An interventional study of Spirometer in Chronic Obstructive Pulmonary Disease (COPD) and Spirometry, sponsored by Fu Jen Catholic University. Recruiting at 1 site in Taiwan. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2026-07-02.
Sponsored by Fu Jen Catholic University · Not applicable, Interventional, and Diagnostic
This study compares a handheld ultrasonic spirometer with a standard hospital spirometer in adults with chronic respiratory diseases. Each participant will complete lung function tests using both devices. The study aims to determine whether the ultrasonic device provides accurate and reliable measurements for use in clinical or home settings.
This study aims to compare a new ultrasonic handheld spirometer with the standard hospital spirometer used in lung function testing. We want to find out whether the ultrasonic device can measure breathing strength and lung capacity as accurately and reliably as the traditional machine.
Adults with chronic respiratory diseases-including COPD, asthma, bronchiectasis, and interstitial lung disease-will participate. Each participant will perform lung function tests using both devices in a randomized order. The results from the two methods will then be compared to see how closely they match.
The goal of this study is to determine whether the ultrasonic spirometer can be used as a convenient alternative tool for lung function monitoring in clinics, community settings, or at home.
4,131 studies on the registry are indexed under Pulmonary Disease, Chronic Obstructive; 697 are open to participants now.
This study's planned enrollment of 100 is above the median of 70 across 2,926 interventional studies indexed under Pulmonary Disease, Chronic Obstructive.
Browse Pulmonary Disease, Chronic Obstructive studies →Fu Jen Catholic University is the lead sponsor of 43 studies on the registry; 22 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Standard hospital spirometry performed according to ATS/ERS procedures to obtain FEV1, FVC, and PEF. In this study, spirometry is performed using the Conventional Spirometer first, followed by the Ultrasonic Spirometer.
Diagnostic Test: Spirometer
Standard hospital spirometry performed according to ATS/ERS procedures to obtain FEV1, FVC, and PEF. In this study, spirometry is performed using the Ultrasonic Spirometer first, followed by the Conventional Spirometer.
Diagnostic Test: Spirometer
The handheld ultrasonic spirometry device uses acoustic flow analysis to measure FEV1, FVC, and PEF and is evaluated for accuracy compared with the conventional spirometer. Participants may perform this test either before or after the conventional spirometry test, depending on the randomized crossover sequence.
Agreement of FEV1 between Ultrasonic and Conventional Spirometers
Agreement of forced expiratory volume in one second (FEV1) measured by the ultrasonic spirometer compared with the conventional spirometer, assessed using Bland-Altman analysis and correlation coefficients.
Time frame: one day
Test-Retest Reliability of Ultrasonic Spirometer (Reproducibility)
Assessment of within-device repeatability of the ultrasonic spirometer across three forced expiratory maneuvers, evaluated by intraclass correlation coefficients (ICC) and coefficient of variation.
Time frame: one day
Plan to share: No
No publications or documents are linked to this record.
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Pulmonary Disease, Chronic Obstructive→
Fu Jen Catholic University