HESI LPN
HESI CAT Exam Quizlet
1. An 8-year-old child who weighs 60 pounds receives an order for Polycilin (Ampicillin) suspension 25 mg/kg/day divided into a dose every 8 hours. The medication is labeled '125 mg/5 ml'. How many ml should the nurse administer per dose every 8 hours?
- A. 5
- B. 10
- C. 15
- D. 20
Correct answer: A
Rationale: Calculate the daily dose first: 60 pounds x 25 mg/kg = 1500 mg/day. Divide by 3 doses = 500 mg/dose. Convert to mL: (500 mg / 125 mg) x 5 ml = 20 ml. However, the question asks for the dose per administration every 8 hours, which is 1/3 of the daily dose. So, the correct calculation should be (20 ml / 3) = 6.67 ml, which rounds to 5 ml. Therefore, the correct answer is 5 ml. Choice B (10 ml) is incorrect because it doesn't consider the frequency of dosing. Choice C (15 ml) is incorrect as it overestimates the dose. Choice D (20 ml) is incorrect as it represents the total daily dose, not the dose per administration every 8 hours.
2. A male client admitted three days ago with respiratory failure is intubated and receiving 40% oxygen per facemask. Currently, his temperature is 99°F, capillary refill is less than 4 seconds, and respiratory effort is within normal limits. What outcome should the nurse evaluate to measure for successful extubation?
- A. Exhibits adequate tissue perfusion
- B. Remains free of injury
- C. Remains free of infection
- D. Maintains effective breathing pattern
Correct answer: D
Rationale: Successful extubation is primarily measured by the client's ability to maintain an effective breathing pattern. This indicates that the client can adequately oxygenate and ventilate without the need for artificial airway support. Choices A, B, and C are important aspects of patient care but are not the primary outcomes to evaluate for successful extubation. Adequate tissue perfusion, freedom from injury, and prevention of infection are ongoing goals during the client's hospitalization but are not the immediate focus when considering extubation.
3. A client has a history of vasovagal attacks resulting in brady-dysrhythmias. Which instruction is most important to include in the teaching plan?
- A. Use stool softeners regularly
- B. Avoid electromagnetic fields
- C. Maintain a low-fat diet
- D. Do not use aspirin products
Correct answer: A
Rationale: The correct answer is A: 'Use stool softeners regularly.' Vasovagal attacks can be triggered by straining, and using stool softeners can help prevent such attacks. Choices B, C, and D are not directly related to preventing vasovagal attacks in this context. Avoiding electromagnetic fields, maintaining a low-fat diet, or not using aspirin products are important for various health reasons but not specifically for preventing vasovagal attacks related to brady-dysrhythmias.
4. The nurse is assessing an infant with pyloric stenosis. Which pathophysiological mechanism is the most likely consequence of this infant’s clinical picture?
- A. Metabolic acidosis
- B. Metabolic alkalosis
- C. Respiratory alkalosis
- D. Respiratory acidosis
Correct answer: B
Rationale: Pyloric stenosis often leads to metabolic alkalosis due to the loss of gastric acid from vomiting. Metabolic acidosis would not be expected in pyloric stenosis as there is no excessive acid accumulation. Respiratory alkalosis and respiratory acidosis are not typically associated with pyloric stenosis, making them incorrect choices.
5. A client is admitted with severe dehydration. What is the most important assessment finding for the nurse to monitor?
- A. Changes in mental status
- B. Urine output and color
- C. Blood pressure and heart rate
- D. Skin turgor
Correct answer: A
Rationale: Changes in mental status are crucial to monitor in a client with severe dehydration. Altered mental status, such as confusion or lethargy, can indicate severe dehydration and potential complications like electrolyte imbalances affecting the brain. Monitoring urine output and color (choice B) is essential but may not provide immediate signs of severe dehydration. While monitoring blood pressure and heart rate (choice C) is important, changes in mental status take precedence as they can indicate more critical conditions. Skin turgor (choice D) is a valuable assessment for dehydration, but changes in mental status take priority due to their direct correlation with severe dehydration.
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