Comparing Pressure Based and Dilution Based Total Lung Capacity Measurements in COPD Patients for Lung Function Diagnostics

NCT ID: NCT04531293

Last Updated: 2022-06-06

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

128 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-12-31

Study Completion Date

2022-04-11

Brief Summary

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Total Lung Capacity (TLC) of the lungs can be determined using a pressure based method (i.e. by body plethysmography) or it can be determined using a dilution based method (i.e. by single breath dilution during a CO diffusing capacity test). The results of the two methods differ, especially in patients with higher grades of COPD. The study investigates an improved analysis for the determination of TLC using the dilution method; this method has been suggested in the new ATS/ERS DLCO (diffusion capacity of lung for carbon monoxide) standard published in 2017. This study is based on approx. 120 participants. So far, there has not been a study using commercially available equipment.

Spirometry, lung volume measurement by body plethysmography and DLCO measurements will be performed on reference device (Masterscreen Body/Diff, Vyaire, USA), Spirometry and DLCO will also be performed on the device under test (EasyOne Pro LAB, ndd Medizintechnik AG, Switzerland) in a crossover design. Both devices are CE marked and FDA approved. The tests performed on both devices are standardized tests performed routinely with patients.

Detailed Description

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Conditions

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COPD

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

OTHER

Blinding Strategy

NONE

Study Groups

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Total-breath method followed by standard method

Total Lung Capacity (TLC) measurement performed on device EasyOne Pro (TM) according to total-breath method followed by TLC measurement performed on device MasterScreen (TM) according to standard method.

Group Type OTHER

Respiratory Analysis System

Intervention Type DEVICE

Measurement of total lung capacity using total-breath method

Respiratory Analysis System

Intervention Type DEVICE

Measurement of total lung capacity using standard method

Standard method followed by total breath method

Total Lung Capacity (TLC) measurement performed on device Masterscreen (TM) according to standard method followed by TLC measurement performed on device EasyOne Pro (TM) according to total-breath method.

Group Type OTHER

Respiratory Analysis System

Intervention Type DEVICE

Measurement of total lung capacity using total-breath method

Respiratory Analysis System

Intervention Type DEVICE

Measurement of total lung capacity using standard method

Interventions

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Respiratory Analysis System

Measurement of total lung capacity using total-breath method

Intervention Type DEVICE

Respiratory Analysis System

Measurement of total lung capacity using standard method

Intervention Type DEVICE

Other Intervention Names

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EasyOne Pro (TM) by ndd Medizintechnik AG Masterscreen (TM) by Vyaire

Eligibility Criteria

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Inclusion Criteria

3 groups

* Healthy subjects, FEV1/FEV1(pred) \> 80%
* COPD GOLD classification 1 or 2, FEV1/FEV1(pred) ≥ 50%
* COPD GOLD classification 3 or 4, FEV1/FEV1(pred) \< 50%

Exclusion Criteria

* Smoked during 2 hours prior to measurements


* BMI \> 30
* Any relevant concomitant diseases (investigators decision)
* Any relevant concomitant medication (investigators decision)
* FEV1/FEV1(pred) \<= 80%
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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ndd Medizintechnik AG

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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LungenZentrum Hirslanden

Zurich, , Switzerland

Site Status

Countries

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Switzerland

References

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Jorres RA, Buess C, Piecyk A, Thompson B, Stanojevic S, Magnussen H. The total-breath method yields higher values of DLCO and TLC than the conventional method. BMC Pulm Med. 2024 Mar 13;24(1):127. doi: 10.1186/s12890-024-02932-y.

Reference Type DERIVED
PMID: 38475751 (View on PubMed)

Other Identifiers

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EOP17

Identifier Type: -

Identifier Source: org_study_id

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