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Are home ventilators able to guarantee a minimal tidal volume?
Brigitte Fauroux1, Karl Leroux, Jean-Louis Pépin
1Pediatric Pulmonary Department, Research Unit, National Reference Center for Rare Lung Diseases, INSERM, UMR S-938, AP-HP, Hôpital Armand-Trousseau, Université Pierre et Marie Curie-Paris 6, 75012, Paris, France. brigitte.fauroux@trs.aphp.fr
Intensive Care Medicine
|March 11, 2010
Summary
Home ventilators with volume guarantee effectively manage airway resistance and lung compliance changes. However, they struggle with non-intentional leaks, causing tidal volume variations and patient-ventilator dyssynchrony.
Area of Science:
- Respiratory physiology
- Medical device engineering
- Critical care medicine
Background:
- Alveolar hypoventilation poses challenges for mechanical ventilation.
- Home ventilators with volume guarantee aim to ensure adequate tidal volumes.
- Assessing ventilator performance under various physiological conditions is crucial.
Purpose of the Study:
- To evaluate the efficacy of home ventilators in maintaining minimal tidal volume.
- To assess performance during conditions mimicking alveolar hypoventilation.
- To identify limitations of volume guarantee features in home ventilation.
Main Methods:
- Bench evaluation of six home ventilators with volume guarantee modules.
- Testing under baseline, increased airway resistance, decreased lung compliance, and non-intentional leak conditions.
- In vivo validation of non-intentional leak performance in healthy subjects.
Main Results:
- All tested ventilators successfully maintained minimal tidal volume with increased airway resistance and decreased lung compliance.
- Performance degraded significantly during non-intentional leaks, showing large tidal volume variations.
- Patient-ventilator dyssynchrony and pressure support delivery defaults were observed with leaks.
Conclusions:
- Home ventilators with volume guarantee are effective in stable conditions of increased resistance and decreased compliance.
- Non-intentional leaks represent a significant challenge for current home ventilator technology.
- Further improvements are needed to ensure reliable tidal volume delivery in the presence of leaks.
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