Patent ID: 7736335

Claim:
A surgical irrigation pump arrangement comprising: a cabinet, said cabinet having an opening; first and second plates disposed in said cabinet, said first plate being movable towards and away from said second plate so as to define a varying volume bag well between said first and second plates, said varying volume bag well being accessible through said opening in said cabinet; a drive assembly disposed in said cabinet and attached to said first plate for moving said first plate; a user interface including a bag-size control configured for actuation by a user to allow selection of a first fluid bag size or a second fluid bag size of a different volume than a volume of the first fluid bag size; a control unit in communication with said bag-size control and connected to said drive assembly, said control unit actuating said drive assembly to move said first plate to a first position wherein said first plate is spaced from said second plate a first distance sufficient to accommodate the first fluid bag size in said varying volume bag well when said bag-size control indicates a user selection of the first fluid bag size, said control unit actuating said drive assembly to move said first plate to a second position wherein said first plate is spaced from said second plate a second distance different from the first distance and sufficient to accommodate the second fluid bag size in said varying volume bag well when said bag-size control indicates a user selection of the second fluid bag size, said control unit actuating said drive assembly to move said first plate towards said second plate to compress a fluid bag disposed in said varying volume bag well, said control unit preventing operation of said drive assembly when the first fluid bag size is selected and said first plate is in said first position and a user attempts to place a fluid bag corresponding to the second fluid bag size in said varying volume bag well, and said control unit preventing operation of said drive assembly when the second fluid bag size is selected and said first plate is in said second position and a fluid bag corresponding to the first fluid bag size is located in said varying volume bag well.