Deck 4: Basic Math Review: Preparing for Medication Calculations

Question 1

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
500 mL D5LR to infuse in 4 hours

Answer 1

Question 2

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
0.45% NaCl 1000 mL over 6 hours

Answer 2

Question 3

Dosage Calculations
Calculate the following dosages.
How many tablets of Zaroxolyn are in one dose?
Ordered: Zaroxolyn 0.005 gm PO q AM
Available: 2.5-mg tablets

Answer 3

Question 4

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
1000 mL 0.45 NS to infuse over 8 hours

Question 5

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
1 L D5W to infuse in 8 hours

Question 6

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
KCl 20 mEq in 150 mL D₅W to infuse over 2 hours

Question 7

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
250 mL vancomycin to infuse over 2 hours

Question 8

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
100 mL Protonix to infuse over 2 hours

Question 9

Dosage Calculations
Calculate the following dosages.
What volume of PCN G is in one dose?
Ordered: PCN G 1.25 mil units
Available: Multidose vial labeled 500,000 units/mL after reconstitution

Question 10

Dosage Calculations
Calculate the following dosages.
What volume of aminophylline is one dose?
Ordered: aminophylline 175 mg IV q6h
Available: aminophylline ampule labeled 500 mg/20 mL

Question 11

Calculate IV rates in gtt/min.
Give 1000 mL D₅½NS q6h. Drop factor is 15 gtt/mL.

Question 12

Dosage Calculations
Calculate the following dosages.
What volume of PCN G constitutes one dose?
Ordered: PCN G 750,000 units IV q6h
Available: PCN G vial labeled 200,000 units/mL after reconstitution

Question 13

Dosage Calculations
Calculate the following dosages.
How many tablets of Synthroid will you give for one dose?
Ordered: Synthroid 0.1 mg PO every morning
Available: 50 mcg Synthroid tablets

Question 14

Dosage Calculations
Calculate the following dosages.
How much is one dose of Lanoxin?
Ordered: Lanoxin 375 mcg IV in the morning
Available: Lanoxin ampule labeled 0.5 mg/2 mL

Question 15

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
250 mL D10W over 10 hours

Question 16

Dosage Calculations
Calculate the following dosages.
How many milliliters of KCl will you give?
Ordered: KCl 15 mEq PO BID
Available: 20% KCl labeled 40 mEq/15 mL

Question 17

Calculate IV rates in gtt/min.
Give 1 unit PRBC over 2 hours. Blood bag states approximate volume is 250 mL. Drop factor is 10 gtt/mL.

Question 18

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
Magnesium sulfate 5 gm in 100 mL D₅W to infuse over 3 hours

Question 19

IV Rate Practice Problems
Calculations with conversion factors required. Round answers to the nearest tenth. Calculate IV rate in mL/hr for each problem.
500 mL 0.9 normal saline to infuse over 2 hours

Question 20

Dosage Calculations
Calculate the following dosages.
What volume of Heparin is one dose?
Ordered: Heparin 12,000 units SC q12h
Available: Heparin 20,000 units/mL

Question 21

Calculate small volumes to be infused in less than 1 hour in mL/hr.
Zantac 50 mg in ½ NS 50 mL over 15 minutes

Question 22

Calculate small volumes to be infused in less than 1 hour in gtt/min.
Ancef 250 mg IV piggyback diluted in 100 mL NS over 30 minutes. Drop factor is 10 gtt/min.

Question 23

Calculate small volumes to be infused in less than 1 hour in gtt/min.
Oxacillin 400 mg in 100 mL D₅W over 40 minutes. Secondary set delivers 15 gtt/mL.

Question 24

Calculate IV rates in gtt/min.
Infuse D₅W 1 L q12h. Drop factor is 20 gtt/mL.

Question 25

Calculate small volumes to be infused in less than 1 hour in gtt/min.
Piperacillin 2.5 gm IV q6h. Dilute in 100 mL D₅W and infuse over 30 minutes. Secondary set delivers 20 gtt/mL.

Question 26

Calculate small volumes to be infused in less than 1 hour in mL/hr.
Kefzol 500 mg in NS 75 mL over 30 minutes

Question 27

Calculate IV rates in gtt/min.
Administer 500 mL 0.45 NS over 4 hours. Drop factor is 10 gtt/min.

Question 28

Calculate IV rates for medications administered over time, based on body weight. Round answers to the nearest tenth. Set the rate in mL/hr.
Ordered: Infuse nitroprusside 100 mg in 500 mL D₅W at 3 mcg/kg/min. Patient weighs 55 kg.

Question 29

Calculate small volumes to be infused in less than 1 hour in gtt/min.
Tagamet 200 mg in D₅W 100 mL over 20 minutes. Drop factor is 15 gtt/mL.

Question 30

Calculate small volumes to be infused in less than 1 hour in mL/hr.
Staphcillin 1 g in 100 mL D₅W over 45 minutes

Question 31

Calculate IV rates for medications administered over time. Set the rate in mL/hr. Round answers to the nearest tenth.
Aminophylline 250 mg in 500 mL. Infuse at 30 mg/hr.

Question 32

Calculate IV rates for medications administered over time. Set the rate in mL/hr. Round answers to the nearest tenth.
Pronestyl 4 g in 1000 mL D₅W. Infuse at 2½ mg/min.

Question 33

Calculate small volumes to be infused in less than 1 hour in mL/hr.
Calcium gluconate 10% 16 mEq in 100 mL D₅W over 30 minutes

Question 34

Calculate IV rates in gtt/min.
Give 1500 mL 0.9 NS with 20 mEq K⁺ over 12 hours. Drop factor is 15 gtt/min.

Question 35

Calculate IV rates for medications administered over time, based on body weight. Round answers to the nearest tenth. Set the rate in mL/hr.
Ordered: Dobutrex 5 mcg/kg/min IV. Client weighs 145 lb.
Available: Dobutrex 250 mg in 250 mL D₅W

Question 36

Calculate IV rates for medications administered over time. Set the rate in mL/hr. Round answers to the nearest tenth.
Heparin 22,000 units in 500 mL NS at 800 units/hr.

Question 37

Calculate IV rates in gtt/min.
Give D₁₀W 250 mL over 8 hours. Microdrip set delivers 60 gtt/mL.

Question 38

Calculate small volumes to be infused in less than 1 hour in gtt/min.
Ticar 500 mg IV q6h. Dilute in 75 mL D₅W and give over 45 minutes via Buretrol set with a drop factor of 60 gtt/mL.

Question 39

Calculate IV rates for medications administered over time. Set the rate in mL/hr. Round answers to the nearest tenth.
Ordered: Morphine sulfate 10 mg/hr continuous IV
Available: MS 50 mg in 100 mL NS

Question 40

Calculate IV rates in gtt/min.
Infuse 1 L lactated Ringers over 10 hours. Drop factor is 25 gtt/ min.

Question 41

Pediatric Practice Problems
To determine whether dosages are appropriate, answer the following questions for each problem:
1. What is the appropriate low (therapeutic) to high (safe) range, in milligrams, for each dose of medication for this child?
2. What is the safe maximum dose for this child?
3. Is the prescribed dose therapeutic and/or safe?
a. If answer is yes, how much medication will be given for the ordered dose?
b. If answer is no, what will you do?
Round answers to the nearest tenth.
Ordered: Ibuprofen 40 mg PO q6h PRN temp higher than 101.8º F
Pediatric dose range: Child 6 mo to 12 yr, antipyretic: for temp lower than 102.5º F, 5 mg/kg/dose;
for temp higher than 102.5º F, 10 mg/kg/dose
May be given q6-8h: max daily dose of 40 mg/kg/day
Child's weight: 7-month-old weighs 18.5 lb; temp is 102.4º F.
Available: Ibuprofen susp. 80 mg/5 mL

Question 42

Calculate IV rates for medications administered over time, based on body weight. Round answers to the nearest tenth. Set the rate in mL/hr.
Ordered: Infuse amrinone 250 mg in 250 mL NS at 5 mcg/kg/min. Patient weighs 165 lb.

Question 43

Pediatric Practice Problems
To determine whether dosages are appropriate, answer the following questions for each problem:
1. What is the appropriate low (therapeutic) to high (safe) range, in milligrams, for each dose of medication for this child?
2. What is the safe maximum dose for this child?
3. Is the prescribed dose therapeutic and/or safe?
a. If answer is yes, how much medication will be given for the ordered dose?
b. If answer is no, what will you do?
Round answers to the nearest tenth.
Ordered: Dilantin 40 mg PO BID
Pediatric dose range: 5 to 7 mg/kg/day
Child's weight: 6.7 kg
Available: Dilantin 30 mg/5 mL susp

Question 44

Pediatric Practice Problems
To determine whether dosages are appropriate, answer the following questions for each problem:
1. What is the appropriate low (therapeutic) to high (safe) range, in milligrams, for each dose of medication for this child?
2. What is the safe maximum dose for this child?
3. Is the prescribed dose therapeutic and/or safe?
a. If answer is yes, how much medication will be given for the ordered dose?
b. If answer is no, what will you do?
Round answers to the nearest tenth.
Ordered: Gantrisin 1.5 g PO QID
Pediatric dose range: 150 to 200 mg/kg/day
Child's weight: 30.4 kg
Available: Gantrisin 500-mg tablets

Question 45

Pediatric Practice Problems
To determine whether dosages are appropriate, answer the following questions for each problem:
1. What is the appropriate low (therapeutic) to high (safe) range, in milligrams, for each dose of medication for this child?
2. What is the safe maximum dose for this child?
3. Is the prescribed dose therapeutic and/or safe?
a. If answer is yes, how much medication will be given for the ordered dose?
b. If answer is no, what will you do?
Round answers to the nearest tenth.
Ordered: Nebcin 10 mg IM q8h
Pediatric dose: 2.5 mg/kg/dose
Neonate's weight: 4000 g
Available: Nebcin 40 mg/mL

Question 46

Calculate IV rates for medications administered over time, based on body weight. Round answers to the nearest tenth. Set the rate in mL/hr.
Ordered: Dobutrex 6 mcg/kg/min. Bag is labeled D₅W 250 mL with 500 mg Dobutrex added. Patient weighs 198 lb.

Question 47

Pediatric Practice Problems
To determine whether dosages are appropriate, answer the following questions for each problem:
1. What is the appropriate low (therapeutic) to high (safe) range, in milligrams, for each dose of medication for this child?
2. What is the safe maximum dose for this child?
3. Is the prescribed dose therapeutic and/or safe?
a. If answer is yes, how much medication will be given for the ordered dose?
b. If answer is no, what will you do?
Round answers to the nearest tenth.
Ordered: Vistaril 10 mg IM q4-6h PRN nausea
Pediatric dose range: 0.5 to 1 mg/kg/dose
Child's weight: 44 lb
Available: Vistaril 25 mg/mL