歲月麻醉

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肥胖是困難插管者嗎?


長久一來,肥胖都被視為是潛在困難插管的族群,但肥胖者是否有比較高的機會遭遇困難插管,而肥胖是否可以是預測困難插管的指標? 答案是否定的!




第一個問題看:Obstructive Sleep Apnea Is Not a Risk Factor for Difficult Intubation in Morbidly Obese Patients.Anesthesia & Analgesia Issue: 2009, 109(4), 1182-1186

180平均BMI為49.4  (OSA Obstructive sleep apnea 指數)AHI(apnea-hypopnea index,>40 視為嚴重)為 31.3,接受減積手術 bariatric surgery患者,在研究期間接受全身麻醉,由資淺住院醫師執行氣管內管插管術,只有6個病患需要超過3次以上的插管嘗試,困難插管率3.3%(整體族群為5~6%),若由CL grade>3為判斷依據,則也只有8.3%。全部沒有插管失敗。


這個研究之所有有這麼好的成績,不得歸功於使用 ramped position ( positioning, with the head, shoulders, and upper body elevated above the chest, is a key component,.準則看外耳道是否高於胸骨凹)



第二個問題看:High body mass index is a weak predictor for difficult and failed tracheal intubation: a cohort study of 91,332 consecutive patients scheduled for direct laryngoscopy registered in the Danish Anesthesia Database.Anesthesiology. 2009 Feb;110(2):266-74.

使用BMI  35 以上為指標陽性指標預測值 predictive value of  positive test 指有6%,敏感性7%,精確性 94%。以體重110以上為指標,陽性預測率只有7%,敏感性6%,精確性95%. 可見單以體重來預測是否困難插管,敏感性是很差的。


ps. 輔助ramped positon 的工具:


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