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What is Dialysis and why is it done?

Dialysis is a medical procedure that serves as a substitute for the normal functioning of the kidneys when they are no longer able to effectively filter waste products and excess fluids from the blood. It is primarily used to treat individuals with kidney failure or end-stage renal disease (ESRD), a condition where the kidneys have lost their ability to sufficiently perform their vital functions.

The kidneys play a vital role in maintaining the body’s internal balance by filtering the blood, removing waste products, excess salts, and fluids, and regulating electrolyte levels. When the kidneys are severely damaged or fail, these waste products and fluids can accumulate in the body, leading to a range of health issues, including high blood pressure, electrolyte imbalances, and fluid overload.

Dialysis helps replicate the kidney’s filtration function by removing waste products and excess fluids from the bloodstream.


There are two primary types of dialysis:

  1. Hemodialysis: In hemodialysis, the patient’s blood is pumped through a dialysis machine, also known as a dialyzer. Inside the dialyzer, the blood passes through a special filter called a dialyzer membrane. On the other side of the membrane, a cleansing solution (dialysate) flows. The dialysate helps draw waste products and excess fluids out of the blood through the process of diffusion and osmosis. Once the blood is cleaned, it is returned to the patient’s body. Hemodialysis is typically performed at a specialized dialysis center and requires several sessions per week. Visit a Urologist in Karachi for more information.
  2. Peritoneal Dialysis: Peritoneal dialysis is a different approach where the patient’s own abdominal lining (peritoneum) acts as the natural filter. A cleansing fluid, called dialysate, is introduced into the abdominal cavity through a catheter. Waste products and excess fluids from the blood diffuse into the dialysate, which is then drained out after a specific period. Peritoneal dialysis can be done at home and offers more flexibility in terms of treatment timing.

Why is Dialysis Done?

Dialysis is done to achieve several important goals:

  • Waste Removal: The procedure helps remove waste products such as urea, creatinine, and other toxins from the bloodstream, which accumulate due to kidney dysfunction.


  • Fluid Balance: Dialysis helps manage fluid levels in the body, preventing fluid overload that can lead to complications like heart failure and pulmonary edema.


  • Electrolyte Regulation: Dialysis helps maintain proper electrolyte levels, such as potassium, sodium, and calcium, which are essential for nerve and muscle function.


  • Blood Pressure Control: By regulating fluid and electrolyte balance, dialysis can contribute to better blood pressure management.


  • Acid-Base Balance: Dialysis helps maintain the body’s acid-base balance, which is vital for various physiological processes.

Dialysis is a life-saving procedure for individuals with end-stage renal disease, and it can significantly improve their quality of life. However, it is not a cure for kidney failure. In many cases, a kidney transplant may be considered as a long-term solution to replace the function of the failed kidneys. The decision between dialysis and transplantation depends on factors such as the patient’s overall health, age, and available resources.

Regular dialysis treatments require a significant commitment from patients, and they often need to make adjustments to their lifestyle and dietary habits to manage their condition effectively. Proper medical supervision and adherence to treatment recommendations are essential to ensure the best possible outcomes for individuals undergoing dialysis. Book an appointment with a Best Urologist in Lahore today to get your dialysis done.

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