What Is Dialysis? Types, Process & Benefits Explained

Written by - Editorial Team
Medically Reviewed by - Dr Sree Rama Chandra Sekhar Susarla

On Sat, 05 Sep 2026 Renal Care

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Dialysis is a treatment used to get rid of waste materials, excess fluids, and toxins from the blood when the kidneys have started failing in doing their jobs. The healthy kidneys perform a very critical function, which involves cleaning the blood of the waste and controlling the levels of the fluids in the body. Once the functions of the kidneys fail completely, dialysis needs to be done.

But when is it necessary? Dialysis is necessary when the kidneys are not functioning at all and failing to filter the waste out and keeping it from building up in the body. However, the decision cannot be made based on a single blood test only. Instead, the doctors will also evaluate the kidney functions, symptoms, blood work, fluid balance, and the general state of health of the patient when making the decision about starting dialysis.

When is dialysis required?

A person suffering from kidney disease may require dialysis when the organs can no longer keep the internal balance of the body or when the consequences of kidney disease is beyond medical treatment.

Dialysis may be taken into account in case of:

Critical loss of kidney function
High levels of waste products in the blood
Excess fluid in the body that is not favorable to medications
Change of potassium level or other electrolytes
Complications affecting the heart, lungs, and brain
Symptoms caused by kidney disease
Sudden kidney disease cases resulting in a temporary loss of organ functionality.
Dialysis may be used temporarily with cases of acute kidney failure or chronic kidney disease for a longer period of time.

Visit the Nephrology Department at Continental Hospitals, Hyderabad, for expert kidney care, advanced diagnostics, and comprehensive treatment options.

How Do You Recognize When Dialysis Is Necessary?

What are the symptoms when kidney disease worsens? Some experience intense symptoms, while others suffer extensive kidney damage with little or no noticeable issues.

Some of the signs include:

Extreme fatigue
Nausea
Lack of appetite
Swelling of feet, hands, or face
Decreased urine output
Breathing difficulties due to fluid overload
Confusion
Persistent itching
Muscle spasms
Changes in sleeping patterns

Each of these symptoms could arise from different conditions and do not signify the need for kidney dialysis unless evaluated by a medical professional.

What are the general types of dialysis?

What are the different types of dialysis? Hemodialysis and peritoneal dialysis are the principal types.

What is hemodialysis?

Hemodialysis is a process that utilizes a dialysis machine and a dialyzer to purify blood. The blood is collected from inside the body, flows through the dialyzer, and then returned freshly purified.

Hemodialysis can be done in the dialysis center or for eligible individuals at home with training and doctor support.

What is peritoneal dialysis?

Peritoneal dialysis uses the peritoneum, which is the lining of the abdominal cavity, as a filter. The method involves the process of introducing a dialysis solution into the abdominal cavity via a tube. Waste and excess fluid are removed into the solution, and the solution is replaced.

This type of dialysis can also be performed at home with proper training and doctor’s assistance.

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What Is the Process of Dialysis?

The dialysis process varies based on the method of dialysis.
In hemodialysis, the blood is filtered through a dialyzer. However, it must first be accessed from the body.
During peritoneal dialysis, the process involves the introduction of the dialysis fluid through a catheter into the abdomen. This product will remain within the abdomen for the required time.
In both methods, the method of dialysis process employed depends on various factors, including the patients’ overall health, kidney function, medical needs and lifestyle considerations.

Is Dialysis the Sole Option for Infliction of Kidney Failure?

Is dialysis the only method of treating kidney failure? The answer is no, as treatment for kidney failure differs based on the cause and severity of kidney disease.

Possible procedures include:

Medications to treat high blood pressure and other complications
Dietary and fluid processing
Treating primary kidney disease
Taking necessary measures against diabetes and cardiovascular risk factors
Utilizing peritoneal or hemodialysis if necessary
Performing a kidney transplant in suitable candidates

Dialysis is an essential treatment for some patients who experience kidney failure; thus, treatment must be chosen by a nephrologist for every patient.

How Should Patients Get Ready for Dialysis?

What can be done when patients are faced with the need for dialysis? Learning about the procedure and taking action in advance can ease the way of undergoing the treatment.

The basic actions may include the following:

Checking kidney function on a regular basis
Following dietary and other fluid recommendations
Taking medication according to the prescriptions made by a doctor
Consulting a nephrologist on the types of access to dialysis
Getting to understand the different types of dialysis
Keeping scheduled medical appointments
Inquiring about how one can lead a normal life during the procedure.

Taking precautions early will prevent unnecessary delays in case of the doctor’s recommendation to do dialysis.

Why opt for Continental Hospitals for dialysis treatment?

Why is it important to select a seasoned institution for dialysis treatment? Kidney failure patients may need more than simply dialysis treatment; they require other treatment modalities, intervention for their medical condition, medication advice, nutritional help, and emergency care.

Continental Hospitals, Hyderabad, provides comprehensive kidney treatment with the help of expert nephrologists, state-of-the-art medical facilities, dialysis equipment, diagnostic services, and treatment that is coordinated by multi-specialty support. The hospital has adhered to strict quality control and safety protocols and boasts a number of recognitions that determine its dedication to quality medical services.

What are the important things to take into account regarding dialysis?

Dialysis helps the human organism when kidneys cannot work well enough to filter the waste and too much fluid.
Dialysis can be either temporary or long-lasting depending on the problem causing the kidney failure.
Dialysis has two main types: hemodialysis and peritoneal dialysis.
Symptoms are not the only factor that affects the decision to use dialysis in the treatment of kidney diseases.
Physicians are guided by kidney functionalities, symptoms, and additional medical tests while diagnosing a patient.
Early nephrology care enables the patient to know their treatment options better.

Conclusion

What is the indication for the use of dialysis? Dialysis may become essential when there is significant kidney failure that results in complications that cannot be managed by the kidney anymore. Identifying the signs of kidney failure and obtaining timely medical attention can assist in understanding how to manage kidney disease.

In case of symptoms like edema, low urine production, continuous vomiting, extreme tiredness, or difficulty in breathing, or if you have been diagnosed with advanced kidney disease, you should consult our best nephrologist in Hyderabad at Continental Hospitals, Hyderabad, for a thorough examination and personalized kidney treatment.

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Frequently Asked Questions

When is dialysis needed?

Dialysis may be needed when the kidneys can no longer work effectively. It helps remove waste and excess fluid from the blood. Dialysis may be recommended in advanced kidney failure. It can also be needed temporarily during severe acute kidney injury. Doctors consider kidney function, symptoms, and overall health before starting dialysis. Very high levels of waste products may require urgent treatment. Severe fluid buildup can also be a reason for dialysis. High potassium levels that do not respond to treatment may require dialysis. Severe acid buildup in the blood can also be an indication. Certain toxin or drug poisonings may sometimes require dialysis. The decision is not based only on a specific creatinine or eGFR number. A nephrologist evaluates the complete clinical situation before recommending dialysis.

What are signs you may need dialysis?

Some symptoms may occur when kidney function becomes severely reduced. Persistent swelling in the legs, feet, or face can be a warning sign. Severe tiredness and weakness may also occur. Nausea, vomiting, or loss of appetite can develop. Changes in urination may occur as kidney disease progresses. Shortness of breath can happen when excess fluid builds up. Confusion or difficulty concentrating may occur in severe cases. Persistent itching can also occur with advanced kidney disease. Muscle cramps or weakness may be associated with electrolyte problems. Chest discomfort may occur in serious cases involving fluid around the heart. These symptoms can have many other causes as well. Blood tests and medical evaluation are needed to determine whether dialysis is necessary.

What are the types of dialysis?

There are two main types of dialysis used for kidney failure. They are hemodialysis and peritoneal dialysis. Hemodialysis uses a dialysis machine to filter the blood. Blood passes through a special filter called a dialyzer. The cleaned blood is then returned to the body. Peritoneal dialysis uses the lining of the abdomen to filter waste. A special dialysis solution is placed inside the abdominal cavity. Waste and extra fluid move into this solution. The used solution is then drained and replaced. The choice depends on medical and lifestyle factors. Doctors discuss the benefits and limitations of each option with the patient. Some patients may also require temporary dialysis during acute kidney problems.

How does hemodialysis work?

Hemodialysis filters the blood using a dialysis machine. Blood is taken from the body through a vascular access. It passes through a dialyzer that removes waste products and excess fluid. The filtered blood is then returned to the body. The dialyzer also helps balance certain minerals and electrolytes. Hemodialysis is commonly performed at a dialysis center. Some patients may be able to receive treatment at home. Treatment schedules vary according to individual medical needs. Many people receive hemodialysis several times each week. Each session may last several hours. A nephrologist determines the appropriate dialysis prescription. Regular monitoring helps doctors adjust treatment when needed.

How does peritoneal dialysis work?

Peritoneal dialysis uses the lining of the abdomen as a natural filter. A catheter is placed into the abdominal cavity for dialysis access. Dialysis solution is introduced through the catheter. Waste products and excess fluid move from the blood into the solution. The used solution is then drained from the abdomen. Fresh dialysis solution is placed inside to continue the process. Exchanges can be performed manually during the day. Automated peritoneal dialysis can also use a machine during sleep. The treatment schedule depends on the patient's medical needs. Proper hygiene is essential during peritoneal dialysis. Infection is an important complication that patients need to watch for. The dialysis team teaches patients how to perform the treatment safely.

Is dialysis permanent?

Dialysis is not always permanent for every patient. Some people need dialysis temporarily after severe acute kidney injury. Kidney function may improve enough to stop dialysis in these situations. People with advanced chronic kidney failure may need long-term dialysis. The duration depends on the underlying kidney condition. Some patients may eventually receive a kidney transplant. A successful kidney transplant can eliminate the need for regular dialysis. Not every patient is medically suitable for transplantation. Doctors regularly assess kidney function and overall health. Dialysis treatment may be adjusted as a patient's condition changes. Stopping dialysis should never be done without medical guidance. A nephrologist can explain the expected treatment duration for each patient.

Can kidney failure be treated without dialysis?

Some people with kidney disease can be managed without dialysis for a period of time. Treatment depends on the stage and cause of kidney disease. Medicines may help control blood pressure and other complications. Dietary changes can help manage fluid, sodium, potassium, or phosphorus levels. Doctors may recommend treatment for anemia or mineral and bone problems. Managing diabetes can also help protect remaining kidney function. Avoiding certain medicines that can harm the kidneys may be important. Regular blood and urine tests help monitor kidney function. Advanced kidney failure may eventually require kidney replacement therapy. Treatment options can include dialysis or kidney transplantation. Supportive kidney care may also be appropriate for some patients. A nephrologist can recommend the safest treatment based on individual health needs.

What happens if dialysis is delayed?

Delaying dialysis when it is medically necessary can cause serious complications. Waste products can build up in the blood. Excess fluid can accumulate in the body and lungs. High potassium levels can cause dangerous heart rhythm problems. Severe acid buildup can affect normal body functions. Increasing toxin levels can lead to nausea, confusion, or extreme weakness. Fluid overload can worsen swelling and breathing difficulties. Severe kidney failure can also affect the heart and other organs. Some complications may become life-threatening without timely treatment. However, dialysis is not started solely because kidney function is low. Doctors consider symptoms, blood tests, fluid status, and other clinical factors. Anyone with worsening kidney failure symptoms should seek prompt medical assessment.

Disclaimer: The information provided in this blog is intended for general knowledge and informational purposes only, and does not constitute medical advice. Always consult with a qualified healthcare professional for any medical concerns or before making any decisions about your health.