A nurse is assessing a client who has a serum sodium level of 120 mEq/L. Which of the following findings should the nurse expect?
A.
Decreased bowel sounds
B.
Increased central venous pressure
C.
Confusion
D.
Hyperreflexia
The Correct Answer and Explanation is :
The correct answer is C. Confusion.
Explanation:
A serum sodium level of 120 mEq/L indicates hyponatremia, which is a condition where the sodium level in the blood is abnormally low. Sodium is a crucial electrolyte that helps maintain fluid balance, nerve function, and muscle function. When sodium levels drop below normal, it can disrupt these functions, particularly affecting the brain, because neurons are sensitive to changes in electrolyte levels.
1. Neurological Symptoms:
One of the primary symptoms of hyponatremia is neurological impairment. Sodium plays a vital role in maintaining the osmotic balance between the intracellular and extracellular environments. When sodium levels fall, it can cause water to move into the cells, including brain cells, leading to cellular swelling. This swelling can increase intracranial pressure and interfere with brain function. As a result, clients with severe hyponatremia often present with confusion, irritability, and changes in mental status.
2. Other Symptoms and Findings:
- Decreased bowel sounds (Option A): Hyponatremia is not typically associated with decreased bowel sounds. Bowel sounds may change due to other conditions such as gastrointestinal issues or electrolyte imbalances affecting the gastrointestinal tract differently, but it is not a direct symptom of hyponatremia.
- Increased central venous pressure (Option B): Central venous pressure (CVP) is more relevant to assessing fluid status and heart function rather than sodium levels. While hyponatremia can sometimes be associated with fluid overload or depletion, it does not specifically cause increased CVP. CVP changes are more likely related to heart failure or fluid volume status rather than sodium levels alone.
- Hyperreflexia (Option D): Hyperreflexia, or increased reflexes, is typically associated with hypernatremia (high sodium levels) rather than hyponatremia. In cases of hyponatremia, clients may present with diminished reflexes or muscle weakness rather than increased reflexes.
In summary, the primary finding associated with a serum sodium level of 120 mEq/L is confusion due to the effects of hyponatremia on brain function. This confusion is a direct consequence of the electrolyte imbalance affecting neural activity and fluid balance within the brain.