32 results about "Catheter electrode" patented technology

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.

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.

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 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 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.

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.

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.

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.

A medical probe includes a shaft, a basket assembly, and heat shrink sleeves. The shaft is configured for insertion into an organ of a patient. The basket assembly is mounted at a distal end of the shaft, the basket assembly comprising a plurality of splines. The plurality of electrodes is fitted on the plurality of splines, each electrode defining an outer conductive surface. The heat shrink sleeves are fitted over the electrodes, the sleeves comprising open windows that expose conductive surfaces of the electrodes.

A system and method for measuring the impedance of one or more of a plurality of leads in an electrocardiogram (ECG) are disclosed. These may include applying a plurality of leads to a patient's body, applying a plurality impedance pads to the patient's body, providing a burst pulse from the catheter electrode of the ECG, measuring impedance signals across ones of the plurality of impedance pads and the plurality of leads, and determining the impedance for one or more leads from the measure impedance signals. The plurality of impedance pads may define a first axis from the right side of the patient's chest to the left side of the patient's chest, a second axis from the upper chest area of the patient to the lower abdomen area of the patient, and a third axis from the center of the patient's back to the center of the patient's chest.

The invention relates to the field of electrophysiological catheters, in particular to a catheter electrode assembly of a balloon catheter and the balloon catheter. The catheter electrode assembly of the balloon catheter comprises a balloon body and an electrode plate, and the electrode plate is arranged on the balloon body and used for transmitting electric energy. At least two groups of electrode plates are arranged in the circumferential direction of the capsule body, each group of electrode plates comprises near-end electrode plates arranged on the near-end side of the capsule body and far-end electrode plates arranged on the far-end side of the capsule body, and the near-end electrode plates and the far-end electrode plates are arranged in the near-far end direction of the capsule body; the near-end pole piece forms a near-end gradual change area, and the size of the near-end gradual change area in the circumferential direction of the capsule body is gradually narrowed from the middle of the capsule body in the near-far end direction to the near end of the capsule body; the far-end pole piece forms a far-end gradual change area, and the size of the far-end gradual change area in the circumferential direction of the capsule body is gradually narrowed from the middle of the capsule body in the near-far end direction to the far end of the capsule body. The invention mainly solves the technical problem of how to enable the balloon catheter to better act with target tissues in different directions.

The utility model discloses a kind of welding detection tool for ablation catheter electrode and joint, it is related to the technical field of pulse ablation catheter detection, including test box, power supply is arranged in the test box;It further includes detection circuit one and detection circuit two, the detection circuit one is used to detect the connecting sequence between electrode wire harness and electrode body;The detection circuit two is used to detect whether the circuit welded between electrode body and wire harness joint is correct.The utility model is fixed by electrode test clamp fixedly arranged in sequence, clamps multiple electrode bodies, so that the electrode body ordering of multiple permutation and combination is converted into preset fixed ordering, and the electrode wire harness connected by the conductive detection pen of setting each electrode body is detected, and the corresponding relationship of electrode wire harness and electrode body can be quickly determined by relying on the position of LED indicating lamp brightening, so as to facilitate the corresponding power connection position on wire harness joint to be connected by electrode wire harness is quickly determined, and welding production efficiency is significantly improved.

An apparatus for manufacturing catheter electrode-fPCB assemblies, the apparatus includes a tray, a heat source, and a sleeve molding station. The tray is configured to (i) receive an electrode in a designated first recess in a predefined layout of the recess, wherein the electrode is ring-shaped and (ii) receive a flexible printed circuit board (fPCB) strip in a second recess configured to enable to thread the fPCB strip via the electrode to a predefined position of the strip such that 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 an inner surface of the electrode. The sleeve molding station is configured to mold an encapsulating sleeve over the electrode-fPCB assembly, while keeping a proximal end of the strip and at least a portion of the electrode exposed.

An electroporation ablation system for treating a target tissue in a patient. The electroporation ablation system includes an ablation catheter and an electroporation generator. The ablation catheter includes a handle, a shaft having a distal end, and a catheter electrode at the distal end of the shaft and spatially arranged to generate an electric field in the target tissue in response to an electric pulse. The electroporation generator is operably coupled to the catheter electrode and configured to deliver an electric pulse in a sequence of irreversible electroporation pulses to the one or more catheter electrodes, the sequence of irreversible electroporation pulses including a pre-treatment pulse sequence and an electroporation pulse sequence. Wherein the pre-treatment pulse sequence includes pre-treatment electric pulses configured to cause electrolysis in the vicinity of the target tissue and to cause skeletal muscle stimulation tetanus in the patient.

A catheter for ablating cardiac tissue through irreversible electroporation is disclosed. The catheter includes an elongated shaft having a distal region, in which the elongated shaft defining a longitudinal axis, and a set of splines extending from the distal region of the shaft. The set of splines are configured for translation along the longitudinal axis to transition between a collapsed configuration and an expanded configuration. Each spline forms a loop in the expanded configuration. Each spline of the set of splines includes an electrode assembly having a flexible circuit within the spline. The flexible circuit includes lead traces electrically coupled to electrodes on a surface of the spline.

A medical probe includes a shaft, a basket assembly, and a heat shrinkable sleeve. The shaft is configured for insertion into an organ of a patient. The basket assembly is mounted at a distal end of the shaft, the basket assembly including a plurality of splines. A plurality of electrodes are fitted on the plurality of splines, each electrode defining an electrically conductive outer surface. A heat shrinkable sleeve is fitted on the electrode, the sleeve including an open window exposing a conductive surface of the electrode.

A method includes receiving an anatomical map of wall tissue of at least portion of a cardiac chamber. Locations are received, of electrodes of a catheter inside the cardiac chamber during application of ablation. At least some of the locations of the electrodes are projected onto surface of the map. Shortest paths are found between pairs of projected locations of adjacent electrodes. Some of the paths are indicated with first indications representing continuous ablation, when paths have path lengths that are below a given threshold path length. Others of the paths are indicated with second indications representing ablation gaps based on catheter geometry. Grid ablation tags are generated according to first and second indications and ablation model. The grid ablation tags are superimposed over anatomical map to generate ablation map and are graphically encoded according to the first and second indications. The graphically encoded ablation map is presented to users.

A computer device for analysis of electrograms comprises a data storage (114) arranged to receive electrogram signals each originating from one of a plurality of electrodes of a catheter and catheter electrode distance data, a random convolutional kernel-based feature extractor arranged to receive electrogram signals associated with the electrodes of a catheter for a given timecode and to return an electrode feature vector for each electrogram signal, and an input generator arranged to receive the electrogram feature vectors output by said random convolutional kernel-based feature extractor and catheter electrode distance data relating to the catheter from which these electrogram signals originate, to associate each electrode with at least the three closest electrodes of the catheter based on said catheter electrode distance data, and to return an input vector in which the electrode feature vectors of each electrode is grouped with the electrode feature vectors of its associated electrodes and the corresponding catheter electrode distance data, a gradient-boosted based machine learning module trained on data comprising sets of input vectors labelled with a value indicating for each electrode if its electrogram signal exhibits spatiotemporal dispersion. The computer device is arranged to receive electrogram signals associated and electrode distance date associated with a timecode, to feed them to said input generator, to use the resulting input vectors as input for said gradient-boosted based machine learning module, and to return a dispersion value for each electrode.

A catheter for ablating cardiac tissue through irreversible electroporation is disclosed. The catheter includes an elongated shaft having a distal region, in which the elongated shaft defining a longitudinal axis, and a set of splines extending from the distal region of the shaft. The set of splines are configured for translation along the longitudinal axis to transition between a collapsed configuration and an expanded configuration. Each spline forms a loop in the expanded configuration. Each spline of the set of splines includes an electrode assembly having a flexible circuit within the spline. The flexible circuit includes lead traces electrically coupled to electrodes on a surface of the spline.

In one embodiment, a catheter alignment system includes a catheter to be inserted into a body part, and including catheter electrodes to contact tissue at respective locations within the body part, a display, and processing circuitry to receive signals provided by the catheter, assess respective levels of contact of ones of the catheter electrodes with the tissue of the body part responsively to the received signals, find a direction in which the catheter should be moved to improve at least one of the respective levels of contact of at least one of the catheter electrodes responsively to the respective levels of contact of the ones of the catheter electrodes, and render to the display a representation of the catheter responsively to the received signals, and a direction indicator indicating the direction in which the catheter should be moved responsively to the found direction.

A method for processing at least one electrical signal received from a mapping catheter electrode during cardiac mapping of a patient's heart is disclosed. The method comprises processing the at least one electrical signal to identify a heartbeat in the signal at a time t; analyzing a portion of the at least one electrical signal prior to the detected heartbeat to identify a time t′ when motion of the mapping catheter electrode is at a minimum; and selecting a catheter position for the heartbeat as the position of the catheter at the time t′.