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What Is Dialysis?

Dialysis is a treatment that helps do part of the kidneys' job when the kidneys can no longer clean the blood well enough on their own. It helps remove extra waste, extra fluid, and helps keep certain body chemicals in a safer range.

What dialysis does and does not do

Dialysis can do some of the filtering work that healthy kidneys normally do. It can help people feel better and stay alive when kidney failure becomes severe.

But dialysis is not a cure for kidney disease. It is a treatment that supports the body when kidney function is too low to safely manage waste and fluid alone.

When dialysis may be needed

  • Waste products are building up and causing nausea, poor appetite, fatigue, itching, or trouble thinking clearly
  • Fluid overload is causing swelling or shortness of breath
  • Potassium or acid levels are becoming dangerous
  • Kidney function is very low and symptoms are affecting daily life

The decision is not based on one lab value alone. Symptoms, fluid status, potassium, acid levels, and overall safety all matter.

Main types of dialysis

There is no single best option for everyone. The right choice depends on your health, home setup, support system, schedule, and personal preference.

In-Center Hemodialysis

Your blood is cleaned by a dialysis machine at a dialysis center, usually three times per week.

Pros

  • Staff handle the treatment and monitor you closely
  • You do not have to set up the machine at home
  • Good fit if you want in-person support

Cons

  • Fixed schedule and travel to the center
  • Treatments can leave some people tired afterward
  • Long gaps between sessions can make fluid and diet limits feel stricter

Home Hemodialysis

You perform hemodialysis at home after training, often on a schedule that can be more flexible or more frequent.

Pros

  • More control over timing and schedule
  • More frequent treatments may help some people feel better
  • Less travel to a dialysis center

Cons

  • Training and home setup are required
  • You may need a care partner depending on the program
  • Managing equipment and supplies becomes part of home life

Peritoneal Dialysis

A cleansing fluid goes into your belly through a catheter, uses the lining of your abdomen as a filter, and is then drained out.

Pros

  • Done at home and often offers more day-to-day independence
  • Gentler continuous treatment can mean fewer big swings in how you feel
  • No needles in the bloodstream during each treatment

Cons

  • You need to protect against infection around the catheter and during exchanges
  • A catheter stays in your abdomen
  • Not every patient is a good fit based on prior surgeries or medical factors

Types of peritoneal dialysis

CAPD

Continuous Ambulatory Peritoneal Dialysis

Manual fluid exchanges are done during the day, without a machine.

APD

Automated Peritoneal Dialysis

A machine performs exchanges overnight while you sleep.

Access matters

  • Hemodialysis usually needs an access such as a fistula, graft, or sometimes a catheter
  • Peritoneal dialysis uses a catheter placed into the abdomen

Planning access early is important because some access types take time to heal before they are ready to use.

Questions to ask your kidney team

  • Which type of dialysis fits my medical situation best?
  • Would I be a good candidate for home dialysis?
  • What access should I plan for, and when should it be placed?
  • How will dialysis affect my diet, fluid limits, and medications?
  • Can I keep working or traveling with this dialysis option?
  • Is transplant also something I should plan for now?

The best dialysis plan is the one you understand and can live with

Knowing your options early gives you more control and more time to prepare for the treatment that fits your life.

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