Elbow Stiffness — Release

Elbow stiffness is a functionally debilitating condition defined as loss of the normal arc of motion (0–145° flexion-extension; 75° pronation / 85° supination). Even modest loss of motion significantly impairs upper limb function. The elbow is uniquely prone to stiffness due to its tight osseous congruity, rich capsular innervation, and propensity for heterotopic ossification.

• Functional arc of motion: 30–130° flexion-extension and 50° each of pronation/supination — minimum required for most activities of daily living (Morrey, 1981)
• Most common causes: post-traumatic (distal humerus fractures, elbow dislocations, radial head fractures), burns, prolonged immobilisation, heterotopic ossification, degenerative arthritis
• Incidence of clinically significant stiffness after elbow trauma: up to 50% in some series
• Higher risk: complex fracture-dislocations, delayed mobilisation, head injury (HO risk), burns, prolonged casting
• Loss of terminal extension most common and most functionally tolerated; loss of flexion beyond 90° severely limits hand-to-mouth function

Classifying the cause and pattern of stiffness directs the correct surgical approach.

• Kay classification: Type I (extrinsic only), Type II (intrinsic only), Type III (mixed) — guides surgical planning
• Morrey classification: simple (soft tissue only) vs complex (with bony block) — determines need for bony resection
• Anterior capsule: primary restraint to extension — thickens and contracts with immobilisation
• Posterior capsule: primary restraint to flexion — less commonly the limiting structure in isolation
• Anterior and posterior capsulotomy required for combined flexion and extension loss

• History: nature and timing of injury, prior surgery, duration of stiffness, rate of progression, pain levels, ulnar nerve symptoms
• Examination: precise goniometric ROM measurements (active and passive), end feel (hard = bony block; soft = capsular/muscular), neurovascular status, ulnar nerve assessment (Tinel, intrinsic weakness), skin condition
• Plain radiographs: AP and lateral — assess for HO, loose bodies, articular congruity, prior hardware, joint space narrowing
• CT scan: mandatory for surgical planning — defines HO extent, location, articular surface, loose bodies; 3D reconstruction helps plan resection and approach
• MRI: less commonly used; useful for assessing collateral ligament integrity and articular cartilage if joint replacement being considered
• Ulnar nerve status must be documented preoperatively — anterior transposition may be required at time of release; unrecognised preoperative ulnar neuropathy creates medicolegal risk
• Timing of surgery: minimum 6 months from injury before elective contracture release — allows soft tissue maturation and HO maturation; earlier intervention acceptable for specific indications (locked elbow, vascular compromise)
• HO maturity: confirm on plain film (mature trabecular pattern) or nuclear bone scan (cold scan = mature) before excision

• Static progressive splinting: low-load prolonged stretch — applies constant torque at end range; most effective non-operative intervention for contracture; worn for 30–60 minutes per session multiple times per day
• Dynamic splinting: spring-loaded; applies constant force throughout ROM; less well-tolerated; useful for flexion contractures
• Turnbuckle splint: static progressive device — adjustable strut allows incremental correction; well-tolerated; commonly used for extension deficits
• Physiotherapy: active and passive ROM exercises, contract-relax techniques — cornerstone of both conservative treatment and postoperative rehabilitation
• NSAIDs and corticosteroid injections: limited role in established contracture; may help with pain-limited mobilisation
• Non-operative treatment appropriate as first-line for contractures of less than 12 months duration with no bony block and compliant patients

Surgical release is indicated when non-operative measures fail, when there is a bony block to motion, or when HO requires excision. Approach selection depends on the predominant contracture and structures to be addressed.

• Column procedure (Urbaniak/Morrey): lateral approach with anterior and posterior capsulotomy through lateral column — workhorse for extrinsic contracture; preserves collateral ligaments
• Arthroscopic release: excellent results in experienced hands for extrinsic contracture — lower morbidity, faster recovery; significant risk of neurovascular injury given proximity of brachial artery, median nerve (anterior), and radial nerve (anterolateral) to capsule; should only be performed by experienced elbow arthroscopists
• Ulnar nerve: decompress and anteriorly transpose whenever medial approach used or when preoperative ulnar neuropathy present — prevents tethering with increased flexion post-release
• Distraction arthroplasty (hinged external fixator): used for severely comminuted articular disease or post-release instability — maintains joint reduction while allowing motion; protects repair

• HO at elbow most common after: elbow dislocations, radial head fractures, distal humerus fractures, burns, head injury, spinal cord injury
• Prophylaxis: indomethacin 25 mg TDS for 3–6 weeks postoperatively OR single-dose radiation (700 cGy) within 72 hours of surgery — both proven effective
• Timing of HO excision: wait for maturity — plain film trabeculation or cold bone scan; typically 12–18 months post injury
• Early excision (6–9 months) acceptable when HO is causing neurovascular compromise or preventing essential rehabilitation
• Recurrence risk after excision: 10–20%; higher in head-injured patients and burns — mandatory prophylaxis post-excision
• Classification of elbow HO: Hastings & Graham — Class I (no motion loss), Class II (significant loss), Class III (ankylosis) — guides surgical urgency

• Continuous passive motion (CPM) commenced in recovery room — maintains surgical gains while patient is under anaesthesia effect
• Active and active-assisted ROM exercises from day 1 postoperatively — do not allow scar to reform
• Static progressive splinting at terminal extension and flexion — alternated throughout the day
• HO prophylaxis: indomethacin or low-dose radiation commenced within 72 hours of surgery
• Regional anaesthesia (brachial plexus block): invaluable — extends pain-free window for early aggressive mobilisation; consider catheter for 48–72 hours
• Nerve monitoring: document ulnar nerve function daily in first week post medial approach or ulnar nerve transposition

• Stability after release: aggressive capsulotomy risks collateral ligament injury — assess intraoperative stability under fluoroscopy after release; if unstable, apply hinged external fixator to protect repair and allow early motion
• Ulnar nerve management is the single most important decision in medial-sided or combined release — in situ decompression sufficient if nerve is mobile and no preoperative neuropathy; anterior subcutaneous or submuscular transposition required if nerve is scarred, tethered, or symptomatic
• Articular cartilage status: if significant chondral loss present, consider interposition arthroplasty (fascia lata, dermal allograft) or total elbow arthroplasty (TEA) — contracture release alone on a damaged joint gives poor and short-lived results
• Hardware: symptomatic hardware causing impingement or blocking motion should be removed at time of release — plan combined procedure; avoid staged removal as it creates additional scarring episodes
• Outcome expectations: average gain of 40–50° of motion reported after open release; arthroscopic release typically gains 30–40°; patient counselling must include realistic targets and commitment to intensive postoperative therapy

• Functional arc: 30–130° flexion-extension; 50° pronation and supination (Morrey)
• Anterior capsule limits extension; posterior capsule limits flexion
• Hard end feel = bony block; soft end feel = capsular/muscular — determines surgical approach
• HO prophylaxis: indomethacin or single-dose radiation (700 cGy) within 72 hours
• Arthroscopic release — high neurovascular risk; brachial artery and median nerve anterior, radial nerve anterolateral
• Ulnar nerve must be assessed and documented preoperatively — anterior transposition at time of release if symptomatic or tethered
• Wait minimum 6 months before elective release; wait for HO maturity (cold bone scan) before excision
• Column procedure (lateral approach): workhorse for extrinsic contracture — anterior and posterior capsulotomy through lateral column
• Hinged external fixator: for post-release instability or distraction arthroplasty in articular disease
• CPM in recovery room — maintain surgical gains before scar reformation begins