Preoperative CT in symptomatic abdominal aortic aneurysms: accuracy and efficacy

Area of Science:

• Vascular Surgery
• Diagnostic Imaging

Background:

• Abdominal aortic aneurysms (AAAs) pose significant health risks.
• Rupture of AAAs is a life-threatening emergency.
• Optimal preoperative assessment and preparation are crucial for AAA surgery outcomes.

Purpose of the Study:

• To evaluate the diagnostic accuracy of preoperative CT scans in identifying AAA rupture.
• To assess the mortality rates associated with the surgical management of symptomatic AAAs, both ruptured and unruptured.

Main Methods:

• Retrospective review of 80 patients undergoing AAA operations.
• Analysis of CT scan results for 23 patients, focusing on sensitivity and specificity for rupture detection.
• Comparison of mortality rates between ruptured and unruptured symptomatic AAA patients, considering preoperative preparation time.

Main Results:

• CT scans demonstrated high accuracy for detecting AAA rupture (sensitivity 0.9, specificity 1.0).
• Mortality for ruptured AAAs was 22% among symptomatic patients.
• Mortality for unruptured symptomatic AAAs, even with expedited preparation (approx. 36 hours), was 30%, primarily due to cardiac complications.

Conclusions:

• Preoperative CT scans are highly effective in diagnosing AAA rupture.
• Surgical intervention for symptomatic unruptured AAAs, despite rapid preparation, is associated with substantial postoperative mortality, largely driven by cardiac issues.
• Limited preoperative preparation does not appear to reduce the high operative mortality for emergently repaired unruptured symptomatic AAAs.