Ischemia

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ischemia

[i′skē·mē·ə]
(medicine)
Localized tissue anemia as a result of obstruction of the blood supply or to vasoconstriction.

Ischemia

 

a local deficiency of blood; insufficient blood in an organ or tissue because of the narrowing or complete occlusion of the lumen of an afferent artery.

Transitory ischemia (like hyperemia) may result from physiological regulation of the blood supply, such as in reflex spasm of an artery caused by a mental factor (fright); the influence of pain, cold, chemical substances (epinephrine, ergotin), and biological stimuli (bacteria, toxins); the obstruction of an artery by a thrombus or embolus; constriction of the lumen of a blood vessel in connection with an atherosclerotic or inflammatory process in the wall; or compression of an artery by a tumor, scar, or foreign body. The aftereffects of ischemia depend on the degree of disruption of the blood flow, the rate of development and duration of the ischemia, the sensitivity of the tissue to oxygen deficiency, and the general condition of the body. Ischemia may end in complete restoration of the structure and function of the affected organ or tissue, but it also may lead to necrosis (infarct). The central nervous system and heart muscle are particularly sensitive to ischemia.

N. R. PALEEV

References in periodicals archive ?
16) Furthermore, some of these patients demonstrating vascular abnormalities prior to developing bowel ischemia can be treated before they develop the devastating downstream effects of infarction (Figure 6).
In this preliminary report, we observed 4 of 7 patients with borderline bowel ischemia treated in the last 10 years of our 50.
2 Clostridium difficile colitis 3 Ischemic colitis 4 Crohn disease after ileocecal resection 5 Diverticulosis 6 Diverticulosis 7 NA 8 Volvulus, bowel ischemia 9 To rule out lymphoma?
With the addition of 122 cases of STME for lower GI hemorrhage from the literature, minor ischemia occurred in 13 (21%) of 62 patients who were evaluated objectively for bowel ischemia.
Uses include treating and preventing abdominal compartment syndrome, trauma, ruptured AAA, intra-abdominal infections, intra-abdominal hemorrhage, pancreatitis, bowel ischemia, multiple adhesions, enteric fistulas, loss of fascia, and failed hernia repairs with meshes.
Bleeding also may occur during the progression of small bowel ischemia.
Damage to the mesentery can produce extensive irreversible small bowel ischemia requiring resection.
Small bowel ischemia due to jejunum volvulus in pregnancy: a case report.
This makes them a potentially suitable biomedical predictor of small bowel ischemia.
Again three months after the accident patient presented with abdominal pain and vomiting and was diagnosed as small bowel obstruction with bowel ischemia.