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Not medical advice. Verify clinically important information against current local guidance.

Mini-Open Rotator Cuff Repair

Operative SurgeryShoulder & Elbow
Shoulder & ElbowIntermediateCore Procedure

Mini-Open Rotator Cuff Repair

Surgical technique guide for Mini-Open Rotator Cuff Repair

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intermediate
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Peer-reviewed Β· 2026-06-20
High-yield overview

Hybrid technique β€” limited arthroscopy (diagnosis and subacromial decompression) plus a mini-open deltoid-splitting repair, or a pure mini-open repair without arthroscopy Β· intermediate

shoulder-elbowSubspecialty
10 stepsOperative sequence
5cm limitAxillary-nerve safe zone
75 minTypical duration
Critical Must-Knows
  • The operation is for a full-thickness symptomatic rotator cuff tear that has failed non-operative care. It is ideal for small to medium (1 to 3cm) crescent-shaped tears with good tissue quality in a primary repair.
  • It is a hybrid: limited arthroscopy (diagnostic glenohumeral arthroscopy and subacromial decompression) followed by a mini-open deltoid-splitting repair through a 3 to 5cm incision. A pure mini-open variant skips the arthroscopy and uses a 4 to 6cm incision.
  • The deltoid split MUST stay within 5cm of the acromion to protect the axillary nerve, which lies 5 to 7cm inferior to the acromion on the deep surface of deltoid. This is the single most important safety landmark.
  • Double-row suture-bridge repair provides superior biomechanical strength and roughly halves the re-tear rate of single-row repair for medium tears, so it is the preferred construct.

When & Why


Indication. A full-thickness, symptomatic rotator cuff tear requiring surgical repair that has failed non-operative management (3 to 6 months of physiotherapy, NSAIDs and at least one injection), in a medically fit patient with realistic expectations. The tear must be one you can repair through a limited exposure. The ideal tear for mini-open repair is a small to medium (1 to 3cm) crescent-shaped tear that reduces to the footprint without complex mobilisation, with good tissue quality, in a primary repair (no prior failed surgery with scarring), in a patient with adequate bone for anchor fixation and a mobile tendon. Relative contraindications. Large or massive tears (greater than 5cm) that need extensive mobilisation, complex L-shaped or reverse-L patterns that are hard to read through a small incision, irreparable tears, severe osteoporosis (inadequate anchor purchase), active infection, significant glenohumeral arthritis (arthroplasty may be better), and a surgeon inexperienced in the technique. The one decision that matters β€” which approach. Every technique repairs the same tear; the choice is how you get to it:

Mini-open (hybrid or pure)

Limited arthroscopy plus a 3 to 5cm deltoid-splitting repair. Gives direct visualisation and palpation of tissue quality, easier suture passage, lower cost, a shorter learning curve, and is well suited to resource-limited settings.

All-arthroscopic

Camera-only repair through portals β€” preserves deltoid entirely, least pain, best cosmesis. Needs specialised equipment and a steep learning curve; outcomes are equivalent to mini-open in experienced hands.

Full open

A 5 to 7cm deltoid split for extensive exposure. Reserved for massive or complex tears needing wide mobilisation, revision surgery with scarring, or bone grafting β€” greater deltoid morbidity.

Choose mini-open when the surgeon is more comfortable with direct visualisation, arthroscopic equipment is limited, the tear is a small to medium crescent, or the setting is resource-limited. Choose arthroscopic when the surgeon is expert and deltoid preservation is desired. Choose full open for massive, complex or revision tears. Preoperative planning. Clinically assess symptom duration and mechanism (traumatic versus degenerative), active and passive ROM, rotator cuff strength (supraspinatus, infraspinatus, subscapularis), impingement signs and any atrophy. Image with X-rays (AP, lateral, axillary, outlet) to assess arthritis, acromial morphology and superior migration, and MRI (the gold standard) to grade tear size, pattern, retraction and muscle quality. Plan the approach (hybrid versus pure mini-open), the repair construct (single-row versus double-row), and the anchors (4.5 to 5.5mm; 2 to 4 anchors). Counsel the patient on expected outcomes (85 to 90 percent good or excellent results), the 10 to 30 percent re-tear risk (size- and quality-dependent), the rehabilitation (4 to 6 weeks in a sling, passive ROM only initially, strengthening after 12 weeks, full recovery 12 to 18 months), and the alternatives (non-operative management, arthroscopic repair, full open repair).

Why mini-open holds its place

Mini-open shares the advantages of both worlds: direct visualisation and palpation (you can see and feel tissue quality and repair tension β€” feedback lost with the arthroscopic camera), easier suture passage and knot tying under vision, lower cost, and a shorter learning curve. The trade-off is that it still violates deltoid, so it is best for small to medium crescent tears rather than massive or complex patterns.

The Operation


The goal: position the patient, establish the portals and the mini-open incision, perform the arthroscopic diagnosis and decompression (in the hybrid technique), split deltoid within the axillary-nerve safe zone to expose the tear, mobilise and prepare the footprint, repair the cuff with a double-row suture bridge, then close deltoid soundly. The exposure is laid out in full as the first steps below β€” it is the heart of the operation.

Mini-open cuff repair
Mini-open rotator cuff repair through a deltoid-split, reattaching the cuff with suture anchors.Credit: OrthoVellum surgical illustration

Operative sequence

Step 1Beach-chair positioning & setup
  • Supine with the back elevated 60 to 70 degrees to simulate a seated position; head secured in a foam headrest or horseshoe with the cervical spine neutral to avoid brachial plexus stretch.
  • Affected shoulder at the edge of the table for circumferential access; the arm rests in 20 to 30 degrees of abduction, neutral rotation, on a padded arm board that allows free manipulation.
  • Pad ischial tuberosities, heels and elbows; monitor blood pressure on the contralateral arm and keep the mean arterial pressure above 70mmHg (the upright position risks hypotension and cerebral hypoperfusion).
  • Secure the patient with a hip strap to prevent sliding.
Step 2Landmarks, portals & the mini-open incision
  • Mark the acromion (anterolateral and posterolateral corners, lateral edge), the clavicle, the AC joint, the coracoid and the scapular spine.
  • Hybrid technique β€” establish a posterior portal (2cm inferior and 1cm medial to the posterolateral acromion, in the soft spot) and a lateral portal (mid-lateral acromion, 2 to 3cm inferior), then plan a 3 to 5cm anterolateral mini-open incision from the anterolateral corner of the acromion, extending distally in Langer's lines.
  • Pure mini-open β€” a single 4 to 6cm anterolateral incision from the anterolateral acromion along the deltoid fibres (slightly longer, as there is no arthroscopic decompression phase).
Step 3Arthroscopic phase β€” diagnosis & decompression (hybrid only)
  • Perform diagnostic glenohumeral arthroscopy to assess the tear from the articular side and to address any concurrent intra-articular pathology (biceps, labrum, chondral damage).
  • Move to the subacromial space: bursectomy, confirm the tear size and pattern from the bursal side, and perform subacromial decompression with acromioplasty if there is a hook or spur.
  • Address the biceps (tenotomy or tenodesis) and the AC joint (distal clavicle excision) as planned. This arthroscopic phase is the decompression half of the hybrid procedure.
Step 4Deltoid split β€” the exposure (the heart of the operation)
  • Through the mini-open incision, split deltoid in the raphe between the anterior and middle fibres (the natural interval), parallel to the fibres, for 2 to 4cm distally from the acromion.
  • Keep the split within 5cm of the acromion. The axillary nerve exits the quadrangular space and runs on the deep surface of deltoid 5 to 7cm inferior to the acromion; extending the split beyond 5cm risks direct injury.
  • Place stay sutures in the deltoid margins as you split, to mark them for anatomic closure; retract with self-retaining retractors (mini-Gelpi, Army-Navy).
  • Open the bursa to expose the cuff tear and the greater tuberosity.
Step 5Identify the tear & mobilise the cuff
  • Define the tear pattern (crescent, U-shaped, L-shaped, reverse-L) and test whether the tendon reduces to the footprint with gentle traction.
  • If it does not reach without tension, mobilise in stepwise fashion: release bursal adhesions to the acromion, deltoid and coracoacromial ligament (blunt dissection, sharp as needed); release the coracohumeral ligament at the rotator interval for anterosuperior tightness; perform limited capsular releases from the bursal side for significant retraction.
  • For U-shaped or L-shaped tears, perform margin convergence (side-to-side repair of the free margins) before the footprint repair, converting the U to a crescent and reducing medial-lateral tension.
  • Suprascapular-nerve safety: the nerve runs 2 to 3cm medial to the glenoid in the spinoglenoid notch β€” limit medial and posterior capsular releases to avoid a neuropraxia.
Step 6Footprint preparation
  • Bring the arm into extension (20 to 30 degrees) and external rotation to deliver the greater tuberosity anteriorly into the mini-incision β€” critical for footprint access.
  • Clear the torn tendon stump, fibrous scar and bursal adhesions with a rongeur or curette.
  • Decorticate to a punctate bleeding surface using a curette or small (3.5 to 4.0mm) burr β€” superficial cortex removed to bleeding cancellous bone. Avoid excessive decortication, which weakens anchor purchase (especially in osteoporotic bone).
Step 7Anchor placement & the repair construct
  • Double-row suture bridge (preferred for medium tears): place 2 medial anchors at the articular margin and pass mattress sutures; then place 2 knotless lateral anchors 10 to 15mm lateral at the footprint edge, capturing the free medial limbs to form a compression bridge across the whole 2 to 3cm footprint.
  • Single-row (small tears, under 2cm, or poor bone): 2 to 3 anchors at the lateral footprint edge, 5 to 10mm apart, at the 45-degree deadman angle for optimal pullout resistance, with mattress sutures 1cm from the tendon edge and a minimum 5mm tissue bridge between passes.
  • Insert anchors with #2 braided non-absorbable high-strength sutures (FiberWire, Orthocord); confirm solid purchase by pulling before tying.
Step 8Knot tying & tension check
  • Tie sliding-locking knots (SMC, Roeder) backed up with a minimum of 3 alternating half-hitches on alternating posts, plus 2 backup throws (5 to 6 total), seated flush with a knot pusher.
  • Tension is critical: reduce the tendon to the footprint with firm contact but do not over-tighten. The tendon should look pink and perfused; a white, blanched appearance means ischaemia from over-tensioning β€” release, mobilise further, and re-tie.
Step 9Deltoid closure (critical step)
  • Re-approximate the anterior and middle deltoid fibres anatomically using the stay sutures as guides β€” no gaps, no overlap.
  • Use heavy non-absorbable sutures (#0 or #1 Ethibond, FiberWire or Hi-Fi) β€” never absorbable (Vicryl loses strength too quickly). Interrupted horizontal mattress or figure-of-8, spaced 5 to 8mm apart through substantial muscle.
  • Palpate the closure: it should feel solid with no separation on arm movement, secure but not ischaemic.
Step 10Layered wound closure & dressing
  • Close the bursal layer (2-0 absorbable if adequate tissue) and the subcutaneous layer (2-0 absorbable, bury knots, achieve haemostasis).
  • Skin: subcuticular 3-0 or 4-0 absorbable monofilament (Monocryl), optional skin adhesive.
  • Dress with a sterile dressing; immobilise in a sling with a pillow in neutral rotation. Consider a subacromial injection of local anaesthetic (20mL of 0.25 percent bupivacaine) for postoperative analgesia.
The 5cm rule β€” protecting the axillary nerve

The axillary nerve exits the quadrangular space and runs on the deep surface of deltoid, a mean of about 5cm (range 5 to 7cm) inferior to the acromion. Keep the deltoid split within 5cm of the acromion, retract gently, and respect the inferior bursal reflection (the nerve lies immediately beyond it). If the nerve is seen on the deep surface of deltoid, the split is too distal β€” back out. Most axillary nerve injuries are neuropraxias that recover over 3 to 6 months.

Deltoid closure failure is a serious complication

Deltoid detachment causes weakness, chronic pain, a visible or palpable defect, and often needs difficult revision surgery. Prevent it with heavy non-absorbable sutures in a mattress configuration, substantial tissue bites, anatomic re-approximation, and protection during early rehabilitation. Even a small mini-open split needs a closure as strong as a full open repair.

Over-tensioned repair β€” the blanched tendon

A white, blanched tendon at the repair means ischaemia from over-tensioning. It will not heal, and it raises the risk of suture cut-through and anchor pull-out. Recognise it under direct vision (the mini-open advantage), cut the knots, mobilise further, and re-tie until the tendon is pink and perfused. If the tendon still will not reduce without excessive tension, accept a partial repair or consider augmentation β€” a lower-tension partial repair beats an over-tight complete repair that fails.

Aftercare & Complications


Rehabilitation. Rehabilitation protects the healing tendon-bone interface and is identical in principle to arthroscopic or open repair. | Phase | Timing | Immobilisation | Therapy | |-------|--------|----------------|---------| | 1 β€” Protection | 0 to 6 weeks | Sling day and night | Pendulums only (wk 0 to 2); therapist-assisted passive ROM (wk 2 to 6): forward flexion to 90 to 120 degrees, external rotation 30 to 40 degrees. No abduction, no active ROM, no lifting | | 2 β€” Active-assisted | 6 to 12 weeks | Wean the sling over 1 to 2 weeks | Pulley, cane and wall walks; progress to active ROM to 140 to 160 degrees; gentle isometrics from week 8 to 12 (20 to 30 percent effort) | | 3 β€” Strengthening | 12 to 16 weeks | None for light tasks | Active ROM against gravity; Theraband and light dumbbells (0.5 to 1kg); scapular stabilisation | | 4 β€” Advanced | 16+ weeks | None | Progressive weights (1 to 5kg); sport- and work-specific patterns; proprioception and endurance | Return to unrestricted activities of daily living at about 4 to 5 months, manual labour and non-contact sports at 6 months, and contact or overhead sports at 9 to 12 months. Full biological healing takes 12 to 18 months. The most common rehabilitation error is being too aggressive (early active ROM, resistance before 12 weeks, sport before 6 months); prolonged immobilisation beyond 6 weeks causes stiffness. Complications

Re-tear (10 to 30 percent) β€” the commonest structural failure; risk rises with tear size, poor tissue, inadequate mobilisation, smoking, diabetes and non-compliance
Recognition
Recurrent pain and weakness at 3 to 6 months; loss of active ROM; MRI or ultrasound shows a gap or fluid at the repair
Prevention
Adequate mobilisation to reduce tension; double-row for medium tears; optimise biology (smoking cessation, diabetic control); counsel realistic expectations
Management
Conservative first β€” many partial re-tears are asymptomatic. Revision repair if young, symptomatic and acute with good tissue; arthroplasty if elderly, chronic or arthritic
Stiffness (5 to 10 percent)
Recognition
Progressive loss of passive and active ROM beyond the expected postop limits, more than 20 degrees different from the other side, most evident at 3 to 6 months
Prevention
Early passive ROM (pendulums week 1, passive flexion weeks 2 to 6); avoid immobilisation beyond 6 weeks; structured physiotherapy
Management
Aggressive physiotherapy and NSAIDs; corticosteroid injection after 3 months; manipulation under anaesthesia after 6 months; arthroscopic capsular release if refractory
Deltoid dysfunction (1 to 2 percent) β€” from detachment, axillary nerve injury or excessive split
Recognition
Weakness and pain on abduction or forward flexion; a palpable defect at the split site; visible deltoid wasting; denervation on EMG
Prevention
Limit the split to 2 to 4cm and within 5cm of the acromion; strong closure with heavy non-absorbable sutures; protect during early rehab
Management
Acute detachment (under 6 weeks): urgent surgical re-repair with advancement, anchors to acromion if needed. Chronic: physiotherapy; revision is difficult. Axillary nerve injury: observe 3 to 6 months, EMG at 3 months, exploration or grafting if no recovery at 6 months
Infection (0.5 to 1.5 percent) β€” superficial wound or deep subacromial infection
Recognition
Superficial: erythema, warmth, drainage, dehiscence. Deep: fever, severe pain, raised inflammatory markers; positive aspiration cultures
Prevention
Prophylactic IV cefazolin within 60 minutes of incision; meticulous sterile technique; haemostasis; glucose and smoking control
Management
Superficial: oral antibiotics and local wound care. Deep: admission, IV antibiotics, urgent debridement (retain anchors if possible), 6 to 12 weeks of antibiotics; the repair may fail β€” manage as salvage
Persistent pain despite an intact repair (5 to 10 percent)
Recognition
Continued pain beyond 6 months with an intact repair on MRI/ultrasound and normal ROM; positive AC joint, biceps or impingement tests; possible cervical referral
Prevention
Adequate acromioplasty if indicated; address biceps and AC joint pathology; low-profile or knotless lateral anchors; counsel realistic expectations
Management
Investigate (MRI, cervical imaging, subacromial or AC joint injection). Physiotherapy, NSAIDs and activity modification; arthroscopic debridement, distal clavicle excision or biceps tenotomy if a source is identified
Anchor problems β€” pull-out, intra-articular penetration, greater-tuberosity fracture, prominent anchor
Recognition
Early fixation loss or anchor migration on X-ray; late gradual re-tear, pain or mechanical symptoms; palpable prominence
Prevention
Size the anchor to the bone (5.5mm in osteoporotic bone); 45-degree deadman angle; avoid over-torquing; limited decortication; verify purchase by pulling
Management
Early pull-out: revision with repositioning, larger anchors, bone grafting if defective. Intra-articular anchor: remove arthroscopically and re-repair. Tuberosity fracture: protected immobilisation if stable, ORIF if displaced
Wound complications (2 to 5 percent) β€” delayed healing, dehiscence, hypertrophic or keloid scarring, suture granuloma
Recognition
Separating wound edges, persistent drainage, erythema beyond 10 to 14 days, a suture granuloma, a raised thick scar
Prevention
Tension-free subcuticular closure; haemostasis; sterile dressing; smoking cessation and diabetic control; patient education
Management
Local wound care and risk-factor correction; secondary closure or reclosure if deep; remove exposed sutures; scar massage, silicone sheets or corticosteroid injection for hypertrophic or keloid scars
Complications β€” recognition, prevention, management
ComplicationRecognitionPreventionManagement
Re-tear (10 to 30 percent) β€” the commonest structural failure; risk rises with tear size, poor tissue, inadequate mobilisation, smoking, diabetes and non-complianceRecurrent pain and weakness at 3 to 6 months; loss of active ROM; MRI or ultrasound shows a gap or fluid at the repairAdequate mobilisation to reduce tension; double-row for medium tears; optimise biology (smoking cessation, diabetic control); counsel realistic expectationsConservative first β€” many partial re-tears are asymptomatic. Revision repair if young, symptomatic and acute with good tissue; arthroplasty if elderly, chronic or arthritic
Stiffness (5 to 10 percent)Progressive loss of passive and active ROM beyond the expected postop limits, more than 20 degrees different from the other side, most evident at 3 to 6 monthsEarly passive ROM (pendulums week 1, passive flexion weeks 2 to 6); avoid immobilisation beyond 6 weeks; structured physiotherapyAggressive physiotherapy and NSAIDs; corticosteroid injection after 3 months; manipulation under anaesthesia after 6 months; arthroscopic capsular release if refractory
Deltoid dysfunction (1 to 2 percent) β€” from detachment, axillary nerve injury or excessive splitWeakness and pain on abduction or forward flexion; a palpable defect at the split site; visible deltoid wasting; denervation on EMGLimit the split to 2 to 4cm and within 5cm of the acromion; strong closure with heavy non-absorbable sutures; protect during early rehabAcute detachment (under 6 weeks): urgent surgical re-repair with advancement, anchors to acromion if needed. Chronic: physiotherapy; revision is difficult. Axillary nerve injury: observe 3 to 6 months, EMG at 3 months, exploration or grafting if no recovery at 6 months
Infection (0.5 to 1.5 percent) β€” superficial wound or deep subacromial infectionSuperficial: erythema, warmth, drainage, dehiscence. Deep: fever, severe pain, raised inflammatory markers; positive aspiration culturesProphylactic IV cefazolin within 60 minutes of incision; meticulous sterile technique; haemostasis; glucose and smoking controlSuperficial: oral antibiotics and local wound care. Deep: admission, IV antibiotics, urgent debridement (retain anchors if possible), 6 to 12 weeks of antibiotics; the repair may fail β€” manage as salvage
Persistent pain despite an intact repair (5 to 10 percent)Continued pain beyond 6 months with an intact repair on MRI/ultrasound and normal ROM; positive AC joint, biceps or impingement tests; possible cervical referralAdequate acromioplasty if indicated; address biceps and AC joint pathology; low-profile or knotless lateral anchors; counsel realistic expectationsInvestigate (MRI, cervical imaging, subacromial or AC joint injection). Physiotherapy, NSAIDs and activity modification; arthroscopic debridement, distal clavicle excision or biceps tenotomy if a source is identified
Anchor problems β€” pull-out, intra-articular penetration, greater-tuberosity fracture, prominent anchorEarly fixation loss or anchor migration on X-ray; late gradual re-tear, pain or mechanical symptoms; palpable prominenceSize the anchor to the bone (5.5mm in osteoporotic bone); 45-degree deadman angle; avoid over-torquing; limited decortication; verify purchase by pullingEarly pull-out: revision with repositioning, larger anchors, bone grafting if defective. Intra-articular anchor: remove arthroscopically and re-repair. Tuberosity fracture: protected immobilisation if stable, ORIF if displaced
Wound complications (2 to 5 percent) β€” delayed healing, dehiscence, hypertrophic or keloid scarring, suture granulomaSeparating wound edges, persistent drainage, erythema beyond 10 to 14 days, a suture granuloma, a raised thick scarTension-free subcuticular closure; haemostasis; sterile dressing; smoking cessation and diabetic control; patient educationLocal wound care and risk-factor correction; secondary closure or reclosure if deep; remove exposed sutures; scar massage, silicone sheets or corticosteroid injection for hypertrophic or keloid scars

Expected outcomes. Around 85 to 90 percent of patients achieve significant pain relief and report good or excellent satisfaction, 80 to 85 percent return to their previous functional level, and about 90 percent regain functional ROM (forward flexion above 120 degrees). Strength improves gradually over 12 to 18 months and may not fully normalise. Structural healing (re-tear rates). Overall 10 to 30 percent depending on tear characteristics: small tears (under 1cm) 5 to 10 percent, medium tears (1 to 3cm) 15 to 25 percent, large tears (3 to 5cm) 30 to 40 percent, and massive tears (over 5cm) 40 to 60 percent β€” massive tears are generally not done mini-open. Double-row constructs lower the re-tear rate by about 10 to 15 percent versus single-row. Good prognosis favours small or medium crescent tears, acute or traumatic onset, good tissue quality, minimal fatty infiltration (Goutallier 0 to 1), minimal retraction, a non-smoker, good bone, and rehab compliance. Poor prognosis favours large or massive tears, chronic degenerative tears, poor tissue, advanced fatty infiltration (Goutallier 3 to 4), significant retraction (Patte 3), smoking, diabetes, osteoporosis, non-compliance, and a workers' compensation claim. Meta-analyses show equivalent structural healing and functional outcomes between arthroscopic and mini-open repair in experienced hands; surgeon experience matters more than the technique chosen.

Viva & Exam Focus


Mnemonic

SPLITSPLIT β€” deltoid safety principles

S
Size limited
Keep the deltoid split 2 to 4cm β€” adequate exposure with minimal morbidity
P
Protect the axillary nerve
Never extend the split beyond 5cm below the acromion β€” the nerve lies 5 to 7cm inferior
L
Line with the fibres
Split between anterior and middle deltoid in the raphe, not across the fibres
I
Identify the margins
Tag the deltoid edges with stay sutures for anatomic closure
T
Tough closure
Heavy non-absorbable sutures (#0 to #1 Ethibond or FiberWire) β€” the critical final step
Mnemonic

ANCHORSANCHORS β€” double-row repair technique

A
Angle 45 degrees
Insert at the deadman angle for optimal pullout resistance
N
Number appropriate
Medial row 2 anchors, lateral row 2 anchors for medium tears
C
Coverage complete
Medial row at the articular margin, lateral row 10 to 15mm lateral for full footprint coverage
H
High-strength suture
Load with #2 braided non-absorbable (FiberWire, Orthocord)
O
Observe placement
Direct visualisation confirms position β€” the mini-open advantage
R
Reduce tension
Mobilise the cuff so the repair is not under excessive tension
S
Solid purchase
Confirm fixation by pulling β€” the anchor should be rock-solid in bone
Axillary nerve

Exits the quadrangular space and runs on deltoid's deep surface 5 to 7cm inferior to the acromion. Protection: keep the deltoid split within 5cm of the acromion and retract gently.

Suprascapular nerve

Passes through the suprascapular notch and runs 2 to 3cm medial to the posterior glenoid rim in the spinoglenoid notch. Protection: avoid aggressive medial and posterior capsular releases during mobilisation.

Musculocutaneous nerve

Enters coracobrachialis 3 to 8cm distal to the coracoid tip (variable). Protection: limit anterior dissection beyond the coracoid and stay aware during subscapularis work.

Cephalic vein

Runs in the deltopectoral groove. Protection: only at risk in the deltopectoral variant β€” identify it and protect it (take it laterally with deltoid or medially with pectoralis).

Greater tuberosity

The anchor insertion site, at risk in osteoporotic bone. Protection: avoid over-decortication, use an appropriate anchor size (4.5 to 5.5mm), limit anchor density, and insert at the 45-degree deadman angle.

Clinical Decision Scenarios

Practise clinical reasoning and management decisions out loud

Viva scenarioStandard
Clinical prompt

β€œA 58-year-old manual labourer has a 2cm crescent-shaped supraspinatus tear on MRI with minimal retraction and good tissue quality, having failed 4 months of physiotherapy. What are the advantages and disadvantages of mini-open repair compared with arthroscopic repair for this patient?”

Viva scenarioStandard
Clinical prompt

β€œAfter placing your medial-row anchors and tying the knots, the tendon looks white and blanched at the repair site. What is the problem and how do you manage it?”

Viva scenarioStandard
Clinical prompt

β€œAs you close the deltoid split, the fellow suggests 2-0 Vicryl absorbable sutures 'to avoid suture removal'. What is your response and what is the correct deltoid closure technique?”

Exam day cheat sheet
Mini-open rotator cuff repair β€” exam-day essentials

Indication

  • Full-thickness symptomatic tear failing 3 to 6 months of non-operative care
  • Ideal: small to medium crescent tear (1 to 3cm), good tissue, primary, mobile
  • Surgeon preference and resource setting drive the choice
  • Avoid: large or massive tears, complex U or L shapes, irreparable tears

Key anatomy

  • Deltoid split: raphe between anterior and middle fibres, 2 to 4cm, within 5cm of the acromion
  • Axillary nerve: 5 to 7cm inferior to the acromion on deltoid's deep surface
  • Suprascapular nerve: 2 to 3cm medial to the glenoid
  • Greater-tuberosity footprint: 2 to 3cm AP by 1 to 2cm ML; arcuate-artery supply

Critical steps

  • Hybrid: limited arthroscopy (diagnosis and decompression) then mini-open repair
  • Mini-open incision 3 to 5cm; deltoid split 2 to 4cm in the raphe, within 5cm of the acromion
  • Mobilise (adhesions, coracohumeral ligament, limited capsular releases) to reach the footprint without tension
  • Footprint prep: arm extension and ER, decorticate to punctate bleeding, avoid over-removal
  • Double-row: medial anchors at the articular margin, knotless lateral 10 to 15mm lateral β€” suture bridge
  • Mattress 1cm from edge, 5mm tissue bridge, pink not blanched
  • Deltoid closure: heavy non-absorbable #0 to #1, mattress, 5 to 8mm spacing

Danger zones

  • Axillary nerve (5 to 7cm below the acromion) β€” limit the split to within 5cm
  • Suprascapular nerve (2 to 3cm medial to the glenoid) β€” limit medial releases
  • Musculocutaneous nerve (3 to 8cm distal to the coracoid) β€” limit anterior dissection
  • Greater-tuberosity fracture β€” avoid over-decortication, size the anchor, 45-degree angle
  • Over-tensioned repair (blanching) β€” mobilise adequately

Technique pearls

  • Mini-open advantages: direct visualisation and palpation, easier suturing, lower cost, shorter learning curve
  • Mini-open disadvantages: violates deltoid, limited exposure, intermediate pain and stiffness
  • Arm extension and ER deliver the tuberosity anteriorly for footprint access
  • Tag deltoid edges with stay sutures for anatomic closure

Complications

  • Re-tear 10 to 30 percent β€” mobilise well, double-row for medium tears, optimise biology, rehab compliance
  • Deltoid dysfunction 1 to 2 percent β€” strong non-absorbable closure, limit the split
  • Stiffness 5 to 10 percent β€” early passive ROM, avoid immobilisation beyond 6 weeks
  • Infection 0.5 to 1.5 percent β€” prophylactic antibiotics, sterile technique, urgent debridement if deep
  • Nerve injury under 1 percent β€” axillary (split over 5cm), suprascapular (medial releases); document and monitor

Post-op protocol

  • Phase 1 (0 to 6 weeks): sling, passive ROM only β€” pendulums, supine slides to 90 to 120 degrees
  • Phase 2 (6 to 12 weeks): wean sling, active-assisted then active ROM, isometrics from week 8
  • Phase 3 (12 to 16 weeks): strengthening (Theraband, 0.5 to 1kg weights)
  • Phase 4 (16+ weeks): advanced strengthening β€” unrestricted 4 to 6 months, sports 6 to 9 months

Exam tips

  • Mini-open is hybrid (arthroscopy plus mini-open) or pure mini-open β€” state which
  • Outcomes are equivalent to arthroscopy and open in experienced hands
  • Direct visualisation and palpation is the primary advantage
  • Deltoid closure is as critical as the cuff repair β€” heavy non-absorbable sutures
  • Never extend the deltoid split beyond 5cm below the acromion

Background & Evidence


Overview. Rotator cuff repair reattaches a torn cuff tendon (most often supraspinatus) to its footprint on the greater tuberosity. The cuff consists of supraspinatus (superior facet), infraspinatus (posterosuperior) and teres minor (posteroinferior) on the greater tuberosity, with subscapularis on the lesser tuberosity. The footprint measures roughly 2 to 3cm anteroposteriorly by 1 to 2cm medial-laterally, and the bone is supplied by the arcuate artery (a branch of the anterior and posterior circumflex humeral arteries). Degenerative tears occur most often in older patients (often more than 60 years) and are frequently multipatterson; traumatic tears occur at any age. Mini-open repair is suited to the small to medium crescent end of this spectrum. Tear classification governs whether mini-open is appropriate.

Small
Dimension
Under 1cm
Typical re-tear rate
5 to 10 percent
Mini-open suitability
Ideal
Medium
Dimension
1 to 3cm
Typical re-tear rate
15 to 25 percent
Mini-open suitability
Ideal (preferred for mini-open)
Large
Dimension
3 to 5cm
Typical re-tear rate
30 to 40 percent
Mini-open suitability
Difficult β€” arthroscopic or full open usually better
Massive
Dimension
Over 5cm
Typical re-tear rate
40 to 60 percent
Mini-open suitability
Not suited to mini-open β€” full open or arthroscopic
Rotator cuff tear size and structural healing
SizeDimensionTypical re-tear rateMini-open suitability
SmallUnder 1cm5 to 10 percentIdeal
Medium1 to 3cm15 to 25 percentIdeal (preferred for mini-open)
Large3 to 5cm30 to 40 percentDifficult β€” arthroscopic or full open usually better
MassiveOver 5cm40 to 60 percentNot suited to mini-open β€” full open or arthroscopic

Tear pattern is read at arthroscopy or through the mini-incision: a crescent tear reduces simply to the footprint and is ideal for mini-open; U-shaped and L-shaped (and reverse-L) tears have a longitudinal component and need margin convergence (side-to-side repair of the free margins before footprint fixation) to reduce tension. Complex patterns are hard to read and repair through a limited incision.

1
Description
Tendon stump close to the bony insertion
Implication
Easily repairable, low tension
2
Description
Stump retracted to the level of the glenoid rim
Implication
Needs mobilisation, usually repairable
3
Description
Stump retracted medial to the glenoid rim
Implication
Significant retraction, harder to repair, high tension
Patte classification β€” tear retraction (coronal plane)
StageDescriptionImplication
1Tendon stump close to the bony insertionEasily repairable, low tension
2Stump retracted to the level of the glenoid rimNeeds mobilisation, usually repairable
3Stump retracted medial to the glenoid rimSignificant retraction, harder to repair, high tension

0
Muscle appearance
Normal muscle, no fat
Prognostic implication
Good healing potential
1
Muscle appearance
Some fatty streaks
Prognostic implication
Good healing potential
2
Muscle appearance
More muscle than fat
Prognostic implication
Acceptable
3
Muscle appearance
As much muscle as fat
Prognostic implication
Predicts poorer healing
4
Muscle appearance
More fat than muscle
Prognostic implication
Predicts poor healing β€” often irreparable
Goutallier grading β€” fatty infiltration of the muscle (CT or MRI)
GradeMuscle appearancePrognostic implication
0Normal muscle, no fatGood healing potential
1Some fatty streaksGood healing potential
2More muscle than fatAcceptable
3As much muscle as fatPredicts poorer healing
4More fat than musclePredicts poor healing β€” often irreparable
Goutallier grades 3 to 4 and Patte stage 3 are the preoperative predictors of irreparability and re-tear, and should prompt counselling about the higher failure risk and the possible need for partial repair, augmentation or arthroplasty. Key evidence. The mini-open versus arthroscopic question is settled by level I evidence: a meta-analysis (Morse, 2008) found no difference in functional outcomes or complications, and a randomised trial (Kasten, 2011) confirmed equivalent Constant scores and healing at 6 to 24 months, with any early arthroscopic pain advantage small and not sustained. For the repair construct, a meta-analysis of seven RCTs (Millett, 2014) showed double-row repair roughly halves the re-tear rate of single-row (25.9 percent versus 14.2 percent) without a difference in early functional scores. The anatomic safe zone for the deltoid split comes from Beals (1998), who mapped the axillary nerve a mean of about 5cm from the acromion.

References


Evidence

Arthroscopic versus mini-open rotator cuff repair: a comprehensive review and meta-analysis

Level I
Morse K, Davis AD, Afra R, Kaye EK, Schepsis A, Voloshin I β€’ Am J Sports Med (2008)
Key Findings:
  • Meta-analysis of 5 Level I-III comparative studies (MEDLINE/PubMed 1966-2006) with minimum 1-year (mean over 2-year) follow-up, all outcome scores converted to a 100-point scale
  • NO significant difference in functional outcome scores between all-arthroscopic and mini-open repair groups
  • NO significant difference in complication rates between the two techniques
Clinical implication: Mini-open repair is a valid, evidence-based alternative to all-arthroscopic repair. Technique choice should be driven by surgeon expertise, tear characteristics and available resources rather than a belief that arthroscopic repair is intrinsically superior.
Verify on PubMed (PMID 18753683)
Evidence

Prospective randomised comparison of arthroscopic versus mini-open rotator cuff repair of the supraspinatus tendon

Level I
Kasten P, Keil C, Grieser T, Raiss P, Streich N, Loew M β€’ Int Orthop (2011)
Key Findings:
  • RCT of 34 patients (17 per arm; mean age 60 years) with isolated supraspinatus tears; arthroscopic double-row vs mini-open transosseous repair, identical standardised rehabilitation
  • Less early NSAID use at week 1 in the arthroscopic group, but the mini-open group had LOWER pain scores from weeks 4 to 8 (p less than 0.05)
  • At 6 months Constant-Murley score, range of motion and MRI healing (3 of 16 re-ruptures in EACH group) were equivalent between techniques
Clinical implication: Level I evidence that mid-term clinical and structural outcomes are equivalent between arthroscopic and mini-open repair. Any early pain advantage of arthroscopy is small and not sustained, reinforcing mini-open as a sound choice for isolated supraspinatus tears.
Verify on PubMed (PMID 21533643)
Evidence

Clinical and structural outcomes after arthroscopic single-row versus double-row rotator cuff repair: a systematic review and meta-analysis of level I randomized clinical trials

Level I
Millett PJ, Warth RJ, Dornan GJ, Lee JT, Spiegl UJ β€’ J Shoulder Elbow Surg (2014)
Key Findings:
  • Meta-analysis of 7 Level I RCTs (524 shoulders) comparing single-row with double-row repair
  • Imaging-confirmed re-tear rate 25.9% (68/263) single-row vs 14.2% (37/261) double-row; relative risk 1.76 (95% CI 1.25-2.48, p=0.001) favouring double-row, driven mainly by partial-thickness re-tears
  • NO significant difference in ASES, UCLA or Constant score improvement between constructs
Clinical implication: Double-row (suture-bridge) constructs improve structural healing and roughly halve the re-tear rate versus single-row, supporting double-row for medium tears even though early functional scores are similar. Single-row remains acceptable for small tears or poor bone stock.
Verify on PubMed (PMID 24411671)
Evidence

The outcome and repair integrity of completely arthroscopically repaired large and massive rotator cuff tears

Level III
Galatz LM, Ball CM, Teefey SA, Middleton WD, Yamaguchi K β€’ J Bone Joint Surg Am (2004)
Key Findings:
  • 18 patients with tears over 2cm repaired arthroscopically, assessed by validated ultrasound protocol at minimum 12 and 24 months
  • Recurrent defects in 17 of 18 shoulders; ASES improved from 48.3 to 84.6 at 1 year despite non-healing
  • Results deteriorated by 2 years (mean ASES fell to 79.9; forward elevation fell from 152 to 142 degrees), linking large tear size to high re-tear and late decline
Clinical implication: Re-tear risk rises steeply with tear size and large/massive tears heal poorly through any limited approach. This justifies restricting mini-open repair to small-to-medium crescent tears and counselling patients with larger tears about deterioration over time.
Verify on PubMed (PMID 14960664)
Evidence

Useful boundaries of the subacromial bursa (axillary nerve safe-zone anatomy)

Level V
Beals TC, Harryman DT, Lazarus MD β€’ Arthroscopy (1998)
Key Findings:
  • Cadaveric study (17 specimens) mapping the subacromial bursa relative to the acromion and circumflex (axillary) nerve
  • Mean distance from all points of the acromion to the axillary nerve was approximately 5cm; the subdeltoid bursal reflection lay a mean of 0.8cm (range 0-1.4cm) above the nerve
  • Authors explicitly recommend coupling the bursal reflection landmark to published safe deltoid-split distances during mini-open rotator cuff repair to avoid axillary nerve injury
Clinical implication: Provides the anatomic basis for the deltoid-split safe zone: keep the split within approximately 5cm of the acromion and respect the inferior bursal reflection, since the axillary nerve lies immediately beyond it.
Verify on PubMed (PMID 9681537)
Evidence

Open versus arthroscopic rotator cuff repair: a comparative view of 96 cases

Level III
Buess E, Steuber KU, Waibl B β€’ Arthroscopy (2005)
Key Findings:
  • Comparative study of open and arthroscopic rotator cuff repair in 96 cases
  • Mini-open and arthroscopic repairs achieved equivalent functional outcomes with similar complication rates
Clinical implication: Reinforces that mini-open and arthroscopic repair are clinically equivalent in appropriate hands.
Verify source (DOI)
Evidence

Arthroscopically assisted rotator cuff repair: correlation of functional results with integrity of the cuff

Level IV
Liu SH, Baker CL β€’ Arthroscopy (1994)
Key Findings:
  • Early description of the mini-open (arthroscopically assisted) technique
  • 88 percent good or excellent results, with intact repairs correlating with better outcomes
Clinical implication: Foundational evidence that an intact repair on imaging correlates with better clinical function.
Verify source (DOI)
Evidence

All-arthroscopic versus mini-open rotator cuff repair: a long-term retrospective outcome comparison

Level III
Severud EL, Ruotolo C, Abbott DD, Nottage WM β€’ Arthroscopy (2003)
Key Findings:
  • Long-term retrospective comparison of all-arthroscopic and mini-open repair
  • No significant differences in UCLA scores, patient satisfaction or re-tear rates between techniques
Clinical implication: Long-term data confirm equivalence between arthroscopic and mini-open repair.
Verify source (DOI)
Evidence

All-arthroscopic versus mini-open rotator cuff repair: a retrospective review with minimum 2-year follow-up

Level III
Verma NN, Dunn W, Adler RS, et al β€’ Arthroscopy (2006)
Key Findings:
  • Retrospective comparison with minimum 2-year follow-up
  • Similar healing rates (92 percent arthroscopic vs 93 percent mini-open) and functional outcomes
Clinical implication: Reinforces equivalent structural healing and function between arthroscopic and mini-open repair.
Verify source (DOI)
Evidence

Arthroscopic versus mini-open rotator cuff repair: a comparison of clinical outcome

Level III
Sauerbrey AM, Getz CL, Piancastelli M, et al β€’ Arthroscopy (2005)
Key Findings:
  • Comparison of arthroscopic and mini-open repair clinical outcomes
  • Equivalent ASES and UCLA scores, with slightly less pain in the arthroscopic group at early follow-up
Clinical implication: Clinical equivalence is maintained; any early pain advantage of arthroscopy is small.
Verify source (DOI)
Evidence

Arthroscopically assisted mini-open rotator cuff repair

Level IV
Shinners TJ, Nordquist DS, Orwin JF β€’ Arthroscopy (2002)
Key Findings:
  • Technical description of the hybrid mini-open technique with arthroscopic decompression
  • Good outcomes and low complication rates reported
Clinical implication: Describes the hybrid technique (arthroscopic decompression plus mini-open repair) that underpins the modern mini-open approach.
Verify source (DOI)
Editorially reviewed β€” transparent references and correction processPublished by OrthoVellum Medical Education TeamEditorial boardMethodologyReview policy
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Educational content is reviewed for source visibility, editorial coherence, and correction readiness.

No individual clinician credential is claimed unless a named person is shown.

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Peer-reviewed Β· 2026-06-20
Procedure info
Level
intermediate
Read time
28
Updated
2026-06-20
SURGICAL APPROACHES USED
Shoulder Arthroscopy ApproachAnterosuperior (Deltoid-Split) Approach to the Shoulder
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