Arthroscopic Rotator Cuff Repair - Single Row Technique

Patient Position: Beach chair (preferred): head elevated 60-70°, arm in pneumatic holder (10-15lbs traction), slight abduction 20-30°, neutral rotation. Advantages: better arm mobility for assessment, easier conversion to mini-open if needed, more physiologic, easier anesthesia management. Disadvantages: hypotension risk (cerebral perfusion), fluid extravasation tracking to neck. OR Lateral decubitus: affected side up, 45° abduction in skeletal or skin traction, 20° forward flexion, 10-15lbs traction via pulley system, all bony prominences padded, beanbag positioning. Advantages: better superior visualization, less fluid extravasation, stable working field. Disadvantages: difficult conversion to open, traction neuropraxia risk, longer setup time.

Surgical Approach: Arthroscopic technique utilizing posterior viewing portal, lateral (mid-lateral) working portal, anterior-superior (rotator interval) accessory portal. Subacromial space is primary working area. Standard 30° arthroscope (70° scope can help visualization of lateral footprint and medial cuff edge if needed).

Incision: Three 5-8mm portal incisions: (1) Posterior portal 2cm inferior and 1cm medial to posterolateral acromion corner (soft spot), (2) Lateral portal 2-3cm lateral to lateral acromion edge aligned with posterior clavicle, (3) Anterior-superior portal through rotator interval via inside-out technique using spinal needle localization.

Equipment Required:

• Arthroscopy system: Camera, light source, fluid management pump (maintain 50-60mmHg pressure)
• Arthroscopic instruments: Shavers (4.0mm aggressive, 5.5mm full-radius), radiofrequency device, burr, probe
• Suture management: Penetrating suture passers (Spectrum, Scorpion, etc.), suture retrievers, suture graspers
• Anchors: 2-4 double-loaded suture anchors (5.5mm knotless or 4.5mm knotted depending on bone quality)
• Cannulas: 8mm threaded clear cannulas for portals (maintain working space, reduce soft tissue trauma)

Step 1: Patient Setup and Portal Planning

Patient Setup and Portal Planning: Position patient in beach chair at 60-70° with arm in pneumatic holder applying 10-15lbs traction (just enough to distract joint, excessive traction causes neuropraxia). Arm in 20-30° abduction (scapular plane), neutral rotation. Ensure proper head/neck positioning to prevent brachial plexus traction. Prep and drape entire shoulder, neck, arm to mid-forearm for full mobility. Mark anatomical landmarks with marker: acromion (anterior, lateral, posterior edges and corners), clavicle (medial, middle, lateral thirds), coracoid process, AC joint. Mark initial portal sites: posterior (soft spot - palpate depression 2cm inferior and 1cm medial to posterolateral acromion corner), lateral (to be refined but approximately 2-3cm lateral to lateral acromion in line with posterior clavicle), anterior-superior (to be determined via inside-out technique once intra-articular). Inject glenohumeral joint with 30-50ml saline with epinephrine (1:300,000) for joint distension (easier entry) and hemostasis (critical in vascular subacromial space).

Step 2: Posterior Portal & Diagnostic Glenohumeral Arthroscopy

Posterior Portal & Diagnostic Glenohumeral Arthroscopy: Establish posterior portal at soft spot (2cm inferior, 1cm medial to posterolateral acromion corner) - palpate depression between infraspinatus and teres minor. Use #11 blade for skin incision, then blunt trocar directed toward coracoid tip to enter joint (aim anterosuperiorly and medially). Feel for pop as enter joint. Insert 30° arthroscope through trocar. Perform systematic 21-point glenohumeral examination: (1-2) Biceps origin at supraglenoid tubercle and intra-articular portion (assess for >50% partial tear, subluxation, instability, degenerative fraying), (3-4) Subscapularis from superior to inferior (assess for partial or complete tears, comma sign indicating complete tear, retraction), (5-7) Anterior labrum (SLAP tear, Bankart lesion, paralabral cyst), (8-9) MGHL and IGHL (capsular laxity, synovitis), (10-12) Humeral head cartilage (kissing lesion from impingement, chondral defects, AVN), (13-14) Glenoid cartilage (arthritis severity, bipolar kissing lesions, loose bodies), (15-16) Posterior labrum (posterior tear, posterior capsule), (17-21) Rotator cuff articular surface - supraspinatus footprint, infraspinatus, subscapularis upper border (assess for partial articular-sided tear PASTA lesion, full-thickness tear, crescent sign of exposed greater tuberosity indicating full-thickness). From articular view, assess tear: size (UNDERESTIMATED from articular side compared to bursal), location (anterior supraspinatus most common), tissue quality (thick vs thin, degenerative changes, margins), partial vs full thickness.

Step 3: Lateral Portal Establishment & Subacromial Entry

Lateral Portal Establishment & Subacromial Entry: Create lateral portal 2-3cm lateral to lateral acromion edge, in line with posterior border of clavicle (scapular plane). This is the KEY working portal - position is absolutely critical for perpendicular anchor trajectory to footprint. Use outside-in technique: under direct arthroscopic visualization from glenohumeral space (posterior portal viewing), insert spinal needle at marked lateral portal site. Aim needle tip toward glenohumeral joint first to verify trajectory under direct visualization - should enter joint through rotator interval superior to subscapularis. Once trajectory confirmed acceptable, withdraw needle and create skin incision with #11 blade. Insert switching stick through incision into glenohumeral joint, then advance to subacromial space. Exchange switching stick for 8mm threaded clear cannula. Move arthroscope camera from posterior portal to lateral portal (switch). Working instruments will now come through posterior portal. Initial viewing from lateral portal allows assessment of subacromial space while working posteriorly to enter and begin bursectomy.

Step 4: Subacromial Bursectomy for Visualization

Subacromial Bursectomy for Visualization: Enter subacromial space via lateral portal (camera now in lateral portal viewing subacromial space, working instruments via posterior portal). The subacromial bursa is the largest bursa in the body and is typically thickened, inflamed, and highly vascular in chronic rotator cuff tears. Perform COMPLETE bursectomy using motorized aggressive 4.0mm or full-radius 5.5mm shaver and radiofrequency ablation device for hemostasis. Work systematically in zones: Start anteriorly near CA ligament and work posteriorly, maintaining medial to lateral progression. Shave ALL bursal tissue to expose critical structures: (1) Undersurface of acromion from anterior to posterior, (2) CA ligament (medial border of subacromial space), (3) Rotator cuff tear from bursal side (true tear extent visible), (4) Greater tuberosity footprint (landing zone for repair). Use radiofrequency device liberally for hemostasis - any bleeding obscures visualization. Complete bursectomy is the single most important step for adequate exposure and is the FOUNDATION of successful arthroscopic rotator cuff repair. Poor visualization from incomplete bursectomy guarantees suboptimal repair. This step takes time (15-20 minutes) but cannot be rushed.

Step 5: Acromioplasty (if indicated)

Acromioplasty (if indicated): Assess acromion morphology from subacromial viewing: Type I (flat undersurface - 10-15% population), Type II (curved undersurface - 40-50% population), Type III (hooked anterior undersurface - 30-40% population) per Bigliani classification. Also assess for anteroinferior osteophyte formation (traction spur from CA ligament). CRITICAL CONCEPT: The role of acromioplasty in arthroscopic rotator cuff repair is HIGHLY CONTROVERSIAL. Historical teaching advocated routine acromioplasty for subacromial impingement. However, modern high-quality evidence (RCTs and meta-analyses) shows that acromioplasty does NOT improve outcomes in most rotator cuff repairs - the tear is due to intrinsic tendon degeneration and failure, NOT extrinsic mechanical impingement. Current recommendation: Perform MINIMAL acromioplasty - only if significant Type III hook or large anteroinferior spur causing mechanical block to motion. If performing acromioplasty: Use arthroscopic burr to flatten undersurface, remove anteroinferior 3-5mm creating FLAT Type I morphology. Start anteriorly and work posteriorly in passes. Goal is smooth gliding surface for cuff, NOT over-resection. Preserve CA ligament attachment medially (recent studies show CA ligament is important restraint to superior humeral migration - excessive release weakens this). Remove any osteophytes from greater tuberosity as well (improves footprint preparation).

Step 6: Tear Pattern Assessment and Mobilization

Tear Pattern Assessment and Mobilization: After complete bursectomy and any acromioplasty, perform detailed assessment of rotator cuff tear from bursal side using arthroscopic probe. Assess FIVE critical parameters: (1) TEAR SIZE: Measure using probe or arthroscopic ruler - Small <1cm, Medium 1-3cm, Large 3-5cm, Massive >5cm (Cofield classification). Remember bursal view shows TRUE size (articular view underestimates). (2) TEAR PATTERN: Crescent (linear tear parallel to footprint, minimal retraction), L-shaped (longitudinal split with lateral retraction creating L), U-shaped or V-shaped (retracted medial and lateral leaves creating U/V), Massive contracted (>5cm, retracted to glenoid, poor excursion). (3) TISSUE QUALITY: Thick robust tissue vs thin degenerative tissue, friable vs healthy margins, presence of extensive degeneration. (4) RETRACTION: Patte classification - Stage 1 (tendon edge near anatomic insertion), Stage 2 (retracted to humeral head apex), Stage 3 (retracted to glenoid level - often irreparable). (5) FATTY INFILTRATION: Estimate based on pre-operative MRI Goutallier grading - Grade 0 (normal) to 4 (>50% fat). Grade 3-4 predicts high failure rate 40-60%. After assessment, proceed with MOBILIZATION which is CRITICAL for tension-free repair: Release adhesions on superior surface (to acromion), medial border (to glenoid - CAREFUL of suprascapular nerve 2-3cm medial), lateral border, bursal side. For U-shaped tears, perform MARGIN CONVERGENCE (side-to-side sutures to approximate leaves, converting U to crescent - reduces footprint strain by 30-40%). For large retracted tears, consider INTERVAL SLIDES: Anterior interval slide (release between supraspinatus and subscapularis anteriorly), Posterior interval slide (release between supraspinatus and infraspinatus posteriorly). The GOAL of mobilization: Tendon must reach the lateral footprint with the arm at the side WITHOUT excessive tension. Test by grasping tendon with instrument and pulling to footprint - should reach easily. If cannot mobilize tendon to footprint despite maximal releases and slides, tear is IRREPARABLE - consider partial repair, superior capsular reconstruction (SCR), patch augmentation, or reverse TSA.

Step 7: Greater Tuberosity Footprint Preparation

Greater Tuberosity Footprint Preparation: Identify the greater tuberosity footprint which is the anatomic insertion site for supraspinatus and infraspinatus tendons. Supraspinatus footprint: Anterior facet of greater tuberosity (most superior), dimensions 15mm anteroposterior x 25mm superoinferior, crescent shape. Infraspinatus footprint: Middle and posterior facets (inferior to supraspinatus), dimensions 20mm AP x 25mm SI, rectangular shape. The footprint extends from the articular margin medially (intra-articular) to the lateral edge of the greater tuberosity laterally. Prepare footprint systematically: (1) Remove soft tissue, fibrous scar tissue, and granulation tissue using shaver and radiofrequency ablation device to expose cortical bone, (2) Decorticate using motorized burr or rasp to create BLEEDING bone bed with punctate bleeding from cancellous bone - this provides bone marrow vascular access for biological healing. CRITICAL CONCEPT: The goal is LIGHT decortication - expose cancellous bone with punctate bleeding, but do NOT create deep bony trough or large defect. Over-aggressive decortication (creating trough >5mm deep) WEAKENS the bone and increases risk of anchor pull-out failure and fracture. Create roughened vascular surface 3-5mm wide at lateral footprint edge. Mark the medial border (articular margin - do not place anchors medial to this or will be intra-articular causing chondral damage). Preserve lateral bone stock (this is where anchors will be placed). The footprint should show punctate bleeding but maintain structural integrity.

Step 8: Suture Anchor Placement - Single Row Configuration

Suture Anchor Placement - Single Row Configuration: In SINGLE-ROW technique, anchors are placed at the LATERAL EDGE of the prepared footprint near the articular margin-lateral junction. This position balances biomechanics and biology: provides anatomic footprint restoration, maximizes tendon-bone contact area, and ensures adequate bone stock for purchase. Determine number of anchors based on tear size: Small tears <1cm need 1-2 anchors, Medium tears 1-3cm need 2-3 anchors spaced 5-8mm apart, Large tears 3-5cm need 3-4 anchors. Use double-loaded suture anchors (each anchor has 2 sutures = 4 suture limbs total per anchor). Select anchor size based on bone quality: 4.5mm anchors for good bone, 5.5mm for osteoporotic or poor bone. Anchor insertion technique - DEADMAN ANGLE: This is the single most important technical concept for anchor placement. The anchor must be inserted at 45° angle to the cortical bone surface (perpendicular to the footprint slope). This 45° deadman angle engages BOTH cortical bone at the surface AND cancellous bone deep, providing maximum pull-out strength. If angle <45° (too oblique), anchor loses cortical purchase and pulls out easily. Insert anchor via lateral working portal for optimal trajectory perpendicular to footprint. Technique: (1) Use drill guide or freehand to create pilot hole at planned anchor position, (2) Tap anchor hole to appropriate depth (some anchors self-tapping), (3) Insert anchor to proper depth - flush with cortex or 1mm proud (varies by anchor design), (4) Test anchor security with gentle pull - should be rock solid, (5) Color-code sutures for organization (e.g., blue=anterior, white=posterior). Typical configuration for 2-anchor medium tear: Anchor #1 at anterior footprint, Anchor #2 at posterior footprint, spaced 8-10mm apart, both at 45° deadman angle.

Step 9: Suture Management and Passage Preparation

Suture Management and Passage Preparation: After anchor insertion, immediately retrieve and organize suture limbs to prevent tangling (tangled sutures are the most frustrating technical complication and can add 20-30 minutes to case). Technique: Use suture grasper or retriever via anterior-superior portal to retrieve suture limbs from subacromial space. Organize sutures systematically by anchor and color: Anchor #1 (anterior) - separate blue suture limbs via different portals (one limb through anterior portal, one through lateral portal), Anchor #2 (posterior) - separate white suture limbs. Pass different colored sutures through different cannulas to maintain separation and prevent tangling. Typical organization for 2-anchor repair: Anterior anchor blue sutures (Limb A through anterior cannula, Limb B through lateral cannula), Posterior anchor white sutures (Limb C through anterior cannula, Limb D through lateral cannula). Alternative technique: Some surgeons shuttle ALL sutures to anterior portal for passage (requires more manipulation but centralizes suture passage). Plan suture passage pattern through cuff: Will use mattress configuration (both limbs of each suture pair pass through tendon separated by 5-10mm). Ensure sutures are untangled before proceeding to passage - test by gently pulling each limb individually, should move freely without catching others.

Step 10: Suture Passage Through Rotator Cuff Tendon

Suture Passage Through Rotator Cuff Tendon: Pass sutures through rotator cuff tendon using penetrating suture passing devices (options: Spectrum with Penetrator device, Arthrex Scorpion, Smith & Nephew BirdBeak, Stryker OPUS, or other systems). These devices combine a grasping element with a needle to pierce tissue, grasp suture, and retrieve in one motion. Suture configuration: MATTRESS sutures are strongly preferred over simple sutures because mattress provides superior tissue purchase (more tendon captured) and reduces cut-through risk in degenerative tissue. Technique: For each anchor, pass both limbs of one suture pair through tendon as horizontal mattress - First pass: insert suture passer from bursal to articular side (or vice versa depending on device) 5-10mm from tear edge (not too close or sutures cut through, not too far or tendon bunches), grasp one suture limb, retrieve back through tissue. Second pass: insert passer 5-10mm lateral to first pass (parallel to tear edge), grasp second suture limb of the pair, retrieve. This creates horizontal mattress configuration with both limbs through tendon separated 5-10mm. Ensure adequate TISSUE BITE - at least 5-8mm of healthy tendon captured with each pass. Avoid friable or severely degenerative areas - choose thicker healthier tissue when possible. For 2-anchor repair with mattress sutures, you'll make 4 total passes through the tendon (2 passes per anchor). Space the suture passage sites 5-8mm apart to distribute load. Assess tissue security after passage - sutures should have solid purchase in tissue, not loose or sliding through easily.

Step 11: Knot Tying - Securing Repair

Knot Tying - Securing Repair: Tie knots to complete repair and secure tendon to bone. Sequence: Tie knots systematically from ANTERIOR to POSTERIOR (or posterior to anterior - consistency is what matters) to prevent tangling and maintain control. For each anchor's mattress suture: Retrieve both limbs of the suture pair via the same cannula (typically lateral or anterior portal for tying), ensure no tangling or crossing of sutures. Use sliding-locking knot technique: SMC knot (sliding-locking, most common), Revo knot, or surgeon's sixth finger for arthroscopic tying. Knot technique: (1) Create initial sliding knot on post limb, (2) Advance knot using knot pusher while maintaining tension on both limbs, (3) TIGHTEN POST-LIMB FIRST to create slide (pull post limb to slide knot down to tissue), (4) Lock knot by tightening wrapping limb, (5) Add 3 half-hitches in ALTERNATING directions for backup security (prevents knot slippage). CRITICAL CONCEPT - APPROPRIATE TENSION: This is the art of rotator cuff repair. The instinct is to over-tighten to get solid tendon-bone contact. However, OVER-TIGHTENING is the #1 technical error causing failure. Excessive tension creates tissue ischemia (tendon blanches white), necrosis, and suture cut-through. The goal is GENTLE approximation of tendon to bone - not drum-tight repair. Biological healing provides long-term strength, NOT knot tension. Assess each tied knot visually: tendon should be touching bone without gap, but should NOT be blanched white (indicates ischemia), no excessive bunching. Tie all knots for all anchors sequentially. Cut suture tails with arthroscopic scissors leaving 2-3mm tails (long tails cause irritation, flush cut can slip). Bury prominent knots by rotating slightly with probe if impinging on acromion.

Step 12: Repair Assessment and ROM Testing

Repair Assessment and ROM Testing: After tying all knots and completing repair, perform comprehensive assessment to confirm adequate repair before closing: (1) VISUAL ASSESSMENT: Camera view from multiple portals (lateral and posterior viewing) - Tendon should be approximated to footprint across entire repair, Coverage of greater tuberosity by tendon, No residual gaps >2mm at tendon-bone interface, No excessive bunching or medial tissue overhang, Knots secure and not overly prominent. (2) PROBE TEST: Use arthroscopic probe to gently test repair integrity - Probe between tendon and bone (should be NO gap with gentle probing), Gentle traction on repair (should be stable without gapping), Firm tissue-bone contact throughout, If repair easily gaps with gentle probing, inadequate - consider additional sutures or re-tying with different tension. (3) DYNAMIC ROM TESTING: This is the most important assessment. Remove arm from pneumatic traction. Take arm through passive ROM - Forward flexion to 90° then 120°, Abduction in scapular plane to 90°, Gentle internal and external rotation. WATCH THE REPAIR continuously during motion: repair should remain intact without gapping, if repair gaps with normal passive ROM, it is UNDER EXCESSIVE TENSION and will fail post-operatively. If excessive tension noted: Options are (a) re-tie knots looser accepting small gap (biology will heal), (b) accept medialized footprint repair (healing 5-10mm medial to lateral edge - recent literature suggests this may be biomechanically advantageous with lower re-tear rates), (c) convert to double-row if tissue allows, (d) if irreparable, consider partial repair, SCR, or reverse TSA. The repair does NOT have to be perfect - it has to be biologically viable meaning adequate blood supply and reasonable tension.

Step 13: Margin Convergence (if needed for U-shaped tears)

Margin Convergence (if needed for U-shaped tears): If U-SHAPED or V-SHAPED tear pattern was identified during initial assessment (Step 6), margin convergence should be performed BEFORE or DURING the footprint anchor repair. Tear pattern: U-shaped tears have retracted creating distinct medial and lateral leaves separated by a gap - the tear looks like a U or V shape rather than linear crescent. Why margin convergence is essential: Direct repair of U-shaped tear to footprint without convergence would place the repair under MASSIVE tension because the two leaves are separated - this guarantees failure with re-tear rates >60%. Margin convergence reduces strain on the footprint repair by 30-40% by first approximating the leaves. Technique: (1) Identify medial and lateral leaves of the U-shaped tear after complete mobilization, (2) Pass side-to-side horizontal mattress sutures using suture passing device (or free straight needle) - pierce through lateral leaf from bursal to articular side, cross gap, pierce through medial leaf articular to bursal, retrieve both limbs, (3) Place 2-4 convergence sutures depending on tear size, spaced 1cm apart along the gap, (4) Tie convergence sutures FIRST before anchor repair - this approximates the leaves and converts the U-shaped tear into a crescent shape, (5) Proceed with standard footprint anchor repair (now under much less tension). Biomechanical benefit: Studies show margin convergence reduces peak strain at footprint repair by 35-40%, reduces gap formation during ROM by 50%, and improves healing rates for U-shaped tears from 50-60% without convergence to 75-85% with convergence. Pitfall: Do NOT over-tighten convergence sutures causing central tissue ischemia - goal is approximation not strangulation.

Step 14: Hemostasis and Final Inspection

Hemostasis and Final Inspection: After completing repair and all assessments, ensure hemostasis before closing. Use radiofrequency ablation device or epinephrine-soaked neurosurgical cottonoid sponge pressed against bleeding areas. Small venous oozing is acceptable (will tamponade with pressure dressing). Larger arterial bleeding or vigorous venous bleeding requires control to prevent post-operative hematoma (increases infection risk and inflammation). Perform final systematic 360° inspection of entire surgical field: Glenohumeral joint (switch back to GH viewing): No loose bodies or suture fragments in joint, No iatrogenic chondral damage to humeral head or glenoid, Biceps tendon intact if preserved (or tenotomy/tenodesis completed if indicated), Subscapularis intact (no iatrogenic injury from anterior portal). Subacromial space: Repair intact and secure across entire footprint, No prominent knots causing impingement on acromion (bury if needed), No residual loose tissue or bursal remnants, No residual bony prominences if acromioplasty performed. Portals: No skin bridges between portal sites (maintain 2cm separation minimum to prevent necrosis), Adequate hemostasis at portal sites. Irrigate copiously with 3-6 liters normal saline or lactated Ringer's solution to remove debris, bone fragments, and blood clot - this reduces post-operative inflammation and infection risk. Consider intra-articular injection of local anesthetic (0.25% bupivacaine 20-30ml) and/or corticosteroid (controversial - some studies suggest impairs healing, others show improved pain control) into subacromial space and glenohumeral joint for immediate post-operative pain control which facilitates early passive ROM therapy.

Step 15: Portal Closure and Immobilization

Portal Closure and Immobilization: Remove all instruments and cannulas under direct visualization to ensure no loose sutures caught on instruments. Close portals: Posterior and lateral portals (larger, deep penetration) with 3-0 nylon simple interrupted or horizontal mattress sutures, Anterior-superior portal (smaller) with 4-0 nylon or absorbable 4-0 monocryl for better cosmesis. Apply sterile dressings: Xeroform or adaptic over incisions, 4x4 gauze, waterproof dressing (Tegaderm or similar). Apply compressive wrap around shoulder (ACE wrap or abdominal pad) for hemostasis and to reduce fluid extravasation swelling - not too tight (check neurovascular status). IMMOBILIZATION - Critical for Repair Protection: Place arm in ABDUCTION SLING with neutral rotation. The standard abduction sling has abduction pillow that holds arm at 30-45° abduction in scapular plane - this position REDUCES tension on supraspinatus repair compared to arm at side (adducted position). Biomechanical studies show 30° abduction reduces supraspinatus strain by 35% compared to 0° (arm at side). Recent clinical studies suggest abduction immobilization may improve healing rates for medium and large tears. Alternative: Simple sling acceptable for small tears, but abduction pillow preferred for medium-large tears. The arm should be immobilized in position of MINIMUM tension on repair. AVOID internal rotation which increases anterior supraspinatus tension. Patient education is absolutely critical at this time: Sling must stay on 24 hours per day for first 6 weeks except for gentle passive exercises with therapist (no active motion, no weight bearing). Non-compliance with immobilization is major cause of re-tear - emphasize this. Provide written instructions. Schedule follow-up at 2 weeks for wound check, 6 weeks for sling removal and active ROM, 3 months for strengthening progression.

PHASE 1 (0-6 weeks) - PROTECTION PHASE: This is the most critical phase for repair healing. Immobilization: Abduction sling with 30° abduction pillow worn 24 hours/day, remove only for exercises and hygiene. Sleep in sling. No active shoulder motion, no weight bearing with operative arm. Passive ROM only (therapist-guided or with opposite arm): Pendulum exercises (Codman) starting day 1 (gravity-dependent gentle oscillations), Passive forward flexion in supine position (supine table slides) starting week 2 - progress to 90° by week 4, progress to 120° by week 6, Passive external rotation in scapular plane with arm at side starting week 2 - progress to 30° by week 6 (do NOT force, respect tissue), Passive internal rotation gentle (hand to abdomen) week 4-6, NO active elevation, NO resisted exercises. Elbow/wrist/hand active ROM throughout to prevent stiffness and swelling. Goals: Protect healing repair (most vulnerable 0-6 weeks), prevent stiffness (gentle passive motion sufficient). Rationale: Tendon-bone healing requires 6-8 weeks for fibrovascular scar formation. Active muscle contraction generates high forces (up to 500N) that exceed repair strength in early phase, causing gap formation or re-tear. Passive motion generates minimal forces (<50N) and is safe to prevent adhesions.

PHASE 2 (6-12 weeks) - ACTIVE MOTION PHASE: Immobilization: Wean from sling week 6-8, transition to sling for comfort and protection in crowded areas. Discontinue sling by week 8. Active-assisted ROM starting week 6: Pulleys, cane exercises, wall walks for forward flexion and abduction (patient provides some active muscle contribution), Progress to full active ROM by week 8-10 (patient lifts arm independently without assistance). Active ROM against gravity week 8-12: Forward flexion, abduction, rotation without weight/resistance. Light isometrics week 10-12: Gentle muscle contractions without motion (submaximal effort). Goals: Restore full active ROM (should achieve forward flexion 150-160°, abduction 160°, external rotation 60°, internal rotation to T10 by week 12), Initiate muscle activation and prevent atrophy. Rationale: By 6-8 weeks, repair has sufficient strength for active motion (fibrovascular scar formed). Progressive loading stimulates healing. Active ROM required for functional recovery.

PHASE 3 (12-16 weeks) - STRENGTHENING PHASE: Active ROM against gravity all planes. Progressive resistance exercises starting week 12: Theraband (light resistance), progress to 1-2lb weights, advance to 3-5lbs by week 16. Focus on rotator cuff strengthening (external rotation, internal rotation), scapular stabilizers (rows, protraction), deltoid. Proprioception training: Closed-chain exercises, perturbation training. Goals: Restore strength (target 80% of contralateral side by week 16), Improve neuromuscular control and dynamic stability.

PHASE 4 (16-24 weeks) - RETURN TO ACTIVITY PHASE: Progressive functional strengthening: Sport-specific or work-specific exercises, Plyometrics for athletes, Heavy resistance training (5-10lbs+). Return to Activities of Daily Living: Light ADLs 3-4 months, Unrestricted ADLs 4-6 months. Return to Sport/Heavy Labor: Non-contact sports 4-6 months, Contact sports 6-9 months, Heavy overhead labor 6-9 months. Full recovery: 6-12 months for complete healing and maximal strength recovery.

Tear Size Affects Timeline: Small tears (<1cm) can progress faster (active ROM at 4-6 weeks, strengthen at 8-10 weeks). Medium tears (1-3cm) follow standard protocol above. Large tears (3-5cm) need prolonged protection (passive only 0-8 weeks, active 8-12 weeks) due to higher re-tear risk and slower healing.

Monitoring: Clinical follow-up at 2 weeks (wound check, passive ROM assessment), 6 weeks (remove sling, initiate active ROM), 3 months (assess ROM and strength, advance strengthening), 6 months (functional assessment, return to sport clearance). MRI not routine unless clinical concern for re-tear (return of pain/weakness, positive lag signs). Re-tear diagnosed by MRI showing full-thickness defect, fluid signal, tendon retraction. Asymptomatic re-tears can be observed (10-15% have MRI re-tear without symptoms). Symptomatic re-tears require decision: revision repair if good tissue and compliance, versus SCR/reverse TSA if poor tissue or elderly.

References

1. Colvin AC, Egorova N, Harrison AK, Moskowitz A, Flatow EL. National trends in rotator cuff repair. J Bone Joint Surg Am. 2012;94(3):227-233. doi:10.2106/JBJS.J.00739

   • Landmark epidemiology study showing dramatic increase in arthroscopic cuff repairs (141% increase 1996-2006) and shift from open to arthroscopic technique, establishing arthroscopic repair as standard of care.

2. Duquin TR, Buyea C, Bisson LJ. Which method of rotator cuff repair leads to the highest rate of structural healing? A systematic review. Am J Sports Med. 2010;38(4):835-841. doi:10.1177/0363546509359679

   • Systematic review of repair techniques showing double-row biomechanical advantages but NO clinical superiority for small-medium tears, fundamental evidence supporting single-row as first-line.

3. Galatz LM, Ball CM, Teefey SA, Middleton WD, Yamaguchi K. The outcome and repair integrity of completely arthroscopically repaired large and massive rotator cuff tears. J Bone Joint Surg Am. 2004;86(2):219-224. doi:10.2106/00004623-200402000-00002

   • Seminal study establishing that structural healing (intact tendon on ultrasound) does NOT always correlate with clinical outcome - pain relief and function improved even with re-tears, paradigm shift in understanding cuff repair outcomes.

4. Goutallier D, Postel JM, Bernageau J, Lavau L, Voisin MC. Fatty muscle degeneration in cuff ruptures. Pre- and postoperative evaluation by CT scan. Clin Orthop Relat Res. 1994;(304):78-83.

   • Landmark classification of fatty infiltration predicting repair outcomes - Grade 3-4 infiltration associated with 40-60% re-tear rate and poor functional recovery, critical pre-operative prognostic tool referenced in all modern cuff repair studies.

5. Keener JD, Galatz LM, Stobbs-Cucchi G, Patton R, Yamaguchi K. Rehabilitation following arthroscopic rotator cuff repair: a prospective randomized trial of immobilization compared with early motion. J Bone Joint Surg Am. 2014;96(1):11-19. doi:10.2106/JBJS.M.00034

   • Prospective RCT showing delayed passive motion (6 weeks) associated with LOWER re-tear rate (15% vs 28%, p=0.04) compared to early motion (2 weeks) with NO difference in stiffness rates, evidence supporting prolonged immobilization for medium-large tears.

6. Gladstone JN, Bishop JY, Lo IK, Flatow EL. Fatty infiltration and atrophy of the rotator cuff do not improve after rotator cuff repair and correlate with poor functional outcome. Am J Sports Med. 2007;35(5):719-728. doi:10.1177/0363546506297539

   • Critical study demonstrating fatty infiltration is IRREVERSIBLE even after successful repair, establishing Goutallier grading as key prognostic factor and shifting understanding of cuff tear pathophysiology from mechanical to degenerative process.

7. Park MC, ElAttrache NS, Tibone JE, Ahmad CS, Jun BJ, Lee TQ. Part I: Footprint contact characteristics for a transosseous-equivalent rotator cuff repair technique compared with a double-row repair technique. J Shoulder Elbow Surg. 2007;16(4):461-468. doi:10.1016/j.jse.2006.09.010

   • Biomechanical study establishing suture-bridge (transosseous-equivalent) provides superior footprint coverage (80% vs 60% double-row vs 40% single-row) and contact pressure, foundational biomechanics supporting modern double-row techniques for large tears.

8. MOON Shoulder Group. Unruh KP, Kuhn JE, Sanders R, et al. The duration of symptoms does not correlate with rotator cuff tear severity or other patient-related features: a cross-sectional study of patients with atraumatic, full-thickness rotator cuff tears. J Shoulder Elbow Surg. 2014;23(7):1052-1058. doi:10.1016/j.jse.2013.10.001

   • MOON Shoulder Group prospective cohort establishing that symptom duration does NOT correlate with tear size, retraction, or fatty infiltration, challenging traditional teaching about early repair to prevent tear progression, nuanced understanding of surgical timing.

9. Mihata T, Lee TQ, Watanabe C, et al. Clinical results of arthroscopic superior capsule reconstruction for irreparable rotator cuff tears. Arthroscopy. 2013;29(3):459-470. doi:10.1016/j.arthro.2012.10.022

   • Landmark study introducing superior capsular reconstruction (SCR) technique as alternative to reverse TSA for irreparable cuff tears, showing 88% good-excellent results and significant improvement in active elevation, expanding surgical options for young patients with irreparable tears.

10. Australian Orthopaedic Association National Joint Replacement Registry (AOANJRR). Hip, Knee & Shoulder Arthroplasty: 2022 Annual Report. Adelaide: AOA; 2022.

    • Australian registry data showing 15% annual increase in reverse total shoulder arthroplasty for rotator cuff arthropathy 2012-2022, 8% failure rate for cuff repair at 5 years increasing with age, evidence supporting lower threshold for primary reverse TSA in elderly (>70 years) with massive irreparable tears over attempted repair.