# US 11,432,874 B2 · Medical device for use in bodily lumens, for example an atrium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,432,874 B2 - Document ID: US11432874B2 - Status: Granted - Kind: B2 - Application number: 17/584,705 - Filed: 2022-01-26 - Published: 2022-05-12 - Granted: 2022-09-06 - Earliest claimed: 2007-11-16 - Assignees: Kardium Inc. - Applicants: Kardium Inc. - Inventors: Daniel Gelbart; Douglas Wayne Goertzen; Fernando Luis de Souza Lopes - Web page: https://patentgrep.com/patent/US11432874B2 ## CPC - A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)} - A61B 5/0538: invasively, e.g. using a catheter - A61B 5/06: Devices, other than using radiation, for detecting or locating foreign bodies {; Determining position of diagnostic devices within or on the body of the patient} - A61B 5/065: {Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe} - A61B 5/068: {using impedance sensors} - A61B 5/4875: {Hydration status, fluid retention of the body} - A61B 18/18: by applying electromagnetic radiation, e.g. microwaves - A61B 18/20: using laser - A61B 2018/00214: {Expandable means emitting energy, e.g. by elements carried thereon} - A61B 2018/00351: {Heart} - A61B 2018/00577: {Ablation} - A61B 2018/00702: {Power or energy} - A61B 2018/00791: {Temperature} - A61B 2018/00863: {Fluid flow} - A61B 2018/00875: {Resistance or impedance} - A61B 2018/025: {by circulating liquid} - A61B 2090/064: {for measuring force, pressure or mechanical tension} - A61B 2090/065: {for measuring contact or contact pressure} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A device positionable in a cavity of a bodily organ (e.g., a heart) may discriminate between fluid (e.g., blood) and non-fluid tissue (e.g., wall of heart) to provide information or a mapping indicative of a position and/or orientation of the device in the cavity. Discrimination may be based on flow, or some other characteristic, for example electrical permittivity or force. The device may selectively ablate portions of the non-fluid tissue based on the information or mapping. The device may detect characteristics (e.g., electrical potentials) indicative of whether ablation was successful. The device may include a plurality of transducers, intravascularly guided in an unexpanded configuration and positioned proximate the non-fluid tissue in an expanded configuration. Expansion mechanism may include helical member(s) or inflatable member(s). ## Claims ### Claim 1 A medical system comprising: a catheter shaft; a plurality of leaf shaped structures coupled to the catheter shaft; and a plurality of ablation transducers, each leaf shaped structure including at least one ablation transducer of the plurality of ablation transducers, the plurality of leaf shaped structures circumferentially arranged about an axis of the catheter shaft, and at least two transducers of the plurality of ablation transducers comprising overlapping portions, wherein each respective leaf shaped structure of the plurality of leaf shaped structures includes at least three segments converging at a vertex, each segment of the at least three segments electrically connected to each of the other segments of the at least three segments. ### Claim 2 (depends on 1) The medical system of claim 1, comprising a meshed structure coupled to the catheter shaft and circumferentially arranged about the axis of the catheter shaft. ### Claim 3 (depends on 1) The medical system of claim 1, wherein at least one leaf shaped structure of the plurality of leaf shaped structures includes at least one notched edge. ### Claim 4 (depends on 1) The medical system of claim 1, wherein each of at least one leaf shaped structure of the plurality of leaf shaped structures includes a proximal end portion, a distal end portion, and an intermediate portion between the proximal end portion and the distal end portion, the intermediate portion tapering towards each of the proximal end portion and the distal end portion. ### Claim 5 (depends on 1) The medical system of claim 1, wherein each of at least one leaf shaped structure of the plurality of leaf shaped structures includes a leaf shaped substrate. ### Claim 6 (depends on 5) The medical system of claim 5, wherein the substrate includes a conductive layer. ### Claim 7 (depends on 5) The medical system of claim 5, wherein the substrate includes an insulative layer. ### Claim 8 (depends on 1) The medical system of claim 1, comprising a sensor located on at least one leaf shaped structure of the plurality of leaf shaped structures, the sensor configured to sense temperature. ### Claim 9 (depends on 1) The medical system of claim 1, comprising a sensor located on at least one leaf shaped structure of the plurality of leaf shaped structures, the sensor configured to sense electrical potential of tissue that forms a heart wall. ### Claim 10 (depends on 1) The medical system of claim 1, comprising a sensor located on at least one leaf shaped structure of the plurality of leaf shaped structures, the sensor configured to sense a tissue characteristic. ### Claim 11 (depends on 1) The medical system of claim 1, wherein the plurality of leaf shaped structures is moveable between a contracted configuration and an expanded configuration, the plurality of leaf shaped structures is sized to fit within a catheter sheath in the contracted configuration. ### Claim 12 (depends on 11) The medical system of claim 11, wherein the at least two transducers of the plurality of ablation transducers comprise the overlapping portions at least in the expanded configuration of the plurality of leaf shaped structures. ### Claim 13 (depends on 1) The medical system of claim 1, wherein each of at least one leaf shaped structure of the plurality of leaf shaped structures comprises a plurality of sensors respectively located on extremities of the leaf shaped structure. ### Claim 14 (depends on 1) The medical system of claim 1, wherein, for each respective leaf shaped structure of the plurality of leaf shaped structures, at least part of the at least one transducer of the respective leaf shaped structure is located at the vertex.