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1) 维持急慢性呼衰时的气体交换。①限制性肺部疾病:肺炎、急性心源性肺水肿和成人呼吸窘迫综合征所致急性呼衰采用间歇性正压通气(IPPV/IMV),不论有无呼气末正压(PEEP),一般均能取得良好效果。②阻塞性肺部疾病:近来对哮喘状态推荐用可控制性低通气量,使PaCO_2降至临床允许的高值,机械通气可有支气管扩张药、类固醇药的类似作用,为支气管镜检查提供条件,并可预防酸血症。③神经肌肉和胸壁病变:IPPV可用于长时间慢性呼衰。据报道,应用家庭夜间通气(DNV)的生存期达13年之久。这与DNV减轻呼吸肌疲劳,改善呼吸肌氧供和氧耗有关。④中枢神经
1) Maintaining gas exchange during acute and chronic respiratory failure. (1) Restrictive pulmonary disease: IPPV / IMV is an acute respiratory failure caused by pneumonia, acute cardiogenic pulmonary edema and adult respiratory distress syndrome, with or without positive end-expiratory pressure (PEEP) Generally can achieve good results. ② obstructive pulmonary disease: the recent state of asthma recommend the use of controlled low ventilation, PaCO_2 dropped to the clinical allowable high value, mechanical ventilation may bronchodilator drugs, steroid drugs similar to provide the conditions for bronchoscopy , And can prevent acidosis. ③ neuromuscular and chest wall lesions: IPPV can be used for chronic chronic respiratory failure. According to reports, the application of home night ventilation (DNV) survival of up to 13 years. This is DNV to reduce respiratory muscle fatigue, improve respiratory oxygen and oxygen consumption related. Central nervous system