A primary health care provider prescribes a continuous intravenous heparin infusion for a … — NCLEX-RN

A primary health care provider prescribes a continuous intravenous heparin infusion for a client diagnosed with a deep vein thrombosis. The client's admission weight is $198\text{ lb}$ . The prescribed infusion rate is $15\text{ units/kg/hr}$ , and the medication arrives from the pharmacy as a premixed $500\text{ mL}$ bag containing $25,000\text{ units}$ of heparin. At what rate should the nurse set the infusion pump in $\text{mL/hr}$ ? (Record the answer as a whole number)

Cevap: 27 mL/hr

Cevap

To solve this calculation, first convert pounds to kilograms:

198 \div 2.2 = 90\text{ kg}

. Next, calculate the hourly dose:

15\text{ units} \times 90\text{ kg} = 1350\text{ units/hr}

. Finally, calculate the volume using dimensional analysis or the D/H x V formula:

(1350\text{ units/hr} \div 25,000\text{ units}) \times 500\text{ mL} = 27\text{ mL/hr}

Adım Adım Çözüm

Convert the client's weight from pounds to kilograms.

198\text{ lb} \div 2.2\text{ lb/kg} = 90\text{ kg}

The prescribed heparin rate is weight-based in kilograms, so the client's weight must first be converted into the appropriate unit.

Calculate the hourly dose of heparin required.

15\text{ units/kg/hr} \times 90\text{ kg} = 1350\text{ units/hr}

Multiplying the weight-based prescription by the client's total weight in kilograms yields the total number of units required per hour.

Determine the concentration of the supplied heparin solution.

25,000\text{ units} \div 500\text{ mL} = 50\text{ units/mL}

To find out how many units are in a single milliliter, divide the total units in the bag by the total volume of the bag.

Calculate the required infusion rate in mL/hr.

1350\text{ units/hr} \div 50\text{ units/mL} = 27\text{ mL/hr}

Dividing the required hourly dose by the concentration provides the volume that must be infused per hour to deliver that dose.

Anahtar Kavram

Weight-Based Intravenous Medication Calculations

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Adım Adım Çözüm

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