Design and Verification of a COPD Screening Equipment Based on Dual-differential Pressure Throttling Technique.
10.3969/j.issn.1671-7104.2019.04.008
- Author:
Mu WANG
1
;
Zijun HE
1
;
Wei FANG
1
;
Yanyan CHEN
1
Author Information
1. Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031.
- Publication Type:Journal Article
- Keywords:
COPD;
FEV1;
FVC;
dual-differential pressure throttling technique
- MeSH:
Forced Expiratory Volume;
Humans;
Pulmonary Disease, Chronic Obstructive;
diagnosis;
Reproducibility of Results;
Respiratory Function Tests;
economics;
instrumentation;
Tidal Volume;
Vital Capacity
- From:
Chinese Journal of Medical Instrumentation
2019;43(4):263-265
- CountryChina
- Language:Chinese
-
Abstract:
This study was to design a chronic obstructive pulmonary disease (COPD) screening equipment, based on the dual-differential pressure throttling technique. The technique combined a wide range, but low-resolution ratio sensor and a narrow range, but high-resolution ratio one. It can accurately detect the indexes of forced vital capacity (FVC), forced expiratory volume in one second (FEV), one second rate(FEV/FVC (%)), and achieve them in a low-cost way. The new designed machine will be compared with a British machine, named ML-3500. The correlations of FVC and FEV between new machine and ML-3500 were 0.998 and 0.999, respectively. The P values of paired test of these two indexes were over 0.05. Bland-Altman analysis of FVC, FEV and FEV/FVC (%) showed that more than 90% of the scatter points of the three parameters fell within the consistency interval. This machine can be used to accurately screen COPD and its low-cost would be advantage to promote in large population.
