Dialyzer is a medical device that removes toxins and excess fluid from the blood of patients who have kidney failure. This device is also known as an artificial kidney, hemodialyzer, or blood filter. The process of dialysis helps in filtering waste products from the blood to keep the body's fluids and electrolytes in balance. The term dialyzer is often used interchangeably with other terms such as renal dialysis machine, renal replacement therapy equipment, or hemodialysis system. Regardless of the term, the primary purpose of the device remains the same - removing harmful toxins from the body to keep the patient alive and healthy.