When the kidneys can no longer perform enough of their normal functions, two main forms of kidney replacement therapy are available: dialysis and kidney transplantation.
Dialysis uses a treatment to remove waste and excess fluid from the blood when the kidneys can no longer do this adequately. A kidney transplant involves placing a healthy kidney from a living or deceased donor into the recipient's body.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Both can be used to treat kidney failure, but they are very different experiences. Dialysis provides ongoing support for kidney function, while a successful transplant provides a functioning donor kidney and removes the need for dialysis.
The appropriate option depends on a person's medical condition, transplant eligibility, donor availability, preferences, and long-term circumstances. Learn more about transplantation in our Kidney Transplant Surgery guide.
Kidney Transplant and Dialysis: What Is the Difference?
The simplest way to understand the difference is to look at how each treatment replaces lost kidney function.
| Kidney Transplant | Dialysis |
|---|---|
| A healthy donor kidney is placed into the body. | A treatment removes waste and excess fluid from the blood. |
| Can provide functioning kidney replacement. | Provides part of the functions normally performed by healthy kidneys. |
| A successful transplant eliminates the need for dialysis. | Requires ongoing treatment unless a successful transplant takes place. |
| Requires lifelong anti-rejection medicines and medical monitoring. | Requires regular dialysis treatments, medicines, monitoring, and dietary/fluid management. |
| Requires major surgery and a suitable donor kidney. | Does not require transplant surgery and can be started or continued while awaiting transplantation. |
How Does Dialysis Fit Into Kidney Failure Treatment?
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Dialysis is a life-sustaining treatment for people whose kidneys can no longer adequately remove waste and excess fluid. There are two main forms:
- Haemodialysis: blood is passed through a filter to remove waste and excess fluid.
- Peritoneal dialysis: the lining of the abdomen, called the peritoneum, is used as a natural filtering membrane.
What Changes After a Kidney Transplant?
A successful kidney transplant provides the recipient with a functioning donor kidney. When the transplanted kidney works well, dialysis is no longer required.
This can change many aspects of daily life. People may have more flexibility around work, travel, physical activity, food, and fluid intake, although transplant recipients still need regular medical care and must take anti-rejection medicines. A transplant therefore replaces the routine of dialysis with a different form of long-term treatment and monitoring.
How Do the Two Options Affect Daily Life?
Daily life can be affected differently by dialysis and transplantation.
Life With Dialysis
Dialysis becomes part of the person's regular schedule. The exact impact depends on whether the person receives haemodialysis or peritoneal dialysis and whether treatment is performed at a centre or at home.
People on dialysis may need to plan activities around treatment sessions and follow an individualised diet and fluid plan. Some people also experience fatigue, particularly around dialysis sessions.
At the same time, dialysis can provide a stable treatment routine, and many people continue working, travelling, exercising, and participating in everyday activities while receiving dialysis.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Life After Transplantation
A functioning transplant can provide more freedom from treatment schedules because regular dialysis is no longer required.
However, transplantation introduces its own responsibilities. Anti-rejection medicines must be taken consistently, blood tests and follow-up appointments remain important, and the recipient needs to be aware of infection and other complications associated with immunosuppression.
So the change is not from “treatment” to “no treatment.” It is a change from dialysis-based kidney replacement to transplant-based long-term care.
Which Option Has Fewer Long-Term Treatment Burdens?
For a medically suitable patient with a functioning transplant, transplantation can reduce some of the ongoing treatment burden associated with dialysis. It can eliminate regular dialysis sessions and may allow greater flexibility with diet, fluids, travel, and daily activities.
However, transplant recipients have their own long-term responsibilities, particularly lifelong immunosuppression and regular monitoring. Dialysis remains an essential and effective treatment for people who cannot receive a transplant or who are waiting for a donor kidney.
What Are the Risks of Dialysis?
Dialysis itself is a life-sustaining treatment, but it can have complications and practical burdens. Depending on the type of dialysis, possible issues include:
- Fatigue
- Problems related to dialysis access
- Infections
- Changes in blood pressure
- Muscle cramps or other treatment-related symptoms
- Dietary and fluid restrictions
- The ongoing time commitment associated with treatment
What Are the Risks of a Kidney Transplant?
Transplantation involves major surgery and lifelong immunosuppressive treatment, so it also has important risks. These can include:
- Rejection of the transplanted kidney
- Infections related to immunosuppression
- Surgical complications
- Medication side effects
- Cardiovascular and metabolic complications
- Problems affecting the transplanted kidney
- Eventual loss of transplant function in some patients
These risks are carefully assessed before transplantation and monitored after surgery.
Does a Kidney Transplant Last Forever?
A transplanted kidney can function for many years, but a transplant is not guaranteed to last for the recipient's entire lifetime.
How long a transplant continues to function depends on factors such as donor and recipient characteristics, rejection, infections, medication adherence, underlying health conditions, and other causes of graft injury.
If a transplanted kidney eventually stops functioning, the patient may need to return to dialysis and may sometimes be evaluated for another transplant.
What About Life Expectancy?
For suitable patients, kidney transplantation is associated with longer survival compared with remaining on dialysis, although the exact benefit varies considerably between individuals. Age, cardiovascular health, other medical conditions, time spent on dialysis, donor factors, and transplant complications can all influence outcomes.
This is one reason transplantation is considered the preferred form of kidney replacement therapy for suitable candidates in current clinical guidance. It does not mean that transplantation is appropriate or achievable for every person with kidney failure.
Can You Have a Transplant Before Starting Dialysis?
Yes. A patient does not necessarily need to start dialysis before being evaluated for transplantation. A preemptive kidney transplant is performed before dialysis becomes necessary. When appropriate, early transplant evaluation can provide time to identify a suitable living donor and complete the medical assessment.
If a transplant cannot be arranged before dialysis is needed, dialysis can provide kidney replacement therapy while the patient waits for a suitable kidney.
What If a Person Is Not Eligible for Transplantation?
Not everyone with kidney failure is medically suitable for transplantation. Significant cardiovascular disease, active infection, certain cancers, or other serious health problems may make transplantation unsafe or require treatment before it can be reconsidered.
In such situations, dialysis can continue to provide kidney replacement therapy. A person's treatment plan may also be reassessed if their health changes or a previously modifiable problem is addressed.
So Which Treatment Is Right for You?
There is no single answer that applies to every person with kidney failure. For someone who is medically suitable and has access to a suitable donor kidney, transplantation may provide advantages that dialysis cannot, including freedom from dialysis and the potential for longer survival and improved quality of life.
For someone who is not eligible for transplantation, is waiting for a donor, or needs kidney replacement therapy immediately, dialysis may be an essential part of treatment. For some patients, the two treatments are not competing choices at all. Dialysis may serve as a bridge while the patient undergoes transplant evaluation or waits for a suitable donor kidney.
The Bottom Line
Dialysis and kidney transplantation are both established treatments for kidney failure, but they work in very different ways. Dialysis provides ongoing support by removing waste and excess fluid, while a successful transplant provides a functioning donor kidney.
For people who are medically suitable, transplantation can offer freedom from regular dialysis and is associated with better quality of life and longer survival on average. It also involves major surgery, lifelong anti-rejection medicines, and ongoing monitoring.
Dialysis remains an essential treatment for people who cannot undergo transplantation, are waiting for a donor kidney, or need immediate kidney replacement therapy. In many cases, dialysis and transplantation are part of the same treatment journey rather than mutually exclusive choices.
The most appropriate option depends on the individual's health, transplant eligibility, donor availability, lifestyle, and personal circumstances. A transplant evaluation can help determine whether transplantation is a suitable option and how it compares with continuing dialysis in that particular situation.
