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Small vessel occlusion in acute acalculous cholecystitis
1Department of Surgery, Tygerberg Hospital/University of Stellenbosch, South Africa.
Surgery
|February 1, 1992
Summary
Acute acalculous cholecystitis involves gallbladder ischemia. Arteriography revealed arterial occlusions in acute acalculous cholecystitis, unlike gallstone-associated cases, suggesting a key role for vascular compromise.
Area of Science:
- Gastroenterology
- Vascular Surgery
- Pathophysiology
Background:
- Acute acalculous cholecystitis (AAC) is a severe gallbladder inflammation without gallstones.
- Ischemia is a suspected mechanism in AAC pathogenesis.
- Understanding vascular changes is crucial for diagnosing and treating AAC.
Purpose of the Study:
- To compare cystic artery blood flow in normal, gallstone-associated, and acalculous cholecystitis using gallbladder arteriography.
- To identify specific arteriographic findings associated with AAC.
- To elucidate the role of ischemia in AAC.
Main Methods:
- Gallbladder specimen arteriography was performed on three groups: macroscopically normal gallbladders (n=10), acute gallstone-associated cholecystitis (n=10), and acute acalculous cholecystitis (n=7).
- Standardized contrast medium and film exposure ensured objective comparison.
- Arterial and venous filling patterns were analyzed.
Main Results:
- Acute gallstone-associated cholecystitis showed arterial dilatation and venous filling compared to normal gallbladders.
- Acute acalculous cholecystitis consistently displayed multiple arterial occlusions with minimal or absent venous filling.
- The severity of arteriographic abnormalities in AAC correlated with gallbladder pathology.
Conclusions:
- Arterial occlusion is a hallmark of acute acalculous cholecystitis.
- Small vessel occlusion, potentially due to low splanchnic flow or coagulation, is fundamental to AAC pathogenesis.
- Arteriography can differentiate AAC from gallstone-associated cholecystitis based on vascular patterns.