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Updated: Jun 18, 2026

Preoxygenation Techniques for Tracheal Intubation in Critically Ill Adults Utilizing Oxygen Mask and Noninvasive Ventilation

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Pressure stability with CPAP devices: A bench evaluation.

Bruno Louis¹, Karl Leroux, Maud Boucherie

¹INSERM, Unit 841, and Université Paris 12, Faculté de Médecine, Créteil F94010, France.

|November 7, 2009

Summary

This summary is machine-generated.

Continuous positive airway pressure (CPAP) devices vary in performance. One device, which adjusted for pressure loss, outperformed others in reducing work of breathing (WOB) during simulated challenging conditions.

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Published on: March 21, 2013

Area of Science:

Respiratory physiology
Medical device engineering

Background:

Continuous positive airway pressure (CPAP) is crucial for reducing patient work of breathing (WOB).
Understanding device-specific performance is vital for effective respiratory support.

Purpose of the Study:

To quantify the additional work of breathing (WOB) imposed by four contemporary CPAP devices.
To evaluate device performance under simulated difficult clinical scenarios, including leaks.

Main Methods:

Simulated patient respiratory system compliance, lung-airway resistance, and flow contours.
Tested CPAP devices at 15cm H2O with humidification, nasal pillows, and simulated leaks (0-1 L/s).

Main Results:

Positive end-expiratory pressure (PEEP) at the interface varied significantly with and without leaks.
Imposed inspiratory and expiratory work of breathing (WOB) ranged from <0.1 J/min to 0.45 J/min, widening with leaks.

Conclusions:

Significant variability exists in the performance of current CPAP devices.
A device capable of dynamic calibration for circuitry pressure loss demonstrated superior performance.