Dialysis is not recommended when the burden of treatment outweighs the benefit, which most often applies to older adults with multiple serious health conditions, people with very limited life expectancy, and the rare cases where dialysis is physically impossible to perform. While dialysis keeps millions of people alive, it is not always the right choice. For some patients, starting or continuing dialysis offers no survival advantage and may reduce quality of life in whatever time remains.
When Dialysis Cannot Physically Be Performed
True medical contraindications to dialysis are rare, but they do exist. Both major forms of dialysis require specific access points to work. Hemodialysis needs reliable blood vessel access and enough baseline blood pressure to sustain a treatment session. If a patient’s blood pressure drops too low during dialysis for the machine to filter blood effectively, hemodialysis becomes technically impossible.
Peritoneal dialysis, which filters blood through the lining of the abdomen, requires a functioning peritoneal membrane. A history of major abdominal surgery that caused extensive internal scarring can destroy this membrane and rule out the procedure. Peritoneal dialysis is also not advised when a patient has certain intestinal fistulas or abdominal stomas, though it can sometimes still work with urinary diversions or fully healed feeding tubes.
Beyond these access issues, absolute contraindications to either form of dialysis are uncommon. Factors like obesity, polycystic kidney disease, or social circumstances are sometimes treated as barriers, but published outcomes data generally don’t support ruling out dialysis based on those factors alone.
Older Adults With Multiple Health Problems
The most common scenario where dialysis is not recommended involves elderly patients carrying a heavy burden of other illnesses. Observational studies consistently show no survival advantage for elderly patients with high comorbidity scores who choose dialysis compared to conservative kidney management. In other words, these patients live roughly the same length of time whether they dialyze or not, but the dialysis group spends significantly more of that time in hospitals, clinics, and attached to machines.
Nursing home residents illustrate this starkly. Research on dialysis outcomes in this population found an annualized mortality rate of 70% in the first month after starting dialysis. Even after patients stabilized in months four through twelve, the annualized mortality rate remained around 30%. For someone already living in a care facility with limited independence, that level of risk often makes dialysis hard to justify.
The 2024 kidney disease guidelines from KDIGO now give special attention to patients at advanced age, noting that standard kidney function tests can be misleading in older adults because age-related muscle loss skews the results. For these patients, quality of life is often prioritized over any theoretical survival advantage, and the guidelines emphasize shared decision-making rather than automatic referral for dialysis.
How Doctors Estimate Who Will Benefit
Nephrologists use several tools to help predict whether dialysis will help or harm a specific patient. One widely studied method is the “surprise question,” where a doctor asks themselves: “Would I be surprised if this patient died within the next year?” When doctors answered “no” (meaning death within a year seemed likely), those patients had a 29.4% mortality rate at 12 months compared to 10.6% for patients the doctor expected to survive. The odds of dying within a year were 3.5 times higher for the “no” group. This simple gut-check helps identify patients unlikely to benefit from aggressive treatment.
More structured scoring tools also exist. One validated model uses age, sex, race, kidney function, protein in the urine, diabetes, tobacco use, and history of heart failure or stroke to generate a risk score from zero to 17. Patients scoring 10 or higher had a two-year mortality rate of roughly 94%, while those with lower scores had rates closer to 4%. A score in the high range signals that dialysis is unlikely to meaningfully extend life.
Kidney specialists also use a two-year kidney failure risk threshold. When the predicted risk of kidney failure within two years exceeds 40%, guidelines recommend beginning education about treatment options, including the option of no dialysis at all. This is the point where the conversation should start, not necessarily where a decision gets made.
What Conservative Kidney Management Looks Like
Choosing not to dialyze does not mean choosing no treatment. Conservative kidney management focuses on controlling symptoms, maintaining comfort, and preserving quality of life for as long as possible. The kidneys continue to decline, but medical care shifts toward managing what the patient actually feels rather than replacing what the kidneys can no longer do.
Pain is managed in a stepwise approach, starting with simple pain relievers and moving to stronger options if needed. Certain pain medications that are normally safe become problematic when the kidneys can’t clear them. Morphine, for example, is not recommended because its breakdown products build up dangerously. Safer alternatives that don’t accumulate the same way are used instead.
Itching, one of the most common and distressing symptoms of advanced kidney failure, is treated with moisturizers, specialized creams, antihistamines, or anti-nausea medications depending on severity and pattern. Nausea, fatigue, fluid retention, and appetite loss are also actively managed. The goal is to keep the patient as comfortable and functional as possible without the time commitment and physical toll of dialysis sessions.
The Shared Decision-Making Process
The decision to forgo or stop dialysis is not made casually. The Renal Physicians Association outlines a structured process that includes screening for depression (which can distort decision-making), assessing cognitive function, and confirming that the patient genuinely understands what they’re choosing. Capacity to make this decision means the patient can understand their condition, appreciate the consequences of each option, connect those options to their own values, and communicate a clear choice.
Prognostic information is shared openly. The patient or their designated decision-maker hears realistic estimates of how long they might live with and without dialysis, what their functional status is likely to look like, and what symptoms to expect. The conversation also covers the circumstances under which the patient might want to stop dialysis later, even if they choose to start now. These preferences are documented in the medical record.
For patients where the benefit of dialysis is genuinely uncertain, a time-limited trial offers a middle path. The patient starts dialysis with a pre-agreed timeframe and specific criteria for evaluating whether it’s helping. If the patient improves or stabilizes, dialysis continues. If they decline or show no benefit, the focus shifts to comfort care. This approach lets patients and families avoid an all-or-nothing decision when the outcome is hard to predict.
When Stopping Dialysis Is Appropriate
Dialysis can also become not recommended after it has already started. A patient who was doing well on dialysis may develop a new serious illness, experience a major decline in function, or simply reach a point where the treatment feels worse than the disease. Roughly one in four dialysis patients in some studies ultimately choose to stop treatment.
The evaluation process for withdrawal mirrors the initial decision. Doctors assess whether depression, uncontrolled pain, or a reversible medical issue might be driving the request. Standardized questionnaires help identify whether specific treatable problems are making dialysis feel intolerable. If those issues can be addressed, the patient may choose to continue. If the desire to stop reflects a genuine, informed preference, that decision is supported with a transition to comfort-focused care.
The key principle throughout is that dialysis is a treatment, not an obligation. It exists to serve the patient’s goals. When it no longer does, whether because of physical limitations, overwhelming illness, or personal values, not dialyzing becomes the medically and ethically appropriate path.