NUR 2349 Dosage Calculations - Final Exam V2(Qns & Ans) - Rasmussen 2025, Exams of Nursing

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NUR 2349

DOSAGE CALCULATION

FINAL EXAM REVIEW V

QNS & ANS

1. A nurse is caring for a client who has prescription for meperidine (Demerol) 50mg PO every 3 hr PRN for moderate pain, and meperidine 75mg PO every 3 hr PRN for severe pain. At 1200, the client reports back pain rated as 8 on a pain scale of 0 to 10. The client received 75mg PO at 0700 and 50mg PO at 1000. Which of the following actions should the nurse plan to take? Administer meperidine 50mg now. Administer meperidine 50mg at 1300. Administer meperidine 75mg now. Administer meperidine 75mg at 1300. Rationale: Last dose was 5 hours ago
2. A nurse is reviewing a client’s prescriptions. The nurse should contact the provider to clarify which of the following prescriptions? Ampicillin 100mg/kg/day by mouth in 4 equally divided doses Phenytoin (Dilantin) 100mg by mouth daily Metronidazole (Flagyl) 500mg IV bolus every 3 hr Acetaminophen (Tylenol) 325 mg by mouth PRN for headache Rationale: Name of medication, dosage, route, and circumstance for administration, but not frequency
3. A nurse working in a medical surgical unit is preparing to administer medications to a client. The nurse plans to use two forms of identification to verify that she has the right client. Which of the following actions should the nurse take to identify the client? (Select all that apply.) Compare the name of the client’s wristband with the name of the MAR Ask the client to state his date of birth Check the room number on the MAR with the room number of the client Ask the client to state his name. Use the bar code scan to identify the client

Dosage Calculation Dimensional Analysis: Desired Over Have

Oral (PO)

4. A nurse is preparing to administer doxycycline (Vibramycin) 100mg PO every 12hr. Available is doxycycline 50 mg tablets. How many tablets should the nurse administer per dose? (round answer to nearest whole number.) 2
5. A nurse is preparing to administer quinapril (Accupril) 40 mg PO daily. Available is quinapril 20mg tablets. How many tablets should the nurse administer daily? (round answer to nearest whole number.) 2 Injectable
6. A nurse is preparing to administer methylprednisolone sodium succinate (Solu-Medrol) 120 mg IV bolus every 6 hr. Available is methylprednisolone sodium succinate injection 80 mg/mL. How many mL should the nurse administer per dose? (round answer to the nearest tenth) 1.5 mL
7. A nurse is preparing to administer furosemide (Lasix) 30 mg IV bolus stat. Available is furosemide injection 10 mg/mL. How many mL should the nurse administer? (round answer to the nearest tenth) 3 Powdered
8. A nurse is preparing to administer oxacillin (Bactocill) 500 mg IV bolus. The nurse reconstitutes oxacillin 250 mg vial with 2.8 mL sterile water for injection to yield 250 mg/1.5 mL. How many mL should the nurse administer? (Round to the nearest whole number) 3 mL

Parenteral (IV) Medication

19. A nurse is preparing to administer lactated Ringer’s 1 L to infuse over 2 hr. The drop factor of the manual IV tubing is 15 gtt/mL. The nurse should set the manual IV pump to deliver how many gtt/min? (Round to nearest whole number)

Volume (mL) x drop factor (gtt/mL) = x

Time (min)

OR

INFUSION AMOUNT / TOTAL MINUTES x GTT

1 L = 1000 mL 2 hr = 120 min 1000 mL x 15 gtt/mL = 125 gtt/min 120 min

20. A nurse is preparing to administer pantoprazole (Protonix) 80 mg by intermittent IV bolus every 12 hr. Available is pantoprazole injection 80 mg in 0.9 sodium chloride (0.9% NaCl) 100 mL to infuse over 15 min. The nurse should set the IV pump to deliver how many mL/hr? (Round to nearest whole number)

Volume (mL) = X mL/hr Time

(hr)

15 min = 0.25 hr 100 mL/0.25 hr = X ml/hr X = 400 mL Dosage by Weight

21. A nurse is preparing to administer ceftazidime (Fortaz) 30mg/kg/day IV bolus divided in equal doses every 8 hr to a toddler who weighs 22 lb. Available is ceftazidime injection 280 mg/mL. How many mL should the nurse administer per dose? (Round to the nearest tenth) 22 lb x 1 kg/2.2 lb= 10 kg 30 mg/kg/day x 10 kg = 300 mg/day divided by 3 = 100 mg/dose 280 mg = 100 mg X = 0.4 mL mL X mL
22. A nurse is preparing to administer gluconate (Karon) 3 mEq/kg/day PO divided in equal doses every 6 hr to a preschooler who weighs 42 lb. Available is potassium gluconate liquid 20 mEq/15mL. How many mL should the nurse administer per dose? (Round to the nearest whole number) 42 lb x 1 kg/2.2lb = 19 kg x 3 mEq/day = 57 mEq/day divide by 4 = 14.25 mEq/dose 20 mEq = 14.25 mEq X = 11 mL 15 mL X mL 1. The physician orders to give IV Penicillin 100,000 units. The Penicillin on hand is labeled 250,000 units/mL. How much of the drug will you administer? 0.4 mL 2. Administer a dose of Vitamin K (Aquamephyton) 0.5 mg. Available: Vitamin K 1 mg/1mL. How many mLs would you administer? 0.5 mL 3. Morphine sulfate 6 mg IV push q4h for pain. On hand: Morphine sulfate 10 mg per mL. How many mLs would you give? 0.6 mL 4. Doctor orders 10 units of insulin per hour via infusion pump. Insulin 100 units in 250 normal saline solution is available. How many mL will the nurse set the pump on? 25 mL/hr

5. Order: Kanamycin (Kantrex) 1 g po q6h x 3 days. Drug available Kantrex 500 mg. How many capsules will you administer per day? 8 capsules/day 6. In ectopic pregnancies RhoGam is administered. Order is for 300 mcg IM. On- hand is RhoGam 150mcg/mL. How many milliliters would you administer? 2 mL 7. Ordered is Misoprostol (Cytotec) 200 mcg po to be given q4h for 24 hours. On- hand is 100 mcg tablet. How many tablets would you administer each day? 12 tablets/day 8. Methotrexate is given for molar pregnancy in serial IM injections. An order for Methotrexate 25 mg weekly x 4 weeks was written. On-hand is Methotrexate 50 mg/2mL vial. How many millimeters would you administer each week? 1 mL 9. Dexamethasone is used in preterm labor patients. Order is for 6 mg every 12 hrs for 2 doses. On-hand is Dexamethasone 12 mg/2mL vial. How many millimeters would you administer per dose? 1 mL

21. Jessie, who weighs 80 lbs 1,827 mL/day 22. Lisa, who weighs 11 kg 1 ,050 mL/day BSA & Recommended Dosage: Round answer to the nearest tenth.

23. A pediatrician has ordered ampicillin 50 mg/kg/day po divided q6h for a child who weigh 44 lbs a. How many kilograms does the child weigh? 20 kg b. How many milligrams should the child receive per day? 1,000 mg/day c. How many milligrams should the child receive per dose? 250 mg/dose 24. Use the ordered dose from problem #23. The pharmacy has supplied reconstituted ampicillin, with a supply dosage of 500 mg/5 mL. How many milliliters should be given per q6h dose? 2.5 mL/dose
24. Mandy, a child who weighs 15 kilograms, is to be given amoxicillin. The recommended dosage of amoxicillin for children is 20 to 40 mg/kg/day po in equally divided doses administered q 8h. a. What is the minimum recommended range of milligrams of medication for this child per day? Maximum? 300 mg/day (min) and 600 mg/day (max) b. What is the minimum recommended range of milligrams of medication for this child per q8h dose? Maximum? 100 mg/dose (min) and 200 mg/dose (max)
25. The pediatrician has ordered amoxicillin 125 mg po q8h for Mandy. The available supply of amoxicillin is 125 mg/5 mL. a. Is her order within the recommended range for this medication? (yes/no) Yes b. If so, how many mL of amoxicillin should be given per q8h administration? 5 mL
26. A pediatrician orders Demerol 1mg/kg/day po divided q4h prn for a child who weighs 33 lbs.

a. How many kilograms does this child weigh? 15 kg b. How many milligrams of Demerol should this child receive per day? 15 mg/day c. How many milligrams of Demerol should this child receive per dose? 2. mg/dose

28. A 6-year old weighing 25 kg has a staph infection and the provider has ordered Penicillin. The recommended dose of Penicillin for children is 25 to 50 mg/kg/day po in equally divided doses administered q6h. a. What is the minimum recommended range of milligrams of medication for this child per day? Maximum? 625 mg/day (min) and 1,250 mg/day (max)
29. The following order was written for a child weighing 66 lbs. Order: Morphine 0.2 mg/kg/day po q6h prn pain. a. How many kilograms does this child weigh? 30 kg b. How many milligrams should the child receive per day? 6 mg/day c. How many milligrams should the child receive per dose? 1.5 mg/dose
30. The pediatrician orders Dicloxacillin 62.5 mg po q6h for a child with a staph infection. The child weighs 77 lbs. The drug reference recommends a dose of 12.5- 50 mg/kg in divided doses of q6h for a child < 40 kg, with a maximum of 4 g per day. a. How many kilograms does this child weigh? 35 kg b. Calculate the minimum recommended dosage. 437.5 mg/day c. Calculate the maximum recommended dosage. 1 ,750 mg/day d. Is this order within the recommended range for this child? No e. If unsafe, what action should be taken by the nurse? Contact Provider Flow Rates: Round answer to the nearest whole number. 31.1200 mL D10W IV to infuse in 10 hours by infusion pump. 120 ml/hr 32.2 L D5W IV to infuse 24 hours by infusion pump. 83 mL/hr 33.1.5 L D5 ½ NS IV to infuse 20 hours by infusion pump. 75 mL/hr

43. Calculate the IV flow rate for 100 mL NS to infuse over 30 minutes. Drop factor is 20 gtt/min. 67 gtts/min 44. Calculate the IV flow rate for 1L to infuse over 8 hours. Drop factor is 10 gtt/min. 21 gtts/min 45. Calculate the IV flow rate for 1000 mL D5W IV to infuse in 8 hours. Drop factor is 15 gtt/mL. 31 gtts/min BSA: Round to the nearest tenth.

46. Marcus, who weighs 9 kg and is 50 inches tall. BSA 0.6 m
47. Tonya, who is 80 cm tall and weighs 20 kg. BSA 0.7 m
48. Alicia, who weighs 15 kg and is 90 cm tall. BSA 0.6 m
49. Tommy, who is 35 inches tall and weighs 40 lbs. BSA 0.7 m
50. Allison, who measures 56 inches tall weighs 68 lbs. BSA 1.1 m
51. Kevin, who measures 61 inches tall and weighs 84 lbs. BSA________ 1. m

52. Jenny, whose BSA is 0.45 m2, is to receive Oncovin 2 mg/m2 once per week. The supply dosage available is 5 mg/mL. a. How many milligrams of Oncovin should she receive per administration? 0.9 mg b. How many milliliters should be administered per dose? 0.18 mL/dose
53. Matt, who measures 177.5 cm tall and weighs 81.8 kg. BSA __________ 2 m
54. Sally, whose BSA is 1.25 m2, is to receive acyclovir 600 mg po qid. The drug reference guide recommends 500 mg/m2 q8h. The supply available is 800 mg/2mL. a. How many milligrams of acyclovir should she receive per administration? 625 mg b. How many milliliters should be administered per dose (round to nearest tenth)? 1.6 mL/dose c. Is this considered a safe dose? If not, what should the nurse do? No, contact provider
55. Kevin, a 5-year old with herpes simplex, is measured at 42 inches tall and weighs 43 lbs. The pediatrician prescribes ritonavir 200 mg po bid. The drug reference recommends the dose of 250 mg/m2 bid for a child. a. What is Kevin’s BSA (round to nearest tenth)? 0.8 m b. Calculate the recommended dose. 200 mg c. Is this dose safe? If not, what should the nurse do? Yes Critical Care: Round answer to the nearest whole number. 56. A critical care patient who weighs 80 kg has an order for 10 mcg/kg/min of dobutamine to be administered by electronic pump. The supply of dobutamine is 500 mg in 250 mL of D5W. What is the flow rate per hour? 24 mL/hr
56. The patient is to receive Pitocin (oxytocin) at a rate of 8 milliunits per minute. The IV contains 10 units of Pitocin in 1000 mL Lactated Ringers. How many mL/hr should be set on the pump to infuse the required dose? 48 mL/hr

Heparin: Calculate the flow rate. Round to the nearest whole number.

66. Order: 0.45% NS 1,000 mL IV with heparin 25,000 units to infuse at 1, units/hr. 40 mL/hr

67. Order: D5W 500 mL IV with heparin 40,000 units to infuse at 1,100 units/hr. 14 mL/hr 68. Order: 0.45% NS 500 mL in IV with heparin 25,000 units to infuse at 500 units/hr. 10mL/hr
68. Order: D5W 500 mL IV with heparin 40,000 units to infuse at 1,500 units/hr. 19 mL/hr 70. Order: D5W 500 mL IV with heparin 25,000 units to infuse at 800 units/hr. 16 mL/hr