Chronic ligament instability at the elbow

What does chronic ligament instability mean?

Chronic instability occurs when there is functionally relevant joint instability after ligament injuries or repeated overloading for more than three months. This can be the result of an incompletely healed rupture, multiple microtraumas, or a combination of capsular and ligamentous lesions. Valgus instability (internal hinge, often ulnar/medial) or posterolateral rotational instability (PLRI, more lateral) are typical.

• Valgus instability: the ulnar collateral ligament (UCL) is most commonly affected, often in throwing sports.
• Varus/lateral instability: affects the lateral ligament complex, v. a. the lateral ulnar collateral ligament (LUCL).
• PLRI: Feeling of “spinning/slipping away” during supporting movements with extended elbow and supinated hand.

Anatomy and biomechanics of the elbow

The elbow is a complex hinge-swivel joint made up of the upper arm bone (humerus), ulna (ulna) and radius (radius). Ligament complexes and the joint capsule ensure stability in the flexion/extension direction as well as against lateral unfolding and rotational forces.

• Medial (ulnar) ligament apparatus: Ulnar Collateral Ligament (UCL) with anterior, posterior and transverse ligament units; crucial against valgus stress.
• Lateral ligament apparatus: lateral ulnar collateral ligament (LUCL) and radial collateral ligament (RCL) as protection against varus and rotational instability.
• Flexor-pronator and extensor muscles: dynamic stabilization, important for rehabilitation and prevention.

If part of the ligament-capsule complex is permanently insufficient, the muscles and capsule only compensate to a limited extent. This then results in stress-dependent pain, unsteadiness or repeated subluxations.

Typical symptoms

• Feeling of instability, “kinking away” or “close to dislocating” under stress
• Pain on the inside (valgus) or outside (varus/PLRI) of the elbow
• Uncertainty during supporting movements (e.g. getting up from a chair, push-ups)
• Reduction in throwing speed or precision, early fatigue
• Occasionally snapping/locking, swelling or loss of strength
• If nerves are involved: tingling/numbness (especially on the ulnar side, little/ring finger)

Causes and risk factors

Chronic instability often has multiple triggers. It often begins with an acute injury (dislocation/ligament rupture) or gradually due to overuse with microtrauma, especially in throwing and racket sports.

• Overload: repeated peaks of valgus stress (baseball/handball/volleyball), intensive strength training, construction or craft work with twisting/lever loads
• Previous injuries: elbow dislocation, ligament tears (UCL/LUCL), capsular injuries
• Lack of rehabilitation after acute injury, build-up of stress too early
• Biomechanical factors: scapula/trunk deficits, limited shoulder internal rotation, hyperlaxity
• Occupational stress with frequent support, pressing or vibration
• Concomitant diseases: deposits/impingement, cartilage/osteochondral defects

Diagnostics in Hamburg: step by step

The diagnosis is based on a precise anamnesis, clinical functional testing and targeted imaging. It is crucial to recognize the instability pattern (valgus, varus, PLRI) and to record accompanying pathologies.

• History: mechanism of injury, sport/work profile, duration, stressful situations, neurological symptoms
• Clinical tests: Valgus/varus stress test in 0-30° flexion, moving valgus stress test, milking maneuver (UCL), posterolateral rotatory drawer/shift (PLRI), elbow pivot shift test
• Function chain: posture, shoulder blade control, upper arm/forearm muscle function
• Imaging: X-ray (including stress images), if necessary dynamic ultrasound, MRI or MR arthrography to display ligament and capsule structures; CT for bony lesions
• Red flags: significant axial deviation, acute dislocation, progressive neurological deficits - immediate clarification

Conservative therapy: standard and first choice

In the majority of cases, the symptoms can be significantly improved through structured conservative treatment. It combines load management, orthoses/tape, targeted training and, if necessary, temporary medication support.

• Stress control: temporary reduction of triggering activities (throwing, heavy lifting, support), pain-adapted everyday life
• Orthosis/Taping: functional bandages for guidance during sport/work; individually adapted
• Physiotherapy: Strengthening the flexors-pronators (medial protection) and extensors/supinators (lateral protection), proprioception, neuromuscular training
• Kinetic Chain: Scapular stability, rotator cuff, core and hip strength to reduce valgus stress
• Mobility: joint-friendly mobility, scar/capsule management, dealing with joint stiffness
• Medication: time-limited NSAIDs if needed; Ice/compression for irritable conditions

Duration: Often 8-12 weeks of intensive build-up, for athletes 3-6 months until a resilient return to sport. Criteria-based, not calendar-based: pain-free functional tests, stable stress tests, sufficient strength and technique.

Regenerative injections: options with restraint

For partial ligament lesions and persistent irritation, injection procedures may be considered. The study situation is heterogeneous; not everyone benefits. Careful indication, information about benefits and risks, and realistic expectations are essential.

• PRP (platelet-rich plasma): can provide healing impulses, especially a. in partial UCL lesions; Evidence mixed.
• Prolotherapy/sclerotherapy: The aim is to irritate the tissue to strengthen it; Data situation inconsistent.
• Cortisone: short-term anti-inflammatory; In the case of ligament insufficiency, it is reserved so as not to further weaken the tissue.

Possible side effects: temporary pain, bruising, infection (rare), nerve irritation. Injections do not replace training and load adaptation.

Surgery: When does an operation make sense?

Surgery is an option if clinically relevant instability remains despite consistent conservative treatment, if professional/sporting requirements cannot be met, or if there is a complete ligament tear with loss of function. The decision is made individually and based on evidence – with no promise of success.

• Medial (UCL): direct ligament suture for fresh tears, otherwise reconstruction with tendon transplant (e.g. palmaris longus/gracilis; “Tommy John” principle) for persistent valgus instability.
• Lateral (LUCL/RCL): anatomical reconstruction of the LUCL in PLRI; If necessary, additional lateral capsule reinforcement.
• Arthroscopy: accompanying free joint bodies, synovitis or impingement can be addressed minimally invasively.
• Nerve management: ulnar nerve (medial) in case of irritation, if necessary protection/transposition.

Risks: Infection, bleeding, nerve irritation/injuries (especially ulnar nerve), persistent pain, stiffness, thrombosis, CRPS, inadequate stability. Follow-up treatment is crucial for the result.

Follow-up treatment and rehabilitation

Rehabilitation proceeds in phases. Exact protocols vary depending on the findings and procedure – they will be discussed with you individually.

Regular follow-up checks help to avoid overload and stiffness and to adapt the structure to work and sport in Hamburg's everyday life.

Everyday life, work and sport: what is realistic?

• Everyday life: Many activities are possible early on as long as valgus stress and supporting positions are avoided.
• Office/IT: quick return with ergonomic adjustment (mouse/keyboard, forearm rest).
• Craft/production: gradual increase in load; Plan resources and breaks.
• Sport: Technique training, control the throwing volume, increase it painlessly and stably.

Prevention and self-management

• Warm up and progressive increase in load before training/competition
• Train shoulder blade and core stability, check technique regularly
• Document throwing/hitting volume, observe breaks and off-season
• Ergonomics in the workplace, non-slip pads for supporting work
• Take early signs seriously: Pain is a signal, not the training instruction

When should I seek medical advice?

• Sensation of the elbow “sticking out” or turning away repeatedly
• Increasing weakness, significant swelling or blocking
• Tingling/numbness in the ring and little fingers, loss of hand strength
• After an acute dislocation, audible tear or fall with misalignment
• Persistent symptoms despite training and load adjustments over several weeks

Course and prognosis

With consistent conservative therapy, many elbows noticeably stabilize. Patience, continuous training and optimization of the entire movement and strength chain are crucial. If there is a clear indication for surgery, reconstruction can create good conditions for regaining stability suitable for everyday life and sports. Individual factors – tissue quality, type of sport, occupational stress, rehabilitation adherence – have a significant influence on the course.