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Effectiveness of Breathing through Nasal and Oral Routes in Unconscious Apneic Adult Human Subjects

Yandong Jiang, Fang Ping Bao, Yafen Liang, William R. Kimball, Yanhong Liu, Warren M. Zapol, Robert M. Kacmarek
2011 Anesthesiology  
The authors hypothesized that mouth ventilation by a resuscitator via the nasal route ensures a more patent airway and more effective ventilation than does ventilation via the oral route and therefore would be the optimal manner to ventilate adult patients in emergencies, such as during cardiopulmonary resuscitation. They tested the hypothesis by comparing the effectiveness of mouth-to-nose breathing (MNB) and mouth-to-mouth breathing (MMB) in anesthetized, apneic, adult subjects without muscle
more » ... ects without muscle paralysis. Methods: Twenty subjects under general anesthesia randomly received MMB and MNB with their heads placed first in a neutral position and then an extended position. A single operator performed MNB and MMB at the target breathing rate of 10 breaths/min, inspiratory:expiratory ratio 1:2 and . Information on purchasing reprints may be found at or on the masthead page at the beginning of this issue. ANESTHESIOLOGY's articles are made freely accessible to all readers, for personal use only, 6 months from the cover date of the issue.
doi:10.1097/aln.0b013e31821d6c69 pmid:21572315 fatcat:tvm7e53wpfchta6ohvoufbbcde