Guyette T W, Carpenter M A
Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL.
J Speech Hear Res. 1988 Dec;31(4):537-48. doi: 10.1044/jshr.3104.537.
This study examined the accuracy of pressure-flow estimates of velopharyngeal (V-P) orifice size as applied to an analog model and two human subjects. Accuracy was assessed under differing conditions of degree of nasal resistance and type of instrumental interface. Known V-P orifice openings were introduced in the model through use of cover plates and in the humans through use of modified nasopharyngeal obturators. Nasal resistances were altered with perforated nasal plugs. Instrumental interfaces differed principally in the method used to detect nasal cavity pressure. Measures were applied to the hydrokinetic equation to estimate V-P area values. Data from the analog model and the human subjects were comparable in many respects. In low nasal resistance, area estimates were reasonably accurate regardless of the interface utilized. In high nasal resistance error typically increased, although not equally across interface types. Potential sources of error are identified and discussed.
本研究检测了应用于模拟模型和两名人类受试者的腭咽（V-P）孔口大小压力-流量估计值的准确性。在不同鼻阻力程度和仪器接口类型的条件下评估准确性。通过使用盖板在模型中引入已知的V-P孔口开口，通过使用改良的鼻咽阻塞器在人体中引入。使用穿孔鼻塞改变鼻阻力。仪器接口的主要区别在于检测鼻腔压力的方法。将测量值应用于流体动力学方程以估计V-P面积值。模拟模型和人类受试者的数据在许多方面具有可比性。在低鼻阻力情况下，无论使用何种接口，面积估计都相当准确。在高鼻阻力情况下，误差通常会增加，尽管不同接口类型增加的程度不同。识别并讨论了潜在的误差来源。
