# US 2014/0163544 A1 · Anti-seeding arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0163544 A1 - Document ID: US20140163544A1 - Status: Published application - Kind: A1 - Application number: 14/181,553 - Filed: 2014-02-14 - Published: 2014-06-12 - Earliest claimed: 2006-03-28 - Assignees: Neodynamics AB - Applicants: Neodynamics AB - Inventors: Hans Wiksell; Gert Auer; Vilhelm Ekstrand - Web page: https://patentgrep.com/patent/US20140163544A1 ## CPC - A61B 18/1477: {Needle-like probes} - A61B 10/0233: {Pointed or sharp biopsy instruments} - A61B 18/1206: {Generators therefor} - A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis - A61B 2018/00083: {low, i.e. electrically insulating} - A61B 2018/0019: {vibrating} - A61B 2018/00196: {reciprocating lengthwise} - A61B 2018/00875: {Resistance or impedance} - A61B 2018/1467: {using more than two electrodes on a single probe} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract The present invention relates to an anti-seeding arrangement (100) for invasive treatment of a human or animal body comprising an elongated hollow member (102), and a first electrode (116) of which one portion is arranged near one end of the elongated hollow member (102), said first electrode (116) being connectable to an electromagnetic field generator (110), wherein the elongated hollow member (102) is arranged to be inserted into the human or animal body, control means (106, 108) arranged to control the electromagnetic field generator (110) for delivering radio frequency bursts to the first electrode (116), and sensing means (104) to sense a physical property dependent on the insertion length of the elongated hollow member (102) in the human or animal body, and wherein the control means (106, 108) is arranged to control the operation of the electromagnetic field generator (110) in dependence of the sensed physical property. ## Claims ### Claim at position 1 1-21. (canceled) ### Claim 22 An arrangement adapted to avoid seeding infectious cells during invasive medical procedures on a human body or an animal body, the arrangement comprising: an electromagnetic field generator; an elongated hollow member having two ends and an electrode, the electrode positioned such that one portion of the electrode is at one of the two ends of the elongated hollow member, the electrode being connected to the electromagnetic field generator, the elongated hollow member being configured to be inserted into a human body or an animal body; a sensing unit configured to sense a penetration depth of the elongated hollow member in tissue; and a control unit arranged to control the electromagnetic field generator so as to deliver radio frequency (“RF”) energy bursts to the electrode and being arranged to receive the sensed penetration depth from the sensing unit and control the electromagnetic field generator in dependence on the sensed penetration depth and comprising a triggering unit arranged to trigger the electromagnetic field generator to deliver RF energy bursts in dependence on variations of the sensed penetration depth of the elongated hollow member. ### Claim 23 (depends on 22) The arrangement according to claim 22, wherein the elongated hollow member comprises a region that is electrically insulated in relation to the electrode. ### Claim 24 (depends on 23) The arrangement according to claim 23, wherein the insulated region comprises a hollow insulating sheath being longitudinally movable along the elongated hollow member over the electrode, whereby the effective length of the electrode can be varied without moving the elongated hollow member longitudinally. ### Claim 25 (depends on 23) The arrangement according to claim 23, wherein the insulating region comprises a hollow insulating sheath being longitudinally movable along the elongated hollow member over the electrode, the hollow insulating sheath having a first part arranged to be insertable in tissue surrounding the electrode, and a second part arranged to hinder further penetration of the second part into tissue, the second part comprising a flange. ### Claim 26 (depends on 22) The arrangement according to claim 22, wherein the electrode is longitudinally segmented with each segment individually controlled by the control unit wherein the control unit is arranged to control the triggering unit to trigger the electromagnetic field generator to deliver bursts of radio frequency (RF) energy to selected segments of the electrode, wherein a segment of the electrode that is positioned at an air-skin interface of the elongated hollow member can be deactivated whereby skin burn effects can be avoided. ### Claim 27 (depends on 22) The arrangement according to claim 22, wherein the elongated hollow member comprises a plurality of electrodes each of which is individually controllable by the control means wherein the control means is arranged to control the triggering unit to trigger the electromagnetic field generator to deliver bursts of radio frequency (RF) energy to selected electrodes of the plurality of electrodes of the elongated hollow member. ### Claim 28 (depends on 22) The arrangement according to claim 22, wherein the elongated hollow member is coated with a dielectric material whereby the frequency of operation of the electrode is limited to higher frequencies. ### Claim 29 (depends on 22) The arrangement according to claim 22, wherein the control means is further arranged to automatically control the triggering unit to trigger the electromagnetic field generator to deliver bursts of radio frequency (RF) energy to the electrode of the elongated hollow member when the sensing unit determines that movement of the elongated hollow member is occurring. ### Claim 30 (depends on 22) The arrangement according to claim 22 wherein a burst of energy provided by the electromagnetic field generator comprises energy having an off-duration that is several orders of magnitude larger than an on-duration of the energy. ### Claim 31 An arrangement adapted to avoid seeding infectious cells during invasive medical procedures on a human body or an animal body, the arrangement comprising: an electromagnetic field generator; an elongated hollow member having two ends and an electrode, the electrode positioned such that one portion of the electrode is at one of the two ends of the elongated hollow member, the electrode being connected to the electromagnetic field generator, the elongated hollow member being configured to be inserted into a human body or an animal body, the hollow member further comprising a hollow insulating sheath being longitudinally movable over the electrode to selectively surround the electrode thereby creating an insulating region; a sensing unit configured to sense an effective penetration depth of the elongated hollow member in tissue, the effective penetration depth being varied in dependence on the movement of the hollow insulating sheath along the elongated hollow member; and a control unit arranged to receive the sensed effective penetration depth from the sensing unit and control the electromagnetic field generator to deliver radio frequency (“RF”) energy bursts to the electrode, and being arranged to control the electromagnetic field generator in dependence on the sensed penetration depth, and comprising a triggering unit arranged to trigger the electromagnetic field generator to deliver RF energy bursts in dependence on variations of the sensed effective penetration depth of the elongated hollow member. ### Claim 32 (depends on 31) The arrangement according to claim 31, wherein the hollow insulating sheath has a first part arranged to be insertable in tissue surrounding the electrode, and a second part arranged to hinder further penetration of the second part into tissue, the second part comprising a flange. ### Claim 33 (depends on 31) The arrangement according to claim 31, wherein the electrode is longitudinally segmented with each segment individually controlled by the control unit wherein the control unit is arranged to control the triggering unit to trigger the electromagnetic field generator to deliver bursts of radio frequency (RF) energy to selected segments of the electrode, wherein a segment of the electrode that is positioned at an air-skin interface of the elongated hollow member can be deactivated whereby skin burn effects can be avoided. ### Claim 34 (depends on 31) The arrangement according to claim 31, wherein the elongated hollow member comprises a plurality of electrodes each of which is individually controllable by the control means wherein the control means is arranged to control the triggering unit to trigger the electromagnetic field generator to deliver bursts of radio frequency (RF) energy to selected electrodes of the plurality of electrodes of the elongated hollow member. ### Claim 35 (depends on 31) The arrangement according to claim 31, wherein the elongated hollow member is coated with a dielectric material whereby the frequency of operation of the electrode is limited to higher frequencies. ### Claim 36 (depends on 31) The arrangement according to claim 31, wherein the control means is further arranged to automatically control the triggering unit to trigger the electromagnetic field generator to deliver bursts of radio frequency (RF) energy to the electrode of the elongated hollow member when the sensing unit determines that movement of the elongated hollow member is occurring. ### Claim 37 (depends on 31) The arrangement according to claim 31 wherein a burst of energy provided by the electromagnetic field generator comprises energy having an off-duration that is several orders of magnitude larger than an on-duration of the energy. ### Claim 38 A method for avoiding the seeding of infectious cells during an invasive medical procedure on a human body or an animal body, the method comprising: sensing a penetration depth in tissue of an elongated hollow member having two ends and an electrode, the electrode positioned such that one portion of the electrode is at one of the two ends of the elongated hollow member, the electrode being connected to an electromagnetic field generator; and controlling the electromagnetic field generator to deliver radio frequency (“RF”) energy bursts to the electrode in dependence on the sensed penetration depth of the hollow member and triggering the electromagnetic field generator to deliver RF energy bursts in dependence on variations of the sensed penetration depth of the elongated hollow member. ### Claim 39 (depends on 38) The method according to claim 38, further comprising the step of moving longitudinally a hollow insulating sheath along the elongated hollow member over the electrode wherein the elongated hollow member comprises a region that is electrically insulated in relation to the electrode, and whereby the effective length of the electrode can be varied without moving the elongated hollow member longitudinally. ### Claim 40 (depends on 39) The method according to claim 39, further comprising the step of hindering insertion of the second part of the hollow sheath member into tissue by means of a flange associated with a second part of the hollow member. ### Claim 41 (depends on 38) The method according to claim 38, wherein the step of sensing further comprises sensing a penetration depth in tissue of an elongated hollow member having a segmented electrode; and the step of controlling further comprises triggering the electromagnetic field generator to deliver bursts of radio frequency (RF) energy to selected segments of the electrode, wherein a segment of the electrode that is positioned at an air-skin interface of the elongated hollow member can be deactivated whereby skin burn effects can be avoided. ### Claim 42 (depends on 38) The method according to claim 38, wherein the step of sensing further comprises sensing a penetration depth in tissue of an elongated hollow member having a plurality of electrodes; and the step of controlling further comprises triggering the electromagnetic field generator to deliver bursts of radio frequency (RF) energy to selected electrodes of the plurality of electrodes located in the elongated hollow member, wherein each of the electrodes is individually controllable. ### Claim 43 (depends on 38) The method according to claim 38, wherein the step of controlling further comprises automatically triggering the electromagnetic field generator to deliver bursts of radio frequency (RF) energy to the electrode of the elongated hollow member upon sensing that movement of the elongated hollow member is occurring. ### Claim 44 (depends on 38) The method according to claim 38, wherein the step of controlling further comprises controlling the electromagnetic field generator to deliver radio frequency (“RF”) energy bursts having an off-duration that is several orders of magnitude larger than an on-duration of the energy.