A nurse is providing care for a client who has hypervolemia, ketoacidosis, and metabolic acidosis. Which of the following lab values should the nurse be concerned about?
Serum potassium levels
Serum calcium levels
Serum sodium levels
Blood urea nitrogen (BUN)
The Correct Answer is A
The correct answer is a) Serum potassium levels.
Choice A reason:
Serum potassium levels are crucial to monitor in clients with hypervolemia, ketoacidosis, and metabolic acidosis. Potassium imbalances are common in these conditions due to shifts between intracellular and extracellular compartments. In diabetic ketoacidosis (DKA), for example, insulin deficiency and acidosis cause potassium to move out of cells, leading to hyperkalemia. However, once treatment with insulin begins, potassium shifts back into cells, which can cause hypokalemia. Both hyperkalemia and hypokalemia can have serious cardiac implications, making it essential to monitor and manage potassium levels closely.
Choice B reason:
Serum calcium levels are important for overall health, but they are not the primary concern in the context of hypervolemia, ketoacidosis, and metabolic acidosis. While calcium imbalances can occur, they are less common and less immediately life-threatening compared to potassium imbalances. Monitoring calcium is still necessary, but it does not require the same level of immediate intervention.
Choice C reason:
Serum sodium levels are also important to monitor, especially in conditions like hypervolemia where fluid balance is disrupted. However, sodium imbalances are typically managed through fluid management and do not pose the same immediate risk as potassium imbalances in the context of ketoacidosis and metabolic acidosis. Hyponatremia or hypernatremia can cause neurological symptoms, but these are generally less acute compared to the cardiac risks associated with potassium imbalances.
Choice D reason:
Blood urea nitrogen (BUN) levels provide information about kidney function and hydration status. Elevated BUN can indicate dehydration or renal impairment, which are relevant in the context of hypervolemia and ketoacidosis. However, BUN levels do not require the same level of immediate intervention as potassium levels. Monitoring BUN is important for overall management but is not the primary concern in acute settings.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["D"]
Explanation
Choice A Reason:
A urine specific gravity of 1.010 falls within the normal range of 1.005 to 1.0301. This value does not indicate hyponatremia. In SIADH, urine is often more concentrated due to the retention of water, leading to higher specific gravity values.
Choice B Reason:
Respiratory alkalosis is not a typical manifestation of hyponatremia. It is usually associated with conditions that cause hyperventilation, such as anxiety or high altitude. SIADH typically does not cause respiratory alkalosis.
Choice C Reason:
Diarrhea is not a direct manifestation of hyponatremia. While diarrhea can lead to electrolyte imbalances, including hyponatremia, it is not a symptom caused by SIADH5. SIADH leads to water retention and dilutional hyponatremia, not diarrhea.
Choice D Reason:
Diminished reflexes are a manifestation of hyponatremia. Low sodium levels affect neuromuscular function, leading to symptoms such as muscle weakness, cramps, and diminished reflexes7. This is a direct result of the electrolyte imbalance caused by SIADH.
Correct Answer is C
Explanation
Choice A reason:
A serum potassium level of 5.0 mEq/L is within the normal range (3.5-5.0 mEq/L). While it is on the higher end of normal, it does not require immediate intervention in the context of SIADH. Potassium levels are crucial for cardiac and muscle function, but this value does not indicate a critical imbalance.
Choice B reason:
A serum calcium level of 8.0 mg/dL is slightly below the normal range (8.5-10.2 mg/dL). Mild hypocalcemia can occur in various conditions, but it is not typically associated with SIADH and does not require immediate intervention unless symptomatic or significantly lower.
Choice C reason:
A serum sodium level of 125 mEq/L indicates hyponatremia, which is a hallmark of SIADH. Hyponatremia can lead to severe neurological symptoms, including seizures, confusion, and coma, especially if it develops rapidly. Immediate intervention is required to correct the sodium imbalance and prevent serious complications.
Choice D reason:
A blood urea nitrogen (BUN) level of 24 mg/dL is within the upper normal range (7-20 mg/dL). While slightly elevated, it is not critically high and does not require immediate intervention in the context of SIADH. BUN levels can be influenced by various factors, including hydration status and renal function.
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