I71.33

Clinical Causes: Atherosclerosis, which leads to the narrowing and weakening of the arterial walls. Genetic factors and family history of aneurysms. High blood pressure, increasing stress on the blood vessel walls. Injury or trauma to the abdomen or pelvis. Infections that affect the arterial wall, such as syphilis. Connective tissue disorders like Marfan syndrome or Ehlers-Danlos syndrome. Lifestyle factors such as smoking, which significantly increases risk.

Key Symptoms: Sudden, severe abdominal or back pain that may be described as tearing or ripping. A pulsatile mass or bulge in the abdomen that can sometimes be felt during a physical exam. Signs of shock, including rapid heartbeat, low blood pressure, and cold, clammy skin. Nausea or vomiting. Lightheadedness or dizziness. Loss of consciousness in severe cases. Symptoms of internal bleeding, such as pallor or weakness.

Diagnosis Path: Diagnosis typically involves a combination of medical history and physical examination, followed by imaging studies. Common diagnostic tools include: - Ultrasound: An initial, non-invasive test that can detect aneurysms. - Computed Tomography (CT) scan: Provides detailed images to confirm the size and extent of the aneurysm and any rupture. - Magnetic Resonance Imaging (MRI): An alternative imaging method, especially if radiation exposure is a concern. Prompt diagnosis is critical in ruptured cases to guide immediate management and surgical intervention.

Treatment Protocols: Treatment of a ruptured infrarenal AAA is a medical emergency requiring rapid intervention. Approaches include: - Emergency Surgery: Usually involves open surgical repair to replace the damaged segment of the aorta with a graft. - Endovascular Aneurysm Repair (EVAR): A minimally invasive option, where a stent graft is inserted through blood vessels to reinforce the weakened section. Post-treatment care includes intensive monitoring for bleeding, infection, and organ function. Long-term management focuses on controlling risk factors to prevent future aneurysms or complications. In some cases, if detected early and unruptured, elective surgery might be performed to prevent rupture, primarily based on aneurysm size and growth rate.