University of South Alabama
College of Nursing
HSC 342
Math Review 2
1.
The physician has ordered 120 mg of acetaminophen (Tylenol) po prn fever
greater than 101.5oF. The drug is supplied as 30 mg per milliliter. How many
mL will you give?
2.
Mr. Jackson has been prescribed 120 mg of Garamycin (Gentamycin sulfate)
to be mixed into a 500 mL bag of D5W. You have a 20-ml multidose vial
with 40 mg/mL. How many milliliters will you draw up into a syringe to mix
in the IV bag?
3.
The recommended dose of clindamycin is 25 mg/kg/day. The child weighs 50
pounds. How many milligrams of clindamycin will the child get every 8
hours? (Round to the nearest whole number.)
4.
Order: 38 units of Humulin N subcutaneous every morning. Available:
Humulin N –100. How many mL will you give? Provide answer to the 100ths
place.
5.
Available: 40 mEq potassium chloride in 1020mL of D5W, infuse at a rate of
1.5 mEq per hour. The infusion set has a drop factor of 10.
a. What will be the hourly rate (mL/h) to the nearest whole number?
b. How many gtts/min should infuse?
6.
The physician has prescribed a continuous IV of heparin 10,000 units in 500
mL of D5W to infuse at a rate of 20 units/kg/hour. The patient weighs 38 kg.
a. How many total units of heparin should the patient receive per hour?
b. What will be the hourly rate (mL/hr) to deliver the ordered dose?
7.
The physician has ordered amiodarone hydrochloride (Cordarone Intravenous)
900 mg to be added to 500 mL of D5W and run IV at a rate of 1 mg/min for 6
hours. The manufacturer’s direction agrees with the physician’s order. The
available 3 mL vials of Cordarone Intravenous contain 50 mg per 1 mL. The
infusion set delivers 60 drops per mL.
a. How many mL of Cordarone Intravenous will be added to the D5W?
b. How many mL/ minute must infuse to deliver the prescribed amount?
(Round to the nearest hundredth.)
c. How many mL/hr should the electronic infusion device be set to deliver?
(Round to the nearest 100th)
8.
Physician’s order: Dobutamine (Dobutrex) 500 mg in 500 mL of D5W, 6
mcg/kg/min IVPB. Weight 145 lb.
a. What is the flow rate on the infusion pump in mL/hr? (Give whole number
answer.)
b. If the above infusion begins at 0600, when will it be completed (Round
answer to the nearest whole number)?
.
Answers
1. 4
mL 120mg
mL
*
=
dose 30mg dose
2. 3
mL
1mL 120mg
*
=
bag
bag 40mg
3. 189
25mg
1kg
50lbs 1day
mg
=
*
*
*
1
3doses
dose kg / day 2.2lbs
4. 0.38
5a. 38
5b. 6
mL
mL
38units
*
=
dose 100units
dose
mL 1020mL 1.5mEq
=
*
hr
40mEq
hr
gtts 10 gtts 1020mL 1.5mEq
hr
=
*
*
*
= 6.375
mL
hr
min
40mEq
60 min
6a. 760
units 20units 38kg
=
*
hr
kg / hr
1
6b. 38
mL
500mL
20units 38kg
*
=
*
1
hr 10,000units kg / hr
7a. 18
mL
1mL 900mg
=
*
bag
bag 50mg
7b. 0.58
mL 518mL 1mg
=
*
min 900mg min
7c. 34.53
mL 518mL 1mg 60 min
*
=
*
hr 900mg min
hr
8a. 24
mL 500mL
1mg
6mcg
1kg 145lbs 60 min
*
*
*
=
*
*
hr
hr 500mg 1000mcg kg / min 2.2lbs
1
8b..
First, determine how many hours it will take to complete the infusion.
hr
hr
500mL
=
*
1 24mL
1
Next, add the 21 hours to 0600, which gives 0300 the next day
21