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A nasal CPAP system
Author(s) -
THOMAS A. N.,
RYAN J. P.,
DORAN B.,
POLLARD B. J.
Publication year - 1992
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.1992.tb02171.x
Subject(s) - medicine , nose , breathing , anesthesia , continuous positive airway pressure , mouth breathing , surgery , obstructive sleep apnea
Summary Nasopharyngeal pressures were compared in eight subjects breathing through either a nasal CPAP system or facemask CPAP system at afresh gas flow of 50, 75 and 100 l.min −1 . During nose breathing there was no significant difference in nasopharyngeal pressure between the two systems. During mouth breathing pressures were significantly lower with nasal CPAP. During nose breathing at 75 l.min −1 the mean inspiratory and expiratory pressures in cmH 2 O (SD) were 3.4 (0.68) and 5.9 (0.55) for nasal CPAP and 3.3 (0.71) and 6.3 (0.73) for facemask CPAP. The respective pressures during mouth breathing were 0.3 (0.73) and 2.9 (1.74) for nasal CPAP and 3.9 (0.73) and 5.8 (0.82) for facemask CPAP.