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Rodent Model of Intestinal Ischemia-Reperfusion Injury via Occlusion of the Superior Mesenteric Artery
Published on: October 20, 2023
Acute mesenteric ischaemia
Abstract:
The experience of acute mesenteric ischaemia at St Vincent's Hospital, Melbourne, has been reviewed over 17 years. The mortality remains appallingly high. This applies particularly to those patients who had thrombosis of the superior mesenteric artery, amongst whom the mortality in this series was 97%. The mortality was slightly less in the group suffering from embolic occlusion of the superior mesenteric artery (66%), and in those suffering from thrombosis of the superior mesenteric vein (60%). A mortality of 66% was also found in patients suffering from non-occlusive gut ischaemia. Delay in diagnosis accounted for this high mortality. Early diagnosis is all-important, and this depends on the performance of mesenteric angiography in any patient suspected of having mesenteric ischaemia. Appropriate surgery may then be carried out in the occlusive group and supportive treatment, including intraarterial papaverine infusion, given to those with non-occlusive ischaemia. There is a pressing need for simple non-invasive tests to segregate those patients suffering from acute mesenteric ischaemia from those whose acute abdomen is due to some other cause.
Insights
Acute mesenteric ischemia has a high mortality rate, especially with superior mesenteric artery thrombosis (97%). Early diagnosis via mesenteric angiography is crucial for timely intervention and improved patient outcomes.
Area of Science:
- Gastroenterology
- Vascular Surgery
- Emergency Medicine
Background:
- Acute mesenteric ischemia presents a significant diagnostic and therapeutic challenge.
- Review of 17 years of experience at St Vincent's Hospital, Melbourne, highlights persistently high mortality rates.
Purpose of the Study:
- To analyze the outcomes of acute mesenteric ischemia over a 17-year period.
- To identify factors contributing to high mortality and emphasize the need for early diagnosis.
Main Methods:
- Retrospective review of patient data for acute mesenteric ischemia.
- Analysis of mortality rates based on the cause of ischemia (arterial thrombosis, embolic occlusion, venous thrombosis, non-occlusive).
Main Results:
- Overall mortality for acute mesenteric ischemia remains high.
- Superior mesenteric artery thrombosis had a 97% mortality rate.
- Embolic occlusion (66%), superior mesenteric vein thrombosis (60%), and non-occlusive ischemia (66%) also showed high mortality.
Conclusions:
- Delay in diagnosis is a primary driver of mortality in acute mesenteric ischemia.
- Mesenteric angiography is essential for early diagnosis and guiding treatment (surgery for occlusive, supportive/papaverine for non-occlusive).
- Development of simple, non-invasive tests is urgently needed to differentiate mesenteric ischemia from other acute abdominal conditions.
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