A nurse is flushing a patient’s implanted port after adminis- tering medications. The nurse observes that the port flushes, but does not have a blood return. What would be the nurse’s next action...

A nurse is flushing a patient’s implanted port after adminis-
tering medications. The nurse observes that the port flushes,

but does not have a blood return. What would be the nurse’s
next action based on these findings?
a. Gently push down on the needle and flush it a second time.
b. Stop flushing and remove the needle; notify the primary
care provider.
c. Ask the patient to perform a Valsalva maneuver; change
the patient position.
d. Close the clamp; wait 3 minutes, try flushing the port
again.