Hesi RN dosage calculation d441
Question 1:
A client is receiving a secondary infusion of vancomycin 1,500 mg in 250 ml to be
infused over two hours. The intravenous (IV) administration set delivers 15 gtt/ml. How
many gtt/min should the nurse regulate the infusion? (Enter numerical value only. If
sounding is required, round to the nearest whole number.)
Explanation
Correct Answer (gtt/min) : 31
Solution
Given Information:
Vancomycin dose: 1,500 mg
Volume: 250 mL
Infusion time: 2 hours
Drop factor: 15 gtt/mL
Calculate the total infusion time in minutes
2 hours x 60 min/hour = 120 minutes
Calculate the total volume to be infused
250 mL
Calculate the infusion rate in mL/min
Infusion rate = Total volume / Infusion time
Infusion rate = 250 mL / 120 min = 2.08 mL/min
,Calculate the gtt/min
gtt/min = Infusion rate (mL/min) x Drop factor (gtt/mL)
gtt/min = 2.08 mL/min x 15 gtt/mL = 31.2 gtt/min
Round to the nearest whole number (as instructed)
gtt/min = 31 gtt/min
Question 2:
A client with deep vein thrombosis (DVT) is receiving a continuous IV infusion of heparin
sodium 20,000 units in 5% dextrose Injection 500 ml at the rate of 25 mL/hour. How many
units of heparin should the client receive in 12 hours? (Enter numeric value only.)
Explanation
Correct Answer (units) : 12000
Solution
Given Information:
Heparin dose: 20,000 units
Volume: 500 mL
Infusion rate: 25 mL/hour
Time: 12 hours
Calculate the total volume infused in 12 hours
Total volume = Infusion rate x Time
Total volume = 25 mL/hour x 12 hours = 300 mL
Calculate the proportion of heparin infused in 12 hours
Proportion = Total volume infused / Total volume
,Proportion = 300 mL / 500 mL = 0.6
Calculate the units of heparin infused in 12 hours
Units of heparin = Total heparin units x Proportion
Units of heparin = 20,000 units x 0.6 = 12,000 units
Question 3:
The healthcare provider prescribes interferon bela-1b 0.0625 mg SUBO every other day
for a client with multiple sclerosis. The nurse reconstitutes the single-use vial of powder
labeled, "0.3 mg with 2 mL of sterile water. How many mil should the nurse administer to
the client? (Enter the numerical value only. If rounding is required, sound to the nearest
hundredth.)
planation
Correct Answer (mL) : 0.25
Solution
Given Information:
Prescribed dose: 0.0625 mg
Powder in vial: 0.3 mg
Volume of diluent: 1.2 mL
Calculate the concentration of the reconstituted solution
Concentration = Powder in vial / Volume of diluent
Concentration = 0.3 mg / 1.2 mL = 0.25 mg/mL
Calculate the volume of the reconstituted solution to be administered
Volume to be administered = Prescribed dose / Concentration
, Volume to be administered = 0.0625 mg / 0.25 mg/mL = 0.25 mL
Question 4:
The healthcare provider prescribes a liter of normal saline IV to be infused over 9 hours
for a client who is NPO. The nurse should program the infusion pump to deliver how
many mL/hour? (Enter numeric value only. If rounding is required, round to the nearest
whole number).
Explanation
Correct Answer (mL/hour) : 111
Solution
Given Information:
Volume: 1 liter
Time: 9 hours
Convert liters to milliliters
1 liter = 1000 mL
Calculate the infusion rate
Infusion rate = Volume / Time
Infusion rate = 1000 mL / 9 hours = 111.11 mL/hour
Round to the nearest whole number (as instructed)
Infusion rate = 111 mL/hour
Question 5:
Question 1:
A client is receiving a secondary infusion of vancomycin 1,500 mg in 250 ml to be
infused over two hours. The intravenous (IV) administration set delivers 15 gtt/ml. How
many gtt/min should the nurse regulate the infusion? (Enter numerical value only. If
sounding is required, round to the nearest whole number.)
Explanation
Correct Answer (gtt/min) : 31
Solution
Given Information:
Vancomycin dose: 1,500 mg
Volume: 250 mL
Infusion time: 2 hours
Drop factor: 15 gtt/mL
Calculate the total infusion time in minutes
2 hours x 60 min/hour = 120 minutes
Calculate the total volume to be infused
250 mL
Calculate the infusion rate in mL/min
Infusion rate = Total volume / Infusion time
Infusion rate = 250 mL / 120 min = 2.08 mL/min
,Calculate the gtt/min
gtt/min = Infusion rate (mL/min) x Drop factor (gtt/mL)
gtt/min = 2.08 mL/min x 15 gtt/mL = 31.2 gtt/min
Round to the nearest whole number (as instructed)
gtt/min = 31 gtt/min
Question 2:
A client with deep vein thrombosis (DVT) is receiving a continuous IV infusion of heparin
sodium 20,000 units in 5% dextrose Injection 500 ml at the rate of 25 mL/hour. How many
units of heparin should the client receive in 12 hours? (Enter numeric value only.)
Explanation
Correct Answer (units) : 12000
Solution
Given Information:
Heparin dose: 20,000 units
Volume: 500 mL
Infusion rate: 25 mL/hour
Time: 12 hours
Calculate the total volume infused in 12 hours
Total volume = Infusion rate x Time
Total volume = 25 mL/hour x 12 hours = 300 mL
Calculate the proportion of heparin infused in 12 hours
Proportion = Total volume infused / Total volume
,Proportion = 300 mL / 500 mL = 0.6
Calculate the units of heparin infused in 12 hours
Units of heparin = Total heparin units x Proportion
Units of heparin = 20,000 units x 0.6 = 12,000 units
Question 3:
The healthcare provider prescribes interferon bela-1b 0.0625 mg SUBO every other day
for a client with multiple sclerosis. The nurse reconstitutes the single-use vial of powder
labeled, "0.3 mg with 2 mL of sterile water. How many mil should the nurse administer to
the client? (Enter the numerical value only. If rounding is required, sound to the nearest
hundredth.)
planation
Correct Answer (mL) : 0.25
Solution
Given Information:
Prescribed dose: 0.0625 mg
Powder in vial: 0.3 mg
Volume of diluent: 1.2 mL
Calculate the concentration of the reconstituted solution
Concentration = Powder in vial / Volume of diluent
Concentration = 0.3 mg / 1.2 mL = 0.25 mg/mL
Calculate the volume of the reconstituted solution to be administered
Volume to be administered = Prescribed dose / Concentration
, Volume to be administered = 0.0625 mg / 0.25 mg/mL = 0.25 mL
Question 4:
The healthcare provider prescribes a liter of normal saline IV to be infused over 9 hours
for a client who is NPO. The nurse should program the infusion pump to deliver how
many mL/hour? (Enter numeric value only. If rounding is required, round to the nearest
whole number).
Explanation
Correct Answer (mL/hour) : 111
Solution
Given Information:
Volume: 1 liter
Time: 9 hours
Convert liters to milliliters
1 liter = 1000 mL
Calculate the infusion rate
Infusion rate = Volume / Time
Infusion rate = 1000 mL / 9 hours = 111.11 mL/hour
Round to the nearest whole number (as instructed)
Infusion rate = 111 mL/hour
Question 5:
