55 results about "Catheter electrode" patented technology

The present invention relates to the technical field of medical electrophysiology catheters, and in particular to a detection system for indicating the degree of contact between catheter electrodes. The system comprises a magnetic field positioning module, a data acquisition module, and an contact detection module. The magnetic field positioning module is used to obtain the relative distance of an electrode relative to a reference point; the data acquisition module is used to obtain the impedance of the electrode relative to the reference point; and the contact detection module locates cells in the total target area based on the relative distance and impedance, and calculates the electrode contact index based on a pre-fitted relationship curve between electrode distance and impedance in the located cells. The contact degree between multiple electrodes and tissue can be obtained in real time. When the electrodes are installed on a catheter, the contact degree between each catheter electrode and tissue is displayed in real time.

This invention provides a high-voltage pulse ablation system integrating energy transmission and real-time temperature monitoring. It includes a catheter with several electrodes, each equipped with a temperature sensing unit. A temperature monitoring unit corresponds one-to-one with each temperature sensing unit, and their ends are electrically connected via a first wiring harness and a second wiring harness. The high-voltage pulse signal generated by the main unit's pulse module is transmitted to the corresponding electrode via the first or second wiring harness of the temperature monitoring unit corresponding to that electrode, and is also transmitted back to the pulse module via the first or second wiring harness of the corresponding temperature monitoring unit of any other electrode. The temperature monitoring unit synchronously couples and filters out common-mode interference generated by the high-voltage pulse signal using the first and second wiring harnesses, and performs temperature measurement based on the differential signal obtained from the temperature sensing unit via the first and second wiring harnesses. This invention significantly reduces the catheter's outer diameter and enhances its flexibility and vascular permeability.

Provided herein are systems, devices, and methods for delivering electroporation energy to treat target tissue. The system includes a generator for providing an electroporation waveform. The generator includes a signal generator for generating the electroporation waveform and a controller for providing signaling that causes the signal generator to generate the electroporation waveform. The system further includes a catheter including at least one catheter electrode. The signal generator provides the electroporation waveform to the at least one catheter electrode. The electroporation waveform includes a plurality of energy pulses, and each energy pulse is separated by an inter-pulse delay period.

The present application relates to the field of balloon catheters, and in particular to a catheter electrode assembly for a balloon catheter, a balloon catheter, and a catheter system. The catheter electrode assembly for a balloon catheter comprises a balloon body and electrode sheets disposed on the balloon body for transmitting electrical energy, wherein at least two groups of electrode sheets are disposed along the circumference of the balloon body; each group of electrode sheets comprises a proximal electrode sheet disposed on the proximal side of the balloon body and a distal electrode sheet disposed on the distal side of the balloon body; the proximal electrode sheet and the distal electrode sheet are arranged in the proximal-distal direction of the balloon body; the proximal electrode sheet forms a proximal electrode region, and the size of the proximal electrode region along the circumference of the balloon body gradually narrows from the middle of the balloon body in the proximal-distal direction to the proximal end of the balloon body; and the distal electrode sheet forms a distal electrode region, and the size of the distal electrode region along the circumference of the balloon body gradually narrows from the middle of the balloon body in the proximal-distal direction to the distal end of the balloon body. The present application mainly solves the technical problem of how to achieve better operation of a balloon catheter on target tissues in different orientations.

A power generator is disclosed for generating ablating energy deliverable to a catheter for treatment of heart rhythm disorders. The power generator includes a first output port configured to deliver ablation energy through a first conductive wire of a catheter and a second output port configured to receive a sensing signal from a thermocouple junction formed at a catheter electrode. The generator includes a first power driver for producing waveforms suitable for radiofrequency ablation (RFA) and a second power driver for generating pulsed waveforms suitable for pulsed field ablation (PFA). A switching circuit selectively couples one of the power drivers to the first output port based on a selected ablation modality. A control circuit receives an input indicating the selected modality and controls the switching circuit accordingly. The system enables dual-modality ablation using a shared catheter interface, facilitating seamless transition between RFA and PFA without requiring hardware reconfiguration.

The present invention provides an electrochemical apparatus (300a) comprising an electrolytic cell (100) for producing an electrolysis product (50, 60) and a reaction vessel (200) for consuming at least some of the electrolysis product (50, 60) as a reagent in an exothermic chemical reaction. The electrolytic cell (100) comprises an electrochemical device, itself comprising an electrode (10) and a conduit (20). The electrode (10), which is configured as an electrode (10, 70) of the electrolytic cell (100), has a first part for immersion in an electrolyte, a second part for making electrical contact with a current-carrying conductor, and a third part between the first and second parts for making thermal contact with a heat transfer fluid (HTF). The conduit (20) is arranged to bring the heat transfer fluid (HTF) into thermal contact with the third part of the electrode (10). The electrode (10) is made of carbon, which has reduced electrical resistivity and thermal conductivity at temperatures above ambient. Therefore, if the third part of the electrode (10) is heated by means of the HTF, its electrical resistivity and thermal conductivity are reduced. The former enables more efficient flow of electrical current between the first and second parts of the electrode and therefore reduces the total internal resistance of the electrolytic cell (100). The latter reduces the flow of heat between the first and second parts of the electrode (10) and therefore helps to prevent heat loss from the electrolytic cell (100) via the electrode (10) to the current-carrying conductor. Both effects make the electrolytic cell (100) more energy efficient. The apparatus (300a) further comprises a product transfer pathway (110) arranged to transfer the electrolysis product (50, 60) from the electrolytic cell (100) to the reaction vessel (200), and a first heat exchanger (210) arranged to transfer heat (Q) from the reaction vessel (200) to the heat transfer fluid (HTF) in the conduit (20). The electrochemical device may therefore be used to inject waste heat from the exothermic chemical reaction into the electrolytic cell (100). This reduces the electrical power consumption of the electrolytic cell and also makes the combination of the electrolytic cell (100) with the exothermic chemical reaction supplying the heat (Q) more energy efficient overall. The invention also provides methods of operating such an electrochemical apparatus. The invention is particularly suited to producing Group 1 and Group 2 metals by electrolysis with increased energy efficiency.

The present application relates to the field of electrophysiology catheters, and in particular to a balloon catheter, a catheter electrode assembly, and a flexible circuit board of the catheter electrode assembly. The flexible circuit board of the catheter electrode assembly comprises: an insulating substrate, the insulating substrate being used for being attached to the surface of a balloon of the balloon catheter; an electrode sheet, the electrode sheet being fixed on the insulating substrate, and the electrode sheet being used for transmitting electrical energy; a conductive trace, the conductive trace being attached to the surface of the insulating substrate, and the conductive trace being connected to the electrode sheet to achieve electrical energy transmission; and a trace insulating layer provided corresponding to the conductive trace, the trace insulating layer covering the conductive trace, and the insulating substrate having an exposed region not covered by the trace insulating layer. The present application mainly solves the technical problems that a flexible circuit board of a catheter electrode assembly is prone to separation from a balloon, and the flexible circuit board restricts the balloon from contracting to a small diameter.

The invention is entitled "Intracardiac electrogram presentation." In one embodiment, a medical system is provided that includes a catheter to be inserted into a chamber of a heart of a living subject and including catheter electrodes to contact tissue at respective locations within the chamber of the heart, a display, and processing circuitry to receive signals from the catheter and, in response to the signals: sample respective voltage values of the signals at respective timing values; and render respective intracardiac electrograms (IEGMs) representing electrical activity in the tissue sensed by the catheter electrodes at the respective locations to the display, each of the IEGM renderings including a linear array of respective shapes related to and arranged in temporal order of respective ones of the timing values, fill of the respective shapes formatted in response to respective ones of the sampled voltage values of the respective ones of the signals sampled at the respective ones of the timing values.

The invention relates to the field of electrophysiological catheters, in particular to a balloon catheter, a catheter electrode assembly and a flexible circuit board of the catheter electrode assembly. The flexible circuit board of the catheter electrode assembly comprises an insulating substrate which is used for being attached to the surface of a balloon body of a balloon catheter; the electrode plate is fixed on the insulating substrate, and the electrode plate is used for transmitting electric energy; the conductive circuit is attached to the surface of the insulating substrate, and the conductive circuit is connected with the electrode plate to realize electric energy transmission; the circuit insulating layer is arranged corresponding to the conductive circuit, the circuit insulating layer covers the conductive circuit, and the insulating substrate is provided with an exposed area which is not covered by the circuit insulating layer. The catheter electrode assembly mainly solves the technical problems that the flexible circuit board of the catheter electrode assembly is prone to being separated from the capsule body, and the flexible circuit board can limit the capsule body to form a small diameter after the capsule body shrinks.

In one embodiment, a medical system includes a catheter configured to be inserted into a chamber of a heart of a living subject, and including catheter electrodes configured to contact tissue at respective locations within the chamber of the heart, a display, and a processing circuitry configured to receive respective signals from the catheter captured by respective ones of the electrodes, assess conformity of each of the respective signals to at least one signal characteristic, find a given one of the signals of a given one of the electrodes not conforming to the at least one signal characteristic for a given time period, and render to the display an indication that the given signal of the given electrode does not conform to the at least one signal characteristic for the given time period.

The present disclosure is directed towards devices, methods, and related systems that are minutely-invasively delivered to the brain parenchyma, subdural or subarachnoid space where the devices, methods, and systems directly interface with central nervous system media (i.e., fluid or tissue) enabling detecting, sensing, measuring, stimulating, altering and / or modulating of the media or tissue surfaces.

The present invention relates to the technical field of medical electrophysiology catheters, and more particularly to a detection system for indicating the degree of contact between electrodes in a basket catheter. In the system, a magnetic field positioning module is used to obtain position information of electrodes on a basket bar; a data acquisition module is used to obtain the impedance between the electrodes themselves and adjacent electrodes on the basket bar, as well as the impedance between a reference electrode pair; and an contact detection module locates a corresponding cell in a pre-established model based on the position information, calculates a historical impedance discrimination coefficient value based on pre-stored discrimination information in the cell, calculates an impedance discrimination coefficient value for the electrode based on the impedance between the electrode itself and adjacent electrodes and the impedance between the reference electrode pair, and determines the contact index of the electrodes on the basket bar based on the number of times the impedance discrimination coefficient value is greater than or equal to the historical impedance discrimination coefficient value. The system can obtain the degree of contact between each electrode on the basket catheter and tissue in real time, facilitating control of the contact between the catheter electrode and tissue.

The invention relates to the technical field of electrophysiological catheter systems, and provides an electrophysiological catheter system and an electrophysiological catheter attaching detection method. An electrophysiology catheter system comprises an electrophysiology catheter, the electrophysiology catheter is provided with a perfusion channel and an electrode assembly, the perfusion channel is communicated with an inner cavity of the electrophysiology catheter, perfusion holes are distributed in the surface of the electrode assembly, and the perfusion holes are communicated with the inner cavity of the electrophysiology catheter; the perfusion device is connected with the perfusion channel, fluid is conveyed to the perfusion channel through the perfusion device, the fluid is discharged out of the electrode assembly through the perfusion hole, the perfusion device is provided with a perfusion detection unit, and perfusion parameters of the fluid are detected through the perfusion detection unit; the perfusion parameters are obtained through the processor, and the perfusion parameters are converted into attaching pressure signals. The contact state between the electrophysiology catheter electrode assembly and the target tissue can be conveniently detected.

The present invention provides systems, devices, and methods for delivering electroporation energy to treat target tissue. The system includes a generator for providing an electroporation waveform. The generator includes a signal generator for generating the electroporation waveform and a controller for providing signaling that causes the signal generator to generate the electroporation waveform. The system further includes a catheter including at least one catheter electrode. The signal generator provides the electroporation waveform to the at least one catheter electrode. The electroporation waveform includes multiple energy pulses, each energy pulse separated by an inter-pulse delay period.

The invention relates to the field of electrophysiological catheters, in particular to a catheter electrode assembly of an electrophysiological catheter, the electrophysiological catheter and a catheter system. The catheter electrode assembly of the electrophysiology catheter comprises a balloon body, the balloon body can be filled and contracted, and the balloon body is provided with an equatorial part with the largest diameter after being filled, a near side part located on the near end side of the equatorial part and a far side part located on the far end side of the equatorial part. The diameter of the capsule body is gradually reduced from the equator part to the capsule body near end and the capsule body far end respectively; the electrode area is exposed on the surface of the catheter electrode assembly, the electrode area is used for transmitting electric energy, and the electrode area comprises a near-end area located on the near-side part and a far-end area located on the far-side part; a partition area is arranged on the near-end area and / or the far-end area, and the partition area divides the electrode area into at least two mutually-insulated pole pieces. The invention mainly solves the technical problem of how to enable the electrophysiology catheter to be better compatible with mapping and ablation.

A power generator is disclosed for generating ablating energy deliverable to a catheter for treatment of heart rhythm disorders. The power generator includes a first output port configured to deliver ablation energy through a first conductive wire of a catheter and a second output port configured to receive a sensing signal from a thermocouple junction formed at a catheter electrode. The generator includes a first power driver for producing waveforms suitable for radiofrequency ablation (RFA) and a second power driver for generating pulsed waveforms suitable for pulsed field ablation (PF A). A switching circuit selectively couples one of the power drivers to the first output port based on a selected ablation modality. A control circuit receives an input indicating the selected modality and controls the switching circuit accordingly. The system enables dual-modality ablation using a shared catheter interface, facilitating seamless transition between RFA and PF A without requiring hardware reconfiguration.

A family of catheter electrode assemblies includes a flexible circuit having a plurality of electrical traces and a substrate; a ring electrode surrounding the flexible circuit and electrically coupled with at least one of the plurality of electrical traces; and an outer covering extending over at least a portion of the electrode. A non-contact electrode mapping catheter includes an outer tubing having a longitudinal axis, a deployment member, and a plurality of splines, at least one of the plurality of splines comprising a flexible circuit including a plurality of electrical traces and a substrate, a ring electrode surrounding the flexible circuit and electrically coupled with at least one of the plurality of electrical traces; and an outer covering extending over at least a portion of the ring electrode. A method of constructing the family of catheter electrode assemblies is also provided.

A control method for an intracardiac defibrillation catheter system is provided for performing a safer treatment by shortening the time between switching the mode to perform defibrillation and synchronization with R wave. The system includes a catheter, electrode part, power supply, input part inputting an electrocardiogram, and changeover part connected to the power supply, for switching between a first mode and second mode for electrically disconnecting and connecting the power supply and electrode part, which is connected to the power supply via the changeover part. The method includes switching the first mode to second mode with the changeover part when a cardiac potential reaches a peak of P wave and / or Q wave obtained from an electrocardiographic waveform of the electrocardiogram, and applying a voltage to the electrode part with the power supply when the cardiac potential reaches a peak of R wave obtained from the electrocardiographic waveform of the electrocardiogram.

The present disclosure provides an electrophysiology system to facilitate visualizing a proximity of at least one catheter electrode to a 3D geometry of a biological tissue. The system includes a computing device including at least one processor in communication with a memory, wherein the processor is configured to determine the proximity between the at least one catheter electrode and the biological tissue using at least one measurement. The system further includes a display device configured to display the 3D geometry of the biological tissue and a visual effect illustrating the proximity between the at least one catheter electrode and the biological tissue.

The application discloses a non-contact pressure regulating radio frequency ablation catheter, which comprises an electrode base and a catheter electrode axially slidingly installed on the electrode base, a magnet is installed at the tail end of the catheter electrode, a semi-conductive coil assembly and a driving coil electrically connected with the semi-conductive coil assembly are installed on the electrode base, the semi-conductive coil assembly with semi-conductive characteristics is placed in an external alternating electromagnetic field and uses electromagnetic induction principle to supply the driving coil with induced current with consistent direction, so that the catheter electrode is pushed by the electrode base through the repulsive force between the driving coil and the magnet, and the catheter electrode at the head of the radio frequency ablation catheter can be driven to press the lesion tissue, so that the catheter electrode can efficiently heat and ablate the deep tissue of the lesion tissue, and the pressing pressure of the catheter electrode on the lesion tissue can be regulated by regulating the magnetic field strength of the external alternating electromagnetic field, so that the radio frequency ablation can be accurately completed.

This computer system provides real-time, continuous graphical proximity feedback based on changes in electrical impedance sensed by the electrodes of a catheter. [Solution] The computer implementation method provides real-time visual feedback of intraluminal catheter engagement within a patient's luminal organ. A catheter with electrodes on its distal end assembly is positioned within the organ, a 3D model of its internal surface is generated, and it is rendered as a 3D anatomical map. For each electrode, a proximity value indicating the distance to the tissue wall is determined based on at least measured impedance and converted into a graphical attribute value. Continuous proximity visualization features are formed by ordering graphical attributes according to electrode positions representing variations in proximity. The features are projected onto the 3D anatomical map, creating an integrated graphical representation displayed on a computer display.

The present disclosure provides an electrophysiology system to facilitate visualizing a proximity of at least one catheter electrode to a 3D geometry of a biological tissue. The system includes a computing device including at least one processor in communication with a memory, wherein the processor is configured to determine the proximity between the at least one catheter electrode and the biological tissue using at least one measurement. The system further includes a display device configured to display the 3D geometry of the biological tissue and a visual effect illustrating the proximity between the at least one catheter electrode and the biological tissue.

An apparatus for manufacturing a catheter electrode-fPCB assembly includes a tray, a heat source, and a sleeve molding station. The tray is configured to (i) receive an electrode in a specified first recess in a predefined layout of recesses, where the electrode is toroidal, and (ii) receive a flexible printed circuit board (fPCB) strip in a second recess configured to enable the fPCB strip to be threaded to a predefined position of the strip via the electrode, where the fPCB strip is toroidal. A pad patterned on the fPCB strip is aligned with the electrode. The heat source is configured to apply heat for soldering the pad to the inner surface of the electrode. The sleeve molding station is configured to mold the package sleeve over the electrode-fPCB assembly while maintaining the proximal end of the strip and at least a portion of the electrode exposed.

The ablation device comprises an ablation host, an electromagnetic tracking system host and a flexible self-adaptive electrode catheter, a temperature sensor and an impedance measuring ring are integrated on the electrode surface of the flexible self-adaptive electrode catheter, and tissue conductivity changes are monitored in real time; the electromagnetic tracking system host dynamically matches the position of the head end of the flexible self-adaptive electrode catheter with a target tissue three-dimensional model, determines an ablation target spot and a safety boundary based on the target tissue three-dimensional model, verifies the contact state of the electrode and the target tissue through an impedance measurement function, and corrects the contact state in real time. After magnetic navigation accurate positioning of the electromagnetic tracking system host and flexible catheter electrode wall attachment confirmation, the ablation host starts the pre-stimulation module to temporarily stimulate a target area with a low-intensity pulsed electric field, and then the intensity and frequency of the pulsed electric field are gradually increased according to a grading strategy.

The disclosed technology includes a medical probe comprising a tubular shaft having a proximal end and a distal end, the tubular shaft extending along a longitudinal axis. The medical probe further comprises an expandable basket assembly coupled to the distal end of the tubular shaft. The basket assembly includes a plurality of electrodes with each electrode of the plurality of electrodes having a lumen therethrough. The basket assembly further includes a plurality of spines extending along the longitudinal axis and configured to bow radially outward from the longitudinal axis when the expandable basket assembly is transitioned from a collapsed form to an expanded form. Each spine includes a proximal and a distal end and a strut passing through the lumen of an electrode. The strut includes a mechanical retainer disposed on the strut to prevent the electrode from sliding proximally or distally along a length of the spine.

The utility model discloses an electrode assembly. The electrode assembly comprises a catheter, an electrode contact, a supporting piece and an anti-bending piece. Wherein the catheter is internally provided with a hollow channel extending in the axial direction of the catheter, the hollow channel comprises a supporting section and an electrode contact, the electrode contact is arranged on the outer surface of the catheter and corresponds to the supporting section, the supporting piece is arranged in the hollow channel and extends in the extending direction of the hollow channel so as to support the supporting section, and one end of the anti-bending piece is fixedly arranged. And the other end of the supporting piece is overlapped with the supporting piece in the extending direction of the hollow channel, abuts against the supporting piece and is connected with the supporting piece in a bonding mode. According to the technical scheme, the electrode contact and other structures installed on the catheter can be prevented from being damaged due to stretching and bending.

This utility model discloses an adjustable-bend intravascular shockwave catheter assembly, relating to the field of medical device technology. It includes a catheter, an electrode holder, a balloon, a forward shockwave generating electrode pair, a handle, a balloon control assembly, a shockwave control assembly, and a bend control assembly. The electrode holder and balloon are disposed at one end of the catheter. The forward shockwave generating electrode pair is disposed on the electrode holder and located inside the balloon. The handle is connected to the other end of the catheter. The balloon control assembly is connected to the balloon. The shockwave control assembly is connected to the forward shockwave generating electrode pair. The bend control assembly is connected to either the electrode holder or the forward shockwave generating electrode pair. The unique design of this utility model allows for compatibility with plaque-opening electrode pairs, enabling forward opening of occluded plaques, allowing the catheter to smoothly pass through lesions with high stenosis. Furthermore, the catheter can smoothly pass through various difficult tortuous blood vessels without the aid of a guidewire, allowing the catheter to successfully reach the lesion site and commence treatment.

The invention provides a high-voltage pulse ablation system integrating energy transmission and real-time temperature monitoring, which comprises a catheter provided with a plurality of electrodes, and temperature sensing units are arranged on the electrodes; the temperature monitoring units are in one-to-one correspondence with the temperature sensing units, and the two ends of each temperature monitoring unit and the corresponding temperature sensing unit are electrically connected through a first wire harness and a second wire harness. A high-voltage pulse signal generated by the host side pulse module is transmitted to the corresponding electrode through the first wire harness or the second wire harness of the temperature monitoring unit corresponding to the corresponding electrode, and is transmitted back to the pulse module through the first wire harness or the second wire harness of the temperature monitoring unit corresponding to any other electrode; and the temperature monitoring unit synchronously couples and filters common-mode interference generated by the high-voltage pulse signal through the first wire harness and the second wire harness, and performs temperature measurement based on differential signals acquired from the temperature sensing unit through the first wire harness and the second wire harness. The outer diameter of the catheter is obviously reduced, and the flexibility and the blood vessel passing ability of the catheter are enhanced.