Initiating Dialysis with a Low and Slow Approach

Physiological Rationale

The American Journal of Kidney Diseases recommends that the first dialysis treatment should be initiated at a low dose and progressed slowly to minimize the risk of dialysis disequilibrium syndrome, hemodynamic instability, and other complications in patients new to dialysis 1
When patients begin dialysis, their bodies have adapted to high levels of uremic toxins, and rapid removal can cause significant physiological disturbances, as noted by the American Journal of Kidney Diseases 1, 2
Starting with a lower dialysis dose allows for gradual adaptation of the body to the removal of uremic toxins, preventing rapid shifts in electrolytes, osmolality, and fluid status, according to the American Journal of Kidney Diseases 2

Rapid removal of urea creates an osmotic gradient between the brain and blood, leading to cerebral edema, as reported by the American Journal of Kidney Diseases 3
Symptoms of dialysis disequilibrium syndrome include headache, nausea, vomiting, restlessness, seizures, and in severe cases, coma, according to the American Journal of Kidney Diseases 3
The risk of dialysis disequilibrium syndrome is highest in patients with very high BUN levels at dialysis initiation, as noted by the American Journal of Kidney Diseases 3

Rapid fluid removal can cause hypotension, especially in patients with cardiovascular comorbidities, as reported by the American Journal of Kidney Diseases 1
Elderly patients and those with significant comorbidities are at particularly high risk for hemodynamic complications, according to the American Journal of Kidney Diseases 4, 5
Hypotension during dialysis can lead to myocardial stunning, arrhythmias, and increased cardiovascular mortality, as noted by the American Journal of Kidney Diseases 2

Rapid correction of electrolyte abnormalities can lead to cardiac arrhythmias, as reported by the American Journal of Kidney Diseases 1
Patients with aluminum overload are at risk for acute aluminum neurotoxicity if dialysis is too aggressive initially, according to the American Journal of Kidney Diseases 6, 7

The initial dialysis session should be shorter (2-2.5 hours) with reduced blood flow rates (200-250 mL/min) and lower dialysate flow rates, as recommended by the American Journal of Kidney Diseases 3
Ultrafiltration should be minimal during the first session, focusing primarily on clearance rather than fluid removal, according to the American Journal of Kidney Diseases 1
The dialysis dose should be gradually increased over subsequent sessions as the patient tolerates the treatment, as noted by the American Journal of Kidney Diseases 2

Frequent vital sign checks (every 15-30 minutes) are necessary during the first dialysis session, as reported by the American Journal of Kidney Diseases 3
Close observation for neurological symptoms (headache, nausea, confusion) is crucial during the initial dialysis treatment, according to the American Journal of Kidney Diseases 1
Careful assessment of access function and blood flow is necessary during the first dialysis session, as noted by the American Journal of Kidney Diseases 3
Post-dialysis evaluation for delayed complications is essential, as reported by the American Journal of Kidney Diseases 2