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A doctor orders 12 mg/kg of Acyclovir, the patient weighs 115 lbs. Acyclovir is supplied as 100 mg/2mL. How many mL will you administer per dose?

A.

12.5 mL/dose

B.

12 mg/dose

C.

12.5 mL/hr

D.

12 mL/dose

Answer and Explanation

The Correct Answer is D

Given:
Ordered dose of Acyclovir: 12 mg/kg
Patient weight: 115 lbs
Concentration of Acyclovir: 100 mg/2 mL

Step 1: Convert patient weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Patient weight in kg = 115 lbs * 0.453592 kg/lb = 52.16308 kg

Step 2: Calculate the total dose of Acyclovir:
Total dose (mg) = Ordered dose (mg/kg) x Patient weight (kg)
Total dose (mg) = 12 mg/kg x 52.16308 kg = 625.95696 mg

Step 3: Calculate the volume to be administered:
Volume (mL) = Total dose (mg) / Concentration (mg/mL)
Volume (mL) = 625.95696 mg / 100 mg/2 mL
Volume (mL) = 625.95696 mg x (2 mL / 100 mg)
Volume (mL) = 12.5191392 mL

Step 4: Round to the nearest tenth:
Volume (mL) ≈ 12.5 mL/dose
 


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Related Questions

Correct Answer is D

Explanation

Given:

Ordered dose of antibiotic: 250 mg

Vial contains: 250 mg of antibiotic

Reconstitution volume: 1.7 mL of sterile water

Final volume after reconstitution: 2 mL

Step 1: Determine the concentration of the reconstituted solution:

Concentration (mg/mL) = Total amount of drug (mg) / Total volume (mL)

Concentration (mg/mL) = 250 mg / 2 mL

Concentration (mg/mL) = 125 mg/mL

Step 2: Calculate the volume to be administered:

Volume (mL) = Ordered dose (mg) / Concentration (mg/mL)

Volume (mL) = 250 mg / 125 mg/mL

Volume (mL) = 2 mL

Correct Answer is C

Explanation

Given:
Volume of fluid: 50 mL (DSW)
Infusion time: 30 minutes

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

Step 1: Convert infusion time to hours:
Infusion time (hr) = 30 min / 60 min/hr
Infusion time (hr) = 0.5 hr

Step 2: Calculate the infusion rate in mL/hr:
Flow rate (mL/hr) = Volume (mL) / Infusion time (hr)
Flow rate (mL/hr) = 50 mL / 0.5 hr
Flow rate (mL/hr) = 100 mL/hr

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