# US 2023/0404666 A1 · Inflow and outflow control of a closed cooling system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0404666 A1 - Document ID: US20230404666A1 - Status: Published application - Kind: A1 - Application number: 18/460,756 - Filed: 2023-09-05 - Published: 2023-12-21 - Earliest claimed: 2019-09-11 - Assignees: Covidien LP - Applicants: Covidien LP - Inventors: William J. Dickhans; Jiagui Li; Zhiwei Lin - Web page: https://patentgrep.com/patent/US20230404666A1 ## CPC - A61B 18/1815: {using microwaves} - A61B 18/04: by heating (by applying electromagnetic radiation A61B18/18) - A61B 18/18: by applying electromagnetic radiation, e.g. microwaves - A61B 18/14: Probes or electrodes therefor - A61B 18/1477: {Needle-like probes} - A61B 2018/00023: {closed, i.e. without wound contact by the fluid} - A61B 2018/00577: {Ablation} - A61B 2018/183: {characterised by the type of antenna} - A61B 2018/1869: {with an instrument interstitially inserted into the body, e.g. needles} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A microwave ablation antenna assembly including a coaxial cable terminating in a radiating section, a first tubular member circumscribing the coaxial cable and spaced therefrom to permit fluid flow therebetween, and a second tubular member circumscribing the first tubular member and spaced therefrom to permit fluid flow therebetween. The microwave ablation antenna assembly further includes a hub configured to receive the coaxial cable, first tubular member, and second tubular member, the hub including a fluid inflow chamber and a fluid outflow chamber and an integrated hub divider and hub cap separating the fluid inflow chamber from the fluid outflow chamber and prohibiting fluid flow between the inflow chamber and outflow chamber except via the spacing between the coaxial cable and the first tubular member and between the first tubular member and the second tubular member. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 A microwave ablation antenna assembly, comprising: a handle assembly; a coaxial cable extending through the handle assembly; a hub disposed within the handle assembly and configured to receive the coaxial cable, the hub including a fluid inflow chamber and a fluid outflow chamber; a hub divider coupled to the hub and separating the fluid inflow chamber from the fluid outflow chamber; a transition cap coupled to the hub and disposed proximal to the hub divider and the fluid inflow chamber; and an intermediate tubular member disposed within the inflow chamber between the transition cap and the hub divider. ### Claim 22 (depends on 21) The microwave ablation antenna assembly according to claim 21, further comprising a tubular member circumscribing the coaxial cable and defining a fluid channel between the tubular member and the coaxial cable, wherein the fluid channel is in fluid communication with the fluid inflow chamber. ### Claim 23 (depends on 22) The microwave ablation antenna assembly according to claim 22, wherein the intermediate tubular member includes an opening that places the fluid inflow chamber in fluid communication with the fluid channel. ### Claim 24 (depends on 22) The microwave ablation antenna assembly according to claim 22, wherein a proximal-most end of the tubular member is disposed proximal to a distal-most end of the intermediate tubular member. ### Claim 25 (depends on 22) The microwave ablation antenna assembly according to claim 22, wherein the tubular member and the coaxial cable are received through a bore formed through the hub divider. ### Claim 26 (depends on 25) The microwave ablation antenna assembly according to claim 25, wherein the tubular member is adhered to an inner surface of the bore. ### Claim 27 (depends on 21) The microwave ablation antenna assembly according to claim 21, further comprising a transition disposed within the handle assembly and configured to receive a proximal end portion of the coaxial cable such that the coaxial cable extends through the handle assembly perpendicularly relative to the transition. ### Claim 28 (depends on 27) The microwave ablation antenna assembly according to claim 27, wherein the transition cap secures the coaxial cable within the transition. ### Claim 29 (depends on 27) The microwave ablation antenna assembly according to claim 27, wherein a proximal-most end of the transition cap contacts the transition. ### Claim 30 (depends on 21) The microwave ablation antenna assembly according to claim 21, wherein the intermediate tubular member is out of physical contact with the hub. ### Claim 31 (depends on 21) The microwave ablation antenna assembly according to claim 21, wherein the hub divider includes a proximal end portion disposed proximal to a distal-most end of the intermediate tubular member. ### Claim 32 A microwave ablation antenna assembly, comprising: a handle assembly; a coaxial cable extending through the handle assembly; a hub disposed within the handle assembly and configured to receive the coaxial cable, the hub including a fluid inflow chamber and a fluid outflow chamber; a transition disposed within the handle assembly and configured to receive a proximal end portion of the coaxial cable such that the coaxial cable extends through the handle assembly perpendicularly relative to the transition; a hub divider coupled to the hub and separating the fluid inflow chamber from the fluid outflow chamber; and a transition cap coupled to the hub and configured to secure the coaxial cable within the transition, the transition cap disposed between the transition and the hub divider such that the fluid inflow chamber is defined between the transition cap and the hub divider. ### Claim 33 (depends on 32) The microwave ablation antenna assembly according to claim 32, further comprising a tubular member circumscribing the coaxial cable and defining a fluid channel between the tubular member and the coaxial cable, wherein the fluid channel is in fluid communication with the fluid inflow chamber. ### Claim 34 (depends on 33) The microwave ablation antenna assembly according to claim 33, wherein the tubular member and the coaxial cable are received through a bore formed through the hub divider. ### Claim 35 (depends on 32) The microwave ablation antenna assembly according to claim 32, wherein a proximal-most end of the transition cap contacts the transition. ### Claim 36 (depends on 32) The microwave ablation antenna assembly according to claim 32, further comprising an intermediate tubular member disposed within the inflow chamber between the transition cap and the hub divider. ### Claim 37 (depends on 36) The microwave ablation antenna assembly according to claim 36, wherein the intermediate tubular member includes an opening that places the fluid inflow chamber in fluid communication with the fluid channel. ### Claim 38 A microwave ablation antenna assembly, comprising: a handle assembly including a fluid outflow chamber and a fluid inflow chamber; a coaxial cable extending through the handle assembly; a hub divider disposed within the handle assembly to fluidly seal the fluid outflow chamber from the fluid inflow chamber; a transition cap disposed proximal to the hub divider such that the fluid inflow chamber is defined between the hub divider and the transition cap; and an intermediate tubular member disposed within the fluid inflow chamber between the transition cap and the hub divider. ### Claim 39 (depends on 38) The microwave ablation antenna assembly according to claim 38, further comprising a tubular member circumscribing the coaxial cable and defining a fluid channel between the tubular member and the coaxial cable, wherein the fluid channel is in fluid communication with the fluid inflow chamber. ### Claim 40 (depends on 39) The microwave antenna assembly according to claim 39, wherein the intermediate tubular member includes an opening that places the fluid inflow chamber in fluid communication with the fluid channel.