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Find the total volume to administer:

Ordered: NS 21 gtt/min over 8 h via 10 gtt/mL tubing
Answer and Explanation

The Correct Answer is ["1008"]

Calculation:

Given values:

Flow rate = 21 gtt/min

Infusion time = 8 hours

Drop factor = 10 gtt/mL

  • Convert the infusion time from hours to minutes.

Infusion time in minutes = 8 hours × 60 minutes/hour

 = 480 minutes.

  • Calculate the total volume in milliliters (mL).

Total Volume (mL) = (Flow rate (gtt/min) × Time (min)) / Drop factor (gtt/mL)

     = (21 gtt/min × 480 min) / 10 gtt/mL

     = 10080 / 10

     = 1008 mL.


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Related Questions

Correct Answer is D

Explanation

  • Determine the number of tablets per dose.

Ordered dose is 75 mg

Available tablet strength is 25 mg.

Tablets per dose = 75 mg / 25 mg

= 3 tablets.

  • Calculate the total number of tablets per day.

The frequency is "bid," which means twice a day.

Tablets per day = 3 tablets/dose × 2 doses/day

= 6 tablets per day.

  • Calculate the total number of tablets needed for the 4-day supply.

Total tablets = 6 tablets/day × 4 days

= 24 tablets.

Correct Answer is ["6.55"]

Explanation

  • Convert the patient's weight from pounds (lb) to kilograms (kg)

Patient's weight in kg = 54 lb / 2.2 lb/kg

= 24.5454 kg.

  • Calculate the total daily dose in milligrams (mg).

Total daily dose = Ordered dose (mg/kg/day) × Patient's weight (kg)

= 40 mg/kg/day × 24.5454 kg

= 981.816 mg/day.

  • Calculate the dose per administration (since the medication is given "q8h," which is 3 doses/day).

Dose per administration = Total daily dose (mg/day) / 3 doses/day

= 981.816 mg / 3

= 327.272 mg/dose.

  • Determine the concentration of the available medication.

Available is 250 mg in 5 mL.

Concentration = 250 mg / 5 mL

= 50 mg/mL.

  • Calculate the volume in milliliters (mL) to administer per dose.

Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)

= 327.272 mg / 50 mg/mL

= 6.5454 mL/dose.

  • Round the answer to the nearest hundredth.

= 6.55 mL/dose.

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