Arthroscopic Rotator Cuff Repair - Double Row / Transosseous Equivalent (TOE) Suture Bridge Technique

Patient Position: Beach chair position (preferred): head elevated 60-70°, arm in pneumatic holder with 10-15lbs gentle traction, neutral rotation, 20-30° abduction allowing dynamic ROM testing. Alternative: lateral decubitus with arm in 45° abduction, 20° forward flexion, 10-15lbs traction.

Surgical Approach: Arthroscopic technique utilizing posterior viewing portal, lateral (mid-lateral) primary working portal, anterior-lateral and posterior-lateral accessory working portals for suture management. Subacromial space is primary surgical field.

Incision: Four 5-8mm portal incisions: (1) Posterior viewing portal: 2cm inferior, 1cm medial to posterolateral acromion corner, (2) Lateral working portal: 3cm lateral to lateral acromion edge in line with posterior clavicle (Nevasier), (3) Anterior-lateral portal: via rotator interval, (4) Posterior-lateral portal (accessory): for suture management and medial row visualization.

Step 1: Patient Setup, Portal Planning, and Glenohumeral Diagnostic Arthroscopy

Patient Setup, Portal Planning, and Glenohumeral Diagnostic Arthroscopy: Beach chair positioning: 60-70° upright, pneumatic holder with 10-15lbs traction, arm neutral rotation, 20-30° abduction. Prep and drape widely. Mark landmarks: acromion borders, clavicle, coracoid, spine of scapula. Inject joint with 30-50ml saline/epinephrine (1:300,000) for distension and hemostasis. Establish posterior portal at soft spot (2cm inferior, 1cm medial to posterolateral acromion). Insert 30° arthroscope. Systematic glenohumeral examination: biceps (greater than 50% tear or instability requires management), subscapularis (comma sign for tear), anterior/posterior labrum, articular cartilage, glenohumeral ligaments. Assess cuff from articular side: crescent sign (exposed tuberosity), tear margins, tissue quality. Document findings.

Step 2: Lateral Portal Establishment and Subacromial Space Entry

Lateral Portal Establishment and Subacromial Space Entry: Establish lateral portal using outside-in technique with spinal needle from glenohumeral space for orientation, then transition to subacromial space. Position: 3cm lateral to lateral acromion edge, in line with posterior clavicle (Nevasier portal). This provides optimal trajectory: perpendicular to footprint for medial AND lateral row anchor placement. Insert switching stick, then cannula. Camera remains in posterior portal for most of case (alternate to lateral for different viewing angles as needed). Lateral portal is the PRIMARY WORKING portal for anchor placement in double-row repair.

Step 3: Complete Subacromial Bursectomy and Visualization

Complete Subacromial Bursectomy and Visualization: Camera in posterior (or lateral) portal, shaver via lateral (or posterior) portal. Perform METICULOUS bursectomy - this is the foundation of the entire procedure. Systematically remove bursa: anterior to posterior, medial to lateral, superior to inferior. Work in quadrants. Use motorized shaver and radiofrequency device. Remove ALL bursal tissue until crisp visualization of: undersurface of acromion (smooth bone), coracoacromial ligament, entire cuff tear with anterior and posterior margins, greater tuberosity footprint, humeral head. The bursa is often thickened, inflamed, and adherent in chronic tears - requires patience. Switch camera between portals for complete visualization. Consider anterior-lateral accessory portal if needed for visualization.

Step 4: Acromioplasty Assessment and Minimal Decompression

Acromioplasty Assessment and Minimal Decompression: Assess acromion morphology using Bigliani classification: Type I flat (15%), Type II curved (70%), Type III hooked (15%). Modern evidence suggests acromioplasty does NOT improve outcomes in most cuff repairs. Perform MINIMAL acromioplasty ONLY if: significant Type III hook, large anteroinferior osteophyte causing mechanical impingement, evidence of outlet stenosis. Technique: use burr to flatten undersurface, remove 3-5mm anteroinferior acromion creating smooth surface. Work anterior to posterior. Goal: smooth gliding surface, NOT over-resection. Preserve deltoid origin. CA ligament management controversial: traditional teaching releases it, modern practice often preserves it as superior restraint. Remove osteophytes from greater tuberosity. In double-row repair, adequate subacromial space is important for the increased tendon bulk at repair site.

Step 5: Tear Pattern Assessment, Classification, and Mobilization Strategy

Tear Pattern Assessment, Classification, and Mobilization Strategy: With excellent visualization from complete bursectomy, assess tear from bursal side: TEAR SIZE (anteroposterior and mediolateral dimensions in cm), TEAR PATTERN (crescent, U-shaped, L-shaped, massive), TISSUE QUALITY (thick/thin, degenerative changes, friability), RETRACTION using Patte classification (Stage 1: near greater tuberosity, Stage 2: at humeral head apex, Stage 3: at glenoid level), MUSCLE QUALITY correlation with preoperative MRI Goutallier grading (0: normal to 4: greater than 50% fat). Use probe to assess mobility. Determine repair strategy: crescent tears = direct repair, U-shaped = margin convergence then repair, L-shaped = repair apex first (corner stitch) then margins. Plan need for releases and interval slides.

Step 6: Comprehensive Mobilization - The Key to Tension-Free Repair

Comprehensive Mobilization - The Key to Tension-Free Repair: Mobilization is THE MOST IMPORTANT TECHNICAL STEP. Goal: reduce tendon to footprint without tension. Systematic approach: (1) ADHESION RELEASE: release ALL adhesions between cuff and surrounding structures using elevator, shaver, and radiofrequency. Release medially (from glenoid), laterally (from deltoid), superiorly (from acromion/CA ligament). (2) CAPSULAR RELEASES if needed for chronic retracted tears: release superior capsule from glenoid, release posterior interval. Be careful: suprascapular nerve 2cm medial to glenoid. (3) INTERVAL SLIDES for large tears: anterior interval slide (between supraspinatus and subscapularis), posterior interval slide (between supraspinatus and infraspinatus). (4) MARGIN CONVERGENCE for U-shaped tears: side-to-side sutures approximate medial and lateral leaves. Test mobilization: with arm at side in neutral position, tendon should reach lateral footprint WITHOUT tension - this is the marker of adequate mobilization.

Step 7: Greater Tuberosity Footprint Preparation for Double-Row Fixation

Greater Tuberosity Footprint Preparation for Double-Row Fixation: Identify anatomic footprint: supraspinatus inserts on superior facet (anterior, approximately 15mm AP x 25mm SI), infraspinatus on posterior facet (approximately 20mm AP x 25mm SI). For double-row repair, prepare ENTIRE footprint: medial border at articular margin, lateral border at anatomic footprint edge (approximately 15-18mm lateral to articular margin). Remove soft tissue, scar, and residual cuff using shaver and radiofrequency. Decorticate to bleeding bone using burr or rasp: GENTLE decortication creating punctate bleeding, do NOT create large bony defect or trough. Over-decortication weakens bone for anchors. Create roughened surface for biological healing. Mark positions: MEDIAL ROW will be at articular margin (medial border), LATERAL ROW will be 10-15mm lateral at footprint edge. Preserve lateral bone stock.

Step 8: Medial Row Anchor Placement at Articular Margin

Medial Row Anchor Placement at Articular Margin: MEDIAL ROW: Place 2-3 double-loaded suture anchors (typically 2 for medium tears, 3 for large tears) at the MEDIAL BORDER of prepared footprint = articular margin (junction of articular cartilage and tuberosity bone). Space anchors 8-10mm apart spanning anterior to posterior. Insert via lateral portal using DEADMAN ANGLE: 45° to cortical surface, perpendicular to footprint. Anchor types: prefer KNOTLESS medial row anchors (faster, less bulk) OR standard suture anchors if tying. Tap pilot hole, insert anchor flush or 1mm below bone surface. Test security with gentle pull. Color-code sutures for organization (e.g., blue=anterior, white=middle, green=posterior). Retrieve suture limbs systematically - will have 8-12 suture limbs total from medial row.

Step 9: Suture Passage Through Cuff - Medial Row Mattress Configuration

Suture Passage Through Cuff - Medial Row Mattress Configuration: Pass medial row sutures through cuff tendon using penetrating suture passing device (Spectrum, Scorpion, Penetrator). Pass in MATTRESS configuration for superior tissue purchase compared to simple sutures. Technique: pass first limb from bursal to articular side 5-10mm from medial tear edge (not too close=cut-through), then pass second limb parallel 5mm lateral, creating horizontal mattress. Repeat for all medial row anchors. Each mattress captures approximately 8-10mm of tissue width. Space mattress sutures 8-10mm apart (matching anchor spacing). Ensure ADEQUATE TISSUE BITE: at least 5-8mm of tendon grasped. Retrieve sutures systematically and organize by color/anchor. For knotless medial row: pass sutures and secure anchors immediately. For knot-tying: pass all sutures first, then tie.

Step 10: Medial Row Knot Tying OR Knotless Fixation

Medial Row Knot Tying OR Knotless Fixation: OPTION A - KNOTLESS MEDIAL ROW (increasingly popular): After passing sutures through cuff, tension sutures pulling tendon medially to articular margin, then secure knotless anchors. Tension appropriately - not too tight. OPTION B - KNOT-TYING MEDIAL ROW (traditional): Retrieve both limbs of each mattress suture through same cannula. Tie using sliding-locking knot (SMC, Revo) with appropriate tension. Tighten post-limb first, then lock. Add 3 alternating half-hitches. Goal: secure medial edge of tendon to articular margin WITHOUT over-tensioning. Assess: medial edge should be at articular margin, no gap, no excessive blanching/bunching. The medial row fixation is FIRST layer - lateral row will add more fixation.

Step 11: Lateral Row Anchor Placement - Completing the Suture Bridge

Lateral Row Anchor Placement - Completing the Suture Bridge: LATERAL ROW: Place 2-3 KNOTLESS lateral row anchors at the LATERAL EDGE of footprint, 10-15mm lateral to medial row anchors. Position in line with medial row (anterior lateral row aligns with anterior medial row, etc). Insert via lateral portal at 45° deadman angle. Technique: First pass medial row suture tails (already through tendon) OVER or THROUGH the lateral tendon edge. Then insert lateral row knotless anchor capturing these sutures. As anchor inserts and deploys, it tensions the sutures creating SUTURE BRIDGE - sutures span from medial row (fixed to bone), through cuff, over lateral tendon edge, to lateral row (fixed to bone). This creates compression of entire tendon footprint contact area. Tension appropriate - sutures should be taut creating gentle compression, not over-tight.

Step 12: Suture Bridge Construct Completion and Optimization

Suture Bridge Construct Completion and Optimization: After all lateral row anchors placed, assess final suture bridge construct: (1) VISUALIZATION: multiple horizontal suture bridges spanning from medial to lateral row, tendon compressed against entire footprint from articular margin to lateral edge, complete coverage, no gaps. (2) SUTURE PATTERN: sutures should form neat parallel bridges - not tangled, not crossed. (3) TENSION: sutures taut creating compression, but not over-tight causing tissue blanching or bunching. (4) KNOT MANAGEMENT: if tied medial row, ensure all knots are low-profile and posterior to avoid impingement. Some surgeons perform MARGIN CONVERGENCE side-to-side sutures at this point if U-shaped tear, to augment fixation. Adjust any sutures that appear loose or too tight (can reload and re-do if needed).

Step 13: Margin Convergence for U-Shaped Tears (if applicable)

Margin Convergence for U-Shaped Tears (if applicable): If U-SHAPED tear pattern (retracted leaves creating U or V shape): perform side-to-side MARGIN CONVERGENCE to reduce strain. Technique: pass sutures from lateral leaf to medial leaf using suture-passing device or straight needle. Use horizontal mattress or simple sutures (absorbable suture). Place 2-3 convergence sutures spanning the gap. Tie to approximate leaves, converting U to crescent shape. This REDUCES strain on footprint repair by 30-40%. Margin convergence can be done BEFORE anchor placement (easier) or AFTER medial row fixation (for fine-tuning). The convergence sutures supplement the double-row fixation, improving biomechanics.

Step 14: Dynamic Repair Assessment and Range of Motion Testing

Dynamic Repair Assessment and Range of Motion Testing: Comprehensive assessment of completed repair: (1) VISUAL INSPECTION: tendon covering footprint, suture bridges intact, no gaps, no excessive bunching, good tissue color (not blanched), all anchor secure. (2) PROBE TEST: gentle probing of repair - should be very stable with no gapping even with moderate force. Double-row repair should feel extremely secure. (3) DYNAMIC ROM TEST: remove arm from traction and pneumatic holder. Perform PASSIVE ROM gently: forward flexion, abduction, internal/external rotation. Observe repair continuously - should remain intact without gapping through ROM. If gaps with normal ROM, repair is over-tensioned and at high risk of failure - must adjust (remove lateral row, retension less tightly). (4) IMPINGEMENT CHECK: passively flex and abduct arm - ensure no impingement of repair construct under acromion.

Step 15: Final Inspection, Hemostasis, Closure, and Immobilization

Final Inspection, Hemostasis, Closure, and Immobilization: Perform final 360° arthroscopic inspection: (1) GLENOHUMERAL JOINT: no loose bodies, no iatrogenic damage to cartilage, biceps intact if preserved, no intra-articular sutures or anchors. (2) SUBACROMIAL SPACE: repair intact, complete coverage, smooth contour, no prominent knots or anchors, adequate clearance under acromion. Ensure hemostasis using radiofrequency or epinephrine-soaked sponge - large hematomas impair healing. Irrigate copiously with 3-6L sterile saline to remove debris and reduce inflammation. Consider intra-articular/subacromial local anesthetic injection for pain control (20ml 0.25% bupivacaine). Remove all instruments and cannulas under visualization. Close portals: posterior and lateral with 3-0 nylon, anterior with 4-0 monocryl. Sterile dressings. IMMOBILIZATION: place arm in ABDUCTION BRACE or sling with abduction pillow maintaining 30-45° abduction. This position REDUCES supraspinatus tension optimizing healing for double-row repair. Neutral rotation. Patient education regarding immobilization compliance is critical.

Additional Important Complications:

• Persistent pain despite intact repair (10-15%): Multi-factorial including pre-existing arthritis, biceps pathology, acromioclavicular joint arthritis, cervical radiculopathy. Manage with diagnostic injections, treat concomitant pathology.
• Residual weakness (variable): Related to pre-existing muscle atrophy, fatty infiltration Goutallier 3-4, age greater than 65, massive tear size. Prevention through appropriate patient selection.
• Subacromial impingement from construct (2-5%): Thick double-row construct or prominent knots. Prevention with knotless designs, low-profile techniques. Management with debridement if symptomatic.
• Medial row failure with lateral row intact (rare): "Chicken wing" deformity on imaging. Represents over-tensioned lateral row pulling out medial fixation. Prevention through balanced tensioning.

PHASE 1 (0-6 weeks) - MAXIMAL PROTECTION FOR BIOLOGICAL HEALING: Abduction brace or sling with abduction pillow 30-45° abduction, 24/7 wear except for therapy. Passive ROM only (therapist-controlled): pendulums day 1-3, passive forward flexion in scapular plane to 90° week 2-4 (progress to 120° week 4-6), passive external rotation to 30° week 2-6. NO active motion. NO resisted exercises. Elbow/wrist ROM. Goal: protect healing while preventing stiffness.

PHASE 2 (6-12 weeks) - PROTECTED ACTIVE MOTION: Wean abduction brace week 6-8 (transition to simple sling, then wean by week 8). Begin active-assisted ROM week 6-8. Progress to full active ROM week 8-12. Light isometrics week 10-12. Goal: restore full active ROM.

PHASE 3 (12-20 weeks) - PROGRESSIVE STRENGTHENING: Active ROM against gravity. Progressive resistance exercises starting with theraband, advancing to light weights. Proprioception and scapular stabilization exercises. Goal: restore strength.

PHASE 4 (20+ weeks) - RETURN TO FULL ACTIVITY: Full strengthening program. Return to ADLs 4-5 months. Return to sport/heavy labor 5-6 months for medium tears, 6-9 months for large tears. Full biologic healing 12-18 months.

Note: Double-row repairs may benefit from slightly longer protection than single-row due to complexity and size of tears typically addressed.

References

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