Deck 25: Pediatric and Adult Dosage Calculation Based on Weight

Question 1

Directions: Calculate the following children's dosages.

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Order: Epinephrine 0.25 mg IV stat
Available: Epinephrine 0.1 mg/mL
How many milliliters will you prepare to administer? _____ mL

Answer 1

2.5

Question 2

Directions: Using the West nomogram, determine the body surface area (BSA) for a child with the height and weight given.

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22 inches and 10 lb: _____ m²

Answer 2

0.27

Question 3

Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
Erythromycin ethylsuccinate 62.5 mg p.o. q6h is ordered for an infant weighing 10 lb 4 oz. The recommended safe dosage is 30 to 50 mg/kg/24 hr divided q6h.
a. What is the infant's weight in kilograms? _____
b. What is the safe 24-hr dosage range for this infant? _____
c. What is the divided dosage range? _____
d. Is the dosage ordered safe? (Prove mathematically.) _______________ Explain your action. ______________________________

Answer 3

a. 16 oz = 1 lb 4 oz = 0.25 lb = 0.3 lb
2 lb = 1 kg
10.3 lb ÷ 2.2 = 4.68 = 4.7 kg
b. 4.7 kg * 30 mg/kg/24hr = 141 mg/24 hr
4.7 kg * 50 mg/kg/24hr = 235 mg/24hr
The dosage range 141 to 235 mg/day.
c. 141 mg ÷ 4 = 35.25 = 35.3 mg q6h
235 mg ÷ 4 = 58.75 = 58.8 mg q6h
The divided dosage range is 35.3 to 58.8 mg q6h.
d. No. The dosage is 62.5 mg * 4 = 250 mg/day. It exceeds the safe dosage range of 141 to 235 mg/day. Notify the prescriber.

Question 4

Directions: Use the appropriate formula to determine BSA. Express answer to the nearest hundredth.

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An adult who is 67 inches tall and weighs 175 lb: _____ m²

Question 5

Directions: Calculate the following children's dosages.

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Order: Nebcin 35 mg IV q8h
Available: How many milliliters will you administer? _____ mL

Question 6

Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
Order: Albuterol 1.2 mg p.o. t.i.d. is ordered for a child weighing 27 lb. The recommended dosage is 0.3 mg/kg/24 hr divided q8h.
Available:
a. What is the child's weight in kilograms? _____
b. What is the safe 24-hr dosage for this child? _____
c. What is the divided dosage? _____
d. Is the dosage ordered safe? (Prove mathematically.) _______________ Explain your action. ______________________________
e. How many milliliters of albuterol are needed to administer the dosage? _____

Question 7

Directions: Use the appropriate formula to determine BSA. Express answer to the nearest hundredth.

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An adolescent who measures 157.5 cm and weighs 59.1 kg: _____ m²

Question 8

Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
Gentamicin 45 mg IV q8h for a child weighing 45 lb. The recommended dosage is 6 to 7.5 mg/kg/day in three to four divided dosages.
a. What is the child's weight in kilograms? _____
b. What is the safe 24-hr dosage range for this child? _____
c. What is the divided dosage range? _____
d. Is the dosage ordered safe? (Prove mathematically.) _______________ Explain your action. ______________________________

Question 9

Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
Order: Ceclor (cefaclor) 100 mg p.o. q8h is ordered for a child weighing 32 lb. The recommended dosage is 20 to 40 mg/kg/day divided q8h.
Available:
a. What is the child's weight in kilograms? _____
b. What is the safe 24-hr dosage range for this child? _____
c. Is the dosage ordered safe? (Prove mathematically.) _______________ Explain your action. ______________________________
d. How many milliliters of Ceclor are needed to administer the dosage? _____

Question 10

Directions: Use the appropriate formula to determine BSA. Express answer to the nearest hundredth.

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A child who measures 26 inches and weighs 36 lb: _____ m²

Question 11

Directions: Using the West nomogram, determine the body surface area (BSA) for a child with the height and weight given.

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32 inches and 25 lb: _____ m²

Question 12

Directions: Calculate the following children's dosages.

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Order: Lanoxin (digoxin) elixir 0.1 mg p.o. daily
Available: How many milliliters will you administer? _____ mL

Question 13

Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
Phenobarbital 45 mg p.o.
b.i.d.
b.i.d. is ordered for a child with seizures weighing 35 lb. The recommended dosage is 6 to 8 mg/kg/24 hr, given every day or
a. What is the child's weight in kilograms? _____
b. What is the safe 24-hr dosage range for this child? _____
c. Is the dosage ordered safe? (Prove mathematically.) _______________ Explain your action. ______________________________

Question 14

Directions: Using the West nomogram, determine the body surface area (BSA) for a child with the height and weight given.

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80 cm and 11 kg: _____ m²

Question 15

Directions: Using the West nomogram, determine the body surface area (BSA) for a child with the height and weight given.

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170 cm and 50 kg: _____ m²

Question 16

Directions: Calculate the following children's dosages.

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Order: Garamycin 15 mg IV q8h
Available: How many milliliters will you administer? _____ mL

Question 17

Directions: Use the appropriate formula to determine BSA. Express answer to the nearest hundredth.

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An adult who measures 175 cm and weighs 85 kg: _____ m²

Question 18

Directions: Calculate the following children's dosages.

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Order: Kefzol 185 mg IV q6h
Available: How many milliliters will you add to the IV? _____ mL

Question 19

Directions: Calculate the following children's dosages.

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Order: Amoxil 75 mg p.o. q8h
Available: How many milliliters will you administer? _____ mL

Question 20

Directions: Calculate the following children's dosages.

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Order: Kantrex 65 mg IV q8h
Available: How many milliliters will you administer? _____ mL

Question 21

Directions: Determine the normal dosage range to the nearest tenth. State your course of action.
A child weighing 16.4 kg is to receive a medication IV with a dosage range of 100 to 150 mg/kg/day. The order is for 600 mg in 75 mL D5W q6h. Determine whether the dosage ordered is within normal limits. What is your course of action? ______________________________

Question 22

Child weighing 24 kg
a. Daily fluid maintenance _____________________ mL/day
b. IV rate __________________ mL/hr

Question 23

Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
The recommended dosage of Mezlin for an adult with a serious infection is 200 to 300 mg/kg/day given in four to six divided dosages. The adult weighs 175 lb.
a. What is the adult's weight in kilograms? _____
b. What is the 24-hr dosage range for the 175-lb adult in milligrams? _____
c. What is the dosage range in grams? _____

Question 24

Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
The recommended dosage of Ticar for an adult with a complicated urinary tract infection is 150 to 200 mg/kg/day IV in divided dosages every 4 or 6 hrs. The adult weighs 194 lb.
a. What is the 24-hr dosage range for the 194-lb adult in milligrams? _____
b. What is the dosage range in grams? _____
c. The prescriber ordered 4 g IV q6h. Is the dosage ordered safe? _____ Explain: ______________________________

Question 25

Directions: Determine the normal dosage range to the nearest tenth. State your course of action.
A child weighs 10 kg and is to receive 0.5 g of nafcillin in 100 mL D5W q6h. The dosage range is 100 to 200 mg/kg/day. What is your course of action? ______________________________

Question 26

Directions: Using the West nomogram or formula when indicated, calculate the following dosages. Express answer to the nearest tenth.
The recommended dosage of Paraplatin for ovarian cancer is 360 mg/m². The client's BSA is 1.67 m². What dosage should the client receive? _____

Question 27

Directions: Determine the volume of solution that must be added to the burette in the following problem. Determine the rate in gtt/min for each IV when a microdrop is used, then the rate in mL/hr for a controller.
The volume of a 75-mg dosage of medication is 3 mL. Dilute to 55 mL and infuse over 45 min.
a. Dilution volume: _____
b. gtt/min: _____
c. mL/hr: _____

Question 28

Directions: Using the West nomogram or formula when indicated, calculate the following dosages. Express answer to the nearest tenth.
The recommended dosage of methotrexate is 25 to 75 mg/m²/week. The child's height is 30 inches and the weight is 25 lb.
a. What is the child's BSA? _____
b. What is the recommended dosage range? _____

Question 29

Directions: Using the West nomogram or formula when indicated, calculate the following dosages. Express answer to the nearest tenth.
The recommended dosage of Zovirax for a child who is immunosuppressed and has a varicella-zoster infection is 500 mg/m². The child weighs 26.5 lb and is 58 inches tall.
a. What is the child's BSA? _____
b. What is the recommended dosage? _____

Question 30

Directions: Using the West nomogram or formula when indicated, calculate the following dosages. Express answer to the nearest tenth.
The recommended dosage of acyclovir is 250 mg/m². What will be the dosage for a child with a BSA of 0.27 m²? _____

Question 31

Child weighing 77 lb
Convert weight
Equivalent 2.2 lb= 1 kg
77 lb ÷ 2.2 = 35 kg

Question 32

Directions: Determine the normal dosage range to the nearest tenth. State your course of action.
An IV medication of 50 mcg in 200 mL is ordered to infuse over 2 hr. The normal dosage range is 1.5 to 3 mcg/kg/hr. The child weighs 5.7 kg. Determine the dosage range per hour. Determine whether the dosage ordered is within normal limits. State your course of action: ______________________________

Question 33

Directions: Determine the volume of solution that must be added to the burette in the following problem. Determine the rate in gtt/min for each IV when a microdrop is used, then the rate in mL/hr for a controller.
A medication of 1 g in 4 mL is to be diluted to 60 mL and infused over 90 min.
a. Dilution volume: _____
b. gtt/min: _____
c. mL/hr: _____