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Info & Treatments for Kidney Stones & Kidney Disease
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Dialysis, the artificial removal of accumulated waste materials and toxins from the blood as a treatment for acute renal failure, is performed in two different ways, called hemodialysis and peritoneal dialysis. Hemodialysys, the more common method, makes use of a dialysis machine and is almost always done in a clinical or hospital setting. The patient's blood is removed from his body using a catheter, treated by the machine, and returned to the patient's body with accumulated wastes cleaned from it. In this way, a patient can be kept alive and in fairly good health despite the loss of kidney function.
The process of hemodialysis involves running the patient's blood through a machine that cleanses it of waste materials. The machine works using the principle of diffusion. This principle holds that solutes dissolved in a liquid will move from an area of higher concentration to one of lower concentration, even if the liquids are not actually mixed, provided they are not completely separated by impermeable barriers or distance.
Hemodyalisis employs a liquid called a dialysate, which is composed with a view to what contaminates need to be removed from the blood and which other solutes need to remain as they are.
The dialysate is low in concentration of, or completely lacking in, materials to
be removed from the blood. A semi-
Contaminants flow across the membrane from the blood to the dialysate. The used dialysate
is then returned to a container and replaced with fresh dialysate, while the cleansed
blood is returned to the patient's body. The primary substances to be removed from
the blood in dialysis are urea (or blood urea nitrogen -
Because sufferers from renal failure often pass little or no urine, the blood accumulates
excess water as well as waste materials. Hemodialysis usually seeks to remove this
excess water from the blood alone with BUN, creatinine, and other solutes. If too
much water is removed during the process, or if the water is removed too quickly,
the patient can suffer from low blood pressure, fatigue, cramps, nausea, and headaches.
These symptoms can occur during treatment and can endure after the treatment is completed.
This is a common side-
The other form of dialysis, peritoneal dialysis, makes use of the peritoneum (the membrane surrounding the abdominal cavity) instead of an artificial membrane. The blood is not removed from the body. Each method has advantages and disadvantages. With hemodialysis, the process is quicker and more efficient, and so it can be done less often and take up less time during the day. On the downside, hemodialysis does not lend itself to use by the patient at home. It is normally done in an outpatient setting, and while the process is taking place the patient is attached to the machine and can't do much besides undergo the dialysis.
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|Protein in Urine|
|Glomerular Filtration Rate|
|Beat Kidney Disease|