An artificial kidney, also called a dialyzer, is a specialized filter used during hemodialysis.

Healthy kidneys continuously remove waste products and excess fluid from the blood while helping regulate electrolytes and acid-base balance. When kidney function becomes severely impaired, hemodialysis can perform some of these filtration functions.

During hemodialysis, blood is circulated outside the body through a dialysis machine and passed through the dialyzer. The cleaned blood is then returned to the patient.

Hemodialysis does not completely replace every function of healthy kidneys, but it can remove certain waste products and excess fluid from the bloodstream.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized evaluation and management for patients who may require dialysis or other forms of kidney replacement therapy.

Why Is Hemodialysis Needed?

Hemodialysis may be required when the kidneys are no longer able to adequately maintain the body's internal balance.

It can be used in situations such as:

• Advanced chronic kidney disease

• Kidney failure

• Severe acute kidney injury

• Certain dangerous electrolyte abnormalities

• Severe fluid overload

• Significant acid-base disturbances

• Certain toxin or medication poisonings

Dialysis is not prescribed solely because a creatinine value is high. The decision depends on the patient's overall clinical condition and kidney function.

How Does the Artificial Kidney Work?

The dialyzer contains many tiny hollow fibers that act as a filtering membrane.

During treatment:

1. Blood leaves the body through a vascular access.

2. The dialysis machine pumps the blood through the dialyzer.

3. Waste products and excess substances move across the membrane into dialysis fluid.

4. Excess fluid can be removed through controlled ultrafiltration.

5. The filtered blood returns to the patient's circulation.

The process is carefully monitored throughout the session.

What Does the Artificial Kidney Remove?

Hemodialysis can help remove:

• Urea and other metabolic waste products

• Excess fluid

• Certain electrolytes in appropriate circumstances

• Some acidic substances

However, dialysis cannot reproduce every function of natural kidneys.

For example, healthy kidneys also contribute to hormonal functions and other processes that are not fully replaced by standard hemodialysis.

What Happens During a Hemodialysis Session?

A patient is connected to the dialysis machine through an appropriate vascular access.

The dialysis team monitors factors such as:

• Blood pressure

• Heart rate

• Blood flow

• Fluid removal

• Dialysis adequacy

• Symptoms during treatment

A hemodialysis session commonly lasts several hours, although the exact duration and schedule vary according to the patient's condition and prescribed treatment plan.

What Types of Vascular Access Are Used?

Blood must be safely removed and returned during hemodialysis.

Common vascular access options include:

Arteriovenous Fistula

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

It is often preferred for long-term hemodialysis because it can provide reliable blood flow and may have a lower infection risk than some alternatives.

Arteriovenous Graft

A graft uses a synthetic or biological material to connect an artery and vein.

It may be considered when a suitable fistula cannot be created or matured.

Dialysis Catheter

A catheter may be placed into a large vein.

Catheters can be useful when dialysis needs to begin urgently or while permanent access is being prepared, but they generally carry a higher infection risk than a well-functioning fistula.

Is Hemodialysis the Same as a Kidney Transplant?

No.

Hemodialysis is a form of kidney replacement therapy, while kidney transplantation involves placing a functioning donor kidney into the recipient.

A successful kidney transplant can provide more continuous kidney function than intermittent dialysis, but transplantation is not suitable for every patient.

The appropriate treatment depends on medical suitability, overall health and individual circumstances.

How Often Is Artificial Kidney Hemodialysis Needed?

The dialysis schedule is individualized.

Many people receiving conventional maintenance hemodialysis undergo treatment several times each week.

The exact frequency and duration depend on:

• Remaining kidney function

• Fluid accumulation

• Body size

• Medical condition

• Dialysis adequacy

• Laboratory results

• Type of dialysis program

The nephrologist determines the appropriate prescription.

Can Hemodialysis Be Temporary?

Yes.

Some people need dialysis temporarily after acute kidney injury.

If kidney function recovers sufficiently, dialysis may eventually be stopped.

In established kidney failure, however, long-term dialysis or kidney transplantation may be required unless kidney function improves or another suitable treatment becomes available.

What Are the Benefits of Hemodialysis?

When appropriately prescribed, hemodialysis can help:

• Remove accumulated waste products

• Remove excess fluid

• Correct certain electrolyte abnormalities

• Improve symptoms caused by kidney failure

• Help maintain internal chemical balance

• Support patients whose kidneys cannot perform these functions adequately

It can therefore be an important life-sustaining treatment for people with advanced kidney failure.

What Are the Possible Side Effects?

Some patients may experience symptoms during or after dialysis.

These can include:

• Low blood pressure

• Muscle cramps

• Fatigue

• Headache

• Nausea

• Dizziness

• Itching

• Access-related problems

The dialysis team can assess symptoms and adjust treatment when appropriate.

Repeated or severe symptoms should always be reported to the treating medical team.

What Complications Can Affect Dialysis Access?

Vascular access requires ongoing care.

Possible complications include:

• Infection

• Blood clotting

• Narrowing of the blood vessel

• Poor blood flow

• Bleeding

• Access failure

Patients should follow their dialysis team's instructions for protecting and monitoring the access.

Can Dialysis Cure Kidney Failure?

Hemodialysis does not cure chronic kidney failure.

Instead, it performs some of the functions that failing kidneys can no longer perform.

For selected patients with advanced kidney disease, kidney transplantation may offer an alternative form of kidney replacement.

For acute kidney injury, dialysis may sometimes be temporary if the kidneys recover.

What Happens If Too Much Fluid Builds Up?

When kidney function is severely reduced, the body may retain fluid.

This can lead to:

• Swelling of the legs or face

• Rapid weight gain

• High blood pressure

• Breathlessness

• Fluid in the lungs

Hemodialysis can remove excess fluid when clinically appropriate.

However, fluid removal must be carefully prescribed because removing fluid too rapidly can cause low blood pressure and other symptoms.

Diet and Fluid Management During Hemodialysis

People receiving hemodialysis often require individualized dietary and fluid guidance.

Depending on laboratory results and remaining kidney function, recommendations may involve:

• Limiting excessive sodium

• Managing fluid intake

• Adjusting potassium intake

• Monitoring phosphorus

• Ensuring adequate but appropriate protein intake

• Following prescribed nutritional recommendations

There is no single dialysis diet that is appropriate for every patient.

A renal dietitian may be involved when specialized dietary planning is needed.

What Is Dialysis Adequacy?

Dialysis adequacy refers to whether the prescribed treatment is effectively removing waste products and meeting the patient's treatment needs.

The healthcare team may assess:

• Blood-test results

• Urea reduction

• Dialysis dose

• Treatment duration

• Vascular access performance

• Fluid status

• Clinical symptoms

If dialysis is not adequate, the treatment prescription or access may need evaluation.

What Is the Role of the Nephrologist?

A nephrologist helps determine:

• Whether dialysis is necessary

• Which type of kidney replacement therapy is appropriate

• Dialysis prescription

• Vascular access planning

• Management of complications

• Dietary and fluid considerations

• Long-term kidney care

• Whether kidney transplantation should be considered

The decision to begin dialysis should be based on the complete clinical picture rather than a single laboratory value.

When Should a Dialysis Patient Seek Urgent Medical Care?

A person receiving hemodialysis should seek urgent medical attention for symptoms such as:

• Severe breathlessness

• Chest pain

• Fainting

• Confusion

• Severe weakness

• Very high or very low blood pressure

• Heavy bleeding from dialysis access

• Fever with suspected access infection

• Severe swelling

• Sudden deterioration in health

Prompt evaluation can be important when serious complications are suspected.

Artificial Kidney Hemodialysis at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation and management for patients with advanced kidney disease and kidney failure.

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

• Assessment of kidney function

• Evaluation for dialysis

• Hemodialysis management

• Acute kidney injury care

• Chronic kidney disease management

• Fluid and electrolyte management

• Vascular-access coordination

• Dialysis complication assessment

• Kidney transplant-related evaluation

Treatment decisions are individualized according to kidney function, symptoms, laboratory findings and overall health.

Frequently Asked Questions

What is an artificial kidney?

An artificial kidney usually refers to the dialyzer used during hemodialysis. It filters the blood outside the body to remove certain waste products and excess fluid.

Is an artificial kidney the same as a dialysis machine?

Not exactly. The dialyzer is the filtering component, while the dialysis machine controls blood flow, dialysis fluid, fluid removal and other treatment parameters.

How long does artificial kidney dialysis take?

A conventional hemodialysis treatment commonly lasts several hours, but the exact duration depends on the patient's individualized prescription.

Can a patient stop dialysis if kidney function improves?

Sometimes. Patients with acute kidney injury may recover enough kidney function to discontinue dialysis. People with established kidney failure generally require ongoing kidney replacement therapy unless they receive a successful transplant or otherwise regain sufficient kidney function.

Does hemodialysis completely replace the kidneys?

No. Hemodialysis performs some important kidney functions, particularly removal of waste and excess fluid, but it does not reproduce every function of healthy kidneys.

Is dialysis required whenever creatinine is high?

No. Dialysis decisions are based on the overall clinical situation, not creatinine alone.

What is better: hemodialysis or kidney transplant?

They are different treatment approaches. Transplantation may provide more continuous kidney function for suitable candidates, while hemodialysis is an established treatment for patients who require kidney replacement therapy. A nephrologist can discuss which options may be appropriate.

Conclusion

Artificial kidney hemodialysis is an important form of kidney replacement therapy for people whose kidneys cannot adequately remove waste products and excess fluid. The dialyzer acts as a specialized filter while the dialysis machine controls and monitors the treatment.

Hemodialysis may be temporary in some cases of acute kidney injury or may be required long term in advanced kidney failure. Treatment schedules, vascular access and dietary recommendations are individualized according to the patient's medical needs.

If you or a family member has advanced kidney disease and has been advised to consider dialysis, specialist evaluation can help determine the most appropriate kidney replacement strategy.

For individualized nephrology and dialysis-related care, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.

Medical Disclaimer

This article is intended for general educational and informational purposes only and does not constitute medical advice, diagnosis or treatment. Hemodialysis is a specialized medical treatment that must be prescribed and monitored by qualified healthcare professionals. The need for dialysis, treatment schedule, vascular access, fluid removal and dietary recommendations vary from patient to patient. Do not start, stop or change dialysis treatment based solely on information in this article. Seek urgent medical attention for severe breathlessness, chest pain, confusion, fainting, heavy bleeding from dialysis access, fever with suspected access infection or sudden deterioration in health. Consult Dr. Sandip Prabhakar Bhurke or another qualified nephrologist for individualized medical evaluation and treatment.