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呼吸衰竭由多种原因(如疾病、创伤、药物作用等)所引起的一种病理过程。一般认为:当病人在海平面,静息状态吸入空气的情况下,无心内右向左分流而动脉血氧分压(PaO_2)低于60毫米汞柱;不是由于呼吸对代谢性硷中毒的代偿而动脉血二氧化碳分压(PaCO_2)超过50毫米汞柱,即为呼吸衰竭。临床上有的病人有明显的呼吸困难,却不一定都是呼吸衰竭。同时,注意呼吸衰竭不要与呼吸功能不全相混淆,呼吸功能不全是指患者在休息时 PaO_2和 PaCO_2仍在正
Respiratory failure A pathological process caused by a variety of causes such as illness, trauma, medication, etc. It is generally believed that when the patient inhales air at sea level and in resting state, there is no right-to-left shunt and the arterial partial pressure of oxygen (PaO_2) is less than 60 mmHg. This is not due to the generation of metabolic alkalosis Compensation and arterial partial pressure of carbon dioxide (PaCO_2) more than 50 mm Hg, which is respiratory failure. Some patients have clinically obvious dyspnea, but not necessarily all respiratory failure. At the same time, pay attention to respiratory failure should not be confused with respiratory insufficiency, respiratory insufficiency refers to patients at rest PaO_2 and PaCO_2 are still positive