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[Determination of Hypercapnic Ventilatory Response in COPD Patients]
K Sohrabi1, M Scholtes1, L Mursina1
1Technische Hochschule Mittelhessen, Gießen, Fachbereich Gesundheit.
Pneumologie (Stuttgart, Germany)
|October 13, 2015
Summary
This study found that the hypercapnic ventilatory response (HCVR) is reduced in COPD patients, with a more significant reduction in advanced GOLD stages. The new MATAM device feasibility for measuring HCVR in COPD patients was demonstrated.
Area of Science:
- Respiratory Physiology
- Pulmonary Medicine
- Medical Device Technology
Background:
- Reduced hypercapnic ventilatory response (HCVR) is observed in Chronic Obstructive Pulmonary Disease (COPD) patients.
- The relationship between HCVR and COPD severity (GOLD stages) remains unclear.
- HCVR measurement is a key method for assessing breathing control feedback.
Purpose of the Study:
- To introduce and assess the feasibility of a novel automated device, MATAM, for measuring and interpreting HCVR.
- To investigate the association between HCVR and COPD GOLD stages.
Main Methods:
- Development of the MATAM device for standardized, automatic measurement of HCVR.
- Recordings in a closed system allowing controlled gas component changes.
- Plotting minute ventilation against end-tidal CO2 to define HCVR as a linear regression slope.
- Studied 28 COPD patients (GOLD stages 0-IV).
Main Results:
- The MATAM device proved feasible for measuring HCVR in COPD patients.
- A significant inverse correlation was found between COPD severity (GOLD stage) and HCVR.
- More severe COPD stages were associated with a markedly reduced HCVR.
Conclusions:
- HCVR measurement using the MATAM device is feasible in COPD patients.
- Reduced HCVR in more severe COPD may indicate decreased chemosensitivity due to long-term changes in blood pH and pCO2.
- Further validation of MATAM in healthy individuals and other patient groups is warranted.
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