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Ch. 23 → Heparin CalculationsHigh-alert medicationHeparin doses are expressed in USP unitsBased on kg weightAdministered IV or subcutaneouslyOrdered units/hr or mL/hr (IV = units/hr)oDelivered with infusion pumpHeparin flush dose is usually 10 units/mL and NEVER exceeds 100 units/mLHeparin sodium for injection and heparin lock flush solution can NEVER be used interchangeablyHeparin MUST be double-checked by another nurseObtain independent verification of the dosage to ensure accuracyCalculating Subcutaneous DosagesTuberculin syringe is used with subcutaneous injectionsoCalibrated in tenths and hundredths of a mL)oDosages never rounded to nearest tenthCalculating IV Heparin SolutionsCalculating the rate in units/hr can be done by using ratio and proportion or formulaExample:An IV solution of heparin is ordered for a client. D5W 1,000mL containing 20,000 units of heparin is to infuse at 30mL/hr. Calculate the dosage of heparin the client is to receive per hour.