What is the procedure for dialysis?

What is the procedure for dialysis?
April 18 09:00 2018 by admin Print This Article

There are two types of dialysis:-

Haemodialysis – Diverts blood into an external machine, where it’s filtered before being returned to the body.

Peritoneal dialysis – Pumps dialysis fluid into abdominal space to draw out waste products from the blood.

Haemodialysis and Peritoneal Dialysis

Haemodialysis process

• Pre-dialysis procedure – arteriovenous fistula(blood vessel is created by connecting an artery to a vein to transfer blood into dialysis machine and back again)
• During dialysis, 2 thin needles are inserted into the arteriovenous fistula.
• One needle removes blood and transfers it to a machine called a dialyser.
• The machine filters the waste products from the blood.
• Filtered blood is passed back into the body through the second needle.
• Most often, 3 sessions of haemodialysis are needed per week.

Peritoneal dialysis

There are two types of peritoneal dialysis
• Continuous ambulatory peritoneal dialysis (blood is filtered several times during the day)
• Automated peritoneal dialysis (a machine helps filter blood during the night while sleeping)

Continuous peritoneal dialysis process

• Pre-dialysis procedure involves making an opening in the abdomen and thin catheter is inserted.
• During dialysis, dialysate fluid flows through catheter into peritoneal cavity.
• Waste products from the blood are drawn out into the dialysate fluid.
• After a few hours, fluid is drained into waste bag.
• Fresh dialysate fluid is passed into cavity to replace it.

Automated peritoneal dialysis process

• A bag filled with dialysate fluid is attached to an automated peritoneal dialysis machine.
• It automatically performs a number of fluid exchanges, drawing out waste products.
• The fluid is changed before the next session.
If dialysis has been suggested for you or someone you know, have a detailed discussion with your nephrologist on all your doubts and questions. With improvement in medical technology, dialysis is becoming more efficient with every passing year.

Note, this blog post was updated on March 26, 2021


Kauvery Hospital is globally known for its multidisciplinary services at all its Centers of Excellence, and for its comprehensive, Avant-Grade technology, especially in diagnostics and remedial care in heart diseases, transplantation, vascular and neurosciences medicine. Located in the heart of Trichy (Tennur, Royal Road and Alexandria Road (Cantonment), Chennai, Hosur, Salem, Tirunelveli and Bengaluru, the hospital also renders adult and pediatric trauma care.

Chennai – 044 4000 6000 • Trichy – Cantonment – 0431 4077777 • Trichy – Heartcity – 0431 4003500 • Trichy – Tennur – 0431 4022555 • Hosur – 04344 272727 • Salem – 0427 2677777 • Tirunelveli – 0462 4006000 • Bengaluru – 080 6801 6801

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1 Comment

  1. Agatha Colins
    August 17, 17:20 #1 Agatha Colins

    Some genuinely interesting details you have written. Assisted me a lot, just what I was looking for : D.

    Reply to this comment

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