Continuous Renal Replacement Therapy (CRRT) is a critical therapeutic intervention designed for patients in the Intensive Care Unit (ICU) who suffer from acute kidney injury (AKI) or fluid overload and cannot tolerate standard intermittent hemodialysis. Unlike conventional dialysis, which is performed in discrete sessions over several hours, CRRT operates continuously — 24 hours a day — providing a gentler, more gradual approach to renal support.
Why is CRRT Used?
Critically ill patients in the ICU are often hemodynamically unstable — meaning their cardiovascular systems cannot tolerate the rapid fluid shifts that occur during conventional hemodialysis. CRRT offers a solution by providing continuous, slow removal of waste products, excess fluids, and electrolytes. This gradual approach is far better tolerated by patients with compromised cardiovascular function.
How Does CRRT Work?
CRRT operates similarly to hemodialysis but at a much slower rate and on a continuous basis. The patient's blood passes through a specialized filter (hemofilter) that removes waste products and excess fluid. The filtered blood is then returned to the patient's body. This process continues around the clock, mimicking — in a slow and controlled way — the filtering function that healthy kidneys perform continuously.
Who Benefits from CRRT?
CRRT is most commonly indicated for critically ill ICU patients who have acute kidney injury with hemodynamic instability, fluid overload unresponsive to diuretics, severe electrolyte imbalances, metabolic acidosis, or certain toxin ingestions. The decision to initiate CRRT is made by the treating intensivist or nephrologist based on the patient's overall clinical picture.
How Long Does CRRT Last?
The duration of CRRT varies depending on the patient's underlying condition and trajectory of recovery. Some patients may require CRRT for only a few days, while others with more severe AKI may need continuous therapy for weeks. CRRT may be discontinued when the patient's kidney function recovers sufficiently or when they can safely transition to a different form of renal support.
Celly Mobile Dialysis provides expert CRRT services directly to hospitals and ICU settings, with our skilled nursing team supporting your facility's critically ill patients at the bedside.
