Correct Answer: B

Rationale: The correct answer is B because a mechanically ventilated patient with cardiogenic shock being treated with an intra-aortic balloon pump would benefit most from having a Vigileo pulse contour cardiac output monitoring system. This device provides continuous cardiac output monitoring and can help guide hemodynamic management in critically ill patients, especially those with hemodynamic instability like cardiogenic shock. It allows for real-time adjustments of fluid and vasoactive medications to optimize cardiac output and tissue perfusion. Choice A is incorrect because a patient with a history of aortic insufficiency and postoperative myocardial infarction may not require continuous cardiac output monitoring like the patient in choice B. Choice C is incorrect as the patient with atrial fibrillation and paroxysmal supraventricular tachycardia does not necessarily need cardiac output monitoring. Choice D is also incorrect as a mechanically ventilated patient following repair of an acute bowel obstruction may not require continuous cardiac output monitoring unless there are specific complications.

Correct Answer: A

Rationale: Step 1: Symptoms of weight loss, racing heart rate, and difficulty sleeping are common in hyperthyroidism. Step 2: Presence of moist skin, fine hair, prominent eyes, lid retraction, and staring expression are classic signs of Grave's disease, a type of hyperthyroidism. Step 3: Grave's disease is an autoimmune disorder where the thyroid gland is overactive, leading to excessive production of thyroid hormones. Step 4: Excess thyroid hormones increase metabolic rate, causing weight loss, racing heart rate, and insomnia. Step 5: Therefore, the findings described in the question are consistent with Grave's disease.

Correct Answer: B

Rationale: The correct answer is B because it acknowledges the partner's feelings while providing information that may help them cope. By stating that unresponsiveness doesn't mean the patient can't hear, the nurse highlights the importance of the partner's presence for emotional support. It encourages the partner to continue visiting, emphasizing their role in providing comfort to the patient. Choice A is incorrect as it dismisses the partner's feelings and lacks empathy. Choice C is incorrect as it implies the nurse will only involve the partner if the patient responds, neglecting the partner's emotional needs. Choice D is incorrect as it deflects responsibility from addressing the partner's concerns and suggests involving other family members without addressing the partner's feelings directly.

Correct Answer: B

Rationale: The correct answer is B (80 to 125 mL/min) because this range reflects the normal glomerular filtration rate (GFR) in adults. GFR measures the rate at which blood is filtered by the kidneys, typically around 125 mL/min. A GFR below 60 mL/min indicates kidney dysfunction, making option A incorrect. Option C (125 to 180 mL/min) is above the normal range. Option D (more than 189 mL/min) is too high and could indicate hyperfiltration, common in conditions like diabetes. Therefore, choice B is the most appropriate within the normal GFR range.

Correct Answer: B

Rationale: The correct answer is B: Discontinue the catheter and culture the tip. The patient's symptoms indicate a possible catheter-related infection. Discontinuing the catheter will prevent further infection spread. Culturing the tip will identify the specific pathogen causing the infection, guiding appropriate antibiotic therapy. Choice A is incorrect because giving analgesics alone will not address the underlying infection. Choice C is incorrect as changing the flush system is not a priority when infection is suspected. Choice D is incorrect as checking the site more frequently does not address the need for immediate action to address the infection.