Article Figures & Data
Figures
- Fig. 1.
The Boussignac continuous positive airway pressure (CPAP) is a small plastic cylinder that attaches to a face mask. The distal connector at the device's open end connects to the driving gas (air or O2), and the proximal connector on the patient side allows either oxygen supplementation or mask-pressure measurement.
- Fig. 2.
Setup for aerosol particle size measurement. A: Boussignac continuous positive airway pressure (CPAP) device, connected to a compressed air source. B: Heat-and-moisture exchanger. C: T-piece. D: Nebulizer. E: T-piece. F: Laser diffraction particle sizer and counter. G: Ventilator circuit, leading to a pump.
- Fig. 3.
Relationship between the nebulizer driving gas flow and continuous positive airway pressure (CPAP) generated in the mask, with the Boussignac CPAP system during inspiration, expiration, or without CPAP.
- Fig. 4.
Absolute humidity during the tested ventilation conditions. Continuous positive airway pressure (CPAP) was driven with dry compressed air. Adequate humidification was provided with heat-and-moisture exchanger (HME) or heated humidifier.
- Fig. 5.
A: Work of breathing before and after nebulized terbutaline delivered via standard nebulization method versus delivered during continuous positive airway pressure (CPAP). WOB decreased similarly with the 2 methods (P = .06). B: PaO2 and PaCO2 after nebulized terbutaline delivered via standard nebulization method versus delivered during CPAP. PaO2 was significantly higher with CPAP nebulization. PaCO2 was not significantly different between the 2 methods.
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