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EP Technologies, Inc. Patents
Assignee:
EP Technologies, Inc.
Address:
Sunnyvale, CA
No. of patents:
251
Patents:


1 2 3 4 5 6










Patent Number Title Of Patent Date Issued
5868736 Systems and methods to control tissue heating or ablation with porous electrode structures February 9, 1999
Systems and methods for heating or ablating body tissue place in contact with tissue an electrode, which includes an exterior wall peripherally surrounding an interior area. A lumen conveys a medium containing ions into the interior area. At least a portion of the exterior wall of the
5865791 Atrial appendage stasis reduction procedure and devices February 2, 1999
Systems and methods reduce the effective volume of an atrial appendage by deploying first and second devices into the atrium. The first device carries a first element to affect positioning of the tissue surface in a repositioned orientation. The second device carries a second element to
5860920 Systems for locating and ablating accessory pathways in the heart January 19, 1999
Systems and methods sense electrical events about a selected annulus region of the heart to identify the location of an accessory pathway. The systems and methods establish a contact site between heart tissue along the selected annulus and a multi-electrode array having a generally circu
5855592 Systems and methods for multi-site cardiac defibrillation using multiple electrode structures January 5, 1999
Systems and methods achieve defibrillation of a heart tissue region without resort to drugs or a painful electrical shock. The systems and methods sense electrical activity in the heart tissue region and generate an organization-indicating output. The organization-indicating output varie
5855560 Catheter tip assembly January 5, 1999
An electrode tip assembly for a catheter is bendable under the control of the user. The distal tip portion of the assembly is progressively less resistant to bending than the remaining portions. The variable stiffness is provided by tapering the width or thickness of a bendable spring
5855552 Catheter having ring electrodes secured thereon January 5, 1999
A catheter having an elongated polymeric body with hollow encircling ring electrodes thereon and a method of forming the same are provided by the invention. Ring electrodes are each connected to an external electrical circuit by wires extending through the lumen, the wires each passing
5853411 Enhanced electrical connections for electrode structures December 29, 1998
Enhanced electrical connections for electrodes are provided. In one implementation, an electrode body comprises a first electrically nonconductive layer and a second electrically nonconductive layer overlying at least a portion of the first layer. An intermediate region is formed bet
5853409 Systems and apparatus for sensing temperature in body tissue December 29, 1998
An apparatus for ablating body tissue has an electrode for contacting tissue to transmit ablation energy. A tissue temperature sensing element is held in a thermally conducting carrier on the electrode. The carrier holds the tissue temperature sensing element in thermal conductive contac
5848969 Systems and methods for visualizing interior tissue regions using expandable imaging structures December 15, 1998
An imaging structure has a periphery adapted to selectively assume an expanded geometry and a collapsed geometry. The periphery of the imaging structure carries an array of spaced apart ultrasound transducers.
5846239 Tissue heating and ablation systems and methods using segmented porous electrode structures December 8, 1998
A porous electrode assembly for tissue heating and ablation systems and methods includes a wall having an exterior peripherally surrounding an interior area. The assembly includes a lumen to convey a medium containing ions into the interior area. An element couples the medium within the
5846238 Expandable-collapsible electrode structures with distal end steering or manipulation December 8, 1998
Collapsible electrode assemblies and associated methods employing a structure having an axis and a distal end. The structure comprises a wall peripherally enclosing an interior. The structure is adapted to selectively assume an expanded geometry having a first maximum diameter about
5840076 Tissue heating and ablation systems and methods using electrode structures with distally oriente November 24, 1998
Systems and methods for heating or ablating body tissue use a porous electrode structure in which the porous section of the structure occupies more of the distal region of the structure than the proximal region. In a preferred embodiment, at least 1/3rd of the proximal region of the
5836947 Flexible structures having movable splines for supporting electrode elements November 17, 1998
A flexible electrode support is bent to define an arcuate shape that extends beyond the distal end of an associated guide body. At least one of the ends of the support is free of attachment to the distal end. By moving the free end, a user can push upon or pull against the structure to a
5836874 Multi-function electrode structures for electrically analyzing and heating body tissue November 17, 1998
Systems and methods for heating body tissue place a multi-function structure having an exterior wall in contact with body tissue. The structure includes an array of electrically conducting electrode segments carried by the exterior wall. An electrically conductive network is coupled
5833621 Systems and methods for matching electrical characteristics and propagation velocities in cardia November 10, 1998
Systems and methods examine heart tissue morphology using three or more spaced apart electrodes, at least two of which are located within the heart in contact with endocardial tissue. The systems and methods transmit electrical current through a region of heart tissue lying between selec
5833604 Variable stiffness electrophysiology catheter November 10, 1998
A catheter supporting a tip electrode for percutaneous insertion into a living body having a steering mechanism that includes an elongated body bendable in response to external forces to steer the tip electrode. An axially movable stiffening member, preferably in the form of a sleeve or
5830213 Systems for heating and ablating tissue using multifunctional electrode structures November 3, 1998
Systems and methiods for heating or ablating tissue use a multifunctional electrode assembly. The electrode assembly includes a wall comprising an electrically conductive material peripherally surrounding an interior area. The wall has an interior surface facing the interior area and an
5823189 Multiple electrode support structures with spline elements and over-molded hub October 20, 1998
An electrode support structure has at least two spline leaves, each comprising an opposed pair of spline elements connected by a center web. Each web has a hole through which a pin assembly extends to join the webs of the spline leaves in a mutually stacked relationship. The spline e
5820591 Assemblies for creating compound curves in distal catheter regions October 13, 1998
Compound steering assemblies, usable in both diagnostic and therapeutic applications, enable a physician to swiftly and accurately steer the distal section of the catheter in multiple planes or complex curves to position and maintain ablation and/or mapping electrodes in intimate con
5810802 Systems and methods for controlling tissue ablation using multiple temperature sensing elements September 22, 1998
Systems and associated methods place a temperature sensing element in an "edge region" between an energy transmitting electrode and a non-electrically conducting support body, where higher temperatures are likely to exist. Reliable temperature sensing, which is sensitive to variation
5800432 Systems and methods for actively cooling ablation electrodes using diodes September 1, 1998
Systems and methods for ablating body tissue using actively cooled electrodes deploy the electrode for contacting tissue to form a tissue-electrode interface. The systems and methods conduct ablation energy to the electrode for transmission by the electrode into tissue at the tissue-
5797905 Flexible tissue ablation elements for making long lesions August 25, 1998
Devices and methods for ablating body tissue use wire wound about a support body in adjacent windings to form one or more elongated electrodes. A connection couples the wire to a source of ablation energy for transmission by the elongated electrode to ablate tissue. The adjacent wind
5797903 Tissue heating and ablation systems and methods using porous electrode structures with electrica August 25, 1998
Tissue heating and ablation systems and methods use a porous electrode assembly with an electrically conductive surface. The electrode assembly includes an exterior peripherally surrounding an interior area. At least a portion of the wall comprises an electrically conductive material. A
5797842 Steerable electrophysiology catheter August 25, 1998
A steerable catheter includes a handle, an elongated catheter body, a steering tube formed by an elongated coiled spring, the steering tube having a distal end that terminates short of the distal end of the catheter, and a steering spring having a bendable portion extending outside t
5795303 Systems and methods for making time-sequential measurements of biopotentials sensed in myocardia August 18, 1998
Analog or digital systems and methods generate a composite signal derived from a biological event in a time-sequential fashion. The systems and methods input a first set of signals derived from a biological event using a first group of sensors during a first time interval. The systems an
5782826 System and methods for detecting ancillary tissue near tissue targeted for ablation July 21, 1998
Systems and methods detect ancillary tissue within a tissue region targeted for ablation by locating a region to apply ablation energy to tissue targeted for ablation and applying energy within the region to stimulate selected ancillary tissue not targeted for ablation. The systems and
5779646 Deflectable biopsy catheter July 14, 1998
A deflectable biopsy catheter for obtaining a tissue sample from a body cavity of a patient comprising: an axially elongated catheter shaft having proximal and distal portions respectively terminating at proximal and distal ends, the catheter shaft being sized and constructed to be advan
5769847 Systems and methods for controlling tissue ablation using multiple temperature sensing elements June 23, 1998
A system and associated method ablate body tissue using multiple emitters of ablating energy. The system and method convey ablating energy individually to each emitter in a sequence of power pulses. The system and method periodically sense temperature at each emitter and compare the
5759158 Systems and methods for conducting electrophysiological testing using high-voltage energy pulses June 2, 1998
Systems and methods for diagnosing and treating cardiac disorders transmit an electrical energy pulse that temporarily stuns a zone of myocardial tissue, temporarily rendering it electrically unresponsive. The systems and methods sense an electrophysiological effect due to the transmitte
5755715 Tissue heating and ablation systems and methods using time-variable set point temperature curves May 26, 1998
Systems and methods employ an energy emitting electrode to heat tissue. The systems and methods follow a prescribed temperature set curve, in which a setpoint temperature changes over time, to control the application of energy to the electrode.
5752518 Systems and methods for visualizing interior regions of the body May 19, 1998
An imaging system for visualizing an interior body region comprises a catheter tube having a proximal end and a distal end adapted for introduction into the interior body region. The distal end carries an element that forms a three-dimensional support structure for contacting periphe
5743903 Cardiac ablation systems and methods using tissue temperature monitoring and control April 28, 1998
A cardiac ablation system and method employs an ablation electrode having an energy emitting body. A temperature sensing element senses the temperature of the tissue being ablated by the electrode. The system monitors tissue temperature using the temperature sensing element. A contro
5740808 Systems and methods for guilding diagnostic or therapeutic devices in interior tissue regions April 21, 1998
A catheter tube carries an operative element, such as, for example, an imaging element to visualize tissue. The catheter tube also carries a support structure, which surrounds the operative element. A steering element moves the operative element relative to the support structure. A g
5735846 Systems and methods for ablating body tissue using predicted maximum tissue temperature April 7, 1998
Systems and methods ablate body tissue using an electrode for contacting tissue at a tissue-electrode interface to transmit ablation energy at a determinable power level. The systems and methods include an element to remove heat from the electrode at a determinable rate. The systems and
5732698 Systems for examining the electrical characteristics of cardiac tissue while minimizing contact March 31, 1998
Systems for examining heart tissue morphology deploy one or more electrodes into the heart in contact with endocardial tissue. The systems transmit electrical current from the electrodes in paths through the contacted endocardial tissue. Based upon these current transmissions, the system
5728144 Steerable coaxial cable systems for cardiac ablation March 17, 1998
A coaxial cable assembly has an associated steering mechanism for maneuvering the assembly within the body.
5725525 Multiple electrode support structures with integral hub and spline elements March 10, 1998
An electrode support structure has spline elements radiating from a center hub in a circumferentially spaced relationship. The spline elements and hub are integrally formed from a single sheet of material.
5722975 Systems for radiofrequency ablation with phase sensitive power detection and control March 3, 1998
Systems for ablating tissue control radiofrequency power to an ablation electrode by relying upon actual phase sensitive power measurements, unaffected by phase shifts between radiofrequency voltage and current. The systems also detect these phase differences, if they develop, and in
5722416 Systems and methods for analyzing biopotential morphologies in heart tissue to locate potential March 3, 1998
Systems and methods analyze biopotential morphologies in body tissue. The systems and methods use a template of a biopotential event of known cause in body tissue. The template comprises a plot of variations in biopotentials over time and not a spacial distribution of endocardial sur
5722403 Systems and methods using a porous electrode for ablating and visualizing interior tissue region March 3, 1998
A porous electrode assembly includes a wall having a surface capable of contacting tissue. The wall peripherally surrounds an interior area. The assembly also includes a lumen to convey a medium containing ions into the interior area, as well as an electrically conductive element, which
5722402 Systems and methods for guiding movable electrode elements within multiple-electrode structures March 3, 1998
Systems and related methods guide a movable electrode within an array of multiple electrodes located within the body. The systems and methods employ the movable electrode or at least one of the multiple electrodes on the array to generate and then sense electrical or sonic energy in a
5711305 Systems and methods for acquiring endocardially or epicardially paced electrocardiograms January 27, 1998
Systems and methods acquire electrocardiograms using a first electrode associated with a region of heart tissue and a second body surface electrode. An analog or digital processing element is coupled to the first and second electrodes for conditioning the first electrode to emit a pa
5702386 Non-linear control systems and methods for heating and ablating body tissue December 30, 1997
Systems and methods employ an energy emitting electrode to heat tissue. The systems and methods control the application of energy to the electrode using adjustments that take into account, in a non-linear fashion, changes in monitored operating conditions.
5688267 Systems and methods for sensing multiple temperature conditions during tissue ablation November 18, 1997
Systems and methods for ablating body tissue use an electrode for contacting tissue to form a tissue-electrode interface. The electrode is adapted to be connected to a source of ablation energy to conduct ablation energy for transmission by the electrode into tissue at the tissue-ele
5688266 Electrode and associated systems using thermally insulated temperature sensing elements November 18, 1997
An ablation electrode carries a temperature sensing element for measuring the temperature of the tissue being ablated. A thermal insulating element associated with the sensing element blocks the transfer of heat energy from between the temperature sensing element and the body. The temper
5673695 Methods for locating and ablating accessory pathways in the heart October 7, 1997
Systems and methods sense electrical events about a selected annulus region of the heart to identify the location of an accessory pathway. The systems and methods establish a contact site between heart tissue along the selected annulus and a multi-electrode array having a generally circu
5651780 Systems for identifying catheters and monitoring their use July 29, 1997
A catheter carries a functional component, like an ablating electrode, having a predetermined operating characteristic. The catheter also electronically retains an identification code that uniquely identifies the predetermined operating characteristic. The catheter is capable of tran
5647870 Multiple electrode support structures July 15, 1997
An electrode support structure has spline elements radiating from a center hub in a circumferentially spaced relationship. The spline elements include terminal ends spaced from the hub which are joined to a base member to form a three dimensional structure for supporting electrodes.
5637090 Multiple electrode element for mapping and ablating heart tissue June 10, 1997
Systems and methods sense electrical events in heart tissue to identify the location of an arrhythmogenic focus for ablation. The systems and methods establish a contact site between heart tissue and a curvilinear electrode array. The systems and methods monitor signals representing elec
5636634 Systems using guide sheaths for introducing, deploying, and stabilizing cardiac mapping and abla June 10, 1997
A steerable first catheter directs the introduction of a guide sheath, which can otherwise be free of any onboard steering mechanism. The guide sheath, in turn, directs the introduction of the electrode-carrying second catheter, which can likewise be free of any onboard steering mechanis
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