下列檢查數值何者無法協助鑑別stridor與tracheomalacia診斷?
AFEF $_{50}$ (forced expiratory flow at 50% VC)
BFIF $_{50}$ (forced inspiratory flow at 50% VC)
CFEF 25-75 (forced expiratory flow between 25%\~75% VC)正確答案
D$\mathrm{FEF}_{50} / \mathrm{FIF}$ ratio
答案與詳解
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