• Practice points General
  • Neonatal Intensive Care Drug Manual




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    Pharmacokinetics

    Studies of heparin in newborns are limited but show that the clearance is faster than for older children because of a larger volume of distribution. It is metabolised by liver and excreted renally within 6 hours, but may be delayed. Half-life is dose-dependent, but averages 1 to 3 hours. Efficacy in neonates may be low due to low antithrombin plasma concentrations.1



    Practice points

    General

    There are no data from randomised controlled trials to recommend or refute the use of heparin for treatment of neonatal thrombosis.2



    Dose

    Antithrombotic prophylaxis

    Loading doses and maintenance doses have been adapted from the American College of Chest Physicians Evidence-Based Clinical Practice Guidelines 2012,1 which were based on paediatric data from a prospective cohort study.22 (LOE IV GOR D)

    Loading dose is safer to be infused over 30 minutes in neonates. (ANMF haematology expert group opinion)

    Initial maintenance dose is easier to be administered at 30 units/kg/hr, rather than 28 units/kg/hr. (ANMF haematology expert group opinion)



    Central vascular catheters

    Heparin infusions at 0.5 units/kg per hour are recommended to maintain CVAD patency.1,7 (LOE I, GOR B)



    Peripheral arterial catheters

    Heparin infusions at 0.5 units/mL at 1 mL/hour are recommended.1 (LOE II, GOR B)



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    Neonatal Intensive Care Drug Manual

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