Extreme hyperglycemia in dialysis patients

Area of Science:

• Nephrology
• Endocrinology
• Neurology

Background:

• Diabetic patients undergoing dialysis are at risk for metabolic complications.
• Extremely elevated serum glucose levels can typically cause severe neurological deficits due to hyperosmolality.

Purpose of the Study:

• To investigate the neurological status of diabetic patients on dialysis with markedly elevated serum glucose.
• To explore the factors preventing neurological impairment in these patients.

Main Methods:

• Study included 12 diabetic patients on maintenance hemodialysis or peritoneal dialysis.
• Serum glucose, sodium, total osmolality, and effective osmolality were measured.
• Neurological deficits were assessed clinically.

Main Results:

• Patients presented with extremely elevated mean serum glucose levels (1,174 +/- 248 mg/100 ml).
• Despite high glucose, no coma or neurologic deficits were observed.
• Mean serum sodium was 125 +/- 5 mEq/l, total osmolality 342 +/- 13 mOsm/kg water, and effective osmolality 316 +/- 13 mOsm/kg water.

Conclusions:

• The absence of significant osmotic diuresis and ultrafiltration likely prevented hypernatremia and severe hyperosmolality.
• The osmolar effect of glucose alone may not be sufficient to induce neurological impairment in this specific patient population.
• Dialysis modality may play a protective role against glucose-induced neurological complications in diabetic patients.