Blood gas change PACO2 PAO2=PiO2 0.863×Vco2 PaCO2= PACO2
Blood gas change PACO2 PAO2= PiO2 − —————— R 0.863Vco2 PaCO2= PACO2 = —————— VA
Blood-Gas changes Ventilator Restrictive disorder obstructive Alveolar ventilatory volume PaO2+ and Paco2 f proportionately PaO2↓+PaCO,↑
Blood-Gas changes PaO2 + PaCO2 Ventilatory disorder PaO2 and PaCO2 proportionately Restrictive obstructive Alveolar ventilatory volume
(2)Obstructive ventilatory disorders Tracheobronchial tree narrowing trachea erminal bronchiole right main(primary) bronchus structures are both lungs segmental bronchus For simplicity, nly one lut alveolar ducts d in s alveolar sac this diagram. www.ivyre
(2) Obstructive ventilatory disorders Tracheobronchial tree narrowing
1)Central airway obstruction airway above or below carina Larynx Primary bronchi unas 四
1)Central airway obstruction Variable narrowing Fixed narrowing Airway above or below carina
Variable 类燕热 aspiration expiration outside thorax---inspiratory dyspnea ECb
inspiration expiration Variable outside thorax---inspiratory dyspnea