Water Purification Systems, Reverse Osmosis, Hemodialysis
Definition : Reverse osmosis (RO) water purification systems designed to deliver water pure enough for hemodialysis procedures. These systems typically consist of a container with a central semi-permeable membrane separating the contaminated water from the purified water. Hydrostatic pressure high enough to exceed the osmotic pressure is then applied to the contaminated water section. The membrane is permeable to water but impermeable to the solutes thus providing purified water on the other side of the membrane. RO systems used in hemodialysis remove salts, metal ions, and particulates to a greater degree than standard RO systems. Water obtained after the procedure should be tested periodically due to the high volume of water that patients are exposed to during hemodialysis in which even trace quantities of contaminants (e.g., aluminum) may be dangerous. The elimination of chloramines (e.g., using a carbon bed) present in tap water is also essential. Hemodialysis reverse osmosis is usually performed after filtration to eliminate particulates from the incoming water. Deionization, ultrafiltration, and/or disinfection with ultraviolet radiation may be needed after reverse osmosis if the presence of contaminants is high due to the fact that RO removes percentages (e.g., 95 to 99 percent) rather than fixed quantities of contaminants. Portable hemodialysis RO systems are also available.
Entry Terms : "Hemodialysis Water Purification Systems, Reverse Osmosis" , "Reverse Osmosis Hemodialysis Water Purification Systems"
UMDC code : 20682