# US 12,004,774 B2 · Gas circulation system with gas sealed access cap and valve sealed access cap for robotically assisted surgical procedures > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,774 B2 - Document ID: US12004774B2 - Status: Granted - Kind: B2 - Application number: 17/841,865 - Filed: 2022-06-16 - Published: 2022-09-29 - Granted: 2024-06-11 - Earliest claimed: 2019-03-26 - Assignees: Conmed Corporation - Applicants: Conmed Corporation - Inventors: Emily Thompson; Corey London Brenner - Web page: https://patentgrep.com/patent/US12004774B2 ## CPC - A61B 17/3421: {Cannulas} - A61B 17/3423: {Access ports, e.g. toroid shape introducers for instruments or hands (access sites for liquids A61M39/0247)} - A61B 17/00234: {for minimally invasive surgery (A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence)} - 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)} - A61B 17/3474: {Insufflating needles, e.g. Veress needles} - A61B 17/3498: {Valves therefor, e.g. flapper valves, slide valves (haemostasis valves A61M39/06; check valves A61M39/24)} - A61B 34/30: Surgical robots - A61B 34/70: {Manipulators specially adapted for use in surgery} - A61B 18/12: by passing a current through the tissue to be heated, e.g. high-frequency current - A61B 2017/3464: {with means acting on inner surface of valve or seal for expanding or protecting, e.g. inner pivoting fingers} - A61B 2034/302: {specifically adapted for manipulations within body cavities, e.g. within abdominal or thoracic cavities} - A61B 2090/064: {for measuring force, pressure or mechanical tension} - A61B 2218/008: for smoke evacuation - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A gas circulation system is disclosed for performing robotically assisted surgical procedures in a surgical cavity of a patient, which includes a multi-lumen tube set including a dual lumen portion having a pressurized gas line and a return gas line, and a single lumen portion having a gas supply and sensing line, a valve sealed access cap for cooperative reception with a first robotic cannula and having an inlet path for communicating with the gas supply and sensing line of the tube set, and a gas sealed access cap for cooperative reception with a second robotic cannula and having an inlet path for communicating with the pressurized gas line of the tube set and an outlet path for communicating with the return gas line of the tube set. ## Claims ### Claim 1 A gas sealed access cap for a robotic cannula comprising: a) a housing comprising an inlet port, an outlet port, and an interior cavity, the housing having a lid defining a central access port configured to extend to the interior cavity, the interior cavity configured to support an annular jet assembly, the annular jet assembly configured for receiving pressurized gas from the inlet port of the housing, wherein the annular jet assembly includes a central aperture configured to be aligned with the central access port of the lid and is adapted to generate a gaseous sealing zone within the robotic cannula to maintain a stable pressure within the surgical cavity of a patient; b) a plurality of circumferentially spaced apart radially inwardly extending vanes formed integral with the housing and located within the interior cavity, the vanes being configured for directing spent gas from the gaseous sealing zone to the outlet port of the housing; and c) a central access tube configured to be aligned with the central access port of the lid and the central aperture of the annular jet assembly, and extending distally from the interior cavity of the housing below the vanes for communicating with a tubular portion of the robotic cannula, wherein the housing of the access cap is dimensioned and configured for reception within a proximal bowl portion of the robotic cannula. ### Claim 2 (depends on 1) The gas sealed access cap recited in claim 1, further comprising a pair of diametrically opposed flexible clips, wherein the pair of diametrically opposed flexible clips are formed integral with an exterior surface of the housing for releasably securing the access cap to the proximal bowl portion of the robotic cannula. ### Claim 3 (depends on 1) The gas sealed access cap recited in claim 1, further comprising a sound attenuating disc, wherein the sound attenuating disc is configured to be positioned within the housing between the lid and the annular jet assembly. ### Claim 4 (depends on 3) The gas sealed access cap recited in claim 3, wherein the sound attenuating disc is formed from a foam material. ### Claim 5 (depends on 1) The gas sealed access cap recited in claim 1, further comprising a mounting flange, wherein the inlet port of the housing and the outlet port of the housing are positioned within the mounting flange, and the mounting flange is formed on an exterior surface of the housing. ### Claim 6 (depends on 5) The gas sealed access cap recited in claim 5, further comprising a manifold, wherein the manifold is configured to be operatively associated with the mounting flange. ### Claim 7 (depends on 6) The gas sealed access cap recited in claim 6, wherein the manifold is formed separate from the housing of the access cap. ### Claim 8 (depends on 6) The gas sealed access cap recited in claim 6, wherein the manifold includes a multi-lumen bullseye connector. ### Claim 9 (depends on 1) The gas sealed access cap recited in claim 1, wherein a distal end of the housing extends distally beyond a distal end of the central access tube. ### Claim 10 (depends on 1) The gas sealed access cap recited in claim 1, wherein a distal end of the central access tube extends distally beyond a distal end of the housing. ### Claim 11 (depends on 1) The gas sealed access cap recited in claim 1, further comprising an outer O-ring seal, wherein the outer O-ring seal is configured to surround a distal portion of the housing to provide a seal between the housing and the proximal bowl portion of the robotic cannula. ### Claim 12 A gas sealed access cap for a robotic cannula comprising: a) a housing comprising an inlet port, an outlet port, and an interior cavity, the housing having a lid defining a central access port configured to extend to the interior cavity, the interior cavity configured to support an annular jet assembly, the annular jet assembly configured for receiving pressurized gas from the inlet port of the housing, wherein the annular jet assembly includes a central aperture configured to be aligned with the central access port of the lid and is adapted to generate a gaseous sealing zone within the robotic cannula to maintain a stable pressure within the surgical cavity of a patient; b) a plurality of circumferentially spaced apart radially inwardly extending vanes formed integral with the housing and located within the interior cavity, the vanes being configured for directing spent gas from the gaseous sealing zone to the outlet port of the housing; and c) a central access tube configured to be aligned with the central access port of the lid and the central aperture of the annular jet assembly, and extending distally from the interior cavity of the housing below the vanes for communicating with a tubular portion of the robotic cannula, wherein a distal end of the central access tube extends distally beyond a distal end of the housing and wherein the housing of the access cap is dimensioned and configured for reception within a proximal bowl portion of the robotic cannula. ### Claim 13 (depends on 12) The gas sealed access cap recited in claim 12, further comprising a pair of diametrically opposed flexible clips, wherein the pair of diametrically opposed flexible clips are formed integral with an exterior surface of the housing for releasably securing the access cap to the proximal bowl portion of the robotic cannula. ### Claim 14 (depends on 12) The gas sealed access cap recited in claim 12, further comprising a sound attenuating disc, wherein the sound attenuating disc is configured to be positioned within the housing between the lid and the annular jet assembly. ### Claim 15 (depends on 14) The gas sealed access cap recited in claim 14, wherein the sound attenuating disc is formed from a foam material. ### Claim 16 (depends on 12) The gas sealed access cap recited in claim 12, further comprising a mounting flange, wherein the inlet port of the housing and the outlet port of the housing are positioned within the mounting flange, and the mounting flange is formed on an exterior surface of the housing. ### Claim 17 (depends on 16) The gas sealed access cap recited in claim 16, further comprising a manifold, wherein the manifold is configured to be operatively associated with the mounting flange. ### Claim 18 (depends on 17) The gas sealed access cap recited in claim 17, wherein the manifold is formed separate from the housing of the access cap. ### Claim 19 (depends on 17) The gas sealed access cap recited in claim 17, wherein the manifold includes a multi-lumen bullseye connector. ### Claim 20 (depends on 12) The gas sealed access cap recited in claim 12, further comprising an outer O-ring seal, wherein the outer O-ring seal is configured to surround a distal portion of the housing to provide a seal between the housing and the proximal bowl portion of the robotic cannula.