achievement of minimal clinically important difference (MCID) and substantial clinical benefit (SCB) for the American Shoulder and Elbow (ASES) score at 6 weeks and 24 months postoperatively. Established MCID and SCB thresholds from the literature were used, requiring a ≥11.1-point increase in ASES score for MCID achievement and a ≥17.5-point increase for SCB achievement [2]. Fisher’s exact test was used to compare MCID and SCB achievement rates between groups. Results: A total of 103 patients were included in this analysis, of which 48 patients were in the InSpace? cohort and 55 were in the partial rotator cuff repair cohort (Table 1). At 6 weeks post-operatively, a larger percentage of patients who received InSpace? with concomitant biceps tenotomy achieved MCID on ASES compared to those receiving a concomitant tenodesis, though this result was not statistically significant (64.3% vs 42.1%, p = 0.15) (Table 1). Similarly, a larger percentage of patients who underwent arthroscopic partial rotator cuff repair with biceps tenotomy achieved MCID on ASES compared to those undergoing partial repair with biceps tenodesis, though this was not statistically significant (56.3% vs 40.9%, p = 0.41). Similar trends were seen for SCB achievement rates at 6 weeks (Table 2). Notably, SCB achievement rates were significantly greater for patients undergoing InSpace? with biceps tenotomy versus partial repair with biceps tenodesis (p = 0.04). At 24 months, ASES MCID achievement rates for the InSpace? with biceps tenotomy group were similar to the InSpace? with biceps tenodesis group (96.2% vs 86.7%, p = 0.54) (Table 1). Similarly, there was no significant difference between the partial repair with concomitant tenodesis and tenotomy groups (100% vs 92.9%, p = 0.51). Similar trends were seen for SCB achievement rates at this time point (Table 2). Notably, there was no longer a significant difference in SCB achievement rates between the InSpace? with biceps tenotomy group and partial repair with biceps tenodesis group (p = 1.00). Conclusions: The primary goal of treatment during arthroscopic implantation of a subacromial balloon spacer is pain relief in the setting of relatively well-maintained function. Although all patients in this study received standardized post-operative rehabilitation, including 4-week sling use, our results suggest that providers seeking accelerated rehabilitation for their patients may consider concomitant biceps tenotomy for biceps pathology to avoid prolonged immobilization, decrease risk of stiffness, and provide earlier achievement of clinically significant outcomes on patient-reported outcome measures.

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Subacromial spacer placement for protection of rotator cuff repair.

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Subacromial spacer placement for protection of rotator cuff repair.

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