MDC3 Practice Test 2026 - Free MDC3 Practice Questions and Study Guide

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A patient weighing 60 kg requires heparin at 18 units/kg/hr. What is the infusion rate (units/hour)?

720 units/hr.

1260 units/hr.

1080 units/hr.

Dosing is based on weight: to get the infusion rate in units per hour, multiply the patient’s weight in kilograms by the dose in units per kilogram per hour. Here, 60 kg × 18 U/kg/hr means 60 times 18, which equals 1080 units per hour. So the infusion rate is 1080 U/hr. If the per-kg rate were different, you’d get different totals (for example, 12 U/kg/hr would be 720 U/hr; 16.5 U/kg/hr would be 990 U/hr; 21 U/kg/hr would be 1260 U/hr).

990 units/hr.

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