Ochroch E Andrew, Eckmann David M
Department of Anesthesiology, University of Pennsylvania Health System, 416C Ravdin Court, 3400 Spruce Street, Philadelphia, PA 19104, USA.
Anesth Analg. 2002 Sep;95(3):645-9, table of contents. doi: 10.1097/00000539-200209000-00028.
Acoustic reflectometry, a noninvasive test that produces a length versus cross-sectional area map of the airway, has been used to identify difficult-to-tracheally intubate patients in a small retrospective case-control study. A critical airway volume of 40.2 mL separated those patients whose tracheas were impossible to intubate from those who were easily intubated. To determine if this technology was applicable for prospectively predicting difficult intubation and difficult ventilation in routine clinical practice, we performed a double-blinded, prospective cohort study. Our a priori hypothesis was that small airway volumes in adults (<40.2 mL) would predict absolute inability to intubate. We conclude that by use of acoustic reflectometry, there was no relationship between inability to intubate, poor glottic visualization, and multiple laryngoscopies with airway volume.
Acoustic reflectometry, a noninvasive test that uses sound to produce a length versus cross-sectional area map of the airway, was not able to predict inability to intubate, poor glottic visualization, and multiple laryngoscopies.
声学反射测量法是一种无创检测方法，可生成气道长度与横截面积的映射图，在一项小型回顾性病例对照研究中已被用于识别气管插管困难的患者。40.2毫升的临界气道容积可区分气管无法插管的患者和易于插管的患者。为确定该技术是否适用于在常规临床实践中前瞻性预测插管困难和通气困难，我们进行了一项双盲前瞻性队列研究。我们的先验假设是成人气道容积小（<40.2毫升）会预示绝对无法插管。我们得出结论，通过使用声学反射测量法，无法插管、声门视野不佳以及多次喉镜检查与气道容积之间没有关系。
声学反射测量法是一种利用声音生成气道长度与横截面积映射图的无创检测方法，无法预测无法插管、声门视野不佳以及多次喉镜检查。
