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一般认为于海平面高度,在休息状态下,呼吸空气时,若P_2O_2低于60mmHg,PaCO_2高于50mmHg,即为呼吸衰竭。依病情的急缓分急性呼吸衰竭和慢性呼吸衰竭。有的慢性呼吸衰竭患者能够代偿适应,虽有动脉血气异常,但仍能担任轻微工作,或照常生活,称为代偿性慢性呼吸衰竭。若因并发呼吸道感染,通气功能进一步损害,出现缺氧及CO_2潴留,称失代偿性慢性呼吸衰竭或慢性呼吸衰竭急性发作。呼吸衰竭均有低氧血症,但不一定同时伴有CO_2潴留。根据呼吸道病变的性质及有无动脉血的CO_2潴
Generally considered at sea level, at rest, breathing air, if P_2O_2 below 60mmHg, PaCO_2 higher than 50mmHg, is respiratory failure. According to the rapid onset of acute respiratory failure and chronic respiratory failure. Some patients with chronic respiratory failure can be compensated, despite arterial blood gas abnormalities, but still can serve as minor work, or as usual, known as compensatory chronic respiratory failure. Ruoyin complicated by respiratory infections, further damage to ventilation, hypoxia and CO_2 retention, said decompensated chronic respiratory failure or acute episode of chronic respiratory failure. Respiratory failure have hypoxemia, but not necessarily accompanied by CO_2 retention. According to the nature of respiratory disease and the presence or absence of arterial CO2 retention