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Ruptured abdominal aortic aneurysms--prognostic indicators and complications affecting mortality. A local experience
N G Browning1, M A Long, R Barry
1Department of Surgery, University of the Orange Free State, Bloemfontein.
Summary
Ruptured abdominal aortic aneurysms (AAAs) have high mortality. Key risk factors include ischemic heart disease, severe shock on admission, and multiple postoperative complications. Elective repair is crucial for better outcomes.
Area of Science:
- Vascular Surgery
- Surgical Outcomes
- Aortic Aneurysm Research
Background:
- Elective abdominal aortic aneurysm (AAA) repair has a low mortality rate (<5%).
- Ruptured AAAs (rAAAs) carry a significantly higher mortality rate, ranging from 32-85%.
- Understanding prognostic factors and postoperative complications is crucial for improving rAAA outcomes.
Purpose of the Study:
- To identify prognostic factors influencing mortality in ruptured AAA patients.
- To assess the impact of postoperative complications on mortality.
- To determine if specific patient subgroups could be excluded from surgery.
Main Methods:
- Retrospective review of 54 patients with ruptured AAAs.
- Analysis of 49 surgically treated patients (43 males, 6 females; mean age 67).
- Statistical assessment of various clinical factors and their correlation with mortality.
Main Results:
- Operative mortality rate for ruptured AAA was 44%.
- Significant mortality predictors included associated ischemic heart disease (83% mortality), severe shock on admission (BP ≤ 85 mmHg, 66% mortality), and ≥2 postoperative complications (83% mortality).
- Age, time to surgery, fluid therapy, and surgery length did not correlate with mortality.
Conclusions:
- Failure to perform elective AAA repair was identified as a critical correctable error.
- No specific subgroup of patients was clearly identified for exclusion from surgery based on the factors assessed.
- Prognostic factors like ischemic heart disease and shock severity, along with postoperative complications, significantly impact ruptured AAA outcomes.
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