S55.0

Clinical Causes: Blunt trauma to the forearm, such as falls or impact injuries Deep cuts or lacerations from sharp objects like knives or glass Penetrating injuries from animal bites or projectiles Surgical complications or iatrogenic injuries during medical procedures Crush injuries from heavy objects or machinery

Key Symptoms: Pain and tenderness along the inner side of the forearm Swelling and possible bruising in the affected area Bleeding from a wound or puncture site Weakness or numbness in the hand or fingers Change in skin color, such as pallor or a bluish tint Reduced pulse or absence of a pulse in the ulnar artery at the wrist Signs of tissue ischemia if blood supply is severely compromised

Diagnosis Path: Diagnosing an injury of the ulnar artery involves a comprehensive clinical examination and diagnostic tests, such as: - Physical assessment to check for absent or weak pulses in the ulnar artery - Doppler ultrasound to evaluate blood flow - Angiography, an imaging technique that visualizes blood vessels - X-rays or other imaging if trauma involves associated bone injuries Early diagnosis is crucial to prevent complications like tissue death or permanent nerve damage.

Treatment Protocols: Management of ulnar artery injury depends on the severity of the damage: - **Initial stabilization** includes controlling bleeding, immobilizing the limb, and preventing infection. - **Surgical intervention** may be necessary to repair or reconstruct the damaged artery. - **Vascular repair procedures** include suturing the damaged vessel or grafting if necessary. - **Conservative management** such as compression and observation may be appropriate for minor injuries. - Post-treatment involves monitoring for signs of reperfusion and potential complications, along with physiotherapy to regain function. Prompt medical attention is essential to optimize outcomes and prevent long-term disability.