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Difficulty: MediumPharmacological Therapies

During a shift, a practical nurse reviews the medication administration record for a client being treated for a pulmonary embolism. The client weighs 165 lb165\text{ lb}. The provider has prescribed a subcutaneous injection of enoxaparin sodium at 1 mg/kg1\text{ mg/kg} every 12 hours12\text{ hours}. The medication is supplied in a prefilled syringe containing 100 mg/1 mL100\text{ mg}/1\text{ mL}. How many mL\text{mL} should the nurse administer? Record your answer to the nearest hundredth. Do not include units in your answer.

Answer: 0.75 mL

Answer

0.75
To determine the correct volume to administer, first convert the client's weight to kilograms (165÷2.2=75 kg165 \div 2.2 = 75\text{ kg}). Next, determine the total dose required by multiplying the weight by the prescribed rate (75×1=75 mg75 \times 1 = 75\text{ mg}). Finally, divide the required dose by the available concentration to find the volume in milliliters (75÷100=0.75 mL75 \div 100 = 0.75\text{ mL}).

Step-by-Step Solution

1
Convert the client's weight to kilograms
75 kg75\text{ kg}
The prescription is weight-based in kilograms, so the pounds must be converted (165÷2.2=75165 \div 2.2 = 75).
2
Calculate the required medication dose
75 mg75\text{ mg}
Multiply the client's weight in kilograms by the prescribed dosage rate (75×1=7575 \times 1 = 75).
3
Calculate the volume to administer
0.75 mL0.75\text{ mL}
Divide the desired dose by the available concentration to find the required liquid volume (75÷100×1=0.7575 \div 100 \times 1 = 0.75).

Key Concept

Weight-based medication dosage and volume calculation
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Topics

Pharmacological Therapies

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