Sustained low-efficiency dialysis for critically ill patients requiring renal replacement therapy

Area of Science:

• Nephrology
• Critical Care Medicine
• Renal Replacement Therapy

Background:

• Renal function replacement in critically ill patients is complex and costly, with no current method proving superior for mortality benefit.
• Continuous renal replacement therapies offer advantages over intermittent hemodialysis (IHD) for hemodynamically unstable or catabolic patients.

Purpose of the Study:

• To evaluate the feasibility and outcomes of a hybrid technique, sustained low-efficiency dialysis (SLED), as an alternative to IHD in critically ill patients.
• To assess SLED's effectiveness in achieving dialysis and ultrafiltration goals while maintaining hemodynamic stability.

Main Methods:

• A single-center experience using SLED, a hybrid technique employing standard IHD equipment with reduced flow rates.
• Nocturnal 12-hour SLED treatments were performed to allow daytime patient access for procedures.
• Data collected from 37 critically ill patients who underwent 145 SLED treatments.

Main Results:

• SLED was performed in 37 critically ill patients when IHD failed or was withheld.
• Hemodynamic stability was generally maintained, with successful ultrafiltration in most cases.
• Mean delivered double-pool Kt/V was 1.36 per completed treatment; mean phosphate removal was 1.5 g per treatment.

Conclusions:

• Sustained low-efficiency dialysis (SLED) is a feasible alternative for critically ill patients when intermittent hemodialysis is not suitable.
• Further prospective studies are necessary to directly compare SLED with continuous renal replacement therapies and define its precise role.