What is a standard approach to maintaining PICC patency after use?

• A. Flush with 10 mL NS per policy every 4-8 hours and after use; pulsatile technique; correct cap technique based on cap type
• B. Do not flush after any use
• C. Flush only with heparin
• D. Remove and replace catheter weekly

Answer: (A)

Maintaining PICC patency relies on keeping the catheter lumen clear and the connections closed and sterile. Flushing with normal saline, using a push-pause (pulsatile) technique, and applying the correct cap technique are together designed to prevent clot formation and keep the line open after use. Flushing with 10 mL of NS per policy at regular intervals (every 4–8 hours) and after each use clears residual blood and IV solutions, reducing stagnation that can lead to occlusion. The pulsatile push-pause method adds small, intermittent flows that help shear any forming clots off the inner walls rather than creating a stagnant stream. Proper cap technique, matching the cap type to the access device, ensures a secure, sterile, closed system, preventing air entry and debris that could block flow.

Not flushing after use increases the risk of thrombus formation and occlusion. Flushing only with heparin isn’t universally recommended and carries risks like heparin-induced thrombocytopenia in some patients. Removing and replacing the catheter weekly is unnecessary and exposes the patient to repeated insertion risks without improving patency.