Diaphragmatic Mobility and Chronic Obstructive Pulmonary Disease (DMCOPD)

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. Identifier: NCT00870246
Recruitment Status : Completed
First Posted : March 27, 2009
Last Update Posted : May 6, 2009
Information provided by:
University of Sao Paulo

Brief Summary:
The purpose of this study is to evaluate the influence of diaphragm mobility on exercise capacity and dyspnoea in patients with chronic obstructive pulmonary disease (COPD).

Condition or disease
Chronic Obstructive Pulmonary Disease

Detailed Description:

Chronic Obstructive Pulmonary Disease (COPD) is characterized by progressive obstruction of the airways which is partially irreversible. COPD patients commonly present increased resistance to airflow, air trapping, and pulmonary hyperinflation that alters the chest wall placing the respiratory muscles in mechanical disadvantage, thereby increasing both respiratory drive and the sensation of dyspnoea. Furthermore, to prevent dyspnoea, COPD patients reduce their daily living activities leading to loss of physical condition, social isolation, depression and anxiety,whilst compromising their quality of life.

Forced expiratory volume in one second (FEV1) is the main parameter used to establish the severity of pulmonary impairment and disease progression.

Nevertheless, some studies have suggested that FEV1 does not adequately reflect the clinical manifestations of the disease and is only weakly associated with the severity of dyspnoea, health related quality of life (HRQOL) features, and the ability to perform activities of daily living.

Moreover, FEV1 appears not to be a predictor of mortality in COPD patients. Pulmonary hyperinflation has been related with adaptation in diaphragm muscle maintaining the muscle's capacity to generate power whilst reducing its displacement. The importance of the diaphragm in lung mechanics associated with hyperinflation has been the subject of frequent discussion owing to widespread use of lung volume reducing surgery which results in increased movement range of the diaphragm muscle. However, to date, the relationship between diaphragm mobility and functional capacity in COPD patients remains unknown.

The objective of the present study was to evaluate the influence of diaphragm mobility in the exercise capacity and dyspnoea of patients with COPD.

Study Type : Observational
Actual Enrollment : 50 participants
Official Title: Influence of Diaphragmatic Mobility on the Exercise Capacity and Dyspnoea in Patients With Chronic Obstructive Pulmonary Disease
Study Start Date : February 2008
Actual Primary Completion Date : May 2008
Actual Study Completion Date : November 2008

Resource links provided by the National Library of Medicine

High mobility
Lower mobility

Primary Outcome Measures :
  1. spirometer, capacity of exercise, dyspnea [ Time Frame: 3 months ]

Secondary Outcome Measures :
  1. diaphragm mobility: the craniocaudal excursion of the intrahepatic branches of the portal vein with the B-mode ultrasound [ Time Frame: 1 year ]

Information from the National Library of Medicine

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Ages Eligible for Study:   50 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Sixty patients with moderate or severe COPD were evaluated.

Inclusion Criteria:

  • patients with chronic obstructive pulmonary disease clinically stable (no respiratory crises or hospitalizations within the 30 days preceding the study outset)
  • patients receiving optimized clinical medical treatment

Exclusion Criteria:

  • patients suffering from other cardiorespiratory diseases
  • patients with oxygen-dependent for any reason
  • patients classified as obese or as underweight
  • patients presenting other respiratory diseases or pleural scars on chest X-rays

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 identifier (NCT number): NCT00870246

Sponsors and Collaborators
University of Sao Paulo
Principal Investigator: Celso Carvalho, professor Sao Paulo University

Responsible Party: Celso Ricardo Fernandes de Carvalho, University of Sao Paulo Identifier: NCT00870246     History of Changes
Other Study ID Numbers: 914/04
First Posted: March 27, 2009    Key Record Dates
Last Update Posted: May 6, 2009
Last Verified: May 2009

Keywords provided by University of Sao Paulo:
pulmonary emphysema

Additional relevant MeSH terms:
Lung Diseases
Lung Diseases, Obstructive
Pulmonary Disease, Chronic Obstructive
Respiratory Tract Diseases