About Dialysis
In case of kidney failure such as advanced chronic kidney disease, your kidneys may not be able to clean the blood properly. Waste products and fluids can build up to dangerous levels in your body. If left untreated, this can cause unpleasant symptoms and eventual death. Dialysis will filter out unwanted substances and fluids from the blood before this happens. People who have kidney failure, or end-stage renal disease (ESRD), may need dialysis. Also, injuries and conditions such as high blood pressure, diabetes, and lupus can damage kidneys, leading to kidney disease. Kidney failure can happen over time or come on suddenly (acute) after a severe illness or injury. Acute kidney failure could go away as you recover. Kidney disease has 5 stages. If you are at stage 5, you may be experiencing end-stage renal disease (ESRD) or kidney failure. At this point, kidneys are carrying out around 10% to 15% of their normal function. You may need dialysis or a kidney transplant to stay alive. Some people undergo dialysis while waiting for a transplant.
What is dialysis?
Dialysis is a medical procedure that performs the function of the kidneys when they are no longer able to work effectively. The kidneys are vital organs that filter waste, excess fluid, and toxins from the blood, helping to regulate blood pressure, electrolyte balance, and red blood cell production. When the kidneys fail, due to conditions such as chronic kidney disease or acute kidney injury, dialysis can be used to perform these essential tasks.
There are two main types of dialysis: hemodialysis and peritoneal dialysis. Hemodialysis involves circulating the patient’s blood through a machine called a dialyzer or artificial kidney. The dialyzer has a semi-permeable membrane that allows waste products and excess fluids to pass out of the blood and into a dialysate solution. This cleaned blood is then returned to the patient’s body.
Peritoneal dialysis, on the other hand, uses the patient’s own body as the dialyzer. A catheter is surgically placed in the abdomen, and a special fluid called dialysate is infused into the peritoneal cavity. The peritoneum, the lining of the abdomen, acts as a semi-permeable membrane, allowing waste products and excess fluid to pass from the blood into the dialysate. The dialysate is then drained from the abdomen, removing the waste products and excess fluid from the body.
Dialysis can be a life-saving treatment for people with kidney failure, but it is not without its challenges. It requires a significant time commitment, with hemodialysis typically performed three times a week for about four hours at a time, and peritoneal dialysis performed daily. It can also come with side effects such as low blood pressure, infection, and fatigue.
What do the kidneys do?
The kidneys are vital organs in the human body with several important functions. They are bean-shaped structures, each about the size of a fist, located on either side of the spine, just below the rib cage.
One of the primary roles of the kidneys is to filter waste products, toxins, and excess substances from the blood. Every day, the kidneys filter about 120 to 150 quarts of blood to produce about 1 to 2 quarts of urine. This urine contains wastes and extra fluid, which are removed from the body through the urinary system.
The kidneys also play a crucial role in maintaining the body’s electrolyte balance. Electrolytes, such as sodium, potassium, and phosphate, are minerals that carry an electric charge and are essential for various bodily functions, including maintaining heart rhythm, muscle contraction, and brain function. The kidneys help regulate the levels of these electrolytes in the body.
In addition to waste removal and electrolyte balance, the kidneys also regulate the body’s fluid balance. They adjust the volume and composition of body fluids by either reabsorbing water back into the blood or excreting it as urine.
Another important function of the kidneys is the production of hormones. They produce erythropoietin, a hormone that stimulates the production of red blood cells in the bone marrow. They also produce renin, a hormone that helps regulate blood pressure, and they convert vitamin D into its active form, which aids in calcium absorption and bone health.
What is hemodialysis?
Hemodialysis is a type of dialysis, a medical procedure that performs the function of the kidneys when they are unable to do so effectively. Hemodialysis is the most common method used to treat advanced and permanent kidney failure. It involves circulating the patient’s blood outside of the body through a machine known as a dialyzer or an artificial kidney.
The dialyzer is a special filter that removes waste products, excess substances, and fluid from the blood. The cleaned blood is then returned to the patient’s body. This process helps to control blood pressure and balance important minerals in the blood, such as potassium, sodium, and calcium.
Hemodialysis is typically performed in a dialysis center or hospital by trained healthcare professionals. Each session lasts about four hours, and patients usually require three sessions per week. However, the frequency and duration can vary depending on the patient’s health condition and the doctor’s recommendations.
While hemodialysis can significantly improve the quality of life for people with kidney failure, it does come with challenges. It requires a significant time commitment, which can impact the patient’s lifestyle. Potential side effects include low blood pressure, anemia, bone diseases, high blood pressure, and depression. It’s also possible for the access site where the blood is removed and returned to become infected or blocked.
Despite these challenges, advancements in technology and treatment strategies have made hemodialysis safer and more efficient over the years. For instance, the development of new dialyzer membranes and advances in machine technology have improved the effectiveness of hemodialysis.
How long will dialysis be needed?
For some, kidney failure may be a temporary problem and dialysis can be stopped as the kidneys recover. But more often, those with kidney failure will need to have a kidney transplant. Since a kidney transplant isn’t always available as needed, dialysis may be needed until a suitable donor kidney becomes available. If you are not well enough to have a major operation, you may need dialysis for the rest of your life.
Dialysis Side Effects
Dialysis Recovery
Patients usually report post-dialysis recovery time between 2-4 hours, while some report a 6-hour recovery.