ATI N300 Dosage Calculation Proctored Exam
Calculation
A client is receive a continuous Heparin infusion at 950 units per hour. Pharmacy supplies Heparin in a concentration of 25.000 units per 250mL of IV fluid. Calculate the rate at which the nurse should set the IV pump. (Use a preceding zero if it applies. Do not use trailing zeros. Round to the nearest tenth).
mL/hr
Explanation & Rationale
Identify the Desired Dose: The client needs 950 units of Heparin per hour. Identify the Available Concentration: The pharmacy provides Heparin at a concentration of 25,000 units in 250 mL of IV fluid. Set up the Proportion: (Desired Dose / Available Concentration) = (Rate (mL/hr) / Volume (mL)) (950 units / 25,000 units) = (X mL / 250 mL) Solve for X (the Rate): Cross-multiply: 950 units x 250 mL = 25,000 units x X mL 237,500 = 25,000X X = 237,500 / 25,000 X = 9.5 mL/hr
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