Dialysis Disequilibrium Syndrome Induced Seizure Following Hemodialysis

Dialysis Disequilibrium Syndrome: A Red Flag to Check Post Hemodialysis

Dialysis disequilibrium syndrome (DDS) is a neurological disorder with varying severity which is primarily caused by the rapid removal of urea during hemodialysis, which was first described in the literature in 1962. Common risk factors are extreme age, high blood urea nitrogen, sudden change in dialysis regimen, presence of other conditions causing cerebral edema, preexisting neurological diseases, and increased permeability of the blood-brain barrier. Understanding these risk factors and preventing the syndrome is crucial as no specific treatment guideline has been established yet. In this case report, we are presenting a case with a conglomeration of clinical attributes suggesting DDS.

Dialysis Disequilibrium: Is Acidosis More Important than Urea?

Dialysis disequilibrium syndrome is a severe complication associated with dialysis treatment. Manifestations may range from mild such as headache to severe such as seizures and coma. Risk factors for development include initial dialysis treatment, uraemia, metabolic acidosis, and extremes of age. We report a case of dialysis disequilibrium in a patient with a failing kidney transplant secondary to the recurrence of IgA nephropathy. Disturbance in cognition and neurologic functioning occurred six hours after the completion of initiation of intermittent haemodialysis. During two sessions of intermittent haemodialysis of 3 and 4 hours, urea was reduced by 21.9 and 17.2 mmol/L and measured serum osmolality was reduced by 25 and 14 mOsm/kg, respectively. Subsequent admission to the intensive care unit and initiation of continuous renal replacement therapy for 48 hours resulted in complete resolution of symptoms. In this case report, we discuss atypical clinical and radiologic features of dialysis disequilibrium occurring with modest reductions in urea and serum osmolality.