Ultrasound-measured laryngeal air column width difference (ACWD) showed satisfactory sensitivity and specificity for predicting post-extubation stridor (PES). Because of the limited number of studies available, further investigations are needed to support our findings.
此研究收納了11篇研究 (ICU 10 / OR 1),共計1322次拔管 Post extubation stridor的發生率為4–25% 預測PES的ACWD cut-off values約為0.45 to 1.6 mm. ACWD for PES的sensitivity80%為 specificity 81% The pooled AUC was 0.87 (95% CI = 0.84–0.90). 發生PES的個案的ACWD比沒有發生的來的小 (mean difference = −0.54) 插管天數較長的個案比較容易發生PES (平均差2.75天)
Take Home Message 對加護病房的醫師和呼吸治療師而言, 學會用超音波來評估氣管和ACWD可幫助預測拔管後是否會發生PES。 這部份的應用建議以弧形的腹部探頭為主, 輔以線形探來觀察更細部的影像, 掃描為橫向掃描為主, 探頭放置的位置就介於倒V的Thyroid cartilage和倒U的cricoid cartilage間。