MedTrace Logo

Non Invasive Evaluation of Muscle Hypoxia in COPD Patient (EVANIMUS)

NCT03921983 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 70

Last updated 2019-04-19

No results posted yet for this study

Summary

Peripheral muscle oxidative function is altered in COPD(chronic obstrutive pulmonary disease) patients. Multiple factors could contribute to this dysfunction including chronic hypoxia and deconditioning (sedentarity).

The evaluation of mitochondrial function is based on invasive method (muscle biopsy and in vitro respirometry) or magnetic resonance spectroscopy limited to small muscle groups. Recently, a non invasive method has been described using Near InfraRed Spectroscopy (NIRS). During arterial occlusion, muscle deoxygenation is only dependent of local oxygen consumption. The time constant recovery (k) of the deoxygenation during repeated ischemia periods has been shown to be correlated to measurements of maximal mitochondrial capacity.

k is lower in COPD patients compared to smokers without bronchial obstruction. However, the influence of arterial hypoxia has never been studied precisely, no more than the confounding effect of deconditioning on k.

So , the aim is to compare k in COPD patients with chronic hypoxemia (treated with long term oxygenotherapy, LTOT+ group) and patients without hypoxia, matched for their physical activity (LTOT- group).

The hypothe is that k will be lower in LTOT+ group compared to LTOT- group and that short term O2 supplementation will improve it, which would suggest a muscle hypoxia. By contrast, O2 should not influence k in LOT- group, in whom it is mainly determined by muscle conditioning.

Conditions

  • COPD (Chronic Obstructive Pulmonary Disease)
  • Hypoxemia

Interventions

OTHER

Oxygen supplementation

short term O2 supplementation during 1 hour

Sponsors & Collaborators

  • University Hospital, Clermont-Ferrand

    lead OTHER

Principal Investigators

  • Frédériv Costes, MD, PhD · University Hospital, Clermont-Ferrand

Study Design

Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2019-07-01
Primary Completion
2020-01-01
Completion
2020-12-31

Countries

  • France

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03921983 on ClinicalTrials.gov