Clamps: Open-ended catheters—flush with heparin.

No Clamps: Valve-tip catheters do not have clamps—flush with NS using positive-pressure flush technique.

End-Caps: Change every 7 days or as needed.

Syringe Size: Use 10-mL syringe or greater—smaller syringes produce higher pressure, which can damage catheter.

Positive-Pressure Flush: Remove needle or needleless syringe while injecting last 0.5 mL of NS.