Questions and Answers
What is the rate in mL/hr for an infusion of 1,000 units/hr of heparin from a solution of 1,000 mL 0.45% NS with 25,000 units of heparin?
40 mL/hr
What is the dosage in units/hr when infusing D5 0.9% NS 1,000 mL with 25,000 units of heparin at 35 mL/hr?
875 units/hr
What is the dosage in units/hr for an infusion of D5W 1,000 mL with 25,000 units of heparin at 100 mL/hr?
25,000 units/hr
Study Notes
Weight-based Heparin Protocol Calculations
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Infusion Rate Calculation: For an order to infuse 1,000 units/hr of heparin from a solution of 1,000 mL 0.45% NS with 25,000 units of heparin, utilize the formula D/H * Q = x.
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Example Calculation:
- D = 1,000 units (desired dosage)
- H = 25,000 units (available dosage)
- Q = 100 mL (total volume)
- Calculation: 1,000/25,000 * 100 = 40 mL/hr.
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Dosage Calculation at a Specific Rate: When infusing D5 0.9% NS 1,000 mL with 25,000 units of heparin at a rate of 35 mL/hr, use H/D * Q = x.
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Example Calculation:
- H = 25,000 units
- D = 1,000 mL (total volume)
- Q = 35 mL/hr.
- Calculation: 35/1,000 * 25,000 = 875 units/hr.
Additional Dosage Calculation Scenarios
- High Rate Infusion: For infusing D5W 1,000 mL with 25,000 units of heparin at 100 mL/hr, again apply D/H * Q = x.
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Example Calculation:
- H = 25,000 units
- D = 1,000 mL
- Q = 100 mL/hr.
- Calculation: 1,000 mL/25,000 * 100 = 25,000 units/hr.
General Formula Reference
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Key Formulas:
- D/H * Q = x (for finding the infusion rate)
- H/D * Q = x (for calculating the dosage in units/hr)
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Description
Test your knowledge on weight-based heparin protocols with these flashcards. Each card presents a scenario requiring you to calculate dosages or infusion rates using fundamental calculations. Perfect for healthcare professionals or students preparing for pharmacology exams.
