As a physician, plasmapheresis (plasma exchange) may be used in selected patients with severe liver disease, especially acute liver failure or certain liver conditions associated with toxin accumulation.
Why is plasmapheresis used in liver damage?
The liver normally:
- Removes toxins from the blood
- Produces clotting factors
- Metabolizes bilirubin, ammonia, and inflammatory substances
When the liver is severely damaged, these harmful substances accumulate in the bloodstream and can cause:
- Hepatic encephalopathy (confusion, reduced consciousness)
- Coagulopathy (bleeding tendency)
- Jaundice
- Multi-organ dysfunction
Plasmapheresis helps by:
- Removing toxins that the damaged liver cannot clear.
- Removing inflammatory cytokines that contribute to organ failure.
- Replacing clotting factors when fresh frozen plasma (FFP) is used as the replacement fluid.
- Serving as a bridge while the liver recovers or until liver transplantation can be performed.
How does plasmapheresis work?
- Blood is withdrawn through a large venous catheter.
- A machine separates the blood into:
- Plasma (liquid portion)
- Blood cells (red cells, white cells, platelets)
- The patient’s plasma, containing toxins and harmful substances, is discarded.
- Donor plasma (usually FFP) or albumin is infused.
- The blood cells are mixed with the replacement fluid and returned to the patient.
Common indications in liver patients
- Acute liver failure
- Fulminant viral hepatitis
- Autoimmune hepatitis with severe liver failure
- Wilson disease causing acute liver failure
- Acute-on-chronic liver failure in selected cases
What improvements may be seen?
- Reduced bilirubin levels
- Reduced ammonia levels
- Better mental status
- Improved coagulation profile (PT/INR)
- Temporary support of liver function
Important point
Plasmapheresis does not cure the liver disease itself. It provides temporary support by removing harmful substances and replacing essential plasma components while the liver heals or until definitive treatment (such as transplantation) is available.