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The doctor orders Augmentin 250 mg po q6h. The drug comes in a 2 gram vial. Directions say to reconstitute with 77.2 mL of sterile water to yield a solution of 125 mg/5 mL. How many mL will you administer to the client for the correct dose?

A.

2 mL

B.

8 mL

C.

10mL

D.

15 mL

Answer and Explanation

The Correct Answer is C

Given:

Ordered dose of Augmentin: 250 mg

Drug comes in a 2 gram vial

Reconstituted volume: 77.2 mL

Concentration after reconstitution: 125 mg/5 mL

 

Step 1: Calculate the total volume of the reconstituted solution:

Total volume = 77.2 mL

 

Step 2: Calculate the total amount of Augmentin in the solution:

Total amount (mg) = Concentration (mg/mL) x Total volume (mL)

Total amount (mg) = 125 mg/5 mL x 77.2 mL

Total amount (mg) = 1930 mg

 

 

Step 3: Determine the number of doses in the vial:

Number of doses = Total amount (mg) / Ordered dose (mg/dose)

Number of doses = 1930 mg / 250 mg/dose

Number of doses = 7.72 doses

 

Step 4: Calculate the volume per dose:

Volume per dose (mL) = Total volume (mL) / Number of doses

Volume per dose (mL) = 77.2 mL / 7.72 doses

Volume per dose (mL) = 10 mL


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Related Questions

Correct Answer is C

Explanation

Given:

Ordered dose of Heparin: 100,000 units

Concentration of Heparin: 25,000 units/10 mL

Step 1: Set up the proportion:

Desired dose (units) / Volume to administer (mL) = Concentration (units/mL)

Step 2: Substitute the values:

100,000 units / Volume = 25,000 units/10 mL

Step 3: Solve for the unknown volume:

Volume = 100,000 units / (25,000 units/10 mL)

Volume = 100,000 units x (10 mL / 25,000 units)

Volume = 40 mL

Correct Answer is A

Explanation

Given:

Volume of fluid: 2500 mL

Infusion time: 8 hours

Drop factor: 15 gtt/mL

Formula:

Flow rate (gtt/min) = (Volume (mL) / Time (hr)) x Drop factor (gtt/mL) / 60 min/hr

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

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

Infusion rate (mL/hr) = 2500 mL / 8 hr

Infusion rate (mL/hr) = 312.5 mL/hr

Step 2: Calculate the flow rate in gtt/min:

Flow rate (gtt/min) = (Infusion rate (mL/hr) x Drop factor (gtt/mL)) / 60 min/hr

Flow rate (gtt/min) = (312.5 mL/hr x 15 gtt/mL) / 60 min/hr

Flow rate (gtt/min) = 4687.5 gtt/hr / 60 min/hr

Flow rate (gtt/min) = 78.125 gtt/min

Step 3: Round to the nearest whole number:

Flow rate (gtt/min) ≈ 78 gtt/min

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