The study, known as PreVent and conducted at seven ICUs in the United States, found that when bag-mask ventilation was performed, the lowest median oxygen saturation was 96 percent. Without bagging, it was 93 percent.
The difference in rates of aspiration between the two groups was not statistically significant.
“We’re talking about bagging for one minute. We’re talking about squeezing a bag nine times,” said Dr. Casey. “If you bag for many minutes, maybe eventually vomiting would be a problem. The period doesn’t seem to be long enough to cause problems. If there is an effect, it does appear to be small, not the large effect people worry about.”
The study was funded by the Vanderbilt Institute for Clinical and Translational Research.
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