Monday, September 17, 2012
Introduction of medical devices
Hemodialysis concentrates , referred to hemodialysis, also known as the popular saying artificial kidney, dialysis is a blood purification technology. The principle of using semi-permeable membrane, by diffusion, convection, and the body of harmful metabolic wastes and excess electrolytes too much out of the body, to achieve the purpose of purifying the blood and suck up water and electrolyte and acid-base balance correction purposes. Hemodialysis uses semi-permeable membrane thickness of 10-20 microns, the average membrane pore size of 3 nm, so only the molecular weight of 15,000 to small molecules and molecules by section, and the large molecular weight greater than 35,000 molecules can not.
Surgical lights is a special feature of light. The light from the invention and application have to talk about 1809, British chemist David invented the arc light, humanity has entered the era of the use of electric lighting. In 1879, Elastic bandage is woven with natural fibers, material is soft, flexible high. Elastic bandage Use: mainly used for surgical dressings care. Extensive use of elastic bandages, body parts topical dressing, field training, first aid and other trauma can feel all the benefits of this bandage.
Stretch Bandage advantages: high flexibility, joints unrestricted activity after use, do not shrink, will not hinder blood circulation or a breathable material to make good joints displacement, condensation will not make the wound, and easy to carry.the California Theater in the United States, the first human use of arc lamps (electric arc light). In 1906, Edison invented the tungsten filament home for the electric light bulb.Installed on the ceiling of the surgical lights, ceiling or wall should be on the remote control box to set one or more transformers to the input supply voltage into low voltage required by the majority of light bulbs.