It is mentioned that 58 patients in the conservative-oxygen group had a median of 2 ABG readings less than the threshold of 55 mmHg for the PaO2. Were the 5 adverse events for mesenteric ischemia from this group of 58? Secondly, do you feel that having more difficulty keeping the conservative-oxygen group within the parameters of 55-70 mmHg for the PaO2 was a concern for internal validity for the study?
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