What’s the Difference Between CRRT and Dialysis?
CRRT and dialysis are both treatments for kidney failure—but they are not the same. CRRT (Continuous Renal Replacement Therapy) is typically used in intensive care for critically ill patients. Traditional dialysis, such as hemodialysis, is more common and done in scheduled sessions.
CRRT removes waste slowly and continuously over 24 hours. Dialysis removes waste more quickly in shorter sessions.
Is CRRT the Same as Hemodialysis?
No, CRRT is different from standard hemodialysis. While both filter the blood, CRRT runs continuously and is easier on the heart and blood pressure. Hemodialysis is often done 3 times per week for a few hours each time, which may cause rapid changes in fluid and electrolyte balance.
CRRT is preferred in ICU patients with unstable vital signs or severe illness.
Difference Between CVVH and Dialysis
CVVH (Continuous Veno-Venous Hemofiltration) is a form of CRRT that removes waste via convection rather than diffusion. This method is better for managing fluid balance in patients who cannot handle the stress of regular dialysis.
CRRT vs Peritoneal Dialysis: How Are They Different?
Peritoneal dialysis (PD) is a home-based option that uses the lining of the abdomen to filter blood. It’s suitable for stable patients who want flexibility. CRRT, in contrast, is used in hospitals for unstable patients who need constant monitoring.
When Is CRRT Preferred Over Dialysis?
Doctors use CRRT when patients are:
- In critical condition
- Have low blood pressure
- Are at risk of fluid overload
- Can’t handle standard dialysis
In these situations, CRRT offers a gentler, controlled approach to fluid and waste removal.
Summary: CRRT vs Hemodialysis vs CVVH vs PD
| Feature | CRRT / CVVH | Hemodialysis | Peritoneal Dialysis |
|---|---|---|---|
| Duration | 24/7 | 3–4 hours, 3x/week | Daily or nightly cycles |
| Setting | ICU / hospital | Outpatient clinic / home | Home |
| Fluid Removal | Slow and continuous | Fast and intermittent | Gradual |
| Main Use Case | Critical illness, ICU patients | Chronic kidney failure | Long-term at-home therapy |
Final Word
CRRT is not the same as dialysis. Each therapy serves a different purpose, depending on the patient’s condition. If you’re managing care for someone with kidney failure, understanding these options can help you have more informed conversations with your medical team.
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