Dialysis is a technique for purifying solutions. In particular, medicine, dialysis is a method for purifying blood through a membrane.
The principle is to separate two solutions by a membrane. We distinguish different types of membrane (semipermeable membrane that lets the solvent), dialysis (pore diameter of nanometer nm, identical and known) that let the solvent and solutes below a certain size. For diffusion effect (due to molecular agitation) small molecules pass through the membrane, while large molecules (usually macromolecules) will be retained on one side. This system can be automated in the form of dialysis equipment such as medical (nephrology) for persons suffering from kidney failure, but the principle remains the same. The product of a dialysis solution (collection of small molecules) is called a dialysate.
Types of dialysis
* Peritoneal dialysis uses the peritoneum.
* Hemodialysis is a circuit cardiopulmonary bypass.
* The continuous hemofiltration dialysis technique in 24/24 and several days if necessary, existing since the early 1990s in the intensive care unit for patients requiring renal replacement and whose blood pressure is weak. It can "cleanse" the blood of harmful substances and water to remove excess cells. it is often used in cases of septic shock, of acute pulmonary edema (excess water), anuria in cases of hemodynamic instability.
Read also Chronic kidney disease