The Nurse Is Caring for an Acutely Ill Patient Who $\mathrm{pH}$

The nurse is caring for an acutely ill patient who has central venous pressure monitoring in place. What intervention should be included in the care plan of a patient with CVP in place?

A) Apply antibiotic ointment to the insertion site twice daily.
B) Change the site dressing whenever it becomes visibly soiled.
C) Perform passive range-of-motion exercises to prevent venous stasis.
D) Aspirate blood from the device once daily to test $\mathrm{pH}$ .