Dialysis is a form of kidney replacement therapy used when the kidneys can no longer remove enough waste, extra fluid and certain minerals from the blood.

Healthy kidneys perform several important functions, including removing waste products, maintaining fluid and electrolyte balance, helping regulate blood pressure and supporting red blood cell and bone health. When kidney function becomes severely impaired, dialysis can replace some—but not all—of these functions.

Dialysis may be used in people with advanced chronic kidney disease or kidney failure. It can also be required temporarily in selected cases of acute kidney injury, depending on the severity and complications.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized assessment and kidney-care planning for patients who may require dialysis.

When Does a Kidney Patient Need Dialysis?

Dialysis is not started simply because a creatinine result crosses one particular number.

The nephrologist considers the complete clinical situation, including:

• Kidney function

• Symptoms of kidney failure

• Fluid accumulation

• Potassium levels

• Acid-base abnormalities

• Urine output

• Nutritional status

• Uremic complications

• Underlying kidney disease

• Overall medical condition

For many people with progressive kidney failure, dialysis is considered when kidney function becomes very low and complications or symptoms can no longer be adequately controlled with medical treatment. NIDDK notes that many people begin dialysis when GFR is approximately 5 to 10 mL/min, although the decision is individualized.

Does Every Kidney Patient Need Dialysis?

No.

Having chronic kidney disease does not automatically mean that dialysis will be required.

Some people have CKD that remains stable for many years. Others progress to kidney failure.

Dialysis becomes relevant when the kidneys can no longer adequately perform their functions and the clinical situation requires kidney replacement therapy.

People with kidney failure may have several treatment pathways, including:

• Hemodialysis

• Peritoneal dialysis

• Kidney transplantation

• Conservative kidney management in selected situations

Dialysis for Acute Kidney Injury

Dialysis is not limited to permanent kidney failure.

A person can develop acute kidney injury (AKI) over a short period because of conditions such as:

• Severe infection

• Major dehydration

• Very low blood pressure

• Certain medicines or toxins

• Urinary obstruction

• Severe illness

• Major surgery or other medical complications

In severe AKI, dialysis may sometimes be needed temporarily while the kidneys recover.

Whether dialysis is necessary depends on complications and the patient's overall condition rather than creatinine alone.

The Two Main Types of Dialysis

There are two principal forms of dialysis:

Hemodialysis

Hemodialysis circulates blood through a specialized filter outside the body.

The dialyzer removes:

• Waste products

• Excess fluid

• Certain excess minerals

The cleaned blood is then returned to the body. Hemodialysis can be performed in a dialysis center or, for appropriately selected and trained patients, at home.

Peritoneal Dialysis

Peritoneal dialysis uses the lining of the abdomen, called the peritoneum, as a natural filtering membrane.

Dialysis fluid is introduced into the abdominal cavity through a catheter. Waste and excess fluid move into the dialysis solution, which is then drained and replaced.

Peritoneal dialysis is generally performed at home and requires appropriate training and a suitable abdominal catheter.

Hemodialysis for Kidney Patients: How Does It Work?

During hemodialysis, blood is taken from the body and passed through a dialyzer.

Inside the dialyzer, waste products and excess fluid move out of the blood into the dialysis solution.

The filtered blood is then returned to the patient.

A typical in-center hemodialysis schedule is often three sessions per week, with each session lasting several hours, although the exact prescription varies between patients. Home hemodialysis can follow different schedules.

The nephrologist determines the dialysis prescription according to:

• Remaining kidney function

• Body size

• Fluid status

• Laboratory results

• Symptoms

• Dialysis adequacy

• Other health conditions

What Is Needed Before Starting Hemodialysis?

A patient generally needs a reliable way for blood to travel to and from the dialysis machine.

Possible vascular access options include:

Arteriovenous Fistula

An AV fistula connects an artery and vein, usually in the arm.

It is commonly preferred for long-term hemodialysis access when suitable.

Arteriovenous Graft

A synthetic graft can connect an artery and vein when a suitable fistula cannot be created.

Dialysis Catheter

A venous catheter may be used when dialysis is needed urgently or when permanent vascular access has not yet been established.

Catheters are generally considered temporary access when longer-term options are appropriate.

What Happens During a Dialysis Session?

The exact experience differs between patients, but a hemodialysis session generally involves:

1. Checking weight and vital signs.

2. Assessing fluid status and the dialysis access.

3. Connecting the patient to the dialysis system.

4. Passing blood through the dialyzer.

5. Removing waste and excess fluid according to the prescribed treatment.

6. Returning filtered blood to the patient.

7. Checking the patient after treatment.

Blood pressure and other parameters may be monitored during treatment.

Some people experience fatigue, cramps, dizziness or blood-pressure changes during or after dialysis. These symptoms should be discussed with the dialysis team.

How Does Dialysis Remove Excess Fluid?

When kidneys produce little urine, fluid can accumulate between dialysis sessions.

Hemodialysis can remove a prescribed amount of excess fluid from the bloodstream.

The amount removed is individualized based on:

• Current weight

• Target or dry weight

• Blood pressure

• Swelling

• Breathing symptoms

• Remaining urine production

• Fluid intake

Removing fluid too rapidly can contribute to low blood pressure and other symptoms, so the dialysis prescription needs to be individualized.

Dialysis and Fluid Intake

A kidney patient on dialysis may need to control how much fluid is consumed.

This does not mean that every dialysis patient has the same fluid restriction.

Fluid requirements depend on:

• Urine output

• Dialysis type

• Body size

• Heart function

• Blood pressure

• Degree of fluid retention

• Other medical conditions

Patients should follow the fluid target prescribed by their nephrologist rather than adopting a generic internet recommendation.

What Should a Dialysis Patient Eat?

Dietary requirements change when kidney function becomes severely reduced.

A dialysis diet may need individualized management of:

• Sodium

• Potassium

• Phosphorus

• Protein

• Calories

• Fluid

Hemodialysis can remove some protein, so adequate protein intake is important for many patients. However, the exact nutritional plan depends on the person's health, laboratory results and dialysis modality.

A renal dietitian can help create a practical meal plan.

Patients should not make extreme dietary restrictions without professional guidance.

What Symptoms Can Improve With Dialysis?

When symptoms are caused by waste accumulation or excess fluid, appropriate dialysis may help improve problems such as:

• Swelling

• Breathlessness related to fluid overload

• Nausea

• Poor appetite

• Fatigue

• Some electrolyte abnormalities

• Symptoms associated with uremia

The degree of improvement varies according to the underlying disease and the patient's overall condition.

What Are Possible Side Effects of Dialysis?

Dialysis is an important treatment but can have complications.

During or after hemodialysis, some patients may experience:

• Low blood pressure

• Muscle cramps

• Fatigue

• Headache

• Nausea

• Dizziness

There can also be complications involving vascular access, including infection or clotting.

Peritoneal dialysis has different risks, particularly catheter-related problems and peritonitis, an infection involving the abdominal lining.

Any unusual symptoms should be reported promptly to the dialysis team.

Can Dialysis Cure Kidney Failure?

No.

Dialysis does not repair permanently damaged kidneys or completely reproduce all normal kidney functions.

It replaces some of the kidneys' filtration work and can help remove waste and excess fluid.

For suitable patients, kidney transplantation can provide functioning kidney tissue and may be an alternative to long-term dialysis.

In some cases of acute kidney injury, dialysis may be temporary if kidney function subsequently recovers.

Can a Kidney Patient Stop Dialysis?

A patient should never stop dialysis independently.

If dialysis is being used for acute kidney injury and kidney function recovers sufficiently, the nephrologist may determine that dialysis can be discontinued.

For established kidney failure, stopping dialysis can allow waste, fluid and electrolyte abnormalities to accumulate and may become life-threatening.

Treatment decisions should be made with the kidney-care team.

Is Dialysis Always Permanent?

No.

The duration depends on the underlying kidney problem.

Temporary Dialysis

Temporary dialysis may be needed in selected cases of acute kidney injury while the kidneys recover.

Long-Term Dialysis

People with irreversible advanced kidney failure may require ongoing dialysis unless they undergo transplantation or choose an appropriate alternative treatment plan.

The nephrologist assesses kidney function and the patient's overall condition before determining the long-term plan.

Kidney Transplant as Another Treatment Option

For appropriately selected patients with kidney failure, transplantation may offer an alternative to ongoing dialysis.

A transplant evaluation considers factors such as:

• Overall health

• Heart and blood-vessel health

• Cancer history

• Infections

• Other medical conditions

• Surgical suitability

• Ability to take long-term anti-rejection medicines

Not every kidney patient is a transplant candidate, so specialist assessment is necessary.

Can Dialysis Patients Live a Normal Life?

Many people receiving dialysis continue to work, study, travel and participate in family and social activities.

Daily routines may need adjustment around dialysis sessions, diet, fluid management and medical appointments.

Following the prescribed dialysis schedule and maintaining regular communication with the healthcare team are important parts of long-term care.

How Can a Kidney Patient Prepare for Dialysis?

If kidney function is progressively declining, early planning can help avoid an emergency start.

Preparation may include:

• Learning about hemodialysis and peritoneal dialysis

• Discussing transplantation

• Planning vascular access

• Reviewing medications

• Meeting a renal dietitian

• Understanding fluid management

• Monitoring laboratory results

• Discussing home dialysis when appropriate

NIDDK recommends early education and preparation for people approaching kidney failure because it can provide time to consider treatment options and prepare physically.

When Should a Kidney Patient Contact a Doctor Urgently?

A kidney patient should seek urgent medical assessment for symptoms such as:

• Severe breathlessness

• Chest pain

• Confusion

• Very little or no urine

• Severe weakness

• Rapidly increasing swelling

• Persistent vomiting

• Severe dizziness or fainting

• Fever with suspected dialysis-access infection

• Redness, pus or significant pain around a dialysis catheter or access

Severe fluid accumulation and other complications of kidney failure can become emergencies.

Dialysis Care at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized kidney-care assessment for patients who may need dialysis or who are already receiving kidney replacement therapy.

Depending on the patient's condition, care may include:

• Evaluation of kidney-function decline

• Assessment of dialysis indications

• Acute kidney injury management

• Chronic kidney disease monitoring

• Hemodialysis-related medical management

• Peritoneal dialysis assessment

• Fluid and electrolyte management

• Blood-pressure management

• Medication review

• Dialysis access-related coordination

• Kidney transplant evaluation and follow-up

• Nutritional and lifestyle guidance

The appropriate dialysis plan depends on kidney function, symptoms, complications, treatment goals and overall health.

Frequently Asked Questions

When is dialysis needed for a kidney patient?

Dialysis may be needed when kidney function is severely reduced and complications such as uncontrolled fluid overload, dangerous electrolyte abnormalities, severe acid-base problems or uremic symptoms cannot be adequately managed with other treatment. A single creatinine value does not determine the need for dialysis.

Is dialysis only for stage 5 kidney disease?

Dialysis is most commonly associated with kidney failure, but temporary dialysis can also be required in severe acute kidney injury. The decision depends on the clinical situation.

How many times a week does a kidney patient need dialysis?

Many people receiving in-center hemodialysis have treatment about three times per week, with sessions lasting several hours. However, dialysis schedules vary and may be different for home hemodialysis or individual clinical needs.

Does dialysis reduce creatinine?

Yes. Dialysis removes creatinine and other waste products from the blood. However, if the kidneys remain severely impaired, creatinine and other wastes can accumulate again between treatments.

Can a kidney patient recover after dialysis?

In some cases of acute kidney injury, kidney function can recover enough for dialysis to be stopped. In established irreversible kidney failure, long-term dialysis or another kidney replacement option may be necessary.

Is hemodialysis better than peritoneal dialysis?

There is no single dialysis method that is appropriate for every patient. The choice depends on medical condition, lifestyle, home circumstances, access considerations and patient preference.

Can a dialysis patient drink normal amounts of water?

Not necessarily. Fluid intake may need to be limited when urine production is low, but the appropriate amount varies from person to person. Follow the fluid plan provided by the nephrology team.

Can dialysis be avoided?

Sometimes. If kidney dysfunction is temporary or complications can be controlled medically, dialysis may not be required or may only be temporary. In established kidney failure, treatment options include dialysis, transplantation and, for selected patients, conservative kidney management.

Conclusion

Dialysis for a kidney patient may become necessary when the kidneys can no longer adequately remove waste, control fluid balance or maintain safe levels of electrolytes and acid-base balance.

Hemodialysis and peritoneal dialysis are the two main forms of dialysis. Hemodialysis filters blood through a machine, while peritoneal dialysis uses the lining of the abdomen as a filtering membrane. Kidney transplantation is another option for appropriately selected patients.

Dialysis is not automatically required for every person with kidney disease, and it is not started based solely on creatinine or a particular eGFR value. Symptoms, complications, kidney-function trends, urine output and the overall clinical condition all matter.

Early discussion with a nephrologist can help a kidney patient understand treatment choices and prepare for dialysis if it becomes necessary.

For individualized kidney-failure assessment, dialysis planning and specialist nephrology care, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.

Medical Disclaimer

This article is intended for general educational and informational purposes only and should not be considered a substitute for medical diagnosis, treatment or individualized medical advice. Not every kidney patient needs dialysis, and dialysis decisions depend on kidney function, symptoms, electrolyte and acid-base abnormalities, fluid status, urine output, underlying disease and overall health. Dialysis schedules, fluid restrictions, diet and medicines must be individualized by the treating nephrology team. Do not start, stop, skip or change dialysis sessions, medicines or fluid intake based solely on this article. Seek urgent medical attention for severe breathlessness, chest pain, confusion, very little or no urine, rapidly worsening swelling, persistent vomiting, fainting or suspected infection of a dialysis access. Consult Dr. Sandip Prabhakar Bhurke or another qualified nephrologist for personalized kidney-care guidance.