呼吸衰竭 Respiratory failure
外呼吸 呼吸功能
气体运输 外呼吸 呼吸功能 内呼吸
、概念与分类( Concept& Classification) 1.呼吸衰竭( Respiratory Failure) 在海平面静息状态吸入空气的情况下,由于肺通气和(或)换 气功能的严重障碍,以致P尸aO2低于8.0kPa(<60mmHg),伴有或 不伴有PaCO2高于6.67kPa(50mmHg)的病理过程。 Respiratory failure is a syndrome in which the respiratory system fails in one or both of its gas exchange functions oxygenation and carbon dioxide elimination In practice, respiratory failure is defined as a Pao2 value of less than 60 mm Hg while breathing air or a Paco2 of more than 50 mm Hg. (mmHg=millimeter hydrargyrum
Concept & Classification Respiratory failure is a syndrome in which the respiratory system fails in one or both of its gas exchange functions: oxygenation and carbon dioxide elimination. In practice, respiratory failure is defined as a PaO2 value of less than 60 mm Hg while breathing air or a PaCO2 of more than 50 mm Hg. （mmHg=millimeter hydrargyrum）
【呼吸衰竭指数】( Respiratory failure index,RF|) 计算公式 RF|=PaO/FiO2(100/0.2) RF|≤300可诊断为呼吸衰竭 【呼吸功能不全】( Respiratory insufficiency) ▲PaO2或PaCO2个没有达到上述水平,或在静息时血气 值正常。 ▲没有明显的临床症状,但当体力负荷增加时PaO2才明显 降低或伴有PaCO2水平增高
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2. Classification (1) According to Paco 2 a(Type 1) respiratory failure Hypoxemic respiratory failure a Pao2 of less than 60 mm Hg with a normal or low Paco2 Cause of: Edema. vascular disease. Chest Wall& Pleural disease a(Type ll)respiratory failure( Hypercapnic respiratory failure - a Pao2 low 60 mm Hg and PaCcO, of more than 50 mm Hg Cause of: Airway obstruction, Neuromuscular disease
Type Hypercapnic respiratory failure） a PaO2 low 60 mm Hg and PaCO2 of more than 50 mm Hg. Cause of：Airway obstruction, Neuromuscular disease. Type I Hypoxemic respiratory failure） a PaO2 of less than 60 mm Hg with a normal or low PaCO2 . Cause of：Edema, Vascular disease, Chest Wall & Pleural disease