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Acute mesenteric ischemia
1Second Department of Surgery, Tokyo Medical and Dental University, Japan.
Abstract:
Acute mesenteric ischemia is becoming an increasing cause of death in old patients with generalized atherosclerosis. Pathogenetically, this condition presents as poor splanchnic perfusion, with or without occlusion of the major visceral vessels. Because the patient manifests such nondescript abdominal pain and the physical examination reveals few abdominal signs, it is therefore extremely difficult to make an accurate diagnosis in the early stage of the disease. Furthermore, laboratory studies and X-ray examinations are usually noncontributory. It is therefore necessary to keep this lesion in mind, whenever examining the old patient with severe unexplained abdominal pain. Selective arteriography is essential for differentiating occlusive ischemia from non-occlusive, however, the recent advances in medical imaging and minute flowmetry make it possible to detect intestinal lesions and the state of visceral perfusion, transcutaneously, in the early stage of the disease. Emergency revascularization is mandatory for an occlusive lesion, but it is not indicated in the early stage of non-occlusive disease, and requires support of cardiac failure, hypovolemia, septic shock and lowered splanchnic perfusion.
Insights
Acute mesenteric ischemia, a serious condition in elderly patients with atherosclerosis, is hard to diagnose early due to vague symptoms. Advanced imaging aids in early detection and management of visceral perfusion issues.
Area of Science:
- Vascular Surgery
- Gastroenterology
- Geriatric Medicine
Background:
- Acute mesenteric ischemia is a growing cause of mortality in elderly patients, often linked to generalized atherosclerosis.
- The condition involves poor splanchnic perfusion, potentially with visceral vessel occlusion, presenting with subtle symptoms and signs.
- Early diagnosis is challenging due to non-specific abdominal pain and limited findings on physical examination, laboratory tests, and X-rays.
Purpose of the Study:
- To highlight the diagnostic difficulties of acute mesenteric ischemia in elderly patients.
- To discuss the role of advanced imaging in early detection.
- To outline management strategies for occlusive versus non-occlusive mesenteric ischemia.
Main Methods:
- Review of pathological mechanisms and diagnostic challenges.
- Discussion of selective arteriography's role.
- Emphasis on recent advances in medical imaging and minute flowmetry for transcutaneous detection.
Main Results:
- Early diagnosis of acute mesenteric ischemia is often delayed due to non-specific clinical presentation.
- Advanced imaging techniques and minute flowmetry offer potential for earlier, non-invasive detection of intestinal lesions and visceral perfusion status.
- Selective arteriography remains crucial for differentiating occlusive from non-occlusive ischemia.
Conclusions:
- Acute mesenteric ischemia requires high clinical suspicion in elderly patients with unexplained abdominal pain.
- Non-invasive imaging modalities are improving early detection capabilities.
- Management differs significantly between occlusive (requiring revascularization) and non-occlusive (requiring supportive care) mesenteric ischemia.