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.
Study summary
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.
Eligibility
Sex
ALL
Min age
18 Years
Max age
80 Years
Healthy volunteers
No
Inclusion Criteria:
* Adults aged 18 to 80 years.
* Diagnosed with a chronic respiratory disease (e.g., COPD, asthma, bronchiectasis, or interstitial lung disease).
* Willing to follow the instructions for using the ultrasonic spirometer.
* Clinically stable and able to understand the study purpose and procedures, and who provide informed consent.
Exclusion Criteria:
* Individuals who, after explanation, are still unable to properly perform the ultrasonic spirometry procedure.
* Individuals who, after explanation, refuse to participate in the study.
* Patients with unstable vital signs.
* Pregnant or suspected pregnant women.
Primary outcome measure(s)
Agreement of FEV1 between Ultrasonic and Conventional Spirometers — one day 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.
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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