Related Experiment Videos
Aortic blebs: possible site of aneurysm rupture
G C Hunter1, S C Leong, G S Yu
1Department of Surgery, Veterans Administration Medical Center, Tucson, AZ 85723.
Journal of Vascular Surgery
|July 1, 1989
Summary
Localized blebs in abdominal aortic aneurysms, filled with thrombus and showing wall weakening, may precede rupture. CT scanning may help identify these defects, suggesting the need for surgical intervention.
Area of Science:
- Vascular Surgery
- Cardiovascular Pathology
Background:
- Abdominal aortic aneurysm (AAA) growth and rupture are often explained by Laplace's law.
- The precise mechanisms leading to AAA rupture remain incompletely understood.
Observation:
- Local excrescences or blebs were observed in the walls of abdominal aortic aneurysms in 4 out of 5 patients.
- These protrusions were surgically removed from 6 patients.
Findings:
- Histological examination revealed thrombus-filled blebs with marked aortic wall attenuation and focal loss of elastic fibers.
- Inflammatory infiltrates, including lymphocytes, plasma cells, and multinucleate giant cells, were present in the blebs.
Implications:
- These blebs and their pathological characteristics suggest a potential mechanism for AAA rupture.
- Abdominal CT scanning may identify these defects, potentially indicating a need for prompt surgical intervention.
- Further clinicopathologic studies are required to confirm these localized defects as a cause of rupture.