NR NR452 Medication Calculation Practice: Prepare for Math Exam

22 August 2024

NR452 Medication Calculation Practice: Preparation for Math Exam

NR452 Practice Medication Calculation - Student Copy 2022

Student Full Name: [Your Name] Date: [Insert Date] Time: [Insert Time]

During the NR452 course, you are required to demonstrate proficiency in medication calculations by passing the math exam with a 100% score on the first day of class. To prepare for the math exam, please thoroughly review the NR452 medication calculation policy and complete the attached NR452 medication calculation packet. This packet serves as supplemental practice in addition to the practice quiz available on Canvas.

Important Instructions:

  • Complete both the practice quiz on Canvas and this math packet before attempting the math exam.
  • If you experience difficulty completing the math practice packet, seek assistance from the Student Learning Center (SLC) or your designated course instructor.
  • Completion of the NR452 math packet is mandatory; it serves as your “ticket” to take the math exam on the first day of class. You will not be permitted to take the math exam if your work is incomplete.

Guidelines for Calculation:

  • Use the dimensional analysis method to show your work.
  • Round your answers to the specified decimal place(s).
  • Use a leading zero for amounts less than 1 (e.g., 0.6 mL).
  • Avoid trailing zeros (e.g., 6 mg instead of 6.0 mg).
  • Round drops (gtt) to the nearest whole number.

Per Chamberlain policy, you have three attempts to achieve the required 100% benchmark to pass the NR452 course. If you are unsuccessful on the first attempt, you must remediate with your didactic instructor by Thursday of Week 1. If unsuccessful on the second attempt, you must remediate with the SLS team by Tuesday of Week 2. After remediation, you must wait 24 hours before retaking the math exam. Schedule your retake with your didactic instructor once you have met all remediation requirements.

Please submit this medication calculation packet on Canvas by Sunday, March 5th, by 11:59 PM to qualify for the first medication calculation exam on the first day of class. Failure to submit by this deadline will result in a voided math exam and a zero in the gradebook. Additionally, students must complete the Math Calc Practice Exam with a score of 100% to proceed.

Example Calculations:

Question 1: Order: Morphine 5 mg IM Available: Morphine 10 mg/mL Calculation: How many mL will the nurse administer?

Calculation Process:

5 mg10 mg/mL=0.5 mL\frac{5 \, \text{mg}}{10 \, \text{mg/mL}} = 0.5 \, \text{mL}10mg/mL5mg​=0.5mL

Answer: 0.5 mL

Question 2: Order: Norepinephrine (Levophed) 0.2 mcg/kg/min IV Available: Norepinephrine 4 mg in 1 L of D5W Client Weight: 41 lb Calculation: At what rate will the nurse set the infusion? (Round to the nearest whole number.)

Calculation Process:

  1. 41 lb2.2 lb/kg=18.64 kg\frac{41 \, \text{lb}}{2.2 \, \text{lb/kg}} = 18.64 \, \text{kg}2.2lb/kg41lb​=18.64kg
  2. 0.2 mcg/kg/min×18.64 kg=3.728 mcg/min0.2 \, \text{mcg/kg/min} \times 18.64 \, \text{kg} = 3.728 \, \text{mcg/min}0.2mcg/kg/min×18.64kg=3.728mcg/min
  3. 3.728 mcg1000=0.003728 mg/min\frac{3.728 \, \text{mcg}}{1000} = 0.003728 \, \text{mg/min}10003.728mcg​=0.003728mg/min
  4. 0.003728 mg/min×1000 mL4 mg=0.932 mL/min\frac{0.003728 \, \text{mg/min} \times 1000 \, \text{mL}}{4 \, \text{mg}} = 0.932 \, \text{mL/min}4mg0.003728mg/min×1000mL​=0.932mL/min0.932 mL/min×60 min/hr=55.92 mL/hr0.932 \, \text{mL/min} \times 60 \, \text{min/hr} = 55.92 \, \text{mL/hr}0.932mL/min×60min/hr=55.92mL/hr

Answer: 56 mL/hr (rounded to the nearest whole number)

Question 3: Order: Propranolol (Inderal) 120 mg PO Available: Propranolol 30 mg tablets (scored tablet) Calculation: How many tablets will the nurse administer?

Calculation Process:

120 mg30 mg/tablet=4 tablets\frac{120 \, \text{mg}}{30 \, \text{mg/tablet}} = 4 \, \text{tablets}30mg/tablet120mg​=4tablets

Answer: 4 tablets

Question 4: Order: Risperidone (Risperdal Consta) 25 mg IM Available: Risperidone 25 mg/mL Calculation: How many milliliters will the nurse administer?

Calculation Process:

25 mg25 mg/mL=1 mL\frac{25 \, \text{mg}}{25 \, \text{mg/mL}} = 1 \, \text{mL}25mg/mL25mg​=1mL

Answer: 1 mL

Question 5: Order: Morphine 6 mg IM Available: Morphine 2 mg/mL Calculation: How many mL will the nurse administer?

Calculation Process:

6 mg2 mg/mL=3 mL\frac{6 \, \text{mg}}{2 \, \text{mg/mL}} = 3 \, \text{mL}2mg/mL6mg​=3mL

Answer: 3 mL

Question 6: Order: Procainamide to infuse at 2 mg/min IV Available: Procainamide 3 g/250 mL of D5W Calculation: At what rate will the nurse set the infusion? (Round to the nearest whole number.)

Calculation Process:

  1. 3 g=3000 mg3 \, \text{g} = 3000 \, \text{mg}3g=3000mg
  2. 2 mg/min×250 mL3000 mg=0.1667 mL/min\frac{2 \, \text{mg/min} \times 250 \, \text{mL}}{3000 \, \text{mg}} = 0.1667 \, \text{mL/min}3000mg2mg/min×250mL​=0.1667mL/min0.1667 mL/min×60 min/hr=10 mL/hr0.1667 \, \text{mL/min} \times 60 \, \text{min/hr} = 10 \, \text{mL/hr}0.1667mL/min×60min/hr=10mL/hr

Answer: 10 mL/hr

Question 7: Order: Amiodarone (Nexterone) to infuse at 0.6 mg/min IV Available: Amiodarone 150 mg/100 mL of D5W Calculation: At what rate will the nurse set the infusion? (Round to the nearest whole number.)

Calculation Process:

  1. 0.6 mg/min×100 mL150 mg=0.4 mL/min\frac{0.6 \, \text{mg/min} \times 100 \, \text{mL}}{150 \, \text{mg}} = 0.4 \, \text{mL/min}150mg0.6mg/min×100mL​=0.4mL/min
  2. 0.4 mL/min×60 min/hr=24 mL/hr0.4 \, \text{mL/min} \times 60 \, \text{min/hr} = 24 \, \text{mL/hr}0.4mL/min×60min/hr=24mL/hr

Answer: 24 mL/hr

Question 8: Order: Lidocaine to infuse at 4 mg/min IV Available: Lidocaine 2 g in 250 mL NS Calculation: At what rate will the nurse set the infusion? (Round to the nearest whole number.)

Calculation Process:

  1. 2 g=2000 mg2 \, \text{g} = 2000 \, \text{mg}2g=2000mg
  2. 4 mg/min×250 mL2000 mg=0.5 mL/min\frac{4 \, \text{mg/min} \times 250 \, \text{mL}}{2000 \, \text{mg}} = 0.5 \, \text{mL/min}2000mg4mg/min×250mL​=0.5mL/min
  3. 0.5 mL/min×60 min/hr=30 mL/hr0.5 \, \text{mL/min} \times 60 \, \text{min/hr} = 30 \, \text{mL/hr}0.5mL/min×60min/hr=30mL/hr

Answer: 30 mL/hr

Question 9: Order: Norepinephrine (Levophed) 0.1 mcg/kg/min to be infused IV Available: Norepinephrine 4 mg in 1 L of D5W Client Weight: 41 lb Calculation: At what rate will the nurse set the infusion? (Round to the nearest whole number.)

Calculation Process:

  1. 41 lb2.2 lb/kg=18.64 kg\frac{41 \, \text{lb}}{2.2 \, \text{lb/kg}} = 18.64 \, \text{kg}2.2lb/kg41lb​=18.64kg
  2. 0.1 mcg/kg/min×18.64 kg=1.864 mcg/min0.1 \, \text{mcg/kg/min} \times 18.64 \, \text{kg} = 1.864 \, \text{mcg/min}0.1mcg/kg/min×18.64kg=1.864mcg/min
  3. 1.864 mcg1000=0.001864 mg/min\frac{1.864 \, \text{mcg}}{1000} = 0.001864 \, \text{mg/min}10001.864mcg​=0.001864mg/min
  4. 0.001864 mg/min×1000 mL4 mg=0.466 mL/min\frac{0.001864 \, \text{mg/min} \times 1000 \, \text{mL}}{4 \, \text{mg}} = 0.466 \, \text{mL/min}4mg0.001864mg/min×1000mL​=0.466mL/min
  5. 0.466 mL/min×60 min/hr=27.96 mL/hr0.466 \, \text{mL/min} \times 60 \, \text{min/hr} = 27.96 \, \text{mL/hr}0.466mL/min×60min/hr=27.96mL/hr

Answer: 28 mL/hr (rounded to the nearest whole number)

Question 10: Order: Enoxaparin (Lovenox) 1 mg/kg SQ q 12 hours Client Weight: 176 lb Available: Enoxaparin 40 mg/0.4 mL Calculation: How much will the nurse administer per dose? (Round to the nearest tenth.)

Calculation Process:

  1. 176 lb2.2 lb/kg=80 kg\frac{176 \, \text{lb}}{2.2 \, \text{lb/kg}} = 80 \, \text{kg}2.2lb/kg176lb​=80kg
  2. 1 mg/kg×80 kg=80 mg1 \, \text{mg/kg} \times 80 \, \text{kg} = 80 \, \text{mg}1mg/kg×80kg=80mg
  3. 80 mg×0.4 mL40 mg=0.8 mL\frac{80 \, \text{mg} \times 0.4 \, \text{mL}}{40 \, \text{mg}} = 0.8 \, \text{mL}40mg80mg×0.4mL​=0.8mL

Answer: 0.8 mL

Question 11: Order: Amikacin (Amikin) 5 mg/kg/day IV in three divided doses Client Weight: 136 lb Calculation: How much medication is administered per day? (Round to the nearest whole number.)

Calculation Process:

  1. 136 lb2.2 lb/kg=61.82 kg\frac{136 \, \text{lb}}{2.2 \, \text{lb/kg}} = 61.82 \, \text{kg}2.2lb/kg136lb​=61.82kg
  2. 5 mg/kg/day×61.82 kg=309.1 mg/day5 \, \text{mg/kg/day} \times 61.82 \, \text{kg} = 309.1 \, \text{mg/day}5mg/kg/day×61.82kg=309.1mg/day

Answer: 309 mg (rounded to the nearest whole number)

Question 12: Order: Gentamicin (Garamycin) 2 mg/kg IV every 12 hours Client Weight: 188 lb Safe Dosage Range: Up to 6 mg/kg/day in 3 divided doses Calculation: What is the maximum dosage of medication that this client can receive per day? (Round to the nearest whole number.)

Calculation Process:

  1. 188 lb2.2 lb/kg=85.45 kg\frac{188 \, \text{lb}}{2.2 \, \text{lb/kg}} = 85.45 \, \text{kg}2.2lb/kg188lb​=85.45kg
  2. 6 mg/kg/day×85.45 kg=512.7 mg/day6 \, \text{mg/kg/day} \times 85.45 \, \text{kg} = 512.7 \, \text{mg/day}6mg/kg/day×85.45kg=512.7mg/day

Answer: 513 mg (rounded to the nearest whole number)

Question 13: Order: Tobramycin for a client who weighs 135 lb Minimum Therapeutic Dose: 3 mg/kg/day in 3 divided doses Calculation: What is the minimum therapeutic dose of tobramycin that this client should receive per day? (Round to the nearest whole number.)

Calculation Process:

  1. 135 lb2.2 lb/kg=61.36 kg\frac{135 \, \text{lb}}{2.2 \, \text{lb/kg}} = 61.36 \, \text{kg}2.2lb/kg135lb​=61.36kg
  2. 3 mg/kg/day×61.36 kg=184.08 mg/day3 \, \text{mg/kg/day} \times 61.36 \, \text{kg} = 184.08 \, \text{mg/day}3mg/kg/day×61.36kg=184.08mg/day

Answer: 184 mg (rounded to the nearest whole number)

These examples illustrate how to approach each medication calculation using dimensional analysis to ensure accuracy and patient safety. This practice will help you achieve the required proficiency for the NR452 math exam.