Exam 4: Basic Math Review: Preparing for Medication Calculations

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.

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Question 1

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$\frac{2.5 \mathrm{mg}}{\min } \times \frac{1 \mathrm{~g}}{1000 \mathrm{mg}} \times \frac{1000 \mathrm{~mL}}{4 \mathrm{~g}} \times \frac{60 \mathrm{~min}}{1 \mathrm{hr}}=\frac{150,000}{4000}=\frac{37.75 \mathrm{~mL}}{\mathrm{hr}}$

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.

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Question 2

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$\frac{55 \mathrm{~kg}}{1} \times \frac{3 \mathrm{mcg}}{\mathrm{kg} / \mathrm{min}} \times \frac{1 \mathrm{mg}}{1000 \mathrm{mcg}} \times \frac{500 \mathrm{~mL}}{100 \mathrm{mg}} \times \frac{60 \mathrm{~min}}{1 \mathrm{hr}}=\frac{49,500}{1000}=\frac{49.5 \mathrm{~mL}}{\mathrm{hr}}$

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.

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Question 3

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$\frac{100 \mathrm{~mL}}{20 \mathrm{~min}} \times \frac{15 \mathrm{gtt}}{1 \mathrm{~mL}}=\frac{1500}{20}=\frac{75 \mathrm{gtt}}{\mathrm{min}}$

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

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Question 4

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

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Question 5

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

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Question 6

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

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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. -1 L D5W to infuse in 8 hours

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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. -250 mL D10W over 10 hours

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Question 9

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

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Question 10

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.

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Question 11

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

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Question 12

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

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Question 13

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

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Question 14

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

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Question 15

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

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Question 16

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.

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Question 17

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

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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

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Question 19

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.

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Question 20

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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.

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.

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.

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

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

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

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

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

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

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.

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

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

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

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

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

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.

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

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

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.

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