Before a ventilator is used, an operational verification check is performed. A simple variation of this procedure is also performed under which of the following circumstances?
a. Before a blood gas sample is obtained.
b. When the physician's order specifies a change in ventilator settings.
c. Before a patient is reconnected to a venti-lator after the ventilator circuit has been changed or disassembled for any reason.
d. Before the patient's hemodynamic status is monitored.
ANS: C
Options A, B, and D refer to times when a patient-ventilator system checks are performed.
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