SYSTEM AND METHOD FOR IMPROVED GAS RECIRCULATION IN SURGICAL TROCARS WITH PNEUMATIC SEALING
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Accused Products
Abstract
Systems for insufflation and recirculation of insufflation fluid in a surgical procedure include a control unit having a fluid pump, a supply conduit, a return fluid conduit and a pressure-controlled valve. The pressure-controlled valve is in fluid communication with an insufflation gas supply, the supply conduit and the return conduit and is adapted and configured to respond to pressure control signals to adjust position and thereby system flow parameters, to reduce entrainment of air from the surrounding environment, and to increase the concentration of insufflation gas in an operative space, and/or to reduce an overpressure condition in the operative space.
4 Citations
22 Claims
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1-14. -14. (canceled)
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15. A surgical access device comprising:
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an elongated outer tubular member having opposed proximal and distal end portions and having a longitudinal axis extending therethrough, the outer tubular member having an open distal end; and an elongated inner tubular member having opposed proximal and distal end portions and being arranged coaxially within the outer tubular member, the inner tubular member having an open distal end and defining a central conduit, the central conduit extending through the center of the surgical access device and extending longitudinally to the open distal end of the inner tubular member for passage of a surgical instrument therethrough; wherein portions of the inner and outer tubular members are spaced apart to define an outer conduit for receiving gas; wherein a plurality of circumferentially spaced apart apertures extend through the distal end portion of the outer tubular member and are in communication with the outer conduit; wherein an outer surface of the distal end portion of the inner tubular member is in direct contact with an inner surface of the distal end portion of the outer tubular member to enclose a distal end of the outer conduit at a location where an inside diameter of the outer tubular member is smaller than an inside diameter of portions of the outer tubular member that are spaced apart from the inner tubular member; and wherein the open distal end of the outer tubular member is located beyond the open distal end of the inner tubular member. - View Dependent Claims (16)
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17. A surgical access device comprising:
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an elongated outer tubular member having opposed proximal and distal end portions and having a longitudinal axis extending therethrough, the outer tubular member having an open distal end; an elongated inner tubular member having opposed proximal and distal end portions and being arranged coaxially within the outer tubular member, the inner tubular member having an open distal end and defining a central conduit extending to the open distal end for passage of a surgical instrument therethrough; wherein portions of the inner and outer tubular members are spaced apart to define an outer conduit for receiving gas; wherein a plurality of circumferentially spaced apart apertures extends through the distal end portion of the outer tubular member and are in communication with the outer conduit; wherein an outer surface of the distal end portion of the inner tubular member is in direct contact with an inner surface of the distal end portion of the outer tubular member to enclose a distal end of the conduit at a location where an inside diameter of the outer tubular member is smaller than an inside diameter of portions of the outer tubular member that are spaced apart from the inner tubular member; and wherein the open distal end of the outer tubular member is located beyond the open distal end of the inner tubular member. - View Dependent Claims (18)
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19. A surgical access device comprising:
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an elongated inner tubular member having opposed proximal and distal end portions and having a longitudinal axis extending therethrough, the inner tubular member defining a central conduit having an open proximal end and an open distal end, the open proximal end of the central conduit and the open distal end of the central conduit being centered around a longitudinal central axis of the device for passage of a surgical instrument therethrough, the inner tubular member having an outer surface; an elongated outer tubular member having opposed proximal and distal end portions and being arranged coaxially about the inner tubular member, the inner tubular member and the outer tubular member defining an outer conduit for receiving gas, the outer tubular member having an inner surface; wherein the outer surface of the distal end portion of the inner tubular member and the inner surface of the distal end portion outer tubular member are in direct surface to surface contact with one another such that the distal end portion of the inner tubular member and the distal end portion of the outer tubular member cooperate with one another to enclose a distal end of the outer conduit; wherein a distal end of the outer tubular member is located beyond a distal end of the inner tubular member; and wherein the distal end portion of the outer tubular member defines a plurality of apertures extending through the outer tubular member in fluid communication with the outer conduit. - View Dependent Claims (20)
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21. A surgical access device comprising:
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a) an elongated outer tubular member having opposed proximal and distal end portions and having a longitudinal axis extending therethrough, the outer tubular member having an open distal end; b) an elongated inner tubular member having opposed proximal and distal end portions and being arranged coaxially within the outer tubular member, the inner tubular member defining a central conduit extending to an open distal end that is axially aligned with the open distal end of the outer tubular member, wherein the central conduit of the inner tubular member and the open distal end of the outer tubular member are dimensioned and configured for passage of a surgical instrument therethrough; c) an outer conduit defined between the inner and outer tubular members for receiving gas; and d) a plurality of circumferentially spaced apart apertures extending through a distal end portion of the outer tubular member in communication with the outer conduit, wherein an outer surface of the distal end portion of the inner tubular member and an inner surface of the distal end portion of the outer tubular member are in direct surface to surface contact with one another so that the distal end portion of the outer tubular member and the distal end portion of the inner tubular member cooperate with one another to enclose a distal end of the outer conduit, and wherein the open distal end of the outer tubular member is located distal to the open distal end of the inner tubular member. - View Dependent Claims (22)
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Specification