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A continuous heparin infusion is to begin at 15 units/kg/hr for a client weighing 82 kg. Available: 25,000 units of heparin in 250 mL D5W. Calculate the mL/hr. (the pump is capable of delivering in tenths of an mL).

A.

12.3 mL/hr

B.

123 mL/hr

C.

125 mL/hr

D.

12 mL/hr

Answer and Explanation

The Correct Answer is A

Given:

Ordered dose of Heparin: 15 units/kg/hr

Patient weight: 82 kg

Total Heparin in solution: 25,000 units

Volume of solution: 250 mL

 

Step 1: Calculate the total dose of Heparin in units/hr:

Total dose (units/hr) = Ordered dose (units/kg/hr) x Patient weight (kg)

Total dose (units/hr) = 15 units/kg/hr x 82 kg

Total dose (units/hr) = 1230 units/hr

 

Step 2: Calculate the concentration of Heparin in the solution:

Concentration (units/mL) = Total Heparin (units) / Volume of solution (mL)

Concentration (units/mL) = 25,000 units / 250 mL

Concentration (units/mL) = 100 units/mL

 

Step 3: Calculate the infusion rate in mL/hr:

Infusion rate (mL/hr) = Total dose (units/hr) / Concentration (units/mL)

Infusion rate (mL/hr) = 1230 units/hr / 100 units/mL

Infusion rate (mL/hr) = 12.3 mL/hr

 


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Related Questions

Correct Answer is A

Explanation

Given:

Volume of fluid: 3,000 mL

Infusion time: 24 hours

Formula:

Flow rate (mL/hr) = Volume (mL) / Time (hr)

Step 1: Calculate the infusion rate in mL/hr:

Flow rate (mL/hr) = 3,000 mL / 24 hr

Flow rate (mL/hr) = 125 mL/hr

Correct Answer is D

Explanation

Rationale:

Ordered Dose:

The prescription is for 12 mg of Celestone Soluspan (betamethasone) IM every 24 hours for 2 doses.

Available Dose (from label): The vial contains 6 mg/mL.

Dosage Calculation: Using the formula:

Volumetoadminister(mL) = Availableconcentration(mg/mL) / Ordereddose(mg)

Volumetoadminister = 12mg / 6mg/mL = 2 mL

Administration Route:

The order specifies IM (intramuscular) administration, aligning with the label instructions.

Thus, 2 mL IM is the correct dosage to administer.

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