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Prescribed is heparin at 21 units/kg/hr by continuous IV for a patient weighing 93 kg. Available is 25,000 units of heparin in 500 mL of D5W. How many mL/hr should you set the infusion pump to?

Answer :

The infusion pump should be set to 39.06 mL/hr for a patient weighing 93 kg.

The question involves calculating the correct infusion rate for a heparin IV drip based on the patient's weight and the concentration of the heparin solution provided. To find the required rate in mL/hr, calculate the total units of heparin needed per hour for the patient using the prescription:

Total units needed per hour: 21 units/kg/hr × 93 kg

= 1953 units/hr.

Then, find out how many units of heparin are in each mL of the solution:

Units per mL of solution: 25,000 units / 500 mL

= 50 units/mL.

Divide the total units needed per hour by the units per mL to find the infusion pump rate in mL/hr.

Infusion pump rate: 1953 units/hr ÷ 50 units/mL

= 39.06 mL/hr.

Therefore, the infusion pump should be set to approximately 39.06 mL/hr to deliver the prescribed dosage of heparin.

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