Diaphragmatic Mobility and Chronic Obstructive Pulmonary Disease

Chronic Obstructive Pulmonary Disease Clinical Trial

— DMCOPD  

Official title:

Influence of Diaphragmatic Mobility on the Exercise Capacity and Dyspnoea in Patients With Chronic Obstructive Pulmonary Disease

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00870246
• Other study ID #: 914/04
• Status: Completed
• Phase: N/A
• First received: March 26, 2009
• Last updated: May 5, 2009
• Start date: February 2008
• Est. completion date: November 2008

Study information

• Verified date: May 2009
• Source: University of Sao Paulo
• Contact: n/a
• Is FDA regulated: No
• Health authority: Brazil: Ethics Committee
• Study type: Observational

Clinical Trial 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).

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 50
• Est. completion date: November 2008
• Est. primary completion date: May 2008
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 50 Years to 75 Years

Eligibility

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

Study Design

N/A

Related Conditions & MeSH terms

• Chronic Obstructive Pulmonary Disease
• Lung Diseases
• Lung Diseases, Obstructive
• Pulmonary Disease, Chronic Obstructive

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
University of Sao Paulo

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	spirometer, capacity of exercise, dyspnea		3 months	Yes
Secondary	diaphragm mobility: the craniocaudal excursion of the intrahepatic branches of the portal vein with the B-mode ultrasound		1 year	Yes