The Nurse Provides Care to a Patient with an Arterial

The nurse provides care to a patient with an arterial line. Which is the priority nursing action when providing care to this patient?

A) Labeling the line, "No IV medications"
B) Observing the pulse oximetry waveform every shift
C) Flushing the arterial line every hour to prevent clotting
D) Ensuring the site used for the line is covered with an occlusive dressing