Methodology for detecting swallowing sounds
Methodology for detecting swallowing sounds
复制标题
检测吞咽声音的方法
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
K. Michi
中科院分区：
文献类型：
--
作者：
Koji Takahashi;M. Groher;K. Michi
使用颈部听诊评估咽部吞咽可能成为吞咽困难患者临床评估的一部分。虽然它的使用是基于主观评价，吞咽声音的声学分析可能会建立更客观的标准，在吞咽障碍的检测。本研究旨在调查三个方面的方法，用于检测吞咽声音：（1）类型的声学检测器单元适合于咽部吞咽的声学分析，（2）类型的粘合剂适合于附着的检测器，和（3）的最佳位置的声音检测咽部吞咽。由于双面纸带加速度计的频率响应范围宽，衰减水平小，因此被选为合适的检测器单元。使用这个探测器单元，吞咽的声音和噪声与模拟喉抬高和颈动脉脉搏，在24个站点上的颈部在14个正常人采集这些信号进行声学分析。检测吞咽音的最佳部位的确定是基于信噪比。位于环状软骨下方的气管外侧边缘上方的部位是检测吞咽声的最佳部位，因为该部位显示出最大的信噪比和最小的方差。环状软骨中心上方的部位以及环状软骨中心上方的部位与颈静脉切迹上级部位之间的中点也被认为是最合适的部位。
The use of cervical auscultation in the evaluation of the pharyngeal swallow may become a part of the clinical evaluation of dysphagic patients. Though its use is based on subjective evaluation, an acoustic analysis of swallowing sounds might establish more objective criteria in the detection of swallowing disorders. The present study sought to investigate three aspects of the methodology for detecting swallowing sounds: (1) the type of acoustic detector unit suited to an acoustic analysis of the pharyngeal swallow, (2) the type of adhesive suited for the attachement of the detector, and (3) the optimal site for sound detection of the pharyngeal swallow. An accelerometer with double-sided paper tape was selected as the appropriate detector unit because of its wide range of frequency response and small attenuation level. Using this detector unit, swallowing sounds and noise associated with simulated laryngeal elevation and the carotid pulse were acquired at 24 sites on the neck in 14 normal subjects; these signals were acoustically analyzed. The determination of the optimal site for detecting swallowing sounds was based on the signal-to-noise ratio. The site over the lateral border of the trachea immediately inferior to the cricoid cartilage is the optimal site for detection of swallowing sounds because this site showed the greatest signal-to-noise ratio with the smallest variance. The site over the center of the cricoid cartilage and the midpoint between the site over the center of the cricoid cartilage and the site immediately superior to the jugular notch were also considered to be the most appropriate sites.