6.當使用正壓通氣且使用肌肉鬆弛劑情況下,於吸氣末期,下列各壓力間相互關係之敘述,何者正 確?
(A)氣道開口壓力(pressure at the airway opening)等於體表壓力(body surface pressure)
(B)肺泡壓力(alveolar pressure)低於肋膜壓力(pleural pressure)
(C)肋膜壓力(pleural pressure)高於體表壓力(body surface pressure)
(D)氣道開口壓力(pressure at the airway opening)低於肺泡壓力(alveolar pressure)
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統計: A(121), B(19), C(112), D(44), E(0) #3491434
統計: A(121), B(19), C(112), D(44), E(0) #3491434
詳解 (共 1 筆)
#7634953

呼原 P. 4-5
注意正壓通氣下"吸氣末"肺泡壓、肋膜壓均是正值 (Pbs = 0 大氣壓),依照此圖表來進行解題
(A) 氣道開口壓力(pressure at the airway opening)等於體表壓力(body surface pressure)
正壓通氣下Pawo > 0 (Pbs) (B) 肺泡壓力(alveolar pressure)低於肋膜壓力(pleural pressure)
肺泡壓要大於肋膜壓,否則肺泡會塌陷
(C) 肋膜壓力(pleural pressure)高於體表壓力(body surface pressure)
(D) 氣道開口壓力(pressure at the airway opening)低於肺泡壓力(alveolar pressure) 吸氣末氣流停止,此時氣道內的壓力會與肺泡壓力達成平衡,因此 Pao ≈ Palv
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