An elderly female patient has presented to the emergency department with altered mental status, hypothermia, and clinical signs of heart failure. Myxedema is suspected. Which of the following laboratory findings support this diagnosis?

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Question 1 of 9

An elderly female patient has presented to the emergency department with altered mental status, hypothermia, and clinical signs of heart failure. Myxedema is suspected. Which of the following laboratory findings support this diagnosis?

Correct Answer: C

Rationale: Rationale for Correct Answer (C): Elevated T and T3/T4 levels are indicative of primary hypothyroidism, such as myxedema. In this case, the patient presents with classic symptoms of hypothyroidism, including altered mental status, hypothermia, and heart failure. Elevated T3/T4 levels confirm the diagnosis. Summary of Incorrect Choices: A: Elevated adrenocorticotropic hormone is associated with adrenal disorders, not hypothyroidism. B: Elevated cortisol levels suggest Cushing's syndrome, a condition of excess cortisol production, not hypothyroidism. D: Elevated thyroid-stimulating hormone is seen in primary hypothyroidism, but in myxedema, the issue is not with TSH but with T3/T4 levels.

Question 2 of 9

The patient is diagnosed with acute kidney injury and has been getting dialysis 3 days per week. The patient complains of general malaise and is tachypneic. An arterial blood gas shows that the patient’s pH is 19, with a PCO of 30 mm Hg and a bicarbonate level of 13 mEq/L. The nurse prepares to

Correct Answer: B

Rationale: The correct answer is B: prepare for intubation and mechanical ventilation. The patient's arterial blood gas results indicate metabolic acidosis (low pH, low bicarbonate) with respiratory compensation (low PCO). In this scenario, the patient is likely experiencing respiratory fatigue due to tachypnea from metabolic acidosis. Intubation and mechanical ventilation are needed to support the patient's respiratory effort and correct the acid-base imbalance. Administering morphine (choice A) can further depress the respiratory drive. Administering intravenous sodium bicarbonate (choice C) can temporarily correct the pH but does not address the underlying respiratory distress. Canceling dialysis (choice D) is not indicated as it does not address the acute respiratory compromise.

Question 3 of 9

The nurse is assessing a patient with a new arteriovenous fistula, but does not hear a bruit or feel a thrill. Pulses distal to the fistula are not palpable. The nurse should

Correct Answer: C

Rationale: The correct answer is C: notify the provider immediately. Lack of bruit, thrill, and distal pulse indicates potential complications like thrombosis or occlusion in the arteriovenous fistula. Prompt provider notification is crucial for timely intervention to prevent further complications such as ischemia or access failure. Reassessing the patient in an hour (A) may delay necessary intervention. Raising the arm above the level of the patient's heart (B) does not address the underlying issue. Applying warm packs (D) could worsen the situation if there is a clot present.

Question 4 of 9

In determining the glomerular filtration rate (GFR) or creatinine clearance, a 24-hour urine is obtained. If a reliable 24-hour urine collection is not possible,

Correct Answer: D

Rationale: The correct answer is D because if a reliable 24-hour urine collection is not possible, a standardized formula can be used to estimate the GFR. This is typically done using the patient's serum creatinine level, age, sex, and race. It is a validated method when direct measurement is not feasible. A: Incorrect. It is still possible to estimate GFR using formulas when 24-hour urine collection is not possible. B: Incorrect. BUN alone is not sufficient to accurately determine renal function. C: Incorrect. BUN/Creatinine ratio is not a direct measure of GFR and may be influenced by other factors.

Question 5 of 9

An advantage of peritoneal dialysis is that

Correct Answer: B

Rationale: The correct answer is B: a decreased risk of peritonitis exists. Peritoneal dialysis involves using the peritoneum as a membrane for fluid exchange, reducing the risk of infections like peritonitis compared to hemodialysis. Option A is incorrect as peritoneal dialysis can be done at home and is less time-consuming than hemodialysis. Option C is incorrect as biochemical disturbances are corrected more gradually with peritoneal dialysis. Option D is incorrect as there is a risk of bleeding complications with peritoneal dialysis.

Question 6 of 9

An elderly female patient has presented to the emergency department with altered mental status, hypothermia, and clinical signs of heart failure. Myxedema is suspected. Which of the following laboratory findings support this diagnosis?

Correct Answer: C

Rationale: Rationale for Correct Answer (C): Elevated T and T3/T4 levels are indicative of primary hypothyroidism, such as myxedema. In this case, the patient presents with classic symptoms of hypothyroidism, including altered mental status, hypothermia, and heart failure. Elevated T3/T4 levels confirm the diagnosis. Summary of Incorrect Choices: A: Elevated adrenocorticotropic hormone is associated with adrenal disorders, not hypothyroidism. B: Elevated cortisol levels suggest Cushing's syndrome, a condition of excess cortisol production, not hypothyroidism. D: Elevated thyroid-stimulating hormone is seen in primary hypothyroidism, but in myxedema, the issue is not with TSH but with T3/T4 levels.

Question 7 of 9

The most common cause of acute kidney injury in critically ill patients is

Correct Answer: A

Rationale: The correct answer is A: sepsis. Sepsis is a leading cause of acute kidney injury in critically ill patients due to the systemic inflammatory response leading to kidney damage. Fluid overload (B) can contribute but is not the primary cause. Medications (C) and hemodynamic instability (D) can also lead to acute kidney injury but are not as common as sepsis in critically ill patients.

Question 8 of 9

The nurse is caring for a patient who underwent pituitary surgery 12 hours ago. The nurse will give priority to monitoring the patient carefully for which of the following?

Correct Answer: B

Rationale: The correct answer is B: Hypovolemic shock. After pituitary surgery, patients are at risk for hypovolemic shock due to potential intraoperative blood loss and fluid shifts. Monitoring for signs of shock, such as hypotension and tachycardia, is crucial for early intervention. A: Congestive heart failure is less likely immediately post-surgery. C: Infection is a concern but not the highest priority in the immediate postoperative period. D: Volume overload is not a common immediate complication of pituitary surgery.

Question 9 of 9

The nurse has been assigned the following patients. Which patients require assessment of blood glucose control as a nursing priority? (Select all that apply.)

Correct Answer: C

Rationale: The correct answer is C because the patient with acute pancreatitis receiving TPN is at risk for hyperglycemia due to the high glucose content in TPN. Monitoring blood glucose levels is crucial to prevent complications. Explanation for why other choices are incorrect: A: The 18-year-old male post-surgery for a fractured femur does not have a direct correlation to blood glucose control assessment. B: The 29-year-old female undergoing evaluation for pheochromocytoma is not directly related to blood glucose control assessment. D: The 62-year-old morbidly obese female post-hysterectomy for ovarian cancer does not specifically require immediate blood glucose control assessment.

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