Aetiology
Laceration of the superficial palmar arch is an injury to the vascular network of the palm of the hand. It is typically caused by a sharp or deep cut, or by a crush injury.
Diagnosis
The diagnosis of a laceration of the superficial palmar arch is usually made by physical examination. The patient may report numbness, tingling, or a loss of sensation in the thumb and other fingers. The wound itself may be visible, and the physician may be able to feel a defect in the arch.
Differential diagnosis
Other causes of numbness or tingling in the thumb and other fingers include carpal tunnel syndrome, cervical radiculopathy, and peripheral neuropathy.
Treatment
Treatment of a laceration of the superficial palmar arch typically involves surgical repair of the wound. The wound is carefully closed, and the structures of the arch are reconstructed. The repair should be done as soon as possible to limit the risk of infection, nerve injury, and other complications.
Prognosis
The prognosis for a laceration of the superficial palmar arch is generally good, provided the wound is repaired promptly and properly. Most patients regain full or near-full function of the hand following surgery.