How it Works
Try Naxlex NCLEX-RN (Free-Trial)

Samantha Hudson a two-year-old child in the ER with parents at the bedside. She came in not feeling well, irritable, crying all night, and not eating or drinking. Orders: Vistaril 15 mg IM q4h, Stat x 1 for nausea.

Available: Vistaril 50 mg/ml

How many mL will you administer to Samantha now?

A.

1 mL

B.

0.5 mL

C.

0.3 mL

D.

0.2 mL

Answer and Explanation

The Correct Answer is C

Given:

Desired dose of Vistaril: 15 mg

Concentration of Vistaril: 50 mg/mL

 

Step 1: Set up the proportion:

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

 

 

Step 2: Substitute the values:

15 mg / Volume = 50 mg/mL

 

Step 3: Solve for the unknown volume:

Volume = 15 mg / 50 mg/mL

 

Step 4: Calculate the volume:

Volume = 0.3 mL


Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Free Nursing Study Resources

Related Questions

Correct Answer is C

Explanation

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

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

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

Register