| 词汇 | reperfusion |
| 释义 | reperfusion noun[ U ] medical specializeduk /riː.pəˈfjuː.ʒən/ us /ˌriː.pɚˈfjuː.ʒən/ the action of making blood flow return to normal after the supply has been cut off, especially after a heart attack or stroke: （尤指在心脏病发作或中风之后使血液循环恢复正常的）再灌注 Reperfusion measures work best if they are started within 30 minutes after symptoms start.在症状发生后30分钟内做再灌注效果最好。 Examples of reperfusionreperfusion Although myocardial reperfusion can rescue the number of necrotic cardiac myocytes, it is critically dependent upon the time of intervention after ischaemic insult. The effect of oxygen radicals during reperfusion producing peroxidation and cellular injury is well described for other tissue beds during normothermia. And finally a reperfusion injury characterized by free radical formation and oxidative stress. This difference was particularly marked at 30 minutes, 60 minutes, and 90 minutes of reperfusion. Other laboratory studies have supported our finding of differential regional reperfusion. There are no additional studies, either animal or clinical, which discuss the time of reperfusion necessary to replete cerebral stores of energy to normal. The permeability of the blood-brain barrier was highly increased by ischemia/reperfusion. With the resumption of blood flow, the subsequent reperfusion produces large quantities of superoxide radical and hydrogen peroxide. Alternatively, excess formation of oxygen radicals after arrest associated with reperfusion may cause or exacerbate cerebral injury. Our findings of differential regional reperfusion following hypothermic circulatory arrest also have important implications. Addition of insulin to those solutions may be beneficial to protect immature myocardium from hypothermic, ischemic or reperfusion injury. Compared to sham controls, myelin processes began to degenerate at 12 hours reperfusion, with a significant loss of intact processes by 48 hours. Taken together, these findings illustrate that the brain has a heterogeneous response to ischemia and reperfusion injury. Following cerebral ischemia and reperfusion there is a downregulation of the protein synthesis machinery and translation arrest. Rewarming is commenced, and, during reperfusion, pacemaker wires are placed on the atrium and ventricle, and a pulmonary venous catheter is inserted. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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