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Tolerance to Electrostimulation in COPD Patients (TOES)

This study has been completed.
Information provided by:
Laval University Identifier:
First received: December 16, 2008
Last updated: June 9, 2010
Last verified: September 2008

The study was designed to test the following hypothesis

Patients with high cardio-respiratory response to electrostimulation (ES), high perception of pain during ES and high ES-induced muscle fatigue, have low tolerance to ES (more difficulties to increase intensity during training).

Condition Intervention
Device: Neuromuscular Electrical stimulator (Cefar rehab 4 pro)

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Screening
Official Title: Investigation of Clinical Tolerance, Cardio-respiratory Response and Muscle Fatigue During Electrostimulation

Resource links provided by NLM:

Further study details as provided by Laval University:

Primary Outcome Measures:
  • Tolerance to ES = Change in ES intensity between session 2 and 3 (delta intensity) [ Time Frame: 1 week ]

Secondary Outcome Measures:
  • Cardiorespiratory response during ES [ Time Frame: 1 week ]
  • Muscle fatigue after ES [ Time Frame: 1 week ]
  • Body composition [ Time Frame: 1 week ]
  • Perception of pain at session 2 (symptoms on Visual Analogic Scale) [ Time Frame: 1 week ]
  • Plasmatic proteins after ES [ Time Frame: 1 week ]

Enrollment: 20
Study Start Date: December 2008
Study Completion Date: August 2009
Primary Completion Date: August 2009 (Final data collection date for primary outcome measure)
Intervention Details:
    Device: Neuromuscular Electrical stimulator (Cefar rehab 4 pro)
    50Hz 30 min 7 sessions
    Other Name: NMES
Detailed Description:

Background: Muscle electrostimulation (ES) appears as a promising alternative to general physical reconditioning in advanced COPD and its feasibility has been confirmed in this population. However, patients are not equal in tolerance to ES. Certain patients are not able to increase ES intensity during training, limiting its benefits. Furthermore, little is known about the effect of one ES training session on cardio-respiratory response, muscle fatigue and systemic inflammation in COPD patients.

Objective: To evaluate the tolerance to ES in COPD patients and to identify the physiological parameters involved in ES tolerance.

Method: We propose to conduct a prospective study including 21 COPD patients of different pulmonary severity (7 in each group of GOLD II, III and IV). Patients will be evaluated 3 times: at day 1, day 2 and day 9. In the first session, patients will be initiated to ES and evaluated in walking distance. In the second session, patients will become autonomous with ES and they will be evaluated in muscle strength and body composition. In the third session, cardio-respiratory measurements will be performed during ES and patients will be evaluated in muscle strength and systemic inflammation (blood sampling) before and after ES. Between the 2d and the 3d sessions, patients will have to perform 5 ES sessions at home (from day 3 to day 8). Tolerance (symptoms assessed with visual analogical scale (VAS)) and intensity of ES will be measured during each ES session.

Planning analysis: The main outcome will be the change in ES intensity between session 2 and 3 (delta intensity). The other end-points will be minute ventilation, heart rate, VO2 and SaO2 during ES, but also change in ES tolerance (VAS) during ES at equal ES intensity, leg muscle fatigue after ES, body composition and changes in plasmatic proteins after ES. Simple and multiple regressions analysis will be done between delta intensity and 1/cardio-respiratory response during ES, 2/muscle fatigue after ES, 3/body composition, 4/perception of pain at session 2 (VAS), 5/changes in plasmatic proteins after ES.


Ages Eligible for Study:   40 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Subject is diagnosed with COPD.
  • 40 years-old and older
  • Currently or previously smoking with a smoking history of at least 10 pack-years
  • Subject understands and is able to read and write French or English

Exclusion Criteria:

  • absence of neuromuscular pathology
  • absence of vascular pathology
  • absence of dermatosis on legs
  Contacts and Locations
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Please refer to this study by its identifier: NCT00809120

Canada, Quebec
Hôpital Laval
Quebec City, Quebec, Canada, G1V4G5
Sponsors and Collaborators
Laval University
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Dr François Maltais, Laval University Identifier: NCT00809120     History of Changes
Other Study ID Numbers: CER20357
Study First Received: December 16, 2008
Last Updated: June 9, 2010

Keywords provided by Laval University:
Muscle fatigue
Cardio-respiratory response processed this record on April 26, 2017