Define Volkmann’s Ischaemic Contracture. Describe its clinical features and management.

Definition

Volkmann’s ischaemic contracture is the end-result of untreated acute compartment syndrome of the forearm — the ischaemic necrosis, and subsequent fibrosis and shortening, of the forearm flexor muscles, producing a fixed flexion (claw) deformity of the wrist and fingers. It is a preventable catastrophe: the tragedy is that timely recognition and fasciotomy of the compartment syndrome would have avoided it.

Cause & Pathology

The classic setting is a supracondylar fracture of the humerus in a child (injuring or compressing the brachial artery), a tight plaster, or forearm crush — causing raised compartment pressure and muscle ischaemia. The deep flexors (flexor digitorum profundus and flexor pollicis longus) are most affected; ischaemic muscle is replaced by inelastic fibrous tissue that contracts, and the adjacent nerves (median, ulnar) are also damaged, adding paralysis and sensory loss.

The established contracture: forearm pronated, wrist and fingers fixed in flexion (claw hand) from fibrosis of the ischaemic flexor muscles.

Clinical Features

The established contracture shows a flexed, pronated forearm with a flexed wrist and clawed fingers; extending the wrist increases the finger flexion and flexing the wrist allows the fingers to extend a little (the Volkmann sign, reflecting the shortened muscles crossing both joints). There is often accompanying nerve deficit (median/ulnar) with wasting and sensory loss.

Management

Prevention is paramount: prompt reduction of the fracture, avoidance of tight casts/full flexion, vigilance for compartment syndrome, and emergency fasciotomy if it develops. Once the contracture is established, treatment is difficult and aims to improve function: physiotherapy and splinting for mild cases; and surgery for established deformity — excision of dead muscle, release/lengthening of contracted muscles (or a muscle-slide procedure), tendon transfers to restore movement, nerve decompression/reconstruction, and corrective procedures. Results are limited, underscoring the value of prevention.

Relation to Compartment Syndrome

Volkmann’s contracture is best understood as the tragic end-point of a missed compartment syndrome of the forearm, and it is worth stating the prevention explicitly: after a supracondylar fracture the limb is watched for the earliest ischaemic signs, tight circular dressings and extreme elbow flexion are avoided, perfusion is restored, and any established compartment syndrome is decompressed by emergency fasciotomy within hours. Everything about the condition argues for vigilance, because once the muscles have infarcted and fibrosed the deformity and disability are permanent and only partly correctable.

• End-result of untreated forearm compartment syndrome: ischaemic fibrosis of flexor muscles → claw hand.
• Classic cause: supracondylar humeral fracture (child), tight cast, crush; deep flexors (FDP/FPL) worst.
• Fixed flexed/pronated forearm, flexed wrist, clawed fingers + median/ulnar nerve deficit.
• Prevention is everything: watch for pain on passive finger extension; emergency fasciotomy.
• Established contracture: muscle excision/slide, tendon transfers, nerve reconstruction — limited results.