RecruitingNot ApplicableNCT06425562

The Potential Added Value of Impulse Oscillometry in Asthma Monitoring

Sponsor

Universitair Ziekenhuis Brussel

Enrollment

50 participants

Start Date

Sep 1, 2024

Study Type

INTERVENTIONAL

Conditions

Asthma

Summary

The goal of this longitudinal observational study is to learn if impulse oscillometry (IOS) has an added value in asthma monitoring in adult asthma patients who are prescribed a change in asthma maintenance therapy. The main questions it aims to answer are: * Is there a difference in the change in IOS parameters and FEV1 respectively, stratified according to change in asthma control test? * Is there a difference in the change in IOS parameters and FEV1 respectively, stratified according to change in other questionnaire such as the asthma control questionnaire and the asthma quality of life questionnaire. * Are the proposed minimal clinically important differences (MCIDs) valid for short follow-up periods (3 - 6 months)? Participants will undergo lung function testing (full lung function, multiple breath nitrogen washout, impulse oscillometry) and questionnaires (asthma control test, asthma control questionnaire, asthma quality of life questionnaire), once during the baseline visit and once during the follow-up visit three to six months later.

Eligibility

Min Age: 18 Years

Inclusion Criteria1

Adult asthma patients with a scheduled consultation at the outpatient hospital to whom a step-up or step-down of their pharmacological asthma treatment is prescribed

Exclusion Criteria1

Unstable asthma (defined as need for oral corticosteroids or (respiratory) antibiotic course in the 4 weeks before inclusion or any major medical issue in the 4 weeks before inclusion)

Interventions

OTHERFull lung function

This includes spirometry, body plethysmography and single breath gas transfer test. These are all non-invasive physiological measurements / lung function tests. Measures flow volumes, lung volumes and gas transfer respectively.

OTHERMultiple breath nitrogen washout

Non-invasive physiological measurement / lung function test. 100% oxygen is inhaled and the nitrogen concentration in the lungs is measured. This test gives information on the ventilation distribution in the lungs.

OTHERImpulse oscillometry

Non-invasive physiological measurement / lung function test. This technique superimposes sound waves on tidal breathing. The patient can breathe normally trough the device, no forced respiratory maneuvers are required. It gives information on the reactance and resistance of the lung.