System and method for improved gas recirculation in surgical trocars with pneumatic sealing

• US 10,639,071 B2
• Filed: 06/13/2018
• Issued: 05/05/2020
• Est. Priority Date: 10/10/2008
• Status: Active Grant

• Current Assignee: Conmed Corporation (Jefferies Financial Group, Inc.)
• Original Assignee: Conmed Corporation (Jefferies Financial Group, Inc.)
• Inventors: Stearns, Ralph, Azarbarzin, Kurt, Nolan, Timothy J.
• Primary Examiner(s): Schmidt, Emily L
• Application Number:
  US16/007,637
• Publication Number:
  US 20180296245A1
• Time in Patent Office: 692 Days
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 17/3462 with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals expandable cannulas A61B17/3417
• CPC Class Codes: A61B 17/3474 Insufflating needles, e.g. Veress needles
• CPC Class Codes: A61B 17/3498 Valves therefor, e.g. flapper valves, slide valves haemostasis valves A61M39/06; check valves A61M39/24
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00544 pneumatically
• CPC Class Codes: A61M 13/003 Blowing gases other than for carrying powders, e.g. for inflating, dilating or rinsing
• CPC Class Codes: A61M 13/006 with gas recirculation
• CPC Class Codes: A61M 16/201 Controlled valves
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2205/3337 Controlling, regulating pressure or flow by means of a valve by-passing a pump

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.

Claims

1. A surgical access device comprising:

an elongated outer tubular member having opposed proximal and distal end portions and having a longitudinal axis extending therethrough, the distal end portion of the outer tubular member having a radially inwardly tapered distal tip section having an open distal end with an inner diameter; 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 with an inner diameter 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 for dispensing gas;

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;

wherein the open distal end of the outer tubular member is located beyond the open distal end of the inner tubular member;

wherein the open distal end of the outer tubular member is in a plane that is perpendicular to the longitudinal axis thereof; and

wherein the inner diameter of the open distal end of the outer tubular member is equal to the inner diameter of the open distal end of the inner tubular member.

2. The surgical access device as recited in claim 1, wherein the distal end portion of the inner tubular member defines a plurality of circumferentially spaced apart apertures extending through the inner tubular member to provide communication between the outer conduit and the central conduit.

3. A surgical access device comprising:

an elongated outer tubular member having opposed proximal and distal end portions and having a longitudinal axis extending therethrough, the distal end portion of the outer tubular member having a radially inwardly tapered distal tip section having an open distal end with an inner diameter;

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 with an inner diameter 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 for dispensing gas;

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;

wherein the open distal end of the outer tubular member is located beyond the open distal end of the inner tubular member;

wherein the open distal end of the outer tubular member is in a plane that is perpendicular to the longitudinal axis thereof; and

wherein the inner diameter of the open distal end of the outer tubular member is equal to the inner diameter of the open distal end of the inner tubular member.

4. The surgical access device as recited in claim 3, wherein the distal end portion of the inner tubular member defines a plurality of circumferentially spaced apart apertures extending through the inner tubular member to provide communication between the outer conduit and the central conduit.

5. A surgical access device comprising:

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 with an inner diameter, 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 therebetween 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 of the 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 section of the distal end portion of the outer tubular member is radially inwardly tapered, located beyond a distal end of the inner tubular member, and has an open distal end with an inner diameter;

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 for dispensing gas;

wherein the open distal end of the outer tubular member is in a plane that is perpendicular to the longitudinal axis thereof; and

wherein the inner diameter of the open distal end of the outer tubular member is equal to the inner diameter of the open distal end of the inner tubular member.

6. The surgical access device as recited in claim 5, wherein the distal end portion of the inner tubular member defines a plurality of circumferentially spaced apart apertures extending through the inner tubular member to provide communication between the outer conduit and the central conduit.

7. A surgical access device comprising:

a) an elongated outer tubular member having opposed proximal and distal end portions and having a longitudinal axis extending therethrough, the distal end portion of the outer tubular member having a radially inwardly tapered distal tip section having an open distal end with an inner diameter;

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, wherein the open distal end of the outer tubular member is located distal to the open distal end of the inner tubular member, and wherein the open distal end of the outer tubular member is in a plane that is perpendicular to the longitudinal axis thereof, and wherein the inner diameter of the open distal end of the outer tubular member is equal to an inner diameter of the open distal end of the inner tubular member.

8. The surgical access device as recited in claim 7, wherein the distal end portion of the inner tubular member defines a plurality of circumferentially spaced apart apertures extending through the inner tubular member to provide communication between the outer conduit and the central conduit.