Abstract:
As one administers blood through a conduit (10) into a container (12), the blood is passed in the conduit across the supply of beneficial agent (18), such as anticoagulant, to cause a controlled amount of beneficial agent to enter the passing blood in a manner that is substantially uniform overtime. The beneficial agent (18) is typically in dry form until it enters into contact with the blood. Accordingly, no substantial portion of the blood is exposed to a significantly higher concentration of the beneficial agent than other portions of the blood.
Abstract:
A thin film (10) or layer (10) of white blood cells, such as the contaminating w hite cells in a platelet concentrate, is irradiated with ultraviolet radiation predominantely of a wavelength of 280 to 320 nanomet ers, and preferably at an intensity of 4 to 20 milliwatts per square cm. to provide a total energy exposure of typically 800 to 20,000 millijoules per square cm. of ultraviolet radiation. The white blood cells so processed substantially lose their capabilit y to set off an immune reaction in an alloimmunized patient. The white blood cells may preferably be placed into such film in a flat (10), flexible bag (10) made of poly(ethylene-vinyl acetate) plastic, with the flat (10), flexible bag (10) being stretched in a dir ection normal to the path of ultraviolet radiation. Novel irradiating devices (40) are also disclosed.
Abstract:
A thin film or layer of white blood cells, such as the contaminating white cells in a platelet concentrate, is irradiated with ultraviolet radiation predominately of a wavelength of 280 to 320 nanometers, and preferably at an intensity of 4 to 20 milliwatts per square cm. to provide a total energy exposure of typically 800 to 20,000 millijoules per square cm. of ultraviolet radiation. The white blood cells so produced substantially lose their capability to set off an immune reaction in an alloimmunized patient. The white blood cells may preferably be placed into such film in a flat, flexible bag made of poly(ethylene-vinyl acetate) plastic, with the flat, flexible bag being stretched in a direction normal to the path of ultraviolet radiation. Novel irradiating devices are also disclosed.
Abstract:
As one administers blood through a conduit into a container, the blood is passed in the conduit across the supply of beneficial agent, such as anticoagulant, to cause a controlled amount of beneficial agent to enter the passing blood in a manner that is substantially uniform over time. The beneficial agent is typically in dry form until it enters into contact with the blood. Accordingly, no substantial portion of the blood is exposed to a significantly higher concentration of the beneficial agent than other portions of the blood.