Each cadaver was orotracheally intubated and ventilated with a ["the" is also possible but seems less likely; it would mean that you used the same bag for every cadaver, and that this was significant enough to note] self-inflating bag 12 times per minute. The CS technique was performed following the standard ATLS procedure [3]. The insertion site was in the 5th intercostal space at the nipple level, just anterior to the midaxillary line.
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