Working…
COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC: https://www.coronavirus.gov.

Get the latest research information from NIH: https://www.nih.gov/coronavirus.
ClinicalTrials.gov
ClinicalTrials.gov Menu

The Respiratory Physiology Variation of COPD Patients in Inspiratory Muscle Training

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT02278523
Recruitment Status : Completed
First Posted : October 30, 2014
Last Update Posted : October 30, 2014
Sponsor:
Information provided by (Responsible Party):
Weiliang Wu, Guangzhou Institute of Respiratory Disease

Brief Summary:

Background:Respiratory muscle weakness is observed in chronic obstructive pulmonary disease(COPD) patients and contributes to hypercapnia, dyspnoea, nocturnal oxygen desaturation and reduced walking distance.During exercise it has been shown that diaphragm work is increased in COPD and COPD patients use a larger proportion of the maximal inspiratory pressure (MIP) than healthy subjects. This pattern of breathing is closely related to the dyspnoea sensation during exercise and might potentially induce respiratory muscle fatigue. Inspiratory muscle training(IMT) increases inspiratory muscle strength and endurance, and decreases dyspnoea.But the mechanism of IMT still lack of research.

Purpose:The experiment is aim to compare of the similarities and differences of transdiaphragmatic pressure by detecting the transdiaphragmatic pressure of COPD patients and healthy volunteers in different intensity of threshold load conditions. Thus investigate how inspiratory muscle training works or mechanism in lung rehabilitation programmes of COPD.And emerging the theoretical basis of inspiratory muscle training from respiratory physiological mechanism.


Condition or disease Intervention/treatment Phase
Chronic Obstructive Pulmonary Disease Device: Threshold IMT® Phase 2 Phase 3

Detailed Description:

Subjects:

COPD group ( experimental group ) Ten subjects with moderate COPD were will be recruited from the investigators outpatient clinic for the study. According to the criteria of the American Thoracic Society (ATS), COPD is defined as postbronchodilator forced expiratory volume in 1 second (FEV1) of 30% to 79% of the predicted value and a ratio of FEV1 to forced vital capacity (FVC) ,70%.

Inclusion criteria:(1)Severe and very severe COPD (postbronchodilator FEV1/FVC under 70% and FEV1 under 50% of the predicted value;(2)Inspiratory muscle weakness(Maximal Inspiratory Pressure under 60cmH2O(centimeter water column).(3) bronchial dilation test(BDT) negative.(4) Exclusion of other cardiopulmonary diseases.

Exclusion criterion:(1)Suffer from acute exacerbation less than 4 weeks.(2) Intravenous or oral corticosteroids in 4 weeks.(3) With other heart, lung and brain disorders.(4) With poor compliance.

Healthy volunteers group (control group ) Inclusion criteria:(1) Normal lung function(FEV1/FVC above 70% and FEV1 above 50% of the predicted value); (2)Without inspiratory muscle weakness(Maximal Inspiratory Pressure above 60cmH2O)(3) without nervous system and respiratory diseases.

Experimental methods : prospective randomized controlled trial(RCT)

  1. record the information of the subjects: sexuality, age ( years ), height ( cm), weight ( kg ), BMI ;
  2. Pulmonary function tests:forced expiratory volume in 1 second(FEV1), FEV1 of the predicted value (FEV1/Pred%), forced vital capacity (FVC), FVC of the predicted value (FVC/Pred%), a ratio of FEV1 to forced vital capacity (FEV1/FVC%).
  3. Synchronous record:mouth pressure ( Pm ), esophageal pressure ( Peso ), intragastric pressure ( Pgas ),transdiaphragmatic pressure ( Pdi ), flow ( flow ), tidal volume ( volume ), Five lead diaphragmatic electromyography of the esophagus ( electromyography diaphragm (EMGdi1, EMGdi2, EMGdi3, EMGdi4, EMGdi5 )).
  4. Measure the maximal inspiratory pressure, records of maximum transdiaphragmatic pressure and maximum diaphragmatic electromyography simultaneously.

Subjects suffer from different level of threshold load generated by threshold loading device. Detecting the pressure and electrical while adjust the load to 30%,40%,50%,60%,70%,80% of the MIP respectively. The change from baseline in transdiaphragmatic pressure will be detect in each level of load.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 12 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: The Respiratory Physiology Variation of COPD Patients in Inspiratory Muscle Training
Study Start Date : June 2014
Actual Primary Completion Date : October 2014
Actual Study Completion Date : October 2014

Arm Intervention/treatment
Experimental: Inspiratory muscle training group
COPD patient use Inspiratory muscle trainer (Threshold IMT®)
Device: Threshold IMT®
A device used to offer threshold load to inspiratory muscle
Other Name: threshold inspiratory muscle trainer

Active Comparator: control group
normal volunteers use Inspiratory muscle trainer(Threshold IMT®)
Device: Threshold IMT®
A device used to offer threshold load to inspiratory muscle
Other Name: threshold inspiratory muscle trainer




Primary Outcome Measures :
  1. Transdiaphragmatic pressure [ Time Frame: half an hour ]
    measure the transdiaphragmatic pressure while spontaneous breathing



Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Layout table for eligibility information
Ages Eligible for Study:   20 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Severe and very severe COPD (postbronchodilator FEV1/FVC under 70% and FEV1 under 50% of the predicted value
  • Inspiratory muscle weakness(Maximal Inspiratory Pressure under 60cmH2O.
  • Bronchial dilation test(BDT) negative.
  • Exclusion of other cardiopulmonary diseases.

Exclusion Criteria:

  • Suffer from acute exacerbation less than 4 weeks.
  • Intravenous or oral corticosteroids in 4 weeks.
  • With other heart, lung and brain disorders.
  • With poor compliance.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02278523


Locations
Layout table for location information
China, Guangdong
Respiratory muscle training device
Guangzhou, Guangdong, China, 510000
Sponsors and Collaborators
Guangzhou Institute of Respiratory Disease
Investigators
Layout table for investigator information
Study Chair: Chen Rongchang, Master Guangzhou Institude of Respiratory Disease

Layout table for additonal information
Responsible Party: Weiliang Wu, Guangzhou Institute of Respiratory Disease
ClinicalTrials.gov Identifier: NCT02278523    
Other Study ID Numbers: GuangzhouIRD
GuangzhouIRD ( Other Identifier: GuangzhouIRD )
First Posted: October 30, 2014    Key Record Dates
Last Update Posted: October 30, 2014
Last Verified: October 2014
Additional relevant MeSH terms:
Layout table for MeSH terms
Lung Diseases, Obstructive
Pulmonary Disease, Chronic Obstructive
Lung Diseases
Respiratory Tract Diseases