Haemodialysis

Haemodialysis

The hemodialysis process typically involves the following steps:

Hemodialysis is a medical procedure used to treat individuals with advanced kidney failure or end-stage renal disease (ESRD). It is a type of renal replacement therapy that helps remove waste products, excess fluids, and electrolytes from the blood when the kidneys are no longer able to perform these functions adequately.

During hemodialysis, blood is diverted from the patient’s body into a dialysis machine, also known as a dialyzer or artificial kidney. The dialyzer contains a semipermeable membrane that allows the exchange of substances between the patient’s blood and a special dialysis fluid (dialysate). The dialysate is carefully formulated to help remove waste and extra fluids from the blood while maintaining appropriate electrolyte levels.

  • Vascular Access: Before starting hemodialysis, a vascular access point needs to be established, usually in the form of an arteriovenous fistula, arteriovenous graft, or a central venous catheter. These access points allow for easy and safe removal of blood from the patient’s body and its return after filtering through the dialysis machine.

  • Blood Filtration: The patient is connected to the dialysis machine through the vascular access. Blood is pumped from the patient’s body into the dialyzer, where it passes through the semipermeable membrane. On the other side of the membrane, the dialysate removes waste products and excess fluids from the blood.

  • Fluid and Electrolyte Balance: The composition of the dialysate is controlled to ensure proper fluid and electrolyte balance during the process. This helps prevent complications like fluid overload or electrolyte imbalances.

  • Blood Return: After the blood is filtered and purified in the dialyzer, it is returned to the patient’s body through the vascular access.

Hemodialysis is usually performed in specialized dialysis centers, but in some cases, it can be done at home with appropriate training and support.

The frequency and duration of hemodialysis sessions can vary depending on the patient’s condition and the recommendation of their healthcare team. Typically, patients with ESRD require hemodialysis several times a week, and each session can last around 3 to 5 hours.

While hemodialysis is a life-saving treatment for individuals with kidney failure, it is not a cure for kidney disease. It is a long-term therapy that helps manage the condition and improve the patient’s quality of life. In some cases, kidney transplantation may be considered as a more permanent solution to kidney failure, but not all patients are eligible for transplantation or may choose not to undergo the procedure.

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