一位 30 歲的健康男性肺活量(vital capacity, VC)為 5 L,潮氣容積(tidal volume, VT)為 0.5 L,吸氣量(inspiratory capacity, IC)為 3.5 L,功能肺餘量(functional residual capacity, FRC)為 2.5 L,則其呼氣儲備容積(expiratory reserve volume, ERV)為何?
A1.0 L
B1.5 L正確答案
C2.0 L
D3.5 L
答案與詳解
ERV = VC - IC = 5.0 - 3.5 = 1.5 L。也可驗證:RV = FRC - ERV = 2.5 - 1.5 = 1.0 L;VC = IC + ERV = 3.5 + 1.5 = 5.0 L,與題目一致,正確。
