ATI RN
ATI Pharmacology Proctored Exam
1. A preschooler weighing 44 lb is to receive Amoxicillin 20 mg/kg/day PO divided equally every 12 hr. The available amoxicillin suspension is 250 mg/5 mL. How many mL should the nurse administer per dose?
- A. 4 mL
- B. 5 mL
- C. 6 mL
- D. 3 mL
Correct answer: A
Rationale: To calculate the dosage per administration: First, convert the weight to kg (44 lb / 2.2 lb/kg = 20 kg). Then, calculate the required dosage per dose: (20 mg/kg/day x 20 kg) / 2 (for every 12 hr dosing) = 200 mg per dose. To determine the mL per dose, divide the required dosage by the concentration of the amoxicillin suspension: (200 mg / 250 mg) x 5 mL = 4 mL per dose. Therefore, the correct answer is 4 mL. Choice B (5 mL) is incorrect because the correct calculation yields 4 mL. Choices C (6 mL) and D (3 mL) are also incorrect as they do not align with the accurate calculation based on the provided information.
2. A client has been prescribed isosorbide mononitrate. Which of the following should the nurse include in the client education related to this medication?
- A. This medication is prescribed for long-term therapy prophylaxis against anginal attacks
- B. Do not crush this medication
- C. Take the medication in the evening after dinner
- D. Do not take an additional tablet if you experience chest pain
Correct answer: A
Rationale: The correct answer is A because isosorbide mononitrate is used for long-term prophylaxis against anginal attacks. Choice B is incorrect because isosorbide mononitrate should not be crushed. Choice C does not specify a particular time for medication administration. Choice D is incorrect because isosorbide mononitrate is not meant to be taken as needed for chest pain; it is part of a long-term therapy plan.
3. Which lab value is essential for a patient receiving warfarin therapy?
- A. Monitor INR
- B. Monitor sodium levels
- C. Monitor potassium levels
- D. Monitor platelet count
Correct answer: A
Rationale: The correct answer is to monitor the INR (International Normalized Ratio) for a patient receiving warfarin therapy. INR monitoring is crucial to assess the effectiveness of warfarin in preventing blood clots while minimizing the risk of bleeding. Monitoring sodium levels (choice B), potassium levels (choice C), or platelet count (choice D) is not specifically essential for patients on warfarin therapy and does not provide direct information on the drug's anticoagulant effects.
4. Which positive ion is most prevalent in intracellular fluid?
- A. Calcium
- B. Potassium
- C. Sodium
- D. Magnesium
Correct answer: B
Rationale: The correct answer is Potassium (K+). Potassium is the predominant cation found within cells, making it the most prevalent positive ion in intracellular fluid. Calcium, sodium, and magnesium are also essential ions in the body, but they are not as abundant in intracellular fluid. Calcium is vital for bone health and muscle function, sodium helps in maintaining fluid balance and nerve function, and magnesium is involved in numerous biochemical reactions.
5. A parent of a child with cystic fibrosis is being taught about dietary guidelines. Which statement by the parent indicates an understanding of the teaching?
- A. My child should eat a high-calorie, high-protein diet.
- B. My child should avoid eating eggs.
- C. My child should follow a low-fat, low-sodium diet.
- D. My child should follow a high-fiber, high-protein diet.
Correct answer: A
Rationale: The correct answer is A. For a child with cystic fibrosis, a high-calorie, high-protein diet is recommended to meet the increased metabolic needs associated with the condition. The protein helps with growth and repair, while the extra calories help compensate for malabsorption and increased energy requirements. Choice B is incorrect because eggs are a good source of protein and essential nutrients unless the child has a specific allergy. Choice C is incorrect as a low-fat, low-sodium diet is not typically recommended for children with cystic fibrosis who need higher calorie and fat intake. Choice D is incorrect because while a high-protein diet is beneficial, a high-fiber diet may not be suitable for a child with cystic fibrosis due to potential gastrointestinal issues.
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