Is there a maximum dose as to how much heparin flush a pediatric patient can have in a 24-hour period. We use a 10 unit per mL syringe which is 3 mL, totalling to 30 units per flush. If the patient has 4 PIVs multiply that to the number of IV meds he/she gets in a 24-hour period, that is a lot of Heparin in there. Or should we just stick to saline flushes? Any ideas please. I will need references too if possible. Thank you.