AIRWAY AREA BY ACOUSTIC REFLECTIONS MEASURED AT THE MOUTH
AIRWAY AREA BY ACOUSTIC REFLECTIONS MEASURED AT THE MOUTH
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DOI：
10.1152/jappl.1980.48.5.749
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发表时间：
1980-01-01
影响因子：
3.3
通讯作者：
DORKIN, HL
中科院分区：
文献类型：
--
作者：
FREDBERG, JJ;WOHL, MEB;DORKIN, HL
为了确定是否能从口腔记录的声学反射数据推断上呼吸道和气管几何结构的特征，对6名[人类]受试者计算了气道横截面积与距离的关系并与从气管正交射线影像投影获得的测量值进行比较。声学数据显示在悬雍垂和下咽处有局部面积最大值，在口咽和声门处有局部最小值。当受试者呼吸空气时，推断的气管面积明显超过射线影像测量值。当受试者呼吸80%氦 - 20%氧时，尽管受试者间差异较大，但声学数据和射线影像数据在受试者内有良好的一致性。所有受试者5次试验中气管面积测定的平均变异系数为0.16。显然，从口腔测量的高频反射数据能够在个体受试者中准确且无创地确定口腔和隆突之间的气道几何结构特征。
To determine if features of upper airway and tracheal geometry can be inferred from acoustic reflection data recorded at the mouth, 6 [human] subjects had inferences of airway cross-sectional area vs. distance computed and compared to measurements obtained from orthogonal radiographic projections of the trachea. The acoustic data show local area maxima at the uvula and hypopharynx and local minima at the oropharynx and the glottis. With subjects breathing air the inferred tracheal areas markedly exceeded the radiographic measurements. With subjects breathing 80% He-20% O2 there was good intrasubject agreement between acoustic and radiographic data in spite of large intersubject variability. The average coefficient of variation of tracheal area determinations for 5 trials in all subjects was 0.16. Apparently features of airway geometry between the mouth and carina can be determined accurately and noninvasively in individual subjects from high frequency reflection data measured at the mouth.