A client receives a prescription for heparin 320 units/hour. The available solution is labeled Heparin Sodium 20,000 Units in 5% Dextrose Injection 500 mL The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only.)
The Correct Answer is ["8"]
Given:
Ordered infusion rate: 320 units/hour
Concentration of Heparin: 20,000 units in 500 mL (40 units/mL)
Formula:
Infusion rate (mL/hr) = Infusion rate (units/hr) / Concentration (units/mL)
Step 1: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = 320 units/hr / 40 units/mL
Infusion rate (mL/hr) = 8 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["33"]
Explanation
Rationale:
Given:
Total dose of Potassium Chloride: 30 mEq
Volume of solution: 100 mL
Infusion rate: 10 mEq/hour
Step 1: Determine the concentration of Potassium Chloride in the solution:
Concentration (mEq/mL) = Total Potassium Chloride (mEq) / Volume of solution (mL)
Concentration (mEq/mL) = 30 mEq / 100 mL
Concentration (mEq/mL) = 0.3 mEq/mL
Step 2: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Infusion rate (mEq/hr) / Concentration (mEq/mL)
Infusion rate (mL/hr) = 10 mEq/hr / 0.3 mEq/mL
Infusion rate (mL/hr) = 33.33 mL/hr
Step 3: Round to the nearest whole number:
Infusion rate (mL/hr) ≈ 33 mL/hr
Correct Answer is ["30"]
Explanation
Given:
Ordered dose of lamivudine: 150 mg twice daily
Concentration of lamivudine solution: 10 mg/mL
Step 1: Calculate the total daily dose of lamivudine:
Total daily dose (mg) = Dose per administration (mg) x Number of administrations per day
Total daily dose (mg) = 150 mg/dose x 2 doses/day
Total daily dose (mg) = 300 mg/day
Step 2: Calculate the volume to be administered per dose:
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
Volume (mL) = 150 mg / 10 mg/mL
Volume (mL) = 15 mL/dose
Step 3: Calculate the total volume to be administered in 24 hours:
Total volume (mL) = Volume per dose (mL) x Number of doses per day
Total volume (mL) = 15 mL/dose x 2 doses/day
Total volume (mL) = 30 mL/day
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