用NI sbRIO研制便携式数字肺活量计

S. Ibrahim, A. Jusoh, N. A. Malik, S. Mazalan
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引用次数: 4

摘要

肺活量测定是诊断各种呼吸系统疾病的有效方法之一。好的肺活量计带有优秀的图形用户界面。肺活量计用于测量肺参数,如FVC(用力肺活量)和FEV1(第一秒用力呼气量)。本课题的目的是利用NI sbRIO FPGA板和LabVIEW软件开发便携式肺活量计。LabVIEW程序由两部分组成:1)数据采集和2)疾病诊断。数据采集部分将从用户那里获取呼吸空气的数据。同时,疾病诊断部分将利用获得的数据对疾病进行分析。该系统使用国家仪器单板Rio 9636 (NI sbRIO)进行数字数据转换和数据采集,并使用呼吸硬件,用户将使用该硬件向肺活量计输送空气。呼吸硬件使用文丘里的原理,其中两种压力的差异与不同的管径用于测量流量和呼出的空气量在一段时间内;以确定呼吸状况。本文还介绍了三名不同健康表现的志愿者的结果。健康志愿者FEV1比值为81.1%,哮喘志愿者为72.04%,疑似支气管炎志愿者为33.4%。基于这些结果,与健康用户相比,不健康用户的FEV1值更小,曲线下面积更小。试验结果用肺功能参数表示,包括容积-时间图和流量-容积图。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development of portable digital spirometer using NI sbRIO
One of the effective ways to diagnose various respiratory diseases is using spirometry test. Good spirometer comes with excellent graphical user interface. Spirometer is used to measure lung parameters such as FVC (Forced Vital Capacity) and FEV1 (Forced Expiratory Volume in the first second). The aim of this project is to develop a portable spirometer using NI sbRIO FPGA board and LabVIEW Software. The LabVIEW program consists of two parts: 1) the data acquisition and 2) the disease diagnosis. The data acquisition part will obtain data from user in terms of breathed air. Meanwhile, the disease diagnosis part will use the obtained data to analyze the disease. The system uses National Instrument Single Board Rio 9636 (NI sbRIO) for digital data conversion and data acquisition and breathing hardware from which users will used to flow air into the spirometer. The breathing hardware uses Venturi's principle where the difference of the two pressures with different tube diameters used to measure flow rate and volume of air exhaled over a period of time; to determine the respiratory conditions. Results obtained from three different volunteers with different health performances are also presented in this paper. The FEV1 ratio of a healthy volunteer is 81.1%, an asthma volunteer is 72.04%, while a volunteer with suspected bronchitis is 33.4%. Based on these results, unhealthy users tend to have smaller value of FEV1 with lower area under the curve when compared to a healthy user. The test results are represented in parameters of pulmonary functions which include Volume-time and Flow-volume graphs.
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