Accuracy of Accuhaler Tester, Ellipta Tester and Turbutester in Patients With Chronic Obstructive Pulmonary Disease

January 29, 2026 updated by: Narongkorn Saiphoklang, MD, Thammasat University

The goal of this observational study is to investigate the accuracy of Accuhaler tester, Ellipta tester and Turbutester in patients with chronic obstructive pulmonary disease (COPD). The main question it aims to answer is:

• Do Accuhaler tester, Ellipta tester, and Turbutester demonstrate comparable accuracy to the In-check DIAL for assessing inspiratory inhalation force in COPD patients?

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This study is a cross-sectional study. COPD patients aged 40 years or older will be included. Peak inspiratory flow rate (PIFR) will be assessed using In-check DIAL as the standard tool. PIFR will be tested in each patient using Accuhaler tester, Ellipta tester and Turbutester.

Study Type

Observational

Enrollment (Actual)

82

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Thailand
    • Changwat Pathum Thani
      • Pathum Thani, Changwat Pathum Thani, Thailand, 12120
        • Narongkorn Saiphoklang

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

COPD patients aged 40 years or older who are confirmed diagnosis by spirometry (post-bronchodilator FEV1/FVC <0.7) and smoking history 10 pack-years or more.

Description

Inclusion Criteria:

  • COPD diagnosis with confirmed by post-bronchodilator forced expiratory volume in 1 second (FEV1)/forced vital capacity (FVC) <0.7
  • Age 40 years or older
  • Smoking history 10 pack-years or more

Exclusion Criteria:

  • COPD exacerbation within 3 months
  • Oral or intravenous corticosteroid treatment within 6 weeks
  • Inability to perform assessment of peak inspiratory flow rate
  • Asthma
  • Tracheostomy, invasive or noninvasive mechanical ventilation

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Accuracy of Accuhaler tester
Time Frame: At day 1 of the study
Percentage
At day 1 of the study
Accuracy of Ellipta tester
Time Frame: At day 1 of the study
Percentage
At day 1 of the study
Accuracy of Turbutester
Time Frame: At day 1 of the study
Percentage
At day 1 of the study

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Prevalence of suboptimal peak inspiratory flow rate
Time Frame: At day 1 of the study
Percentage
At day 1 of the study
Prevalence of insufficient peak inspiratory flow rate
Time Frame: At day 1 of the study
Percentage
At day 1 of the study

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Thammasat University

Investigators

  • Principal Investigator: Narongkorn Saiphoklang, MD, Thammasat University Faculty of Medicine

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 1, 2024

Primary Completion (Actual)

October 31, 2024

Study Completion (Actual)

November 15, 2024

Study Registration Dates

First Submitted

March 29, 2024

First Submitted That Met QC Criteria

March 29, 2024

First Posted (Actual)

April 4, 2024

Study Record Updates

Last Update Posted (Actual)

February 2, 2026

Last Update Submitted That Met QC Criteria

January 29, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • MTU-EC-IM-0-016/67

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

IPD and documents will be available for sharing immediately after publication for a period of 2 years.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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