- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05962164
Passive Heat Therapy for People With COPD (COPD)
December 20, 2023 updated by: Neil Eves, University of British Columbia
The Acute and Chronic Benefits of Passive Heat Therapy for People With COPD
People with Chronic Obstructive Pulmonary Disease (COPD) often develop high blood pressure and heart disease due to their sedentary lifestyle and difficulty exercising.
The investigators will test if heating can mimic the health benefits of exercise by monitoring the increase in leg blood-flow using ultrasound during a 45-minute hot-water footbath.
The patients will then undergo 6-weeks of hot-water footbaths to examine whether the changes to blood-flow lead to improvements in blood pressure and other indicators of heart disease risk.
Study Overview
Status
Recruiting
Conditions
Intervention / Treatment
Detailed Description
People with COPD are at higher risk of developing cardiovascular disease (CVD).
While exercise training is a potent therapy for CVD, people with COPD have a low tolerance for exercise due to dyspnea and premature muscle fatigue.
Thus, there is a need to develop more effective strategies to improve CVD risk in people with COPD.
A novel way to reduce blood pressure and enhance arterial health is with passive heat therapy (PHT).
An acute 45-min bout of lower limb hot-water immersion has been shown to increase leg blood flow and reduce blood pressure in healthy older adults, suggesting that PHT could have similar hypotensive and anti-atherosclerotic effects as exercise.
Augmenting leg blood flow with PHT may also have functional benefits by reducing peripheral muscle fatigue and improving exercise tolerance.
No study to date has looked at the acute and chronic hemodynamic and vascular responses to PHT in people with COPD, nor whether it can acutely or chronically improve exercise tolerance.
Study Type
Interventional
Enrollment (Estimated)
32
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 Contact
- Name: Neil Eves, PhD
- Phone Number: (250) 807-9676
- Email: neil.eves@ubc.ca
Study Contact Backup
- Name: Kyla Coates, MSc
- Phone Number: (250) 661-7207
- Email: kyla.coates@ubc.ca
Study Locations
-
-
British Columbia
-
Kelowna, British Columbia, Canada, V1V2L2
- Recruiting
- University of British Columbia
-
Contact:
- Neil Eves, PhD
- Phone Number: 250-807-9676
- Email: neil.eves@ubc.ca
-
-
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
- Adult
- Older Adult
Accepts Healthy Volunteers
No
Description
Inclusion Criteria:
- Non-smoking individuals
- >40 years of age
- Stable (exacerbation free for >6 weeks), moderate-to-severe COPD (post bronchodilator FEV1/FVC <lower limit of normal and FEV1 z-score <2.51)
Exclusion Criteria:
- Performing structured exercise training (i.e. pulmonary rehabilitation)
- Have advanced cardiac or cerebrovascular disease (i.e. a history of heart failure, previous stroke or myocardial infarction)
- Have uncontrolled hypertension (>160/95 mmHg at rest)
- Have hypotension (<110/60 mmHg)
- Are taking Beta Blockers
- Regularly (>1/week) have hot baths (>30 min) or use a hot tub or sauna.
Exclusion Criteria for exercise outcomes:
- Have resting blood pressure > 150/95 mmHg
- On supplemental oxygen for hypoxemia.
- Musculoskeletal pain that limits their ability to perform stationary cycling.
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: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Passive Heat Therapy
Patients with COPD assigned to passive heat therapy will have their lower legs immersed in a circulating hot water (~42°C) footbath for 45 min per session.
|
The intervention will consist of 6 weeks of repeated (3x/week) 45-min lower-leg immersions.
Other Names:
|
Sham Comparator: Sham Immersion
Patients with COPD assigned to the sham condition will have their lower legs immersed in a circulating thermoneutral (~36°C) footbath for 45 min per session.
|
The sham intervention will consist of 6 weeks of repeated (3x/week) 45-min lower-leg immersions.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mean 24-hour ambulatory blood pressure following chronic passive heat therapy
Time Frame: 6 weeks
|
The change in 24-hour ambulatory systolic, diastolic and mean arterial blood pressure from baseline to post intervention.
|
6 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Flow mediated dilation of the superficial femoral artery following chronic passive heat therapy.
Time Frame: 6 weeks
|
The change in the percent dilation of the superficial femoral artery (measured using ultrasound) in response to reactive hyperemia (from a 5-min supra-systolic occlusion) from baseline to post intervention.
|
6 weeks
|
Arterial stiffness following chronic passive heat therapy
Time Frame: 6 weeks
|
The change in pulse wave velocity (m/s) measured by applanation tonometry from baseline to post intervention.
|
6 weeks
|
Exercise tolerance following chronic passive heat therapy
Time Frame: 6 weeks
|
The change in constant load exercise time (seconds) at 75% of peak power from baseline to post intervention.
|
6 weeks
|
The acute changes in leg blood flow from a single bout of passive heat therapy
Time Frame: During procedure: 60-minutes
|
Superficial femoral artery blood flow (mL/min) will be measured by duplex ultrasound.
Measurements will be taken every 15-min throughout immersion until 15-min following the first session of passive heat therapy or Sham treatment.
|
During procedure: 60-minutes
|
The acute changes in superficial femoral artery shear stress from a single bout of passive heat therapy
Time Frame: During procedure: 60-minutes
|
Superficial femoral artery shear stress (1/s) patterns will be measured by duplex ultrasound.
Measurements will be taken every 15-min throughout immersion until 15-min following the first session of passive heat therapy or Sham treatment.
|
During procedure: 60-minutes
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The acute change in exercise tolerance following a single bout of PHT vs. the change with sham treatment
Time Frame: ~48 hours
|
Constant load exercise time to exhaustion (seconds) at 75% of Peak Power will be completed at baseline and 15-min after PHT or Sham Immersion.
The change in post-PHT time to exhaustion from the baseline exercise trial will be compared with the change in post-sham time to exhaustion from the baseline exercise trial.
|
~48 hours
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Neil Eves, PhD, Associate Professor
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 (Actual)
August 17, 2023
Primary Completion (Estimated)
December 31, 2024
Study Completion (Estimated)
December 31, 2024
Study Registration Dates
First Submitted
June 30, 2023
First Submitted That Met QC Criteria
July 18, 2023
First Posted (Actual)
July 27, 2023
Study Record Updates
Last Update Posted (Actual)
December 22, 2023
Last Update Submitted That Met QC Criteria
December 20, 2023
Last Verified
December 1, 2023
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- H21-01868
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
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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