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From: Mask Ventilation during Induction of General Anesthesia:Influences of Obstructive Sleep Apnea
Anesthes. 2017;126(1): doi: /ALN Figure Legend: Differences of tidal volume and end-tidal carbon dioxide concentration during the fifth breath mask ventilation (MV) among three distinctive capnogram waveforms (V1: normal capnogram with the presence of phase III, V2: subnormal capnogram with the presence of phase II but lack of phase III, and V3: abnormal capnogram without capnogram waveform). Median values are indicated by horizontal bar within each box; bars above and below each box represent 25th and 75th percentiles, and the end of vertical lines denote minimum and maximum. Outliers are presented by closed circles. Note that the capnogram waveform patterns appear to distinguish the ranges of tidal volume during MV. Date of download: 1/3/2018 Copyright © 2018 American Society of Anesthesiologists. All rights reserved.
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