Neonatal Drug Calculations

Practice Questions

D. Ann Currie ,RN,MSN

Question # 1How many milliliters per kilogram per day is

the neonate receiving, if the neonate is receiving D10W at 7.25 ml/hr for 24 hours and Fat Emulsion 20% solution at 4.5 ml/hr for 20 hours. Neonate weighs 4.7 lbs.

  ml/kg/day 

ml/kg/day1. x x x = = 81.446808

2. x x x == 42.127659

3. 81.446808 +42.127659 123.57446 ans. 123.57

ml/kg/day

Question # 2The infant, who weighs 2,375 grams, is

getting 150 mg/ kg/ day of Ampicillin in 4 equal doses, How many milligrams per dose should be given?

   mg/dose   

mg/dose wt. 2375 grams 2375 grams= 2.375 Kg.

x x == 89.0625

ans. 89.06 mg/dose

Question # 3The infant, who weighs 2,855 grams, will

receive how many micrograms per kilogram per minute when the Dopamine is infusing at 750 mcg/kg/hr

mcg/kg/min  

mcg/kg/min wt. 2855gm2855 grams =2.855 kg.

x = = 12.5

ans. 12.5 mcg/kg/min

Question # 4The neonate, who weighs 3 lbs 10 oz, will

receive how many milligrams per minute of Dopamine when the infant is getting 950 mg/kg/hr.

mg/min 

mg/minWt = 3 lbs. 10 oz.= 3. 625 lbs 10/16= .625

& 3 = 3.625

x x x = 26.089015

ans. 26.09 mg/min

Question # 5The baby, who weighs 1,667 grams, has an IV

of Dopamine 35 milligrams in 100 milliliters and is getting 12.5 mcg/kg/minute. What will the nurse set the IV infusion rate at to delivery 12.5 mcg/kg/min?

ml/hr

ml/hr wt. 1667 gm.Wt 1667 grams =1.667 kg

X X X X = = 3.5721428

ans. 3.57 ml/hr

Question # 6The neonate weighs 1,922 grams. The physician has ordered

Gentamycin 2 mg per kilogram per dose stat and then every 18 hours for 7 days.

 A. What is the total number of doses the neonate will receive in 7

days?   total number of doses in 7 days        B. How many total milligrams will the neonate receive in 7 days? mg in 7 days.

A. total number of doses in 7 daysDoses /TT

wt. 1922 grams = 1.922 kg Stat =1 dose & doses in 7days 7 days = 7 X 24 hrs = 168 hrs. 18hrs per

dose = 9.333 doses

1 & 9 = 10 doses 10 total doses in

7days

÷

B. mg in 7 days=TT.Wt. 1.922 kg 10 doses in 7 days =TT

X X = 38.44

ans. 38.44 mg in 7 days

Question # 7The physician has ordered Dexamethasone 0.65

mg/kg/day with a dose to be given every 6 hours. The infant weighs 3 lbs. 8 oz.

 A. How many milligrams per dose will the infant receive?

mg/dose   B. How many milligrams will the infant receive in

24 hours? mg/24 hrs

A. mg/dose

Wt. 3 lbs. 8 oz. = 3.5 lbs ( 8/16= .5 & 3=3.5)

every 6hrs = 4 doses/day

X X X == 0.2585227= 0.26

ans. 0.26 mg/dose

B. mg/24 hrs

Mg/TT or mg/dayWt.= 3.5 lbs.

X X = = 1.0340909 = 1.03

ans. 1.03mg/day or 24 hrs

Question # 8The baby, who weighs 3222 grams, received

D10W @ 9 ml/hr for 18 hrs and then it was decreased to 7ml/hr for 6 hours. Also the baby received a fat emulsion 20% solution at 2.75 ml/hr for 21 hours. The baby took 28 ml per each feeding for 4 feedings of formula 24 cal/oz and then 32 ml per each feeding for 4 feedings. How many calories did the baby receive in 24 hours?

calories/24 hours  

Calories/24 hours

Wt. 3222 grams =3.222 kg 1 oz.=30 ml.Calories :a. 1 gram glucose=4 calories or 3.4 caloriesb. intralipids 10%= 1.1calories/ 1 ml 20%= 2.2calories/ 1ml c. formula= 24 calories/ oz

IV calories1) cal/day = a. X X X = = 64.8 b. X X X == 16.8

64.8 & 16.8 81.6

Intralipids calories2) cal/day X X = 127.05

Formula CaloriesCal/day3) a. X X X = = 89.6 b. X X X = = 102.4

89.6 & 102.4 192

Calories per day 81.6 127.05& 192 400.65 ans. 400.65 calories per

day or3.4 cal/1 gm glucose 69.36 127.05 & 191.9 388.31 ans. 388.31 calories per

day

Question # 9The infant, who weighs 5 lbs 4 oz, is receiving

D12.5W at 4.5 ml/hr for 24 hours intralipids 20% solution at 3.5 ml/hr for 20 hours, and Similac 20 cal/oz every 3 hours with each feeding being 22 milliliters. Also microlipids 1 ml per 1 oz of formula will be added to formula. How may calories per kilogram per day is the infant receiving?

cal/kg/day 

Calories /kg/dayWt. 5lbs 4oz = 5. 25 lbs ( 4/16=.25 &

5=5.25)Calories: IV 1gram of glucose = 4 calories or 3.4

calories intralipids 20%= 2.2calories/ 1 ml formula= 20calories/1 oz microlipids= 4.5calories/ 1ml

IV CaloriesCal/kg/day

X X X XX == 22.628571

Intralipids CaloriesCal/kg/day

X X X XX= 64.533333

Formula CaloriesCal/kg/day

X X X X== 49.168253

Microlipids CaloriesCal/kg/day

X X X XX X = =11.062857

Calories/kg/day 22.628571 64.533333 49.168253&11.062857 4cal147.39301 ans. 147.39 cal/kg/day

18.77266264.53333349.16825311.062857 3.4 cal143.53709 ans. 143.54 cal/kg/day

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