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High Frequency Chest Wall Oscillation in Chronic Obstructive Pulmonary Disease (COPD)

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: NCT00863616
Recruitment Status : Completed
First Posted : March 18, 2009
Last Update Posted : March 18, 2009
Electromed, Inc.
Information provided by:
East and North Hertfordshire NHS Trust

Brief Summary:

Patients with Chronic obstructive pulmonary disease (COPD) tend to have cough, excess mucus production and breathlessness as cardinal features. The excess mucus production often leads to frequent infections, exacerbations and poor quality of life. Mucociliary clearance may have an impact on improving symptoms, exercise tolerance, quality of life and reduce exacerbations.

High frequency chest wall oscillation(HFCWO) devices use percussion to the chest wall delivered from a pump through a close fitting inflatable vest. This technique has been shown to enhance mucus clearance in patients with cystic fibrosis and Bronchiectasis. This pilot study was designed to explore the feasibility, tolerance and effectiveness of the HFCWO in patients with advanced COPD.

Condition or disease Intervention/treatment Phase
Chronic Obstructive Pulmonary Disease Device: HFCWO - SmartVest Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 32 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Self-Administered High Frequency Chest Wall Oscillation Technique for Mucus Clearance in COPD: An Exploratory Pilot Project Using the SMARTVEST Device
Study Start Date : August 2006
Actual Primary Completion Date : October 2007
Actual Study Completion Date : October 2007

Resource links provided by the National Library of Medicine

MedlinePlus related topics: COPD Lung Diseases

Arm Intervention/treatment
Experimental: HFCWO
HFCWO twice a day delivered by SmartVest device at 13Hz FOR 20min x2. Duration 4 weeks in each phase with a 2week washout.
Device: HFCWO - SmartVest
SmartVest with vest administered for 20min at 11-13Hz
Other Name: SmartVest

No Intervention: Placebo/Control
Self-administered breathing exercises

Primary Outcome Measures :
  1. Health related quality of life (St George's Respiratory Questionnaire) [ Time Frame: 3 months ]

Secondary Outcome Measures :
  1. Exercise tolerance (Endurance Shuttle Walk Time achieved) [ Time Frame: 3 months ]

Information from the National Library of Medicine

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Ages Eligible for Study:   40 Years to 85 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. COPD; patients defined by a history of cough, breathlessness and/ mucus/sputum production with lung function showing FEV1/FVC <70% and FEV1<80% predicted and < 20% reversibility from baseline on administration of nebulised b2-agonist (Salbutamol 5mg)
  2. Age 40-85 years
  3. Mucus hypersecretion ( > 25 ml/72 h collection)

Exclusion Criteria:

  1. Chest wall deformity (i.e., kyphoscoliosis, Rib fractures)
  2. Severe osteoporosis
  3. Haemoptysis within the last 3 months
  4. Thoracic or abdominal surgery within 3 months
  5. Respiratory failure on non-invasive ventilator therapy
  6. Tracheostomy or neck deformities
  7. Neuro-muscular dysfunction or disability (i.e., Paralysis due to cerebrovascular disease) which may make it impossible to use the device safely
  8. Congestive heart failure (decompensated)
  9. Any other mucolytic therapy
  10. Significant hiatus hernia or gastro-esophageal reflux disease
  11. Recent myocardial infarction or unstable angina

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): NCT00863616

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United Kingdom
East & North Herts NHS Trust
Stevenage, Herts, United Kingdom, SG1 4AB
Sponsors and Collaborators
East and North Hertfordshire NHS Trust
Electromed, Inc.
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Principal Investigator: Indranil Chakravorty, PhD, MRCP East & North Herts NHS Trust, Stevenage, Herts, UK
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Indranil Chakravorty/ Consultant Physician, East & North Herts NHS Trust Identifier: NCT00863616    
Other Study ID Numbers: 06/Q0303/57
First Posted: March 18, 2009    Key Record Dates
Last Update Posted: March 18, 2009
Last Verified: March 2009
Keywords provided by East and North Hertfordshire NHS Trust:
Mucus hypersecretion
Additional relevant MeSH terms:
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Lung Diseases
Lung Diseases, Obstructive
Pulmonary Disease, Chronic Obstructive
Respiratory Tract Diseases