sān āo zhēng
three depressions sign[湘雅毉學專業詞典]
三凹征(three depressions sign)是吸氣性呼吸睏難的典型症狀。表現爲吸氣時出現明顯的胸骨上窩、鎖骨上窩和肋間隙凹陷。