Medtronic, Inc.

Medtronic Cryocath LP

Lars M Mattison

Mark T Stewart

Brian T Howard

Gonzalo Martinez

Timothy G Laske

Zhongping C Yang

Mark E Henschel

Steven J Fraasch

Megan M Schmidt

Sara A Frantz

Lina T Abajebel

Kenneth C Gardeski

Noah A Deraney

Christine R Huyett

Jia Yuan Neoh

Devan D Barth

Jorge A Vergen

Clayton P Witherspoon

The present invention advantageously provides a molding device with conductive material for creating a catheter balloon with conductive elements, and methods and systems for manufacturing the catheter balloon with conductive elements. An exemplary method for coupling a plurality of conductive elements to an expandable element may include placing a first portion of a mold proximate a second portion of the mold to define a casting cavity. Conductive material may be deposited into the casting cavity. Polymeric material may be inserted into the casting cavity. The first portion of the mold may be secured to the second portion of the mold. The polymeric material may be expanded to place the polymeric material in contact with the conductive material.

Method for applying conductors to catheter based balloons

A method and pulsed field ablation (PFA) system configured to provide variable impedance paths for delivery of electric fields to patient tissue using a PFA catheter are disclosed. According to one aspect, a method includes determining a current for each of a plurality of circuit paths, each circuit path including two electrodes. Each current may be determined based at least in part on: a desired voltage between the two electrodes; a tissue impedance between the two electrodes; and a parasitic impedance associated with the circuit path. The method also includes determining at least one of an excitation voltage and an input resistance for each circuit path of the plurality of circuit paths based at least in part on the determined current for the circuit path, parasitic impedances associated with the circuit path and a tissue impedance between the two electrodes in the circuit path.

Variable impedance paths for delivery of electric fields

A medical device having an elongate body with a proximal portion, a distal portion, and defining a lumen therethrough. The medical device has an expandable element coupled to the distal portion of the elongate body, the expandable element defining a proximal portion, a distal portion opposite the proximal portion and an intermediate portion disposed between the proximal portion and the distal portion. The expandable element also has an inner surface and an outer surface opposite the inner surface. The medical device has a plurality of cutting members, each cutting member being coupled with the outer surface of the expandable element, each cutting member having a proximal end and a distal end opposite the proximal end, the proximal end being proximate the proximal portion of the expandable element and the distal end being proximate to the intermediate portion of the expandable element.

Interatrial septoplasty cutting device

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.

Safety default return path for electric field therapy

A method and system for lesion formation assessment in tissue that has undergone an ablation procedure. In one embodiment, a method of assessing lesion formation comprises: recording a baseline impedance measurement from an area of tissue with a medical device; ablating the area of tissue with the medical device; recording a post-treatment impedance measurement from the area of tissue with the medical device; identifying at least one amplitude characteristic of the baseline impedance measurement and identifying at least one amplitude characteristic of the post-treatment impedance measurement; comparing the at least one amplitude characteristic of the baseline impedance measurement and the at least one amplitude characteristic of the post-treatment impedance measurement; generating an indication of efficacy based on the comparison, the indication of efficacy being one of sufficient lesion formation and insufficient lesion formation; and re-ablating the area of tissue if the indication of efficacy is insufficient lesion formation.

Lesion assessment using peak-to-peak impedance amplitude measurement

Growing community of inventors

St. Anthony, MN, United States of America

Lars M Mattison