Method for calibrating respiratory reactance based on the forced oscillation pulmonary function test
LIU Bingxin
WANG Mengyuan
LIN Junjie
LIU Zhipeng
YIN Tao
ZHANG Shunqi
Abstract：Forced oscillation technique(FOT)is a critical tool in pulmonary function testing.Aiming at the lack of a unified standard for electrical reactance in existing FOT equipment,which leads to significant differences in the electrical reactance results of different instruments,we proposed an easily reproducible design method for reactance standards that covers the human physiological range selected commercial FOT devices(e.g.,Canadian Thorasys tremoflo® C2,German Jaeger IOS)to test these standards and recor-ded absolute errors for each instrument.Furthermore,5 healthy subjects were recruited for validation tests.The results showed that cali-bration based on theoretical values significantly reduced the individual differences among the instruments for the same subjects,with an average reduction of 51.4%in standard deviation during the test.This method can lay a foundation for cross-device data interoperability and clinical standardization.
Keywords：Respiratory reactanceCalibration methodForced oscillation techniquePulmonary function testFourier transformReactance standards
Publication Date：2026-06-30
Online Publishing Date：2026-09-11(First online date of this platform, not the publication date of the document)
Pages：6( 221-226 )