Download Drug_Calc_Study_Guide_Part_II_rev0403adobe

HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
IV Calculations
I.
Calculating IV Flow Rates
A.
Using the IV formula (gravity, no pump in use)
Amount in cc X gtt factor*
time in minutes
=
rate (gtts per minute)
1000 cc to be given over 8 hours. Set delivers 15 gtts/cc. What is the rate?
Example:
1000 x 15
480
=
15000
480
=
31.25
=
31 gtts/min
* Gtt factor (the number of drops per cc (gtts/cc)) is normally found on the IV tubing package. For the sake
of drug calculation problems in this module and on tests, the gtt factor will be given in the problem.
B.
IV Pump
1.
When the IV is controlled by a pump, the pump is set for ml per hour. To find the proper setting,
divide the amount of fluid by the number of hours; or work it out by ratio and proportion.
Example: 1000 ml in 8 hours. What setting do you place on the pump?
1000 ml = 125 ml/hr or 1000 ml : 8 hours = x ml : 1 hr
8 hours
1000 = 8X
25 ml = X
2.
When administering piggyback with the IV on a pump, you will need to adjust the rate to give the
medication in the desired time.
Example: You wish to administer 150 cc IVPB in 45 minutes. What rate would you set the pump
on?
150 cc : 45 min = X cc : 60 min
45 X = 9000
X = 200 ml/hr
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 48
3.
When a medication is being titrated at a specific dosage per minute, you must first change grams
to milligrams and second, calculate the rate when given either on a pump or using a set with a
drop factor of 60.
Example:
Ordered: Lidocaine 3 mg/min IV
On hand: Lidocaine 1 g in 500 ml D5NS
1000 mg: 500 ml = 3 mg : X ml
1000 x = 1500
x = 1.5 ml (contains 3 mg)
On Pump
1.5 ml : 1 min = x ml : 60 min
x = 90 ml/hr
Gravity Flow
(gtt factor - 60)
1.5 ml x 60 gtts / ml =
1 min
4.
Note:
do not round off your answer
at this point.
90 gtts/min
Caloric Value Calculation of IV Fluid
A.
% - grams of CHO/100 cc
B.
CHO = 4 calories per gram
PRO = 4 calories per gram
FAT = 9 calories per gram
Example:
1000 cc D5W = ? calories
5% = 5 gms of CHO/100 cc
5 g x 4 calories = 20 calories per 100 cc
20 : 100 = X : 1000
X = 200 calories
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 49
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
Calculating IV Push Medications
1.
Determine the safe rate of administration for the drug ordered. (This info is found in your IV Medications
Reference Book, Gahart, Betty L. (Intravenous Medications; Mosby.)
Ordered:
2.
Famotidine 20mg IVP now.
According to the IV reference, the safe rate of administration is 20mg over 2 minutes.
Determine if the medication should be diluted and appropriate solution.
According to the IV reference, the Famotidine 20mg must be diluted with 5-10ml of NS.
3.
Determine the total amount of fluid that contains the ordered dose of medication.
Famotidine 20mg is supplied in a vial containing 20mg per ml.
Famotidine 20mg = 1ml
4.
dilution 5-10ml
= 9ml*
total
=10ml
* I chose 9ml so that when added to the 1 ml of
famotidine the total is 10ml which is an easy
number to work with. I could have used any
amount of dilution between 5-10 ml.
Calculate the amount of solution over the time indicated in the safe rate.
10 ml : 2 min = Xml : 1 min
2X = 10
X = 5 ml/min
5.
Break down the safe rate into 15 seconds to make it easier to control when administered.
Safe rate = 5 ml : 1 min
5ml : 60 seconds = X ml : 15 seconds
60X = 75
X = 1.25 cc per 15 seconds
OR
5 ml : 1 min
2.5 ml : 30 seconds
1.25 ml : 15 seconds
EXAMPLE:
Ordered:
Digoxin 0.25mg IVP
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 50
(undiluted)
On hand:
Digoxin 0.25mg per 2ml
Safe Rate:
Each dose must be given over 5 minutes
How many ml will you administer over a 15 second period?
2 ml : 5 minutes = X ml : 1 min
(Total amount solution) (Safe rate)
5X = 2
X = .4 ml per minute
.4 ml : 60 sec = X : 15 sec
60 X = 6
X = .1 ml per 15 seconds
EXAMPLE:
Ordered:
Lorazepam 2mg IVP
(diluted)
Available:
Lorazepam 2mg per ml
Dilute with an equal amount of normal saline
Safe Rate:
Administer the dose over 2 minutes
*2 ml : 2 minutes = X ml : 1 min
*(total amount of solution)
2 mg lorazepam = 1 ml
equal amount NS = 1 ml
2 ml
2X=2
X = 1 ml/minute
1 ml : 60 sec = X ml : 15 secs
60 X = 15
X = .25 ml/15 secs
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 51
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
IV Practice Problems
1.
At what rate would you set the IV pump if the IVPB medication is mixed in 100 cc fluid and is to be
administered in 30 minutes?
2.
At what rate would you set the IV pump if you have 150 cc IVPB fluid to be run in 40 minutes?
3.
At what rate would you administer 1000 cc fluid to infuse in 12 hours using a set that delivers 15 gtt/cc?
4.
If a patient is to receive 3000 cc IV fluid in 24 hours, at what rate would you set the IV pump (ml/hr)?
5.
At what rate would you set the IV pump to administer 1 ml per minute?
6.
To administer 500 ml of IV fluid in 5 hours you would set the IV pump at _____________- ml/hr.
7.
At what rate would you set the IV pump to infuse 150 ml in 45 minutes?
Practice caloric value calculation problems
8.
1000 cc D50W = ______________ calories
9.
500 cc D5W = ________________ calories
IVP Calculations
10.
Ordered:
Supplied:
Safe Rate:
Pepcid 20 mg IVP
Pepcid 20 mg in 2 cc. Directions tell you to dilute with 8 cc NS prior to administering.
Administer over 2 minutes
Calculate how many ml will you push over a 15 second period.
11.
Ordered:
Supplied:
Safe Rate:
Solu-Medrol 125 mg IVP
Solu-Medrol 500 mg in 8 cc
Administer over 2 minutes undiluted
Determine how many ml/15 sec will you administer?
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 52
12.
At what rate would you set the IV pump if the IVPB medication is mixed in 100 cc fluid and is to be
administered in 20 minutes?
13.
At what rate would you set the IV pump if you have 200cc IVPB fluid to be run in 60 minutes?
14.
At what rate would you administer 1000 cc to infuse in 8 hours using a set that delivers 15 gtt/cc?
15.
If a patient is to receive 2000 cc IV fluid to infuse in 24 hours, at what rate would you set the IV pump
(ml/hr)?
16.
At what rate would you set the IV pump to administer 2 ml per minute?
17.
To administer 1000 ml of IV fluid in 8 hours you would set the IV pump at ______________ ml hr.
18.
At what rate would you set the IV pump to infuse 150 ml in 2 hours?
19.
At what rate would you administer 100cc to infuse in 1 hour using a set that delivers 15 gtt./cc?
Practice Titration Problems
Calculate the rate on a pump and for infusion set.
20.
Ordered:
On hand:
Lidocaine 4 mg / min IV
Lidocaine 2 Gms in 250 D5W
21.
Ordered:
On hand:
1 mg/min IV
1 g in 1000 cc D5W
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 53
K ey - IV Practice Problems
1.
200 cc/hr
2.
225 cc/hr
3.
21 gtts/min
4.
125 cc/hr
5.
60 cc/hr
6.
100 cc/hr
7.
200 cc/hr
8.
2000 cal
9.
100 cal
10.
1.25 ml/15 sec
11.
0.25 ml/15 sec
12.
300 cc/hr
13.
200 cc/hr
14.
31 gtt/min
15.
83 cc/hr
16.
120 cc/hr
17.
125 cc/hr
18.
75 cc/hr
19.
25 gtt/min
20.
30 cc/hr, 30 gtts/min
21.
60 cc/hr, 60 gtts/min
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 54
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
Review Test - IV Calculations
1. The doctor ordered 3000 ml to be given in 24 hours. The drop factor is 15. How many gtts/min?
Answer___________
2. At what rate (gtts/min) would you administer IV fluid to give:
a) 125 cc/hr (gtt factor = 15)
Answer___________
b) 125 cc/hr
Answer___________
(gtt factor = 10)
3. At what rate would you set the IV pump to deliver:
a) 1000 ml in 8 hours
Answer___________
b) 1500 ml in 8 hours
Answer___________
c) 2000 ml in 10 hours
Answer___________
4. At what rate would you set the IV pump to administer an IVPB medicine of:
a) 100 ml in 45 min
Answer___________
b) 50 ml in 60 min
Answer___________
c) 150 ml in 2 hours
Answer___________
d) 50 ml in 20 min
Answer___________
e) 75 ml in 45 min
Answer___________
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 55
5. Your patient has an order for a medication at 4 mg/min via IV. The solution is prepared with 1 gm of med in
500 cc D5W. At what rate would you set the pump?
Answer___________
6. Your patient is to receive Bretylium at 1 mg/min via IV. The solution is prepared with 500 mg/250 D5W. At
what rate would you set the pump?
Answer___________
7. Your patient is to receive a medication at 2 mg/min via IV. The solution is prepared with 500 mg/250 cc D5W.
At what rate would you set the pump?
Answer___________
8. Your patient is to receive a medication at 10 mg/min via IV. The solution is prepared with 1000 mg/250 cc
D5W. At what rate would you set the pump?
Answer___________
9. Your patient is receiving 3000 cc D5W over 24 hours. How many calories will your patient receive in 8 hours?
Answer___________
10. 1000 cc D10W = ______________________ calories.
Answer___________
11. Ordered: Digoxin .25 mg IVP q AM. Digoxin .25 mg comes in 5 cc. The safe rate of administration is .25 mg/ 5
min. How many cc’s of Digoxin will you push over 15 seconds?
Answer___________
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 56
K ey - Review Test - IV Calculations
1.
31 gtts/min
2.
a) 31 gtts/min
b) 21 gtts/min
3.
a) 125 cc/hr
b) 188 cc/hr
c) 200 cc/hr
4
a) 133 cc/hr
b) 50 cc/hr
c) 75 cc/hr
d) 150 cc/hr
e) 100 cc/hr
Note:
5.
120 cc/hr
6.
30 cc/hr
7.
60 cc/hr
8.
150 cc/hr
9.
200 cal
10.
400 cal
11.
.25 cc in 15 sec.
All answers must be labeled or the problem will be counted wrong.
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 57
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
Pediatric Dosage Calculations
Calculation Methods
1. CLARK’S RULE:
WEIGHT OF CHILD IN POUNDS
150
X
AVERAGE ADULT DOSE = CHILD’S DOSE
Example: Calculate the dose of Tylenol for a child weighting 33 lbs. Average adult dose is gr 10.
33 lb
150
x
gr 10
(average adult dose) = 33
150
x
10 = 330
150
=
2.2 gr
2. Mg/Kg BODY WEIGHT:
The recommended dose of many pediatric drugs is frequently indicated as the amount of the drug to be
administered for each kilogram of body weight. When the weight is known in pounds, you will need to
convert to kilograms.
*
Remember:
2.2 pounds = 1 kilogram
Example: Calculate the correct dose of dramamine for a child weighing 102 lbs. Recommended: 1.25 mg/
kg every 6 hours.
1.
102 lbs ÷ 2.2 =
46.4 kg
2.
1.25 x 46.4 kg = 58 mg Dramamine to be given every 6 hours
3. IV CALCULATIONS:
1. Amount in cc x gtt factor
Time in minutes
=
rate (gtts per min)
* gtt factor for buretrol - 60 gtts/ml
Example: 45 ml to be given over 30 min. What is the rate?
45 x 60
30
=
90 gtts/min
Pediatric IV Medications are Mixed in the Buretrol
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 58
4. SAMPLE PEDIATRIC IV CALCULATIONS:
Ordered: Ampicillin 1500 mg IVPB q 6 hours
Child’s Weight:
22 kg
Recommended dilution: 30 mg/ml to infuse over 30 minutes
Recommended dosage: 300 mg/kg/day
A. Calculate safe dosage
300 mg : 1 kg = X mg : 22 kg
x
=
6600 mg/24 hours
6600 ÷ 4 = 1650 mg/dose
B. Calculate amount of dilution 30 mg : 1 mg = 1500 mg : x ml
30 x = 1500
x = 50 ml
C. Calculate rate
50 ml
30
x
60
=
100 gtts/min
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 59
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
Tips for Administering Pediatric Medications
1.
Dosages will vary. Always calculate to make sure your dosage is safe. Use maximum recommended
dosage to calculate safe dosage. (Ex: 20-30 mg/kg/day; use 30 mg/kg to calculate dosage)
2.
Remember pediatric doses are usually smaller than adult doses. Adolescents often use the adult dose.
3.
Factors related to growth and maturation affect drug responses. Newborns are particularly vulnerable.
4.
Always use ordered dose to calculate the amount of medication you administer.
5.
Always use the five rights to administer medications.
6.
If in doubt of your calculations, refer to the pediatric pharmacists.
7.
When there is only recommended dose, the medication may be given if it is not an overdose.
8
If reference states pediatric dose, then you don't have to calculate the safe dose.
9.
Pediatric dosages of antibiotics should be calculated using the maximum safe dosage of the medication.
Refer to hospital procedures.
10.
Mg/kg dosages are the most frequently used method to calculate pediatric dosages.
11.
For amounts less than 1 ml, calculate to nearest hundredths. For amounts of more than 1 ml, calculate to
nearest tenth.
12.
1000 mcg = 1 mg
13.
1 kg = 2.2 lb = 1000 gm
14.
Calculate pounds and kilograms to nearest tenth.
15.
Calculation of mg dosages: less than 1 mg - calculate to nearest hundredths; more than 1 mg - calculate
to nearest tenth.
16.
For pediatric IV calculations use 60 gtts/ml.
HINDS COMMUNITY COLLEGE
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 60
ASSOCIATE DEGREE NURSING
NURSING 1229
Pediatric Math Practice Problems
1.
2.
3.
Ordered:
Tetracycline 150 mg IM q 8 hrs for a 9 y/o child weighing 60 lbs.
Available preparation:
250 mg/2 ml vial
Recommended dosage for IM:
children over 8 years: 15-25 mg/kg/day
a.
What is the safe dose for this child?
b.
How much will you administer?
Ordered:
Available preparation:
Recommended dosage:
a.
What is the safe dose for this child?
b.
How much will you administer?
Ordered:
Available preparation:
Recommended dosage:
a.
4.
Tylenol liquid 240 mg PO q 4 hr prn temp for a 4 y/o child
160 mg/5 ml oral solution.
4-5 yrs: 240 mg
How many ml will you administer?
Ordered:
Available preparation:
Dosage is safe.
a.
5.
Digoxin 0.2 mg IVP daily. Child's weight: 4.8 kg
0.25 mg/ml
30 to 50 mcg/kg per dose
Lanoxin 0.024 mg PO daily
50 mcg/ml
How much will you give?
Ordered:
Available preparation:
Recommended dosage:
Slo-Phyllin 100 mg PO q 6 hrs for a child weighing 18 lbs
110 mg/5 ml oral elixir
6-15 mg/kg/dose
a.
What is the safe dose for this child?
b.
How much will you administer?
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 61
6.
Ordered:
Available preparation:
Recommended dosage:
a.
7.
8.
10.
How many tablets should you give per dose?
Ordered:
Available preparation:
Child's weight:
Recommended dosage:
Amoxicillin oral suspension 100 mg po q 8 hr
125 mg/5 ml
10 kg
20-40 mg/kg/day in divided doses
a.
What is the safe dose for this child?
b.
How much will you give?
Ordered:
Recommended dosage:
a.
9.
Tylenol 320 mg for a 6 y/o weighing 40 lbs
80 mg chewable tablets
child 6-8 yrs give 320 mg every 4 hrs
Inderal 150 mg daily for a child weighing 96 lbs
po (adults) 240 mg/day
What is the safe dose for this child?
Ordered:
Available preparation:
Recommended dosage:
Penicillin 180,000 U IM for a neonate weighing 7 kg
300,000 U/ml.
neonates: 30,000 U/kg per dose
a.
What is the safe dose for this neonate?
b.
How much will you administer?
Ordered:
Available preparation:
Recommended dosage:
Chloral Hydrate PO 600 mg stat for a child weighing 12 kg
500 mg/5 ml syrup
50 mg/kg/dose
a.
What is the safe dose for this child?
b.
How much will you give?
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 62
11.
Child weighs 20 kg.
Ordered:
Available preparations:
a.
b.
Pre-op: Demerol 40 mg, Phenergan 20 mg, Thorazine 10 mg IM
Demerol 50 mg/ml; Phenergan 50 mg/ml; Thorazine 25 mg/ml
What is the safe dose for each medication?
Recommended dosage:
2.2 mg/kg
Demerol____________________________
Recommended dosage:
1.1 mg/kg
Phenergan__________________________
Recommended dosage:
0.55 mg/kg
Thorazine___________________________
How many ml of each will you mix to administer?
Demerol____________________________________
Phenergan__________________________________
Thorazine___________________________________
Total ml in syringe___________________________
12.
13.
Ordered:
Available preparation:
Recommended dosage:
a.
What is the safe dose for this child?
b.
How many ml will you administer?
Adult dose of Elavil is 50-100 mg at night.
Available preparation:
25 mg tablets. Child weighs 75 lbs.
a.
14.
15.
Rocephin 600 mg IM bid for a child weighing 36 lbs
1 gm vial - reconstituted with 0.9% NS = 500 mg/ml
Children 50-75 mg/kg/day
How many tablets should you give this child?
Ordered:
Available preparation:
Recommended dosage:
Lasix 15 mg PO for a child weighing 16 lbs.
10 mg/ml oral solution
2 mg/kg/dose
a.
What is the safe dose for this child?
b.
How much will you give?
Ordered:
Available preparation:
Recommended dosage:
a.
b.
Phenobarbital 64 mg tid for a child weighing 102 lbs
32 mg tablets
3 to 5 mg/kg/day
What is the safe dose for this child
How many tablets will you give?
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 63
Peds IV Practice Problems
16.
17.
18.
19.
20.
Ordered:
Dilution recommendation:
Recommended dosage:
Child's weight:
Oxacillin 400 mg q 6 hrs IVPB.
Mix 25 mg/ml and give over 30 minutes
200 mg/kg/day
18 lbs
a.
Calculate safe dosage per dose.
b.
Calculate amount of dilution.
c.
Calculate rate.
Ordered:
Recommended dilution:
a.
Calculate amount of dilution.
b.
Calculate rate.
Ordered:
Recommended dilution:
Recommended dosage:
a.
Calculate safe dosage.
b.
Calculate amount of dilution.
c.
Calculate rate.
Ordered:
Recommended dilution:
Recommended dosage:
Child's weight:
Nafcillin 400 mg IVPB.
500 mg/15 ml to infuse over 20 minutes
Vancomycin 120 mg q 6 hrs for a child weighing 28 lbs
5 mg/ml to infuse over 1 hour
40 mg/kg/day
Ampicillin 400 mg IVP q 6 hrs
IVP @ 100 mg/ml/min
300 mg/kg/day
5.6 kg
a.
Calculate safe dose.
b.
Calculate amount of dilution.
c.
Calculate rate (ml over 15 seconds).
Ordered:
Child's weight:
Recommended dilution:
Recommended dosage:
a.
Calculate safe dose.
b.
Calculate amount of dilution.
c.
Calculate rate.
Claforan 1580 mg IVPB q 6 hrs
32 kg
20 mg/ml to infuse over 30 minutes
200 mg/kg/day
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 64
K ey - IV Practice Problems
1. a. 682.5 mg
b. 1.2 ml
12. a. 1230 mg
b. 1.2 ml
2. a. 0.24 mg or 240 mcg
b. 0.8 ml
13. 2 tablets
3. 7.5 ml
14. a. 14.6 mg
b. 1.5 ml
4. 0.48 ml
5. a. 123 mg
b. 4.5 ml
15. a. 232 mg/day; 77.3 mg/dose
b. 2 tablets
6. 4 tablets
7. a. 400 mg
b. 4 ml
8. 153.6 mg
9. a. 210,000 U
b. 0.6 ml
16. a. 1640 mg/day; 410 mg/dose
b. 16 ml
c. 32 gtt s
17. a. 12 ml
b. 36 gtts
18. a. 508 mg/day; 127 mg/dose
b. 24 ml
c. 24 gtts
10. a. 600 mg
b. 6 ml
11. a. Demerol 44 mg
Phenergan 22 mg
Thorazine 11 mg
b. Demerol 0.8 ml
Phenergan 0.4 ml
Thorazine 0.4 ml
Total ml 1.6 ml
19. a. 1680 mg/day; 420 mg/dose
b. 4 ml
c. 4 minutes
20. a. 6400 mg/day; 1600 mg/dose
b. 79 ml
c. 158 gtts
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 65
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
Review Test - Pediatric Calculations
1. The adult dose for a drug is 90 mg. Calculate by Clark’s rule the proper dosage for a child weighing 75
pounds.
Answer:
2. The average adult dose of Penicillin V K is 200,000 units. What is the safe dose for a child who weighs 60
pounds?
Answer:
3. Chloral hydrate PO 25 mg/kg stat for a child weighing 44 lbs. How many mg would you administer?
Answer:
Chloral hydrate is available 250 mg/5 ml. How many ml will you administer?
Answer:
4. Jennifer weighs 25 kg. The doctor orders a drug of 4 mg/kg of body weight. How many milligrams will you
administer?
Answer:
5. The adult dose of Kelfin is 250 mg. What is the dose of Keflin for an infant weighing 60 pounds? Keflin
comes 250 mg/5 ml. How much Keflin would you administer?
Answer:
Answer:
6. David weighs 30 pounds. The maximum adult dose of Benadryl is 100 mg. What is the safe dose of Benadryl
for David? How many milliliters would you administer to David when Benadryl is labeled 10 mg/ml?
Answer:
Answer:
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 66
7. An infant weighing 3000 grams has an order for Ampicillin 200 mg I.M. q 8 hrs. The safe pediatric dosage is
200 mg/kg in divided doses for 24 hours. Calculate the safe dosage for the infant for 24 hours. Ampicillin is
labeled 250 mg/1 ml. How many milliliters will you administer q 8 hrs to give the safe dose?
Answer:
Answer:
8. Ordered is Digoxin 0.42 mg I.V. The safe loading pediatric dose for infants to 2 years is 0.03 to 0.05 mg/kg q
24 hrs. The baby weighs 24 lbs. On hand is a vial of 0.5 mg/ml. Calculate the safe dose. How much will you
give?
Answer:
Answer:
9. Demerol 22 mg I.M. is ordered for child weighing 28 lbs. The safe range is 1-2 mg/kg. Demerol on hand is 25
mg/ml. Calculate the safe dose. How much Demerol will you give?
Answer:
Answer:
10. You are to administer 800 cc of D5 1/4 NS via IV infusion over a 24 hr period. The microdrip infusion set has a
gtt factor of 60 gtts/ml. At what rate (gtts/min) would you infuse the solution?
Answer:
11. Cefotaxime 700 mg IVPB is ordered for a child with encephalitis. The drug is to be mixed at a concentration
of 20 mg/ml and infused over a 30 minute period. How much solution should you use to administer this
piggyback? At what rate would you administer this infusion using a microdrip (60 gtts/ml) in order to
complete it within 30 minutes?
Answer:
Answer:
12. Ampicillin 450 mg q 6 hrs is ordered for a child weighing 6 kg. Safe dosage is 300 mg/kg q 6 hrs IV push at
100 mg/ml/min. Calculate the safe dose. How many mls of Ampicillin will you push? At what rate will you
push?
Answer:
Answer:
Answer:
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 67
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
Review Test - Pediatric Calculations
1. 45 mg
2. 80,000 units
3. 500 mg
10 ml
4. 100 mg
5. 100 mg
2 ml
6. 20 mg
2 ml
7. 600 mg
0.8 ml
8. 0.55 mg
0.84 ml
9. 25.4 mg
0.88 ml
10. 33 - 34 gtts/min
11. 35 ml
70 gtts/min
12. 1800 mg
4.5 ml
4.5 min
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 68
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
Comprehensive Test #1
DIRECTIONS
1.
2.
3.
4.
5.
6.
This test consists of 10 items, each valued at 10 points.
You will have one (1) hour to complete the test.
A grade of at least 90% is required.
You must show your work and label your answers.
You must transfer your answers to the attached answer sheet.
Answers must be correctly labeled to be correct.
1. The order is for Levothroid 0.2 mg daily. The drug is available in 100 mcg scored tablets. How many tablets
will you give?
2. The Doctor orders Codeine sulfate gr ss po q 4 hr prn pain. The pharmacy sends up Codeine sulfate 0.015
Gm scored tablets. How many tablets will you administer?
3. The order is for Keflex suspension 200 mg po qid. The Keflex suspension on hand is 125 mg per 5 ml. How
many drams will you give?
4. Ordered: Heparin 4000 u, SC. The Heparin is supplied in a multi-dose vial that provides 10,000 units per ml.
How many milliliters of Heparin would you give?
5.
Order: cephapirin (Cefadyl) 250 mg im q 6 hr. The drug label reads to add 2 ml of sterile or bacteriostatic
water. Each 1.2 ml contains 500 mg of cephapirin. How many ml will you give?
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 69
6. Order: 1000 ml of 5% D/0.2% NaCl with 10 mEq of KCl for 10 hours. The IV set delivers 20 gtts/ml. How many
drops per minute should the patient receive?
7. The order reads: Ampicillin 1 Gm IVPB q 8 hr. Mix in 50 ml NS. Infuse over 30 minutes. What rate would you
set on the IV pump?
8. Your patient has an order for Lasix 40 mg IVP. Lasix 40 mg comes in 4 cc. The safe rate of administration of
Lasix is 20 mg/min. How many ml of Lasix will you push over a 15 second interval?
9. The dosage of Digoxin is 0.25 mg. What would the dose be for a child weighing 75 pounds?
10. Ampicillin 50 mg/kg/day is recommended in 4 divided doses. How much would be given to a 66 lb. child for
one dose?
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 70
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
KEY: Comprehensive Test #1
1. 100 mcg : 1 tab = 0.2 mg : x tab
100 mcg : 1 tab = 200 mcg : x tab
100 x = 200
x = 2 tabs
2. 0.015 Gm : 1 tab = gr ss : x tabs
15 mg : 1 tab = 30 mg : x tabs
15 x = 30
x = 2 tabs
1 gr : 60 mg = 1/2 gr : x
x = 30 mg
3. 125 mg : 5 ml = 200 mg : x ml
125 x = 1000
x = 8 ml
1 dr : 4 ml = x dr : 8 ml
4x=8
x = 2 drams
4. 10,000 u : 1 ml = 4000 u : x ml
10,000 x = 4000
x = 4000
10000
x = .4 ml
5. 500 mg : 1.2 ml = 250 mg : x ml
500 x = 300
x = 300
500
x = .6 ml
6. 1000 (20) = 1000 = 33.3
10 (60)
30
33 gtts/min
7. 50 ml : 30 min = x ml : 60 min
30 x = 3000
x = 100 ml/hr
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 71
8. 40 mg : 4 cc = 20 mg : x cc
40 x = 80
x = 2 cc
2cc : 60 sec = X cc : 15 sec
60 x = 30
x = 30
60
x = .5 cc over 15 sec
9. 75 x 0.25 = 0.25 = 0.125 mg
150
2
10. 50 mg / 30 kg / day
1500 mg / day
1500 ÷ 4 = 375 mg per dose
1 kg : 2.2 lbs = x kg : 66
2.2 x = 66
x = 30 kg
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 72
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
Comprehensive Test #2
DIRECTIONS
1.
2.
3.
4.
5.
6.
This test consists of 10 items, each valued at 10 points.
You will have one (1) hour to complete the test.
A grade of at least 90% is required.
You must show your work and label your answers.
You must transfer your answers to the attached answer sheet.
Answers must be correctly labeled to be correct.
1. Ordered: Librium 10 mg po q 6 hrs. Available: Librium capsules gr 1/12. How many capsules will you give
each dose?
2. Ordered: Synthroid 0.05 mg po q am. Supplied: Synthroid 50 mcg scored tablets. How many tablets will you
give?
3. Kcl elixir 40 mEq po qid in juice is ordered. Kcl 20 mEq per 15 ml is available. How many ml will you give?
4. The doctor has ordered Humulin N 30 u and Humulin R 10 u q am. Using a 1 cc syringe, how many ml of
insulin would you administer when mixed?
5. Penicillin G 375,000 u is ordered q 6 hrs. It is available in 1,000,000 u vial (powder). If the powder is
dissolved in 3.6 ml of sterile water, there will be 250,000 u/ml. How many ml should be given per dose?
6. You want to administer 3000 cc of IV fluid in 24 hours. What rate would you set on the IV pump?
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 73
7. The doctor orders Gentamicin IVPB q 8 hrs to infuse over 30 minutes. The Gentamicin is mixed in 100 ml of
normal saline. How many drops per minute should the IVPB infuse if the set delivers 15 gtt/cc.
8. Your patient has an order for Reglan 10 mg IVP. Reglan 10 mg comes in 2 cc. The safe rate of administration
is 10 mg over 2 minutes. How many ml of Reglan will you push over 15 sec.?
9. A one year old child weighing 18 lbs has Dilantin 20 mg bid per NG ordered. If the adult dose of Dilantin is
300-400 mg/day what would the safe dose be for this child?
10. Pediatric dosage of Digoxin for children 2 wks to 2 yrs is 25-50 mcg/kg/day. What would the safe dose range
be for an infant weighing 22 lbs?
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 74
HINDS COMMUNITY COLLEGE
ASSOCIATE DEGREE NURSING
NURSING 1229
KEY: Comprehensive Test #2
1. 1 gr : 60 mg = 1/12 gr : x mg
x = 60
12
x = 5 mg
5mg : 1 cap = 10 mg : x caps
5x = 10
x = 2 caps
2. 1000 mcg : 1 mg = x mcg : .05 mg
50 mcg = x
50 mcg : 1 tab = 50 mcg : x
50 x = 50
x = 1 tab
3. 20 mEq : 15 ml = 40 mEq : x
20 x = 600
x = 30 ml
4. 100 u : 1 ml = 40 u : x ml
100 x = 40
x = .4 ml
5. 250,000 u : 1 ml = 375,000 : x
250,000 x = 375,000
x = 375,000
250,000
x = 1.5 ml
6. 3000 = 125 cc/hr
24
7. 100 (15) = 50 gtts/min
30
8. 2cc : 120 sec = x cc : 15 sec
120 x = 30
x = 30
120
x = .25 cc over 15 sec
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003Page 75
9.
18 X 300 = 36 mg
150
Safe dose :
36 - 48 mg
18 X 400 = 48 mg
150
10. 22 lbs = 10 kg
25/10 = 250
50/10 = 500
Safe dose = 250 - 500 mcg
C:\Documents and Settings\jacarrillo\Desktop\drug calculation\Drug Calc Study Guide Part II rev0403.wpd
Revised:
Spring 2003
Page 76