Nokea
The patient undergoes a cardiac catheterization that requires the use of contrast dyes during the procedure. To detect signs of contrast-induced kidney injury, the nurse should
- A. not be concerned unless urine output decreases.
- B. evaluate the patient’s serum creatinine for up to 72 hours after the procedure.
- C. obtain an order for a renal ultrasound.
- D. evaluate the patient’s postvoid residual volume to detect intrarenal injury.
Correct Answer: B
Rationale: Correct Answer: B
Rationale:
1. Contrast dyes can cause kidney injury due to their nephrotoxic effects.
2. Serum creatinine levels are a reliable indicator of kidney function.
3. Evaluating serum creatinine for up to 72 hours after the procedure allows detection of any contrast-induced kidney injury.
4. Monitoring serum creatinine helps in early identification and intervention for renal complications.
Summary:
A: Incorrect. Urine output alone is not a definitive indicator of kidney injury.
C: Incorrect. Renal ultrasound is not typically used for detecting contrast-induced kidney injury.
D: Incorrect. Postvoid residual volume is not specific for contrast-induced kidney injury.
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A 100-kg patient gets hemodialysis 3 days a week. In planning the care for this patient, the nurse recommends
- A. a diet of 2500 to 3500 kcal per day.
- B. protein intake of less than 50 grams per day.
- C. potassium intake of 10 mEq per day.
- D. fluid intake of less than 500 mL per day
Correct Answer: A
Rationale: The correct answer is A: a diet of 2500 to 3500 kcal per day. During hemodialysis, patients often experience increased energy expenditure due to the treatment process. Therefore, maintaining a higher caloric intake is crucial to prevent malnutrition and support the body's needs. Options B, C, and D are incorrect as limiting protein intake to less than 50 grams per day may lead to malnutrition in a patient undergoing hemodialysis, restricting potassium intake to 10 mEq per day may not be appropriate as individual needs vary, and restricting fluid intake to less than 500 mL per day can lead to dehydration and electrolyte imbalances in a patient undergoing hemodialysis.
The removal of plasma water and some low–molecular weight particles by using a pressure or osmotic gradient is known as
- A. dialysis.
- B. diffusion.
- C. clearance.
- D. ultrafiltration.
Correct Answer: D
Rationale: The correct answer is D: ultrafiltration. Ultrafiltration involves the removal of plasma water and low-molecular weight particles using a pressure or osmotic gradient. This process allows small molecules to pass through a semipermeable membrane while retaining larger molecules. Dialysis (A) involves the removal of waste products and excess fluids from the blood, while diffusion (B) is the movement of molecules from an area of high concentration to low concentration. Clearance (C) refers to the rate at which a substance is removed from the blood by a specific organ or process. Ultrafiltration specifically targets the removal of plasma water and low-molecular weight particles through a pressure or osmotic gradient, making it the correct choice in this context.
What is a minimally acceptable urine output for a patient weighing 75 kg?
- A. Less than 30 mL/hour
- B. 37 mL/hour
- C. 80 mL/hour
- D. 150 mL/hour
Correct Answer: C
Rationale: The correct answer is C (80 mL/hour) as it is considered a minimally acceptable urine output for a patient weighing 75 kg. Adequate urine output is crucial for kidney function and fluid balance. The general rule is to maintain a urine output of at least 0.5 mL/kg/hour, which in this case would be 37.5 mL/hour for a 75 kg patient. Option C (80 mL/hour) exceeds this minimum requirement, ensuring proper kidney perfusion and waste elimination. Options A (Less than 30 mL/hour) and D (150 mL/hour) are incorrect as they fall below or exceed the recommended urine output range, potentially indicating renal impairment or fluid overload, respectively. Option B (37 mL/hour) is close to the minimum requirement but does not provide a sufficient margin for variations in fluid status or kidney function.
The nurse is assigned to care for a patient who presented to the emergency department with diabetic ketoacidosis. A continuous insulin intravenous infusion is started, and hourly bedside glucose monitoring is ordered. The targeted blood glucose value after the first hour of therapy is
- A. 70 to 120 mg/dL.
- B. a decrease of 25 to 50 mg/dL compared with admitting values.
- C. a decrease of 35 to 90 mg/dL compared with admitting values.
- D. less than 200 mg/dL.
Correct Answer: C
Rationale: The correct answer is C: a decrease of 35 to 90 mg/dL compared with admitting values. In diabetic ketoacidosis, there is severe hyperglycemia which needs to be corrected gradually to prevent complications like cerebral edema. A rapid decrease in glucose levels can lead to osmotic shifts and neurological issues. The targeted decrease of 35 to 90 mg/dL is considered safe and effective in managing hyperglycemia in these patients. This range ensures a controlled reduction in blood glucose levels without causing harm.
Choice A (70 to 120 mg/dL) is too broad and may lead to overly aggressive treatment. Choice B (a decrease of 25 to 50 mg/dL) is too conservative and may not adequately address the high glucose levels seen in diabetic ketoacidosis. Choice D (less than 200 mg/dL) does not provide a specific target range for glucose reduction, which is essential in managing diabetic ketoacidosis effectively.
The patient has just returned from having an arteriovenous fistula placed. The patient asks, “When will they be able to use this and take this other catheter out?” The nurse should reply,
- A. “It can be used immediately, so the catheter can come out anytime.”
- B. “It will take 2 to 4 weeks to heal before it can be used.”
- C. “The fistula will be usable in about 4 to 6 weeks.”
- D. “The fistula was made using graft material, so it depends on the manufacturer.”
Correct Answer: C
Rationale: The correct answer is C: “The fistula will be usable in about 4 to 6 weeks.” This is because arteriovenous fistulas typically require a maturation period of 4 to 6 weeks before they can be used for dialysis. During this time, the fistula will develop into a strong, durable access point for hemodialysis.
Choice A is incorrect because the fistula needs time to mature before it can be used, and immediate use may damage it. Choice B is incorrect as it underestimates the maturation period required. Choice D is incorrect as the maturation time does not depend on the manufacturer but on the patient's physiology and healing process.