A client has a serum sodium level of 122 mEq/L (normal 135-145). Which assessment finding would the nurse expect with this level of hyponatremia?

HYPONATREMIA (low sodium, <135 mEq/L): 122 mEq/L is significantly low. NEUROLOGICAL EFFECTS DOMINATE: Sodium imbalances primarily affect the brain because water shifts based on sodium concentration; LOW SODIUM = water moves INTO cells (including brain cells) = cerebral edema; SYMPTOMS by severity: Mild: headache, nausea, malaise; Moderate: confusion, lethargy, muscle weakness, disorientation; Severe (<120): seizures, coma, respiratory arrest, death; CAUSES: SIADH, excessive water intake, diuretics, heart failure, vomiting/diarrhea with water replacement; TREATMENT: Depends on cause and severity — fluid restriction (if dilutional), careful sodium replacement (hypertonic saline for severe symptomatic cases — corrected SLOWLY to avoid osmotic demyelination syndrome); SAFETY: Seizure precautions for severe hyponatremia; LPN role: monitor neuro status, report changes, implement safety measures.