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Practice Question

A continuous heparin infusion is to begin at 15 units/kg/hr for a client weighing 82 kg. Available: 25,000 units of heparin in 250 mL D5W. Calculate the mL/hr. (the pump is capable of delivering in tenths of an mL).

Answer Choices:

Correct Answer:

12.3 mL/hr

Rationale:

🧮Calculate the total dose by multiplying the ordered rate (15 units/kg/hr) by the client’s weight (82 kg) to get 1230 units/hr.

⚗️Determine the drug concentration by dividing total heparin in solution (25,000 units) by the solution volume (250 mL), yielding 100 units/mL.

💉Apply the infusion rate formula (units/hr ÷ units/mL) to arrive at 12.3 mL/hr.

📊Use the pump’s decimal capability to deliver tenths of a milliliter for precise administration.

📌Core Message

Precise infusion rates are calculated by dividing the ordered units/hr by the solution concentration (units/mL) and using the pump’s decimal precision.

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Lpn pharmacology Exam

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Question Details
  • Category: LPN Nursing Exams
  • Subcategory: ATI Exams (LPN)
  • Domain: PHARMACOLOGY (LPN ati)
  • Answer Choices: 4
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