S35.22 Injury of superior mesenteric artery

Name of the Condition

• Injury of superior mesenteric artery

Summary

An injury of the superior mesenteric artery involves damage to the major blood vessel supplying the mid-abdominal organs, typically resulting from trauma or other pathological processes. This condition requires prompt evaluation to assess vascular integrity and prevent complications such as hemorrhage or ischemia of the supplied organs.

Causes

Direct trauma to the abdomen, such as from motor vehicle accidents, falls, or penetrating injuries. Blunt force impact or crush injuries that disrupt the arterial wall. Iatrogenic causes, including surgical procedures or medical interventions in the abdominal region.

Risk Factors

• Participation in high-risk activities with potential for abdominal trauma.
• Occupations involving exposure to machinery or environments with crush hazards.
• Pre-existing vascular conditions that may predispose to injury.
• Advanced age, which can affect tissue elasticity and healing.

Symptoms

• Severe abdominal pain, particularly in the mid-abdomen.
• Signs of internal bleeding, such as hypotension or tachycardia.
• Abdominal distension or rigidity.
• Altered skin temperature or sensation in the extremities.
• Possible pulsatile mass or hematoma in the abdomen.

Diagnosis

Physical examination to assess for signs of trauma or hemodynamic instability. Imaging studies, such as CT angiography, to evaluate vascular injury and organ perfusion. Laboratory tests to detect signs of hemorrhage or ischemia.

Treatment Options

Surgical repair or endovascular intervention to restore arterial integrity. Hemodynamic stabilization with fluid resuscitation or blood transfusion. Monitoring for complications such as bowel ischemia or infection.

Prognosis and Follow-Up

Prognosis depends on the severity of the injury and timeliness of treatment. Regular follow-up to assess for delayed complications, such as aneurysm formation or chronic ischemia. Imaging may be repeated to monitor vascular healing.

Complications

Hemorrhage, leading to shock or organ failure. Bowel ischemia or infarction due to reduced blood flow. Infection or abscess formation at the injury site. Long-term vascular complications, such as stenosis or pseudoaneurysm.

Lifestyle & Prevention

Avoid high-risk activities that increase the likelihood of abdominal trauma. Use protective equipment in hazardous occupations. Maintain overall vascular health through regular exercise and a balanced diet. Promptly address any abdominal injuries to prevent progression.

When to Seek Professional Help

Seek immediate medical attention for severe abdominal pain, signs of internal bleeding, or trauma to the abdomen. Persistent symptoms after an injury, such as abdominal distension or fever, warrant evaluation.

Tips for Medical Coders

Document the mechanism of injury (e.g., blunt vs. penetrating) and any associated complications. Include details on diagnostic imaging or interventions performed. Ensure the injury is clearly linked to the superior mesenteric artery and not other vascular structures.