Original Editors - Alexander Ghyssels
Clinically Relevant Anatomy
The bones are an important factor in Volkmann's contracture. We can see that the humerus of the upper arm is often involved in Volkmann's contracture. A fracture of the supracondylary space causes a deficit in the circulation of the arteria brachialis. It is caused by the blocking of the circulation and a deficit in blood supply to the muscles and nerves malfunction. There is a contraction of the muscles, usually, the flexors of the wrist. Yet there is also a contracture occur in the extensors of the wrist, but this is less common. Muscles that are typically involved are the:
- Superficial flexors:
- Musculus pronator teres (median nerve innervation)
- Musculus flexor carpi radialis (median nerve innervation)
- Musculus flexor carpi ulnaris (ulnar nerve innervation)
- Musculus flexor digitorum superfiscialis (median nerve innervation)
- Musculus palmaris longus (median nerve innervation)
- Deep flexors:
The incidence of Volkmann’s contracture is low. Its prevalence is 0,5%, which means it is a rare disease. The intracompartmental pressure occurs when there is a bulging caused by a trauma. Thus, there is not enough space for muscles, nerves and blood vessels that lie within this fascia. This results in vascular defects and defects on nerves.
The clinical presentation of Volkmann`s contracture includes what is commonly referred to as the 5 P s. These are pain, pallor, pulselessness, paresthesias, and paralysis. Pain is the earliest sign
- Bleach view at the level of the skin (pallor).
- The wrist is in palmar flexion
- Clawed fingers
- Pain occurs with passive stretching of the flexor
- Palpation of the affected region creates persistent pain (pain)
- It is possible that the pulsations can not be felt in the swollen arm, mainly in the distal part (pulselessness).
- There are also neurological limitations noticeable from the muscles that pinch the neural pathways, there is a decreased sensation (paresthesia) and there is an observable motor deficit (paresis).
Pseudo-Volkmann's contracture 
For a Volkmann’s contraction, the findings are specific as described in the clinical presentation subheading above. The main physical picture that we see is a neurological deficit that occurs in the nerves that pass in the affected regions. The flexion of the wrist is a result of contraction and a loss of innervation.
The deformity seen in this condition can be divided into different levels of severity:
- MILD: Flexion contracture of 2 or 3 fingers with no or limited loss of sensation
- MODERATE: All fingers are flexed and the thumb is oriented in the palmar orientation. The fist, in this case, can remain permanently flexed and there is usually a loss of sensation in the hand.
- SERIOUS: All muscles in the forearm (flexors and extensors) are involved. This is a serious limiting condition.
An objective test to evaluate the ischemia and the pressure in a muscle compartment is an invasive test. It measures the absolute pressure in the compartment of the muscle. This is also called the intracompartimental pressure monitoring (ICP).
Intracompartmental pressure (ICP) can be measured by several means including:
- Wick catheter
- Simple needle manometry
- Infusion techniques
- Pressure transducers
- Side-ported needles
Critical pressure for diagnosing compartment syndrome is unclear
Different authors consider surgical intervention if:
- Absolute ICP greater than 30 mmHg
- Difference between diastolic pressure and ICP greater than 30 mmHg
- Difference between mean arterial pressure and ICP greater than 40 mmHg
Prevention is the best management in this condition. However, there are times, that surgical intervention will be indicated. The majority of Volkmann’s contractures are caused by a supracondylar fracture, and it is essential that all steps are taken to improve the healing of the fracture. When there is an intra-compartment pressure (ICP) of >30 mmHg,an urgent fasciotomy is recommended to avoid further complications, Raised ICP threatens the viability of the limb and compartment syndrome (CS) represents a true medical emergency. Thus, the need for decompression by removal of all dressing down to the skin, followed by fasciotomy- Surgical opening of the fascia around the muscles to make more place for the structures inside. This is done to prevent the onset of Volkmann’s contractures.
In moderate Volkmann's contracture, tendon slide and neurolysis surgery should be performed (median and ulnar) along with extensor transfer procedures.
Finally, in severe cases of Volkmann's contracture, debridement of injured muscle may be performed with releases of scar tissue and salvaging procedures. Range of motion and function after injury are improved by physical and occupational therapy.
By the use of an electromyographic device, the patient can train its affected muscles with cooperativity. The patient is more alert and there is more interaction between the patient and the therapist.
Clinical Bottom Line
Early diagnosis and treatment improve the chances of a successful outcome.
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