词汇 | hypoxia |
释义 | hypoxia noun[ U ] specializeduk /haɪˈpɒk.si.ə/ us /haɪˈpɑːk.si.ə/ medical a condition in which there is not enough oxygen available to the blood and body tissues: 缺氧 Doctors are learning more about the threat that affects every airline passenger: hypoxia, the term for too little oxygen. After major surgery hypoxia can occur for up to for 3 days, particularly at night. biology, chemistry, environment a situation in which there is not enougth oxygen in a place or environment: His team studied fish in an estuary suffering hypoxia. Hypoxia is an oxygen deficiency in water that threatens the survival of many species. Related word hypoxic Compare anoxia Hypoxia contributes to resistance to some drugs and radiotherapy. With generalized hypoxia, the entire body is suffering from inadequate oxygen. Causes of death were cardiac failure, hypoxia and severe arrhythmias. Disorders & diseases of the heart & blood acidosis acquired agammaglobulinemia adult-onset diabetes afib agammaglobulinemia anaemic apoplexy clot-busting coarctation of the aorta congenital erythropoietic porphyria congestive heart failure coronary heart disease decompression sickness furred MGUS mini-stroke mitral monoclonal gammopathy of unknown significance monocyte disorder toxaemia You can also find related words, phrases, and synonyms in the topics: Biochemistry Environmental issues Examples of hypoxiahypoxia For example, pre-adaptation to cold may protect against subsequent exposure to ionizing radiation (positive acclimation), but may increase vulnerability to hypoxia (negative acclimation). Although vasodilatation may improve peripheral blood flow, it may also cause shunting which can result in regional tissue hypoxia. These results indicate that at least in the acute situation hypoxia alone does not generate the markers of oxidative stress that typify the preeclamptic placenta. The cave's entrance became buried, and inadequate ventilation caused an episode of hypoxia and carbon monoxide poisoning. Five infants had hypoxia <40 torr and 5 needed a continuous infusion of epinephrine >1 ng/kg/min. Five infants had hypoxia <40 torr and 5 needed a continuous infusion of epinephrine >1 tig/kg/min. Right ventricular dysfunction has been attributed either to persisting high right ventricular afterload or to chronic myocardial hypoxia prior to repair. Factors that promote cellular dehydration, tissue hypoxia, and leukocyte or endothelial cell activation are all involved in generating vaso-occlusion. Also, gas exchange is affected, with a reduced awareness of the response to hypoxia and hypercapnia as described later. Relative hypoxia is a potent vasodilator in the coronary, cerebral, and adrenal beds, but a vasoconstrictor in the pulmonary bed. In mammals, nitric oxide stimulates increased blood flow to areas where hypoxia occurs. This exacerbates hypoxia, which can promote tumour angiogenesis by enhancing the production of proangiogenic factors. End-stage hypoxia in this condition is manifest by a score of either 2/10 or 0/10. In contrast, the effects of striatal injuries are evident in childhood, and the caudate is highly vulnerable to hypoxia and ischemia. This process, in addition to sustained or episodic hypotension may induce cerebral hypoperfusion, ischaemia and hypoxia. See all examples of hypoxia 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. |
随便看 |
|
反思网英语在线翻译词典收录了377474条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。