A patient with a history of type 1 diabetes and an eating disorder is found unconscious. In the emergency department, the following lab values are obtained: Glucose: 648 mg/dL pH: 88 P CO : 20 mm Hg a 2 P O : 95 mm Hg a 2 HCO ¯: undetectable Anion gap: >31 Na+: 127 mEq/L K+: 5 mEq/L Creatinine: 8 mg/dL After the patient’s airway and ventilation have been established, the next priority for this patient is:

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Question 1 of 9

A patient with a history of type 1 diabetes and an eating disorder is found unconscious. In the emergency department, the following lab values are obtained: Glucose: 648 mg/dL pH: 88 P CO : 20 mm Hg a 2 P O : 95 mm Hg a 2 HCO ¯: undetectable Anion gap: >31 Na+: 127 mEq/L K+: 5 mEq/L Creatinine: 8 mg/dL After the patient’s airway and ventilation have been established, the next priority for this patient is:

Correct Answer: A

Rationale: The correct answer is A: administration of a 1-L normal saline fluid bolus. In this scenario, the patient is likely experiencing diabetic ketoacidosis (DKA) due to the extremely high glucose levels, low bicarbonate, and anion gap metabolic acidosis. The priority is to correct the dehydration and electrolyte imbalances through fluid resuscitation with normal saline to improve perfusion and reverse the metabolic derangements. Options B, C, and D do not address the immediate need for volume resuscitation and correction of dehydration. Administering insulin or potassium without first addressing the fluid deficit could lead to further complications. Sodium bicarbonate is not recommended in DKA as it can worsen acidosis and has not been shown to improve outcomes.

Question 2 of 9

The patient is admitted with acute kidney injury from a postrenal cause. Acceptable treatments for that diagnosis include: (Select all that apply.)

Correct Answer: A

Rationale: The correct answer is A. Bladder catheterization helps relieve urinary obstruction, a common postrenal cause of acute kidney injury. It allows urine to drain freely from the bladder. - B: Increasing fluid volume intake may worsen the condition by increasing the pressure on the obstructed kidneys. - C: Ureteral stenting is used for intrarenal causes, not postrenal causes. - D: Placement of nephrostomy tubes bypasses the obstruction but is usually reserved for more severe cases.

Question 3 of 9

The term used to describe an increase in blood urea nitrogen (BUN) and serum creatinine is

Correct Answer: B

Rationale: The correct answer is B: azotemia. Azotemia refers to elevated levels of nitrogenous waste products like BUN and creatinine in the blood. This occurs when the kidneys are not functioning properly, leading to decreased filtration and excretion of waste products. Oliguria (A) is reduced urine output, not specific to elevated BUN and creatinine levels. Acute kidney injury (C) is a broader term for sudden loss of kidney function. Prerenal disease (D) typically refers to conditions affecting blood flow to the kidneys, leading to decreased kidney function, but it does not specifically describe the increase in BUN and creatinine levels.

Question 4 of 9

The nurse is caring for a patient who suffered a head trauma following a fall. The patient’s heart rate is 112 beats/min and blood pressure is 88/50 mm Hg. The patient has poor skin turgor and dry mucous membranes. The patient is confused and restless. The following laboratory values are reported: serum sodium is 115 mEq/L; blood urea nitrogen (BUN) 50 mg/dL; and creatinine 8 mg/dL. The findings are consistent with which disorder?

Correct Answer: A

Rationale: The correct answer is A: Cerebral salt wasting. This is indicated by the low serum sodium level (115 mEq/L), which can occur in patients with head trauma and lead to excessive sodium loss through the kidneys. This results in hypovolemia, leading to low blood pressure and tachycardia. The elevated BUN (50 mg/dL) and creatinine (8 mg/dL) levels suggest dehydration and renal impairment due to volume depletion. The patient's poor skin turgor, dry mucous membranes, confusion, and restlessness further support the diagnosis of cerebral salt wasting. Summary: B: Diabetes insipidus is characterized by excessive urination and thirst due to insufficient production of antidiuretic hormone (ADH). This patient's symptoms are not consistent with diabetes insipidus. C: Syndrome of inappropriate secretion of antidiuretic hormone (SIADH) is characterized by excessive release of ADH, leading to water retention and

Question 5 of 9

The patient’s potassium level is 0 mEq/L. Besides dialysis, which of the following actually reduces plasma potassium levels and total body potassium content safely in a patient with renal dysfunction?

Correct Answer: A

Rationale: The correct answer is A: Sodium polystyrene sulfonate. It works by exchanging sodium ions for potassium ions in the colon, leading to potassium excretion. A is the safest option without the risk of causing hypernatremia or intestinal necrosis like B. Regular insulin (C) may cause hypoglycemia and is not as effective as A in reducing potassium levels. Calcium gluconate (D) does not directly reduce potassium levels and is used for treating hyperkalemia-related cardiac toxicity.

Question 6 of 9

Which of the following laboratory values would be more common in patients with diabetic ketoacidosis?

Correct Answer: A

Rationale: The correct answer is A (Blood glucose >1000 mg/dL) because diabetic ketoacidosis is characterized by severe hyperglycemia. High blood glucose levels (>1000 mg/dL) are common due to insulin deficiency leading to increased glucose production. B: Negative ketones in the urine would be incorrect as DKA results in ketone production, leading to ketonuria. C: Normal anion gap would be incorrect as DKA typically presents with an elevated anion gap metabolic acidosis due to ketone accumulation. D: pH 7.24 would be incorrect as DKA would present with a lower pH due to metabolic acidosis.

Question 7 of 9

Complications common to patients receiving hemodialysis for acute kidney injury include which of the following? (Select all that apply.)

Correct Answer: A

Rationale: The correct answer is A: Hypotension. Hemodialysis can lead to hypotension due to rapid fluid removal, causing a drop in blood pressure. This occurs as the dialysis machine removes excess fluid, affecting plasma volume. Hypotension can result in complications like dizziness, nausea, and potential cardiac issues. Dysrhythmias (B) are less common during hemodialysis for acute kidney injury. Muscle cramps (C) may occur due to electrolyte imbalances but are not as common as hypotension. Hemolysis (D) is not a common complication of hemodialysis but can occur if there are issues with the dialysis machine or blood tubing.

Question 8 of 9

The nurse is caring for a patient with acute kidney injury who is being treated with hemodialysis. The patient asks if he will need dialysis for the rest of his life. Which of the following would be the best response?

Correct Answer: D

Rationale: The correct answer is D: “Recovery is possible, but it may take several months.” This response is the best because acute kidney injury can be reversible with appropriate management, and recovery may take time. It is important to provide hope and encouragement to the patient. A: “Unfortunately, kidney injury is not reversible; it is permanent.” - This is incorrect as acute kidney injury can be reversible with timely intervention and proper treatment. B: “Kidney function usually returns within 2 weeks.” - This is incorrect because the recovery timeline varies for each individual and can take longer than 2 weeks. C: “You will know for sure if you start urinating a lot all at once.” - This is incorrect as increased urine output may not always indicate complete recovery from acute kidney injury.

Question 9 of 9

The patient’s serum creatinine level is 7 mg/dL. The expected BUN level should be

Correct Answer: C

Rationale: The correct answer is C (10 to 20 mg/dL). In conditions where the serum creatinine level is elevated (7 mg/dL in this case), the BUN level is expected to also be elevated due to impaired kidney function. BUN levels are typically around 10-20 mg/dL, so this range is the most appropriate given the elevated creatinine level. Choice A (1 to 2 mg/dL) is too low and would not be expected with a creatinine level of 7 mg/dL. Choice B (7 to 14 mg/dL) is a bit low for such a high creatinine level. Choice D (20 to 30 mg/dL) is too high as it exceeds the typical range for BUN levels. Therefore, choice C is the most appropriate range based on the given information.

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