Nokea
The patient has elevated blood urea nitrogen (BUN) and serum creatinine levels with a normal BUN/creatinine ratio. These levels most likely indicate
- A. increased nitrogen intake.
- B. acute kidney injury, such as acute tubular necrosis (ATN).
- C. hypovolemia.
- D. fluid resuscitation.
Correct Answer: B
Rationale: The elevated BUN and serum creatinine levels with a normal BUN/creatinine ratio suggest kidney dysfunction. This pattern is commonly seen in acute kidney injury, like acute tubular necrosis (ATN), where the kidneys are unable to properly filter waste products. Other choices (A) increased nitrogen intake and (C) hypovolemia would not cause the specific pattern of elevated BUN and creatinine levels with a normal ratio. (D) Fluid resuscitation would actually aim to correct hypovolemia and would not directly affect the BUN and creatinine levels.
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A patient presents to the emergency department with the following clinical signs: Pulse: 132 beats/min Blood pressure: 88/50 mm Hg Respiratory rate: 32 breaths/min Temperature: 8°F Chest x-ray: Findings consistent with congestive heart failure Cardiac rhythm: Atrial fibrillation with rapid ventricular response These signs are consistent with which disorder?
- A. Adrenal crisis
- B. Myxedema coma
- C. Syndrome of inappropriate secretion of antidiuretic hormone (SIADH)
- D. Thyroid storm
Correct Answer: D
Rationale: Rationale: The clinical signs indicate a hypermetabolic state with tachycardia, hypotension, tachypnea, and potential fever, typical of a thyroid storm. The presence of congestive heart failure and atrial fibrillation further support this diagnosis due to the hyperthyroid state exacerbating cardiovascular symptoms. Adrenal crisis (A) would present with hypotension and shock, but not with the hypermetabolic state seen here. Myxedema coma (B) would present with hypothermia, bradycardia, and altered mental status, which are not present in this case. SIADH (C) would typically present with hyponatremia and concentrated urine, which are not seen here.
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.
In calculating the glomerular filtration rate (GFR) results for women, the creatinine clearance is usually:
- A. the same as for men.
- B. greater than that for men.
- C. multiplied by 0.85.
- D. multiplied by 1.15.
Correct Answer: A
Rationale: The correct answer is A: the same as for men. GFR is calculated based on factors like age, weight, and serum creatinine levels, which are not directly influenced by gender. Therefore, the creatinine clearance for women is the same as for men. Choices B, C, and D are incorrect because there is no inherent biological difference between men and women that would cause a difference in creatinine clearance for GFR calculation.
The nurse is caring for a patient receiving peritoneal dialysis. The patient suddenly complains of abdominal pain and chills. The patient’s temperature is elevated. The nurse should
- A. assess peritoneal dialysate return.
- B. check the patient’s blood sugar.
- C. evaluate the patient’s neurological status.
- D. inform the provider of probable visceral perforation.
Correct Answer: D
Rationale: The correct answer is D: inform the provider of probable visceral perforation. This is the most urgent action as sudden abdominal pain, chills, and elevated temperature in a patient receiving peritoneal dialysis could indicate a serious complication like visceral perforation, which requires immediate medical attention to prevent further complications. Assessing peritoneal dialysate return (A) may provide some information but does not address the urgent need to address a potential visceral perforation. Checking the patient's blood sugar (B) and evaluating the patient's neurological status (C) are not priorities in this situation and do not address the potential life-threatening complication of visceral perforation.
A patient is admitted to the oncology unit with a small-cell lung carcinoma. During the admission, the patient is noted to have a significant decrease in urine output accompanied by shortness of breath, edema, and mental status changes. The nurse is aware that this clinical presentation is consistent with
- A. adrenal crisis.
- B. diabetes insipidus.
- C. myxedema coma.
- D. syndrome of inappropriate secretion of antidiuretic hormone (SIADH).
Correct Answer: D
Rationale: The correct answer is D: syndrome of inappropriate secretion of antidiuretic hormone (SIADH). In this scenario, the patient's symptoms of decreased urine output, shortness of breath, edema, and mental status changes are indicative of fluid overload due to SIADH. SIADH causes excessive release of antidiuretic hormone (ADH), leading to water retention and dilutional hyponatremia. This results in edema, decreased urine output, and neurological symptoms.
A: Adrenal crisis presents with hypotension, shock, and electrolyte abnormalities, not consistent with the patient's symptoms.
B: Diabetes insipidus would present with excessive urine output and thirst, opposite of the patient's symptoms.
C: Myxedema coma results from severe hypothyroidism and presents with hypothermia, bradycardia, and altered mental status, not consistent with the patient's symptoms.
In summary, the patient's clinical presentation aligns