Exam 8: Advanced Intravenous Calculations

Calculate the hourly intravenous (IV) flow rates. -Ordered: Isoproterenol (Isuprel) IV infusion $120 \mathrm{mcg} \text { per hr }$ for a patient with coronary artery disease. IV solution at bedside: Isuprel $1 \mathrm{mg} \text { in } 500 \mathrm{~mL} \text { of } \mathrm{D} 5 \mathrm{~W}$ infusing at $50 \mathrm{~mL} \text { per hr. }$ a. What is the total drug:total mL ratio? b. How many mg per hr are ordered? c. How many mL per hr are ordered? d. Is the solution infusing at the correct flow rate? e. If not, what action should the nurse take?

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Question 1

Correct Answer:

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a. $1: 500(1 \mathrm{mg} .500 \mathrm{~mL})$
b. $0.12 \mathrm{mg}$ per hr $(120 \mathrm{mcg}+1000)$ (conversion: $1000 \mathrm{mcg}=1 \mathrm{mg})$
c. $60 \mathrm{~mL}$ per hr (1 $\mathrm{mg}: 500 \mathrm{~mL}=0.12 \mathrm{mg}: x \mathrm{~mL})$
d. No, the flow rate is incorrect.
e. Assess the blood pressure and heart rhythm and rate, and contact the prescriber for flow rate adjustment instructions.

If a patient is receiving 1.5 mg per hr of a drug in an IV, how many mcg per min are being infused?

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Question 2

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$1.5 \times 1000=\frac{1500 \mathrm{mcg} \text { per hr }}{60 \mathrm{~min}}=25 \mathrm{mcg}$ per min

Conversion factors: $1000 \mathrm{mcg}=1 \mathrm{mg}$

$60 \mathrm{~min}=1 \mathrm{hr}$

Ordered: Magnesium sulfate 1 g per hr for maintenance IV for a patient with preeclampsia. Available: Magnesium sulfate 40 g per 250 mL D5W. What flow rate you will set (in mL per hr rounded to nearest tenth of an mL) on the infusion pump?

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Question 3

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TD $\quad$ $\quad$ TV $\quad$ $\quad$ HD $\quad$ $\quad$ HV $4 \theta \mathrm{mg}: 25 \theta \mathrm{mL}=1 \mathrm{~g}: x \mathrm{~mL}$
$4: 25=1: x$
$4 x=25$
$x=6.25 \mathrm{~mL}$ rounded to $6.3 \mathrm{~mL}$ per hr

Proof $40 \times 6.25=250$
$\quad$ $\quad$ $1 \times 250=250$

Change the dose ordered per min to dose per hr in the metric terms requested. Use a calculator for long division and multiplication. Verify your entries and answers by entering the data twice. -Drug per kg per min: 5 mcg per kg per min Weight: 30 kg a. mcg per hr: b. mg per hr (to nearest tenth of an mg):

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Question 4

How many mg per mL are contained in this bag of IV solution?

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Question 5

Calculate the hourly intravenous (IV) flow rates. -You check your patient's IV flow rate in ICU on a pump. It is $7.2 \mathrm{~mL} \text { per hr. }$ Ordered: $30 \text { mcg per min }$ IV: $250 \mathrm{mg} \text { in } 1000 \mathrm{~mL}$ of solution. a. How many mg per hr are ordered? b. What is the total drug:total mL ratio? c. Is the flow rate correct? If not, what should it be? d. What is the appropriate nursing action, if any?

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Question 6

Change the dose ordered per min to dose per hr in the metric terms requested. Use a calculator for long division and multiplication. Verify your entries and answers by entering the data twice. -Drug per kg per min: 2 mcg per kg per min . Weight: 5.4 kg . a. mcg per hr: b. mg per hr (to nearest tenth of an mg):

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Question 7

Calculate the hourly intravenous (IV) flow rates. -Total drug: $100 \mathrm{mg} .$ Total volume: $100 \mathrm{~mL}$ . Hourly drug ordered: $4 \mathrm{mg} .$ What is the hourly volume (mL per hr to nearest tenth of an mL)?

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Question 8

Solve the following problems using a calculator, moving decimals, reducing drug:total volume ratios, and labeling your answers. -Ordered: Cardizem 20 mg IV for a rapid ventricular rate. Available: Cardizem 5 mg per mL after reconstitution. Literature recommendation: Give each single dose over 2 min. a. What is the total mL to be injected? b. What is the total mL per min to be injected?

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Question 9

Calculate the hourly intravenous (IV) flow rates. -The IV for a patient in critical care is flowing at $12 \mathrm{~mL} \text { per hr }$ Ordered: $0.2 \mathrm{mg} \text { per } \mathrm{min} \text {. }$ IV: $0.2 \mathrm{mg} \text { per } \mathrm{min} \text {. }$ a. How many mg per hr are ordered? b. What is the total drug:total mL ratio? c. Is the flow rate correct? If not, what should it be? d. What is the appropriate nursing action, if any?

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Question 10

Calculate the hourly intravenous (IV) flow rates. -Total drug: $1 \mathrm{~g} .$ Total volume: $500 \mathrm{~mL}$ Hourly drug ordered: $15 \mathrm{mg} .$ What is the hourly volume (mL per hr to nearest tenth of an mL)?

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Question 11

Calculate the hourly intravenous (IV) flow rates. -Ordered: Sodium nitroprusside IV $0.5 \text { mcg per kg per min }$ to maintain blood pressure. Patient weight: $80 \mathrm{~kg} .$ Available: Sodium nitroprusside $25 \mathrm{mg} \text { in } 250 \mathrm{~mL} \mathrm{D} 5 \mathrm{~W}$ a. What is the total drug:total mL ratio? b. How many mcg per hr are ordered? c. How many mg per hr are ordered? d. How many mL per hr are needed to the nearest tenth of an mL?

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Question 12

Ordered: Granisetron hydrochloride injection (Kytril) $10 \text { mcg per kg }$ IV injection $30 \mathrm{~min}$ before chemotherapy to reduce nausea and vomiting. Available: Kytril vial IV $0.1 \mathrm{mg} \text { per } \mathrm{mL}$ Patient weight: $60 \mathrm{~kg}$ . Dilution: May be given undiluted as an injection into a port over $30 \text { seconds. }$ The nurse adds $2.4 \mathrm{~mL}$ of sterile NS for injection to the medication for ease of timing the injection rate into the injection port. a. What is the total dose of drug in mg to be given? b. What is the total volume of drug for injection? c. How many total seconds per calibration? $Ordered: Granisetron hydrochloride injection (Kytril) 10 \text { mcg per kg } IV injection 30 \mathrm{~min} before chemotherapy to reduce nausea and vomiting. Available: Kytril vial IV 0.1 \mathrm{mg} \text { per } \mathrm{mL} Patient weight: 60 \mathrm{~kg} . Dilution: May be given undiluted as an injection into a port over 30 \text { seconds. } The nurse adds 2.4 \mathrm{~mL} of sterile NS for injection to the medication for ease of timing the injection rate into the injection port. a. What is the total dose of drug in mg to be given? b. What is the total volume of drug for injection? c. How many total seconds per calibration?$

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Question 13

Ordered: Nitroprusside sodium at 0.4 mcg per kg per min for a patient with severe hypertension. Patient weight is 198 lb. Available: Nitroprusside sodium 50 mg in 250 mL D5W. a. What is the patient's weight in kg? b. What is the hourly drug ordered in mg (to the nearest tenth of an mg)? c. What is the flow rate to be set on the infusion pump?

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Question 14

Ordered: Aminophylline 10 mg per hr for a patient with asthma. Available: Aminophylline 250 mg in 1000 mL D5W infusing at 30 mL per hr on an infusion pump. a. What is the ordered mL per hr flow rate? b. Is the current flow rate correct? If not, what action should the nurse take?

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Question 15

Calculate the hourly intravenous (IV) flow rates. -Ordered: Diltiazem hydrochloride 5 mg per hr IV infusion for a patient with an arrhythmia. Available from pharmacy: Diltiazem 200 mg in 250 mL NS. a. What is the total drug:total volume ratio in solution? b. What is the flow rate for this order to nearest tenth of an mL? c. How many mg per mL are in the final concentration?

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Question 16

Calculate the hourly intravenous (IV) flow rates. -Ordered: Nicardipine hydrochloride IV $1.2 \mathrm{mg} \text { per hr }$ for a patient with hypertension. IV solution at bedside: $25 \mathrm{mg}$ nicardipine in $500 \mathrm{~mL}$ of normal saline (NS) infusing at $24 \mathrm{~mL} \text { per hr }$ a. What is the total drug:total mL ratio? b. What is the mL per hr ordered flow rate for this solution? c. Is the solution infusing at the correct flow rate? d. If not, what action should the nurse take?

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Question 17

Calculate the hourly intravenous (IV) flow rates. -Total drug: $250 \mathrm{mg} .$ Total volume: $1000 \mathrm{~mL} .$ Hourly drug ordered: $6 \mathrm{mg} .$ What is the hourly volume (mL per hr to nearest tenth of an mL)?

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Question 18

Ordered: Dopamine IV at 4 mcg per kg per min. Safe dose range (SDR): 2-10 mcg per kg per min. IV is flowing at 10 mL per hr. Patient weight: 60 kg. a. Is the order within SDR? b. What is the total mg per min ordered? c. What is the total mg per hr ordered (to the nearest tenth of an mg)? d. How many total mL per hr are ordered? e. Is the current IV flow rate correct? If not, what nursing actions are necessary?

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Question 19

Solve the following problems using a calculator, moving decimals, reducing drug:total volume ratios, and labeling your answers. -Ordered: Morphine sulfate 10 mg direct IV for severe pain. Literature recommendation: Dilute to 5 mL with sterile water for injection or sterile saline for injection and infuse over 4 min. a. How many mL of the drug will be withdrawn from the vial (to the nearest tenth)? b. How many mL will be in the syringe after dilution? Indicate the dose on the syringe. c. How many mL per min will be injected? d. How many total seconds will the injection take? e. How many seconds per calibration?

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Question 20

Showing 1 - 20 of 30

If a patient is receiving 1.5 mg per hr of a drug in an IV, how many mcg per min are being infused?

Ordered: Magnesium sulfate 1 g per hr for maintenance IV for a patient with preeclampsia. Available: Magnesium sulfate 40 g per 250 mL D5W. What flow rate you will set (in mL per hr rounded to nearest tenth of an mL) on the infusion pump?

How many mg per mL are contained in this bag of IV solution?

Calculate the hourly intravenous (IV) flow rates. -Total drug: $100 \mathrm{mg} .$ Total volume: $100 \mathrm{~mL}$ . Hourly drug ordered: $4 \mathrm{mg} .$ What is the hourly volume (mL per hr to nearest tenth of an mL)?

Calculate the hourly intravenous (IV) flow rates. -Total drug: $1 \mathrm{~g} .$ Total volume: $500 \mathrm{~mL}$ Hourly drug ordered: $15 \mathrm{mg} .$ What is the hourly volume (mL per hr to nearest tenth of an mL)?

Ordered: Aminophylline 10 mg per hr for a patient with asthma. Available: Aminophylline 250 mg in 1000 mL D5W infusing at 30 mL per hr on an infusion pump. a. What is the ordered mL per hr flow rate? b. Is the current flow rate correct? If not, what action should the nurse take?

Calculate the hourly intravenous (IV) flow rates. -Total drug: $250 \mathrm{mg} .$ Total volume: $1000 \mathrm{~mL} .$ Hourly drug ordered: $6 \mathrm{mg} .$ What is the hourly volume (mL per hr to nearest tenth of an mL)?

General Mathematics

Ratio and Proportion

Safe Medication Administration

Medication Measurements and Oral Dose Calculations

Injectable Medication and Syringe Measurements

Reconstituted Oral and Injectable Medications

Basic Intravenous Calculations

Insulin Administration

Parenteral Nutrition

Anticoagulants

Pediatric Medications

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Exam 8: Advanced Intravenous Calculations

If a patient is receiving 1.5 mg per hr of a drug in an IV, how many mcg per min are being infused?

Ordered: Magnesium sulfate 1 g per hr for maintenance IV for a patient with preeclampsia. Available: Magnesium sulfate 40 g per 250 mL D5W. What flow rate you will set (in mL per hr rounded to nearest tenth of an mL) on the infusion pump?

How many mg per mL are contained in this bag of IV solution?

Calculate the hourly intravenous (IV) flow rates. -Total drug: 100mg.100 \mathrm{mg} .100mg. Total volume: 100 mL100 \mathrm{~mL}100 mL . Hourly drug ordered: 4mg.4 \mathrm{mg} .4mg. What is the hourly volume (mL per hr to nearest tenth of an mL)?

Calculate the hourly intravenous (IV) flow rates. -Total drug: 1 g.1 \mathrm{~g} .1 g. Total volume: 500 mL500 \mathrm{~mL}500 mL Hourly drug ordered: 15mg.15 \mathrm{mg} .15mg. What is the hourly volume (mL per hr to nearest tenth of an mL)?

Ordered: Aminophylline 10 mg per hr for a patient with asthma. Available: Aminophylline 250 mg in 1000 mL D5W infusing at 30 mL per hr on an infusion pump. a. What is the ordered mL per hr flow rate? b. Is the current flow rate correct? If not, what action should the nurse take?

Calculate the hourly intravenous (IV) flow rates. -Total drug: 250mg.250 \mathrm{mg} .250mg. Total volume: 1000 mL.1000 \mathrm{~mL} .1000 mL. Hourly drug ordered: 6mg.6 \mathrm{mg} .6mg. What is the hourly volume (mL per hr to nearest tenth of an mL)?

General Mathematics

Ratio and Proportion

Safe Medication Administration

Medication Measurements and Oral Dose Calculations

Injectable Medication and Syringe Measurements

Reconstituted Oral and Injectable Medications

Basic Intravenous Calculations

Insulin Administration

Parenteral Nutrition

Anticoagulants

Pediatric Medications

Filters

Calculate the hourly intravenous (IV) flow rates. -Total drug: $100 \mathrm{mg} .$ Total volume: $100 \mathrm{~mL}$ . Hourly drug ordered: $4 \mathrm{mg} .$ What is the hourly volume (mL per hr to nearest tenth of an mL)?

Calculate the hourly intravenous (IV) flow rates. -Total drug: $1 \mathrm{~g} .$ Total volume: $500 \mathrm{~mL}$ Hourly drug ordered: $15 \mathrm{mg} .$ What is the hourly volume (mL per hr to nearest tenth of an mL)?

Calculate the hourly intravenous (IV) flow rates. -Total drug: $250 \mathrm{mg} .$ Total volume: $1000 \mathrm{~mL} .$ Hourly drug ordered: $6 \mathrm{mg} .$ What is the hourly volume (mL per hr to nearest tenth of an mL)?