Hemodialysis

Hemodialysis uses a specialized dialysis machine and a filter called a dialyzer to clean the blood. During treatment, blood is gradually removed from the body, passed through the dialyzer to remove waste and excess fluid, and then returned to the patient.

Hemodialysis can be performed in a dialysis center or, for selected patients, at home with appropriate medical support and training.

The treatment schedule depends on the patient's kidney function, medical condition, fluid balance, laboratory results, and the dialysis plan recommended by the nephrologist.

Conditions That May Require Hemodialysis

Hemodialysis may be recommended for patients with:

• End-stage kidney disease

• Advanced chronic kidney disease

• Severe or prolonged acute kidney injury

• Significant fluid overload that cannot be adequately controlled with medication

• Dangerous electrolyte abnormalities, particularly severe hyperkalemia

• Severe metabolic disturbances related to kidney failure

• Certain cases of poisoning or drug toxicity when dialysis can effectively remove the substance

• Kidney failure associated with severe complications requiring renal replacement therapy

Kidney failure can develop gradually or occur suddenly. Symptoms may include:

• Persistent fatigue and weakness

• Swelling in the legs, feet, or around the eyes

• Reduced urine output or significant changes in urination

• Shortness of breath due to fluid accumulation

• Nausea or vomiting

• Loss of appetite

• Itching

• Muscle cramps

• Difficulty concentrating or confusion

• High blood pressure

• Sleep disturbances

Common causes of advanced kidney disease include diabetes, high blood pressure, chronic kidney diseases, inherited kidney disorders, recurrent kidney injury, and other conditions that progressively damage kidney function.

Before starting hemodialysis, the patient undergoes a detailed medical assessment. This may include:

• Blood tests to evaluate kidney function and electrolyte levels

• Urine tests when appropriate

• Assessment of fluid balance and blood pressure

• Kidney imaging when required

• Evaluation of cardiovascular health and other medical conditions

• Assessment of the appropriate vascular access for dialysis

Hemodialysis requires vascular access through which blood can safely leave and return to the body. Common types include:

• Arteriovenous (AV) fistula

• Arteriovenous (AV) graft

• Central venous dialysis catheter, which may be used when dialysis is needed urgently or while more permanent access is being prepared

During a dialysis session, blood passes through the dialyzer, where waste products and excess fluid are removed before the cleaned blood is returned to the body.

Benefits of Hemodialysis

Hemodialysis can help:

• Remove waste products from the blood

• Control excess fluid accumulation

• Maintain safer electrolyte levels

• Help manage complications of advanced kidney failure

• Reduce symptoms related to toxin and fluid buildup

• Support patients whose kidneys can no longer adequately perform these functions

For patients with end-stage kidney disease, hemodialysis can serve as a long-term form of kidney replacement therapy while they continue treatment or are evaluated for kidney transplantation when appropriate.

Recovery & Ongoing Care

Hemodialysis is generally an ongoing treatment rather than a one-time procedure for patients with permanent kidney failure.

The frequency and duration of dialysis sessions vary depending on the patient's medical condition and treatment plan. Many patients receiving maintenance hemodialysis undergo several sessions each week.

Patients may experience fatigue, muscle cramps, changes in blood pressure, or other temporary symptoms during or after dialysis. Regular monitoring of blood tests, weight, blood pressure, fluid intake, medications, nutrition, and vascular access is an important part of ongoing care.

Is Hemodialysis Suitable for Everyone?

Hemodialysis is not automatically required for every patient with reduced kidney function. The decision depends on kidney function, symptoms, laboratory results, fluid status, complications, overall health, and whether kidney function may recover.

A nephrologist determines whether dialysis is necessary and whether hemodialysis is the most appropriate form of kidney replacement therapy. Depending on the patient's condition, other options may include peritoneal dialysis or kidney transplantation.