Deventilation Dyspnea in Patients With Chronic Obstructive Pulmonary Disease After Switching Off From Non-invasive Ventilation
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Enrollment
- 10
- Locations
- 1
- Primary Endpoint
- Respiratory muscle activity
Study Overview
Brief Summary
Non-invasive ventilation (NIV) has shown to be an effective therapy for patients with Chronic Obstructive Pulmonary Disease (COPD) with Chronic Hypercapnic Respiratory Failure (CHRF). However, these COPD patients often report severe dyspnoea after switching off from NIV therapy, which leads to discomfort and distress. Currently, it is not known what causes this deventilation dyspnoea and therefore a possible treatment to prevent deventilation dyspnoea is not available. This study investigates possible mechanisms underlying the phenomenon of deventilation dyspnoea in COPD patients by monitoring the effects of NIV on the patient during an afternoon sleep.
Detailed Description
Rationale: Non-invasive ventilation (NIV) has shown to be an effective therapy for patients with Chronic Obstructive Pulmonary Disease (COPD) with Chronic Hypercapnic Respiratory Failure (CHRF). However, these COPD patients often report severe dyspnoea after switching off from NIV therapy, which leads to discomfort and distress. Currently, it is not known what causes this deventilation dyspnoea and therefore a possible treatment to prevent deventilation dyspnoea is not available.
Objective: 1) To investigate what mechanisms underlie the phenomenon of deventilation dyspnoea in COPD patients. 2) To investigate how the change in electrical impedance, measured with electrical impedance tomography (EIT), is related to the change in inspiratory capacity (IC) before and after sleep.
Study design: This study is an observational cohort study analysing changes occurring due to NIV which could explain the existence of deventilation dyspnoea in certain COPD patients using NIV. Ten patients with and ten patients without deventilation dyspnoea will visit the hospital for an afternoon sleep, during and after which several non-invasive measurements are performed to analyse the changes occurring during and after switching off NIV. In order to investigate the deventilation problem, we will measure:
- the degree of hyperinflation due to NIV: this will be assessed by measuring the change in end-expiratory lung volume (EELV) with EIT before, during and after NIV, and the change in IC before and after sleeping with NIV.
- the reduction of respiratory muscle activity due to NIV: this will be assessed by the change in electromyography of the frontal diaphragm before, during and after NIV.
- the effectiveness of NIV in reducing CO2 level: this will be assessed with transcutaneous CO2 measurements (PtcCO2) before, during and after NIV.
- the degree of deventilation dyspnoea before and after the afternoon sleep: this will be assessed with a 10-point Borg Scale.
Study population: Twenty severe COPD patients (age>18yr) using chronic NIV will be included in the study: 10 patients with severe symptoms of deventilation dyspnoea (Borg Dyspnoea Scale ≥ 5) and 10 patients without symptoms of deventilation dyspnoea, matched with regard to the degree of static lung hyperinflation and NIV settings.
Study Design
- Study Type
- Observational
- Observational Model
- Case Control
- Time Perspective
- Cross Sectional
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •COPD with a NIV indication using chronic NIV
- •Age > 18 years
- •With or without deventilation dyspnea when switching off from NIV (depending on group/cohort)
- •Written informed consent is obtained
Exclusion Criteria
- •COPD exacerbation within 2 weeks preceding the study
- •Modification of ventilation within 2 weeks preceding the study
- •Having a poor compliance with NIV (usage of <4 h/day)
- •Having other disorders leading to respiratory failure (such as morbid obesity, kyphoscoliosis, neuromuscular diseases, tuberculosis)
- •Not being able to sleep 1.5 hour in the afternoon
- •Having spinal injury, BMI>50, damaged or inflamed skin around the thorax or a cardiac pacemaker or other implanted devices
Outcomes
Primary Outcomes
Respiratory muscle activity
Time Frame: Through study completion, which is one day of NIV use. Compare the primary outcome before and after the afternoon sleep.
The change in respiratory muscle activity due to NIV-usage
Inspiratory capacity
Time Frame: Through study completion, which is one day of NIV use. Compare the primary outcome before and after the afternoon sleep.
The change in inspiratory capacity due to NIV-usage
Transcutaneous carbon dioxide
Time Frame: Through study completion, which is one day of NIV use. Compare the primary outcome before and after the afternoon sleep.
The change in transcutaneous carbon dioxide due to NIV-usage
End-expiratory lung volume
Time Frame: Through study completion, which is one day of NIV use. Compare the primary outcome before and after the afternoon sleep.
The change in end-expiratory lung volume due to NIV-usage
Secondary Outcomes
- Correlation of inspiratory capacity with end-expiratory lung volume(Through study completion, which is one day of NIV use. Compare the primary outcome before and after the afternoon sleep.)
Investigators
Marieke Duiverman
Post-doc, Pulmonary physician
University Medical Center Groningen