1. From: Continuous Positive Airway Pressure Mitigates Opioid-induced Worsening of Sleep-disordered Breathing Early after Bariatric Surgery
Anesthes. 2016;125(1): doi: /ALN
Figure Legend:
Schematic of the high-flow continuous positive airway pressure (CPAP) circuit as described by Hess et al.14 Inspiratory gas was mixed from a high-pressure room air and oxygen source using an oxygen blender (Hans Rudolph, USA) to provide a constant fraction of inspired oxygen of 0.3 to the circuit. The outlet of the oxygen blender was connected to a reservoir balloon and the CPAP facemask without an expiration valve (Respironics Inc., USA). Inhaled gas was warmed and humidified by a humidifier connected downstream of the flowmeter. The open end of the circuit was either left open to the atmosphere during atmospheric pressure treatment or connected to a 10 cm H2O positive end-expiratory pressure valve during CPAP treatment. A pneumotachograph (Hans Rudolph) was connected serial between tubing and oronasal CPAP mask. Pressure probe of the polysomnography equipment was connected to the CPAP mask in parallel to the CPAP tubing.
Date of download: 11/7/2017
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