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Coagulopathy in Ruptured or Dissecting Aortic Aneurysms
Insights
Consumption coagulopathy, a clotting disorder, was observed in patients with aortic aneurysms. This finding aids in differentiating aortic aneurysms from similar acute conditions.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Pathology
Background:
- Ruptured or dissecting aortic aneurysms present with acute symptoms that can mimic other serious conditions.
- Coagulation disorders, such as consumption coagulopathy, can arise in critical vascular events.
Purpose of the Study:
- To investigate the presence and characteristics of consumption coagulopathy in patients with aortic aneurysms.
- To assess the diagnostic utility of this coagulation disorder in differentiating aortic aneurysms.
Main Methods:
- Analysis of coagulation parameters in four patients with ruptured or dissecting aortic aneurysms.
- Measurement of prothrombin time and detection of fibrin/fibrinogen degradation products.
- Utilized 125I-fibrinogen to assess local accumulation of clotting factors at the lesion site.
Main Results:
- All four patients exhibited consumption coagulopathy.
- Key features included prolonged prothrombin time due to decreased clotting factors and formation of fibrin/fibrinogen degradation products.
- Increased local radioactivity of 125I-fibrinogen suggested accumulation of clotting factors at the aneurysm site.
Conclusions:
- Consumption coagulopathy is a significant finding in patients with aortic aneurysms.
- Identifying this coagulation disorder can be a valuable diagnostic aid for aortic aneurysms.
- The findings suggest a potential mechanism involving local accumulation of clotting factors at the site of the arterial lesion.
Abstract:
A consumption coagulopathy was demonstrated in each of four patients with either ruptured aneurysm of the aorta or a dissecting aortic aneurysm. The most prominent features of this disorder were (1) a prolonged prothrombine time due to a decrease of one or more clotting factors, and (2) formation of fibrin and fibrinogen degradation products. Recognition of this coagulation disorder could be a valuable diagnostic tool to differentiate a ruptured or dissecting aortic aneurysm from other conditions with a similar acute onset. The coagulation disorder could be due to liberation of coagulant material from the aortic wall into the circulation or to an accumulation of clotting factors at the site of the lesion, secondary to the local exposition of tissue factors from the torn arterial wall. The probability of the latter mechanism is suggested by the local increase of radioactivity after the injection of 125I-fibrinogen.