Heparin IV Flush Heparin Sodium, Porcine 100 U/mL Prefilled Flush Syringes 3 mL, 60/BoxMedefil MIH 3323 Heparin IV Flush Heparin Sodium, Porcine 100 U mL Prefilled Flush Syringes 3 mL is sterile, single dose, disposable, plastic pre filled syringe. The DEVICE consists of a hypodermic syringe with a hypodermic barrel, stopper plunger, plunger rod, tip cap and Heparin Lock Flush Solution USP. Heparin I. V. Flush Syringe. Heparin is an anticoagulant (blood thinner) that prevents the formation of blood clots. Heparin flush is used to flush