Practice Quiz

Veterinary Technician

Category - Pharmacology

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Dr. Doberman has ordered a heparin infusion of 1000 units/hour for an 80-pound springer spaniel. The infusion is to be mixed as 25,000 units in 1000 mL .9% NaCl. How many mL per hour would this patient receive?
  1. 25 mL
  2. 40 mL
  3. 4 mL
  4. 200 mL
Explanation
Answer: B - 40 mL per hour is the correct infusion rate for a patient requiring 1000 units/hour of 25,000 units of heparin diluted in 1000 ml of fluids. The ordered dosage (1000 units/hour) is divided by the strength of the drug (25,000 units), which equals 0.04. This amount is then multiplied by the total volume of liquid to be infused (1000 ml) for an hourly administration rate of 40 mL / hr.
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