Patent ID: 6817984
Filing Date: 2004-11-16
Classification: A61M

Abstract:
An integrated blood processing system comprising a housing, a door mounted thereto and a disposable cassette, wherein:the housing has a front side having operator-available controls exposed thereon and a signal processor enclosed in an interior thereof, the controls being connected in signal transferring relation to the signal processor, a plurality of roller pump roller assemblies mounted about a single axis and in close lateral relation to one another, the roller assemblies having circumferences which extend through a first opening adjacent to the housing front side, the first opening being of a size and shape sufficient to allow free passage of the roller assemblies circumferences, motivating means for independently motivating each of the roller assemblies to rotate about the single axis, the motivating means being in signal transmitting relation to the signal processor, a plurality of parallel plungers mounted to a corresponding plurality of independently controllable plunger motivating valves the plungers each having a contact end which can be extended by the respective valve, a second opening defined in the housing front side, the second opening being of a size and shape sufficient to allow free passage of the plungers, the plungers being spaced from one another, and the plungers being in signal transmitting relation to the signal processor; the door being selectively positioned to expose or close a plurality of recessed roller backing portions, the roller backing portions being arcuate in shape and being separated by ridges from one another, the door, when closed, being latched against the housing front side; the cassette having a body which is mountable between the door and the housing and resilient tubing mounted to the body, the body and the tubing mounted thereto being positioned between the door and the housing when the door is open and being firmly held in place between the door and the housing when the door is thereafter closed with the tubing then having a plurality of pumping portions thereof in contact with the circumferences of the respective rollers and in contact with the corresponding roller backing portions, the cassette having a plurality of flow shut-off portions positioned to shut off flow through the tubing on selected movement of the plunger contact ends into flow blocking relation thereto, whereby selective pumping is enabled at each pumping portion and whereby selective closure is provided at each flow shut off portion.