Manjunatha Roopa G, Prakash Surya, Rajanna Konandur
1Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, 560012 India.
2Department of Ear, Nose and Throat, M. S. Ramaiah Medical College and Hospital, Bangalore, 560054 India.
Indian J Otolaryngol Head Neck Surg. 2019 Nov;71(Suppl 3):1935-1939. doi: 10.1007/s12070-018-1349-9. Epub 2018 Apr 16.
A new nasal sensor has been designed using Polyvinylidene fluoride (PVDF) film using its piezoelectric property to measure nasal patency. The aim of this study is to determine the intra- and intersession reliability of the new PVDF nasal sensor measurement of unilateral and combined nasal parameters in a group of healthy subjects. Two identical nasal sensors: for right nostril (RN) and left nostril (LN) were designed using piezoelectric natured PVDF films. Twenty subjects were studied. To evaluate the repeatability, total three sets of PVDF sensor measurements were recorded, two sets were taken 5 min apart during same session without repositioning the PVDF nasal sensors and two more sets were taken during 1 h apart successively, by repositioning the PVDF nasal sensor. Intraclass correlation coefficients (ICC) of PVDF sensor measurements for intra- and intersession showed a high and greater repeatability over time for all the combined (mean) and unilateral (RN and LN) values. In both healthy and patients, ICC values for both intra- and intersession measurements were ≥ 0.80 confirming strong reliability and also almost all of the coefficients of variation for the same parameters were low (below 10%). PVDF sensor measurements showed good intra- and intersession repeatability and can be recommended for the objective monitoring of nasal patency during diagnosis and follow-up of conditions.
一种新型鼻传感器利用聚偏二氟乙烯（PVDF）薄膜的压电特性进行设计，用于测量鼻通气度。本研究的目的是确定在一组健康受试者中，新型PVDF鼻传感器测量单侧和联合鼻参数的组内和组间可靠性。使用具有压电特性的PVDF薄膜设计了两个相同的鼻传感器：一个用于右鼻孔（RN），一个用于左鼻孔（LN）。对20名受试者进行了研究。为了评估重复性，总共记录了三组PVDF传感器测量值，其中两组在同一会话期间间隔5分钟采集，不重新放置PVDF鼻传感器，另外两组在1小时内依次间隔采集，重新放置PVDF鼻传感器。PVDF传感器测量值的组内和组间类内相关系数（ICC）显示，所有联合（平均）和单侧（RN和LN）值随时间具有高且更大的重复性。在健康受试者和患者中，组内和组间测量的ICC值均≥0.80，证实了强可靠性，并且几乎所有相同参数的变异系数都很低（低于10%）。PVDF传感器测量显示出良好的组内和组间重复性，可推荐用于疾病诊断和随访期间鼻通气度的客观监测。
