- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01750489
Muscle Dysfunction in Patients With Chronic Obstructive Lung Disease (COPD): the Role of Sympathetic Activation
Skeletal and Respiratory Muscle Dysfunction in Patients With COPD: the Role of Sympathetic Activation
The objective of the project is to better understand the causes of exercise limitation, dyspnea and neurohumoral activation in patients with COPD. In particular, the investigators aim to explore the mutual interaction of neurohumoral activation and exercise limitation thereby focussing on differential effects of the peripheral muscle and the diaphragm.
Eventually the findings might influence treatment modalities. If sympathetic activation contributes to exercise limitation then drugs influencing the autonomic nervous system would be a reasonable therapeutic concept. If a reduction of sympathetic activity due to an alteration of the ergoreflex can be achieved by non-invasive ventilation this would help to improve dyspnea and exercise capacity.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Study Type
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
-
Goettingen, Germany, 37075
- Universitaetsmedizin Goettingen
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Diagnosis of COPD II or III according to the GOLD guidelines
- FEV1 of less than 60% of the predicted value
- RV/TLC > 45%
- Optimal stable medication according to the GOLD guidelines for at least 2 weeks
- The last exacerbation must not be more recent than three weeks
- Stable sinus rhythm
- The subgroup on NIV should be stable on NIV for > 1 month
Exclusion Criteria:
- not willing or unable to sign the informed consent before the study begins
- Age under 30 or over 80 years
- paO2< 55 mmHg or PaCO2 > 45 mmHg on arterial blood gas analysis (For patients on NIV, PaCO2 values of up to 55 mmHg are acceptable.)
- Treatment with drugs having direct sympathomimetic activity (e.g. theophylline, moxonidine, clonidine)
- Oral medication with beta2 sympathomimetics (therapy with long-acting inhaled beta2 sympathomimetics is permitted)
- History of sleep apnoea or documented evidence of > 15 episodes of apneas and/or hypopnea per hour during sleep. An episode of apnea is defined as the cessation of inspiratory airflow for 10 s or more. Hypopnea is defined as a reduction in airflow (> 50%) lasting for more than 10 s in comparison with the maximum airflow recorded during the preceding breathing cycle.
- Myocardial infarction (MI) or a coronary revascularization procedure within the previous 2 calendar months
- Clinically evident polyneuropathy
- Diabetes mellitus necessitating any pharmacologic therapy
- Severe (i.e., life-limiting) concomitant disease, including life-threatening malignancy (cancer likely to reduce life expectancy to less than 5 years), acquired immune deficiency syndrome, or any other life-threatening disease.
- Diuretics should not be taken before measurements
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
No Intervention: COPD
|
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Experimental: COPD with non-invasive ventilation (NIV)
Starting non-invasive ventilation with the patient's own device during registration of MSNA.
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No Intervention: Healthy control subjects
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
muscle sympathetic nerve activity (MSNA)
Time Frame: 90 minutes
|
In a 90 minute microneurographic measurement muscle sympathetic nerve activity is assessed.
|
90 minutes
|
Arterial stiffness
Time Frame: 90 min
|
90 min
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
VE/VCO2
Time Frame: During 8-15 minutes bicycle exercise
|
During 8-15 minutes bicycle exercise
|
Collaborators and Investigators
Investigators
- Principal Investigator: Stefan Andreas, Professor, Universitaetsmedizin Goettingen
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- RA1937/1-1
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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