The Nurse Wants to Maintain the Integrity of a Peripheral

The nurse wants to maintain the integrity of a peripheral venous catheter. According to Infusion Nurses Society Standards of Practice (2011) , peripheral intermittent locking devices must be kept patent following each catheter use with:

A) heparin.
B) medication.
C) 0.9% bacteriostatic sodium chloride.
D) combination of sodium chloride followed by heparin flush.