Hyponatremia in tube-fed elderly men.

Area of Science:

• Geriatric Medicine
• Nephrology
• Clinical Nutrition

Background:

• Hyponatremia is common in extended care facilities, often linked to medications or hormonal imbalances.
• Patients with organic brain syndrome receiving gastrostomy tube feeding are susceptible to electrolyte disturbances.

Purpose of the Study:

• To investigate the cause of intermittent hyponatremia in male patients with organic brain syndrome on gastrostomy tube feeding.
• To determine the relationship between sodium intake and serum sodium levels in this patient population.

Main Methods:

• A chart review was conducted on 15 male patients with organic brain syndrome.
• Serum sodium levels were analyzed in relation to three different dietary sodium intake levels: 1 g/day, 2 g/day, and 3-6 g/day.
• Patients' medical history, medications, and co-morbidities were reviewed.

Main Results:

• Serum sodium levels were directly correlated with sodium intake.
• Hyponatremia (serum Na < 135 mEq/l) occurred in 40% of samples during the lowest sodium diet (1 g/day) and in 14% at < 130 mEq/l.
• Increasing sodium intake from 1 g/day to 2 g/day normalized serum sodium in hyponatremic patients without adverse effects.

Conclusions:

• Inadequate sodium content in specialized tube feeding formulas can lead to hyponatremia in patients with organic brain syndrome.
• Dietary sodium supplementation is an effective strategy to correct and prevent hyponatremia in this vulnerable patient group.
• Further research should focus on optimizing electrolyte content in enteral nutrition for patients with cognitive impairment.