Fluid management pump system for surgical procedures

A tube set for use with a control unit to supply fluid from a container to a surgical site, said tube set including:

• a cassette, said cassette having a coupling member for attaching said cassette to the control unit;
• an inflow tube for providing a conduit for the fluid from the container to the surgical site, said inflow tube extending through said cassette;
• an outflow tube for providing a conduit through which fluid is drained from the surgical site, said outflow tube extending through said cassette;
• a pressure feedback tube attached to said cassette for providing a conduit through which fluid representative of fluid pressure at the surgical site is applied to the control unit;
• first and second fluid control valves attached to said cassette, wherein:
• said first fluid control valve is associated with said inflow tube for regulating fluid flow therethrough;
• said second fluid control valve is associated with said outflow control valve for regulating fluid flow therethrough;
• and both said first and second control valves are open/closed by separate actuating members integral with the control unit;
• a feedback conduit integral with said cassette for providing a fluid communication path between said pressure feedback tube and the control unit, said feedback conduit having an opening directed towards the control unit;
• and
• a seal attached to said cassette around said opening of said feedback conduit so as to provide a fluid tight barrier between the control unit and said cassette around said opening of said feedback conduit.

A control unit for a fluid management pump system, the fluid management pump system including a tube set that includes:

• a cassette;
• an inflow tube that is connected to the cassette;
• an outflow tube that is connected to the cassette;
• a pump connected to the inflow tube to force solution through the inflow tube and connected to the cassette to receive energization signals therefrom;
• a first control valve mounted in the cassette for controlling solution flow through the inflow tube;
• a second control valve mounted in the cassette for controlling flow through the outflow tube;
• and an ID member in the cassette for storing data regarding the pump, said control unit including:
• a housing, said housing having a surface against which a back panel of the cassette is positioned and including a locking mechanism for releasably securing the cassette to said housing;
• first and second valve controllers mounted in said housing positioned to be adjacent said surface of said housing against which the cassette is seated, said first valve controller being positioned to open/close the first control valve of said tube set in response to an inflow control signal so as to control fluid flow through the inflow tube, and said second valve controller being positioned to open/close the second control valve of the tube set in response to an outflow control signal so as to control fluid flow through the outflow tube;
• and
• a pump controller disposed in said housing, said pump controller being connected to receive operator generated commands and to read the ID member in the cassette and being configured to generate energization signals to the pump through the cassette and to generate said inflow and outflow control signals to said first and second valve controllers and being configured to selectively generate energization signal to said pump and to control the open/closed states of said first and second control valves in response to the operator-generated commands and the data contained in the ID member.

A pressure sensing cannula for a fluid management system for receiving an endoscope with an elongated main body, said pressure sensing cannula including:

• a cannula body with opposed ends and a bore for extending between said opposed ends for receiving the endoscope;
• an elongated cannula tube extending from one end of said cannula body, said cannula tube having a bore extending therethrough that is in communication with said bore of said main body so that said main body of the endoscope can extend through said cannula bore, said bore being centered around an elongated cannula tube axis;
• and
• wherein said cannula body is formed to have a socket at said end opposite said end from which said cannula tube extends for receiving the endoscope, said cannula body being formed so that said socket is axially offset from said axis of said cannula tube so that when the endoscope is seated in said bore of cannula tube, the main body of the endoscope is axially offset from said axis of said cannula tube.