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Reperfusion injury, sometimes called ischemia-reperfusion injury (IRI) or reoxygenation injury, is the tissue damage caused when blood supply returns to tissue (re-+ perfusion) after a period of ischemia or lack of oxygen (anoxia or hypoxia).
This reperfusion results in inflammatory injury through three overlapping mechanisms. Some complimentary combination of, first, mitochondrial damage and, second, endothelial activation , causes a release of reactive oxygen species (ROS), which initiates and/or exacerbates a pathophysiological inflammatory response.
Ischemia-reperfusion (IR) tissue injury is the resultant pathology from a combination of factors, including tissue hypoxia, followed by tissue damage associated with re-oxygenation. IR injury contributes to disease and mortality in a variety of pathologies, including myocardial infarction , ischemic stroke , acute kidney injury , trauma ...
Restoration of blood supply to ischemic tissues can cause additional damage known as reperfusion injury that can be more damaging than the initial ischemia. Reintroduction of blood flow brings oxygen back to the tissues, causing a greater production of free radicals and reactive oxygen species that damage cells.
Reperfusion injury, i.e., postpulmonary thromboendartectomy or lung transplantation Swimming induced pulmonary edema also known as immersion pulmonary edema [ 23 ] [ 24 ] [ 25 ] Transfusion associated Acute Lung Injury is a specific type of blood-product transfusion injury that occurs when the donors plasma contained antibodies against the ...
The most common cause of reoperation is a leaky pulmonary valve (pulmonary valve insufficiency). [61] This is usually corrected with a procedure called pulmonary valve replacement. [24]: 136 One common prognostic factor with TOF is the development of ischemia reperfusion injury. Insufficient myocardial protection is considered one of the main ...
Reperfusion is the restoration of blood flow to an organ or tissue after having been blocked, and may refer to: Reperfusion injury , tissue damage caused when blood supply returns to the tissue Reperfusion therapy , the medical treatment that restores blood flow through blocked arteries, typically after a heart attack
There are several proposed mechanisms for this phenomenon. One mechanism suggests that toxins build up in the pooled blood, and problems arise when this toxin-rich, oxygen-poor blood returns to the body when the patient is allowed to lie down. Another mechanism suggests that the sudden increase in preload causes acute heart failure.