Effects of Pursed-lip Breathing on Exercise Tolerance and Dynamic Hyperinflation in COPD

July 30, 2010 updated by: Universidade Federal do Rio de Janeiro

Effects of Pursed-lip Breathing on Exercise Tolerance and Dynamic Hyperinflation in Chronic Obstructive Pulmonary Disease

Pursed-lip breathing (PLB) has been advocated to reduce respiratory rate and improve oxygen saturation in patients with chronic obstructive pulmonary disease (COPD) at rest. Although PLB is a strategy that potentially reduces expiratory flow limitation, there are only few studies addressing its effects on exercise.

This study aimed to assess the ability of PLB to change the breathing pattern, degree of dynamic hyperinflation (DH) and arterial oxygenation in COPD patients during exercise. Exercise tolerance was evaluated by endurance time and respiratory mechanics was evaluated by forced oscillation technique.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

40

Phase

  • Not Applicable

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

  • Brazil
      • Rio de Janeiro, Brazil
        • Clementino Fraga Filho University Hospital

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

36 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Clinical diagnosis of chronic obstructive pulmonary disease (COPD)
  • Regular treatment at Clementino Fraga Filho University Hospital (UFRJ)

Exclusion Criteria:

  • Exacerbation in the preceding 4 weeks
  • SpO2<85% at peak exercise
  • Other diseases that may contribute to dyspnea and exercise intolerance

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

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Pursed-lip Breathing
Behavioral: Pursed-lip breathing
Pursed-lip breathing involves a nasal inspiration followed by expiratory blowing against partially closed lips, avoiding forceful exhalation.
Behavioral: Normal Breathing

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Endurance time
Time Frame: within the first 01 hour
within the first 01 hour

Secondary Outcome Measures

Outcome Measure
Time Frame
inspiratory capacity
Time Frame: within the first 01 hour
within the first 01 hour
oxygen saturation
Time Frame: within the first 01 hour
within the first 01 hour
dyspnea
Time Frame: within the first 01 hour
within the first 01 hour
forced oscillation variables
Time Frame: within the first 01 hour
within the first 01 hour

Collaborators and Investigators

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

Sponsor

Universidade Federal do Rio de Janeiro

Investigators

  • Study Director: Fernando S Guimarães, PhD, Universidade Federal do Rio de Janeiro

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

March 1, 2007

Primary Completion (Actual)

October 1, 2009

Study Completion (Actual)

October 1, 2009

Study Registration Dates

First Submitted

July 19, 2010

First Submitted That Met QC Criteria

July 30, 2010

First Posted (Estimate)

August 2, 2010

Study Record Updates

Last Update Posted (Estimate)

August 2, 2010

Last Update Submitted That Met QC Criteria

July 30, 2010

Last Verified

August 1, 2008

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CEP/HUCFF/UFRJ 187/07

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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