公开(公告)号：US20220313355A1

公开(公告)日：2022-10-06

申请号：US17807827

申请日：2022-06-20

Applicant: Medtronic, Inc.

Inventor： Brian T. Howard ,  Mark T. Stewart ,  Damijan Miklavcic ,  Bushan K. Purushothaman ,  Jeremy M. Stimack

IPC: A61B18/14 ,  A61B5/287 ,  A61B34/20 ,  A61B5/00

Abstract: Methods, systems, and devices for enhancing the efficiency and efficacy of energy delivery and tissue mapping. One system includes a treatment element having a plurality of electrodes and an energy generator that is configured to deliver electric energy pulses to the electrodes in a variety of patterns. For example, electrodes may be arranged in closely spaced pairs. The energy generator may deliver mapping energy to each electrode in each pair individually to map tissue and may deliver ablation energy to the electrodes in each pair together, such that each pair is treated like a single electrode, to deliver ablation energy, such as bipolar ablation energy between adjacent pairs. One system includes at least one concave electrode, the configuration of which concentrates the energy and drives it deeper into the tissue. One system includes neutral electrodes between active electrodes, the energy generator selectively coupling the neutral electrodes to alter the ablation pattern.

公开(公告)号：US11457976B2

公开(公告)日：2022-10-04

申请号：US16242081

申请日：2019-01-08

Applicant: Medtronic, Inc.

Inventor： Mark T. Stewart ,  Brian T. Howard

IPC: A61B18/14 ,  A61B5/0538 ,  A61B18/12 ,  A61B18/00 ,  A61B17/00 ,  A61B5/282

Abstract: A medical device for directionally focusing energy to a treatment site, the medical device including a shaft having an elongated body defining a proximal portion and a distal portion opposite the proximal portion, the distal portion including at least one electrode having a contact portion and a permeable sheath at least partially surrounding the at least one electrode, the permeable sheath and the at least one electrode defining an insulation cavity, the permeable sheath being impermeable to an insulation material introduced to the insulation cavity from a fluid source configured to be coupled to the shaft.

公开(公告)号：US20220133389A1

公开(公告)日：2022-05-05

申请号：US17577775

申请日：2022-01-18

Applicant: Medtronic, Inc.

Inventor： Brian T. Howard ,  Steven J. Fraasch ,  Mark T. Stewart ,  John Vandanacker

IPC: A61B18/12 ,  A61B18/14 ,  A61N1/32 ,  G06F30/20

Abstract: A method of determining a pulsed field ablation waveform parameter for creating a desired lesion characteristic in cardiac tissue. The method of provides an electrosurgical generator configured to deliver electroporation pulses, the generator configured to: load predetermined waveform parameters (yi); load predetermined modeling data (xi); accept entry of a user inputted desired lesion characteristic (ui); and determine at least one corresponding pulsed field ablation waveform parameter based on (ui), (yi); and (xi).

公开(公告)号：US20210401493A1

公开(公告)日：2021-12-30

申请号：US17357272

申请日：2021-06-24

Applicant: Medtronic, Inc.

Inventor： Brian T. Howard ,  Mark T. Stewart ,  Lars M. Mattison

IPC: A61B18/14

Abstract: A method of ablating tissue with pulse field ablation energy includes generating a single pulse of energy between a first set of one or more conducting elements of a first polarity and a second set of one or more conducting elements of a second polarity, the single pulse of energy having a first pulse width and consecutively generating pulses of energy with opposite polarity to that of the single pulse of energy, the pulses having a collective pulse width equal to the first pulse width.

公开(公告)号：US11207131B2

公开(公告)日：2021-12-28

申请号：US15651828

申请日：2017-07-17

Applicant: Medtronic, Inc.

Inventor： Brian T. Howard ,  Steven V. Ramberg

IPC: A61B18/14 ,  A61B18/00 ,  A61B18/02 ,  A61B5/352

Abstract: Devices, systems, and methods for reverse irrigation of an ablation or treatment site. In one embodiment, a reverse irrigation device comprises at least one ablation electrode and at least one reverse irrigation port, the at least one reverse irrigation port being located at at least one of immediately proximate the at least one ablation electrode and on the at least one ablation electrode, the at least one reverse irrigation port being configured to be in fluid communication with a fluid removal component. A medical system may include an ablation system and a reverse irrigation system that are configured to operate synchronously such that the reverse irrigation system is activated to remove fluid from the ablation site during a period of time during which the ablation system is activated to deliver ablation energy through the at least one ablation electrode to the ablation site.

公开(公告)号：US20210369340A1

公开(公告)日：2021-12-02

申请号：US17246766

申请日：2021-05-03

Applicant: Medtronic, Inc.

Inventor： Brian T. Howard ,  Mark T. Stewart ,  Lars M. Mattison

IPC: A61B18/14 ,  A61B18/12

Abstract: A medical device including a catheter having a proximal portion and a distal portion. A plurality of electrodes is disposed along the distal portion, the plurality of electrodes including a first electrode pair having a first fixed polarity and a second electrode pair having a second fixed polarity different than the first fixed polarity. A first lumen extends through the distal portion, the first lumen includes a first conductor configured to connect to a first electrode of the first electrode pair and a second conductor configured to connect to a second electrode of the first electrode pair. A second lumen extends through the distal portion and separated from the first lumen, the second lumen includes a third conductor configured to connect to a first electrode of the second electrode pair and a fourth conductor configured to connect to a second electrode of the second electrode pair.