Correct Answer: B

Rationale: The correct answer is B: azotemia. Azotemia refers to an increase in BUN and serum creatinine levels, indicating impaired kidney function. Oliguria (A) is a decrease in urine output, not specific to BUN and creatinine levels. Acute kidney injury (C) is a broader term encompassing various causes of kidney dysfunction, not specific to elevated BUN and creatinine. Prerenal disease (D) refers to conditions affecting blood flow to the kidneys, not directly related to elevated BUN and creatinine levels.

Correct Answer: D

Rationale: The presence of a bruit over the thyroid indicates increased blood flow, characteristic of hyperthyroidism. This excess blood flow is due to the hypermetabolic state in hyperthyroidism, leading to turbulent blood flow and the audible bruit. A bruit is not typically associated with hypothyroidism, thyroid cysts, or thyroid cancer, as these conditions do not cause increased blood flow. Therefore, the correct interpretation is hyperthyroidism.

Correct Answer: C

Rationale: The correct answer is C: Primary nursing. Primary nursing is a care delivery model where one nurse is responsible for the total care of a group of clients over a 24-hour period. This promotes continuity of care, individualized attention, and better nurse-client relationships. In primary nursing, the nurse plans and directs care, coordinates with other healthcare team members, and serves as the main point of contact for the clients. A: Case management involves coordinating care across different healthcare providers and services, not necessarily focusing on a specific group of clients over a 24-hour period. B: Team nursing involves a team of healthcare providers working together to deliver care, rather than one nurse being responsible for a specific group of clients over a 24-hour period. D: Functional nursing divides tasks among different healthcare team members based on their specific skills, which may not provide the same level of continuity and individualized care as primary nursing.

Correct Answer: A

Rationale: The correct answer is A. Infants typically have higher resting heart rates than adults, so a pulse rate of 89 beats/minute for an infant may indicate bradycardia. Digoxin can further lower the heart rate, leading to potential adverse effects like arrhythmias. Therefore, withholding the medication and contacting the healthcare provider is crucial to ensure the safety of the infant. Choice B is incorrect because administering digoxin without addressing the elevated pulse rate can be dangerous. Choice C is incorrect as assessing respiratory rate does not address the immediate concern of the elevated pulse rate. Choice D is also incorrect as waiting and giving half of the dosage may further exacerbate the situation.

Correct Answer: D

Rationale: The correct answer is D: Assess and intervene for causes of agitation. In a critically ill patient, agitation while intubated could indicate underlying issues like pain, delirium, or inadequate sedation. By assessing and addressing the root cause of agitation, the nurse can improve patient comfort and prevent potential harm from restraints. Removing restraints periodically for skin integrity (B) and range of motion (C) is important but should not be the primary focus when agitation is present. Maintaining restraints (A) without addressing the agitation could lead to increased distress and potential complications.