an 8 year old child who weighs 60 pounds receives an order for polycilin ampicillin suspension 25 mgkgday divided into a dose every 8 hours the medica
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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?

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. The charge nurse of a cardiac telemetry unit is assigning client care to a registered nurse (RN) and a practical nurse (PN). Which client should be assigned to the RN?

Correct answer: D

Rationale: The correct answer is D because complete heart block is a critical condition that requires immediate assessment and management by a registered nurse (RN). In complete heart block, there is a significant conduction disturbance that can lead to serious complications. The RN is better equipped to handle such complex and potentially life-threatening situations. Choices A, B, and C involve less critical conditions that can be managed by a practical nurse (PN) under the supervision of the RN. Therefore, assigning the client with complete heart block to the RN ensures prompt and appropriate intervention.

3. After receiving a report on an inpatient acute care unit, which client should the nurse assess first?

Correct answer: A

Rationale: The correct answer is A. Abdominal rigidity in a client with bowel obstruction due to a volvulus indicates possible complications and requires immediate assessment. Choice B is incorrect because although a paralytic ileus with absent bowel sounds is concerning, abdominal rigidity in a client with a volvulus takes priority. Choice C is incorrect as abdominal distention, though indicative of an obstruction, is not as urgent as the sign of abdominal rigidity. Choice D is incorrect as the drainage of greenish fluid from a nasogastric tube in a client with a small bowel obstruction, while concerning, does not present as immediate a threat as the abdominal rigidity in a client with a volvulus.

4. An IV antibiotic is prescribed for a client with a postoperative infection. The medication is to be administered in 4 divided doses. What schedule is best for administering this prescription?

Correct answer: D

Rationale: The best schedule for administering the IV antibiotic in 4 divided doses is 0800, 1200, 1600, and 2000. This timing allows for equal spacing between doses, ensuring consistent therapeutic levels of the medication in the client's system. Choice A provides doses too close together, increasing the risk of medication errors and potential toxicity. Choice B's suggestion of giving doses during waking hours is vague and lacks specific timing, which may result in irregular dosing intervals. Choice C, administering with meals and a bedtime snack, is unrelated to the timing of the antibiotic doses and does not optimize the drug's effectiveness.

5. When caring for a client with acute respiratory distress syndrome (ARDS), why does the nurse elevate the head of the bed 30 degrees?

Correct answer: A

Rationale: Elevating the head of the bed to 30 degrees is done to reduce abdominal pressure on the diaphragm, aiding in lung expansion and oxygenation. This position helps improve respiratory mechanics by allowing the diaphragm to move more effectively. Choice B is incorrect as elevating the head of the bed does not directly promote retraction of the intercostal accessory muscles of respiration. Choice C is incorrect because although elevating the head of the bed can assist with airway clearance, its primary purpose in ARDS is to decrease pressure on the diaphragm. Choice D is incorrect because reducing pressure on the medullary center is not the main goal of elevating the head of the bed; the focus is on enhancing lung function and oxygen exchange.

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