32 results about "Catheter ablation" patented technology

The present invention relates to a method for detecting a balloon catheter abutment pressure and a balloon catheter ablation system. The method comprises the following steps: determining, when the balloon catheter in an inflated state abuts against a tissue of interest and is thus axially compressed and / or laterally biased, an axial distance x between a proximal end and a distal end of a balloon body in the balloon catheter and / or an included angle α between an end axis of the proximal end and an end axis of the distal end of the balloon body using a proximal magnetic sensor and a distal magnetic sensor; and acquiring, according to a first corresponding relation between the known axial distance x and an axial abutment pressure of the balloon catheter and / or a second corresponding relation between the known included angle α and a lateral abutment pressure, the actual axial abutment pressure and / or the lateral abutment pressure by mapping of the axial distance x and / or the included angle α. Correspondingly, the balloon body of the balloon electrode assembly can be compressed and deformed in the axial direction and / or compressed and biased in the lateral direction of the balloon catheter. The present invention mainly solves the technical problem of detecting the abutment pressure of a balloon catheter.

To provide a novel technology related to a catheter ablation method.SOLUTION: A power supply device 8 includes: a power supply part 26 that applies a voltage to a plurality of electrodes, the power supply part 26 being electrically connected to a catheter 4 including a plurality of electrodes; and a control part 28 that controls the power supply part 26 so as to apply a voltage to some electrodes continuously multiple times and then apply a voltage to the other electrodes continuously multiple times.SELECTED DRAWING: Figure 1

The present application provides a balloon, a balloon catheter, an ablation catheter, and a tubular ultrasonic focusing apparatus and method, which relate to the field of medical devices. An expanded state of the balloon comprises a first extension section, a lens section, and a second extension section. The lens section is disposed between the first extension section and the second extension section in an axial direction. The lens section comprises a converging structure made of an energy-permeable material, wherein the converging structure is configured to converge energy from the lens section to a target converging region. The balloon catheter comprises a balloon, an energy generator, a first axial fixing member, and a second axial fixing member. The energy generator is disposed in a hollow channel of the lens section, and the energy generator has a length corresponding to the lens section in an axial direction. When the balloon catheter provided in embodiments of the present application is applied to an ablation surgery, accurate focusing on a target ablation region can be achieved based on the lens section, and damage to surrounding tissues can be minimized while precisely targeting nerves in the target ablation region, thereby improving the effect of the ablation surgery. In addition, by means of a focusing / weak focusing region formed by an acoustic beam adjustment structure, the ablation depth and precision can be adjusted, and synchronous temperature rise in the target region is achieved. The balloon catheter has the advantages of uniform and consistent ablation effect and obvious distal boundary, and can achieve the precise ablation of renal artery branches and trunks, which ensures the thoroughness of ablation, reduces damage to surrounding normal tissues to the greatest extent, meets the clinical requirements of "ablation to completion", and improves the effectiveness and safety of treatment.

To provide a novel technology related to a catheter ablation method.SOLUTION: An ablation system 1 includes: a catheter 4 including three or more electrodes; a power supply part 26 that applies a voltage to a plurality of electrodes, the power supply part 26 being electrically connected to the catheter 4; and a control part 28 that divides a plurality of electrodes 18 into a plurality of electrode groups of the number less than the number of the electrodes 18 and controls the power supply part 26 so as to successively apply a voltage to each electrode group.SELECTED DRAWING: Figure 1

An ablation device and an ablation system provided with an ablation device, include an ablation assembly and an adjustment assembly provided at the proximal end of the ablation assembly. The adjustment assembly includes an outer catheter and an inner catheter which extend axially. The ablation assembly includes a supporting framework and an ablation member provided on the supporting framework. The supporting framework includes a positioning frame and a bearing frame. The positioning frame is provided at the distal end relative to the bearing frame, the distal end of the outer catheter is connected to the proximal end of the bearing frame, the distal end of the inner catheter is connected to the distal end of the positioning frame. During moving of the inner catheter relative to the outer catheter, the supporting framework deforms, and the deformation ratio of the positioning frame is less than that of the bearing frame.

This invention relates to an ablation device, comprising a handle; a catheter with a proximal end connected to the handle and a distal end forming a flexible ablation segment suitable for insertion into a patient's body cavity through a body channel, the ablation segment having a first working section and a second working section in a working state; multiple electrodes disposed on the ablation segment; an energy generator for providing ablation energy to the electrodes; and a blocking member disposed on the ablation segment to prevent the two working sections from abutting each other, ensuring that the distance between the electrodes located on the two working sections is greater than a predetermined distance. The blocking member of the ablation device can also be used to increase the electrical clearance between adjacent electrodes. This invention, by providing a blocking member on the ablation segment, can create a certain space around the catheter, preventing adjacent first and second working sections of the catheter's ablation segment from abutting each other, maintaining the shape and structure of the ablation segment, avoiding arcing between electrodes, ensuring smooth operation, and patient safety.

The present invention is titled Systems and Methods for Temperature Control in Irrigation Ablation. A catheter ablation system includes: a catheter probe having a distal end, the catheter probe including: a temperature sensor; a plurality of irrigation holes; and an ablation electrode; a radio frequency (RF) heating controller coupled to the catheter probe and configured to supply RF energy to the ablation electrode to control the ablation electrode to emit heat at a target power; an irrigation controller coupled to the catheter probe and configured to supply irrigation fluid through the catheter probe at a continuously adjustable irrigation flow rate to exit through the irrigation holes; and an operating console having a processor and a memory, the memory storing instructions that, when executed by the processor, cause the processor to control the irrigation controller to set the irrigation flow rate based on the target power and the target average temperature.

The present invention proposes a hypertrophic obstructive cardiomyopathy ablation device, which includes an adjustable bend sheath assembly, a mapping catheter, an ablation needle assembly, and an ultrasound assembly. The mapping catheter is inserted into the adjustable bend sheath assembly and can be moved along the axial direction of the adjustable bend sheath assembly to the distal end of the adjustable bend sheath assembly to exit. The mapping catheter is used to map the heart, and the ablation needle assembly is used to chemically ablate the hypertrophic portion of the ventricular septum of the right ventricle. The ultrasound assembly can be moved to the distal end of the adjustable bend sheath assembly to exit, and the ultrasound assembly is used to monitor the position of the ablation needle assembly. The hypertrophic obstructive cardiomyopathy ablation device integrates the ultrasound assembly, the ablation needle assembly, and the mapping catheter. Under the real-time image guidance of the ultrasound assembly, the ablation needle assembly is controlled to chemically ablate the hypertrophic portion of the myocardium, ensuring the accuracy of the ablation position and the ablation depth. Under the premise of ablation safety, alcohol ablation is given to cause myocardial necrosis in the deep layer of the ventricular septum to relieve the obstruction.

The present invention provides an orthogonal electrode pulsed electric field ablation catheter. The ablation catheter is used to generate pulsed electric fields for treating arrhythmia. The ablation catheter includes a catheter body and orthogonal electrodes. The orthogonal electrodes are disposed at the free end of the catheter body. The orthogonal electrodes include multiple pairs of electrode pairs for generating pulsed electric fields acting on target cells. According to the orthogonal electrode pulsed electric field ablation catheter of the present invention, by providing multiple pairs of orthogonal electrodes at the free end of the catheter body, the energy of the emitted pulsed electric field can be adjusted to be directed along the long axis direction of myocardial cells and myocardial bundles, generating the best irreversible electroporation effect and reducing the consumption efficiency. Moreover, diverse pulsed electric fields can be provided, thereby improving the treatment effect.

The utility model discloses a controllable windmill-shaped PFA catheter, and relates to the technical field of catheter ablation and medical instruments, the controllable windmill-shaped PFA catheter comprises a catheter (1), the catheter (1) is led out from a catheter body (2), the head end of the catheter is of a windmill structure, a magnetic sensor and a plurality of electrodes are arranged on a framework of the windmill structure, and the windmill structure can be contained in a sheath tube; one end of the catheter body (2) is led out of the catheter (1), and the catheter body (2) is arranged in the sheathing canal; one end of the catheter handle (3) is led out of the catheter body (2), the catheter handle (3) is matched with a gear assembly of an electrophysiological interventional instrument, and the gear assembly at least comprises three sets of gears used for achieving corresponding operation actions. According to the windmill-shaped PFA ablation catheter, the electrodes are evenly distributed on the windmill-shaped framework, even electrode distribution is formed on the target pulmonary vein, and an operator can conduct ablation without replacing the catheter while completing three-dimensional point mapping dissection.

The present disclosure describes systems and methods for assisting a mucous membrane ablation process using machine learning. The system includes a camera device, a catheter, a memory, and a processor communicatively coupled to the memory. A camera device generates a video of a mucous membrane of an organ, and a catheter is positioned in the organ. The processor generates a map of the organ using the video from the camera device and identifies a first portion of the mucous membrane to be ablated using a neural network and the video from the camera device. The processor also uses the movement of the catheter and the map to determine that the catheter is positioned proximate the first portion of the mucous membrane, and in response to determining that the catheter is positioned proximate the first portion of the mucous membrane, ablates the first portion of the mucous membrane using the catheter.

The present invention provides a system and method for assessing and classifying one or more lesions formed within intravascular and / or intracardiac tissue to assist in the diagnosis and / or treatment of heart-related diseases. Aspects of the present invention analyze images obtained during procedures such as catheter ablation procedures, and thereby identify, evaluate, and classify one or more lesions formed within targeted tissue (i.e., intravascular and / or intracardiac tissue) in real-time or near real-time to assist in the diagnosis and / or treatment of heart-related diseases, which can be accomplished using a platform configured to do so.

The invention provides a catheter with at least one electrode pair on the head of the catheter to collect data regarding the electrical activity of the heart and analyze the data using a high-performance mapping algorithm to map the interior portions of the heart to guide catheter ablation.

A catheter ablation system includes: a catheter probe having distal end including: a temperature sensor; a plurality of irrigation holes; and an ablating electrode; a radiofrequency (RF) heating controller coupled to the catheter probe and configured to supply RF energy to the ablating electrode to control the ablating electrode to emit heat at a target power; an irrigation controller coupled to the catheter probe and configured to supply an irrigation fluid at a continuously adjustable irrigation flow rate through the catheter probe to exit through the irrigation holes; and an operating console having a processor and memory, the memory storing instructions that, when executed by the processor, cause the processor to control the irrigation controller to set the irrigation flow rate based on the target power and a target average temperature.

A system and method are provided for a navigational feedback to a catheter during an arrhythmia ablation procedure. A set of electrocardiogram (ECG) signals of a patient's arrhythmia is recorded that correspond to an unknown target location to be ablated by the catheter. During the ablation procedure, pacing locations and ECG signals corresponding to the pacing locations are collected to derive a mathematical operator that maps a 12-dimensional displacement vector in the ECG space to a 3-dimensional (3D) vector in a physical space. This 3D vector corresponds to a direction and a distance that the catheter needs to be moved in order to reach the target location of the arrhythmia.

The invention relates to a catheter ablation device for delivery of energy (such as microwave energy) via a radiating antenna to a selected region of tissue, the device having an elongated catheter with an outer sheath, configured to allow flow of fluid along the catheter to exit through one or more orifices adjacent to the antenna. The device includes an impedance monitoring system having two electrodes arranged respectively inside and outside said catheter sheath, the impedance monitoring system including an electric circuit incorporating an ionic conductivity path through said fluid. The device is introduced into a blood vessel and the invention allows monitoring of changes in the size of the blood vessel during an ablation procedure, as it can be used to measure the impedance of an electrical circuit including a blood path in the blood vessel in the region of the ablation, the measured impedance providing a measure of vascular calibre.

The present disclosure relates to a force sensor and a force sensing catheter. The force sensor includes: a sensor body; a plurality of optical sensing devices attached to the sensor main body, wherein each optical sensing device comprises a reflection member, an incident optical fiber arranged opposite to the reflection member, and a force sensing cavity defined by the reflection member and the incident optical fiber; the incident optical fiber of at least one of the plurality of optical sensing devices comprises a first incident optical fiber, a second incident optical fiber arranged opposite to the first incident optical fiber, and a temperature sensing cavity defined by the first incident optical fiber and the second incident optical fiber; the first incident optical fiber is suitable for irradiating the second incident optical fiber and collecting at least one part of light reflected from the near end of the second incident optical fiber, and is suitable for irradiating the reflecting component and collecting at least one part of light reflected from the near end of the reflecting component; the sensor main body is configured in a way that the size of the cavity length of at least one force sensing cavity is changed so as to respond to the force applied to the sensor main body.

The utility model relates to the technical field of medical apparatuses and instruments, and provides an ablation device which comprises a catheter and a catheter body. The number of the ablation needles is multiple, and the multiple ablation needles are arranged in the catheter in a sliding mode; the operation mechanism comprises an operation supporting main body and a plurality of operation pieces arranged on the operation supporting main body in a sliding mode, each ablation needle is provided with at least one operation piece, and the ablation needles are connected with the corresponding operation pieces in a one-to-one correspondence mode; the operation piece is independently pushed to slide relative to the operation supporting body so that the corresponding ablation needles can independently stretch out of the far end of the catheter or retract into the catheter, and according to the ablation device, needle inserting and needle retracting of the ablation needles are extremely convenient and fast, and needle inserting and needle retracting of the ablation needles can be independently operated; and single-pole or multi-pole independent ablation treatment can be well carried out.

The utility model relates to a renal artery sympathetic nerve ablation device, which belongs to the technical field of medical instruments and comprises a host and an ablation catheter structure, the host is communicated with the ablation catheter structure through a connecting line, the ablation catheter structure comprises a control handle, a PCB (printed circuit board) and a 6% Luer taper are arranged in the control handle, and the PCB is connected with the ablation catheter structure. The PCB is provided with a plurality of contact switches, the PCB is communicated with the host through the connecting wire, the 6% Luer taper is connected with the PI pipe, the PI pipe is arranged in the outer layer main body pipe, and a plurality of working guide pipes are further arranged in the outer layer main body pipe. The ablation device comprises a plurality of working catheters, and each working catheter can perform local ablation, so that the ablation efficiency can be improved; by adjusting the stay wire control mechanism on the handle, the bending degree of the working catheter can be controlled so as to adapt to different individuals and different sections of renal artery inner diameters, it can be guaranteed that the working catheter is well attached to a blood vessel, and the adaptability of the ablation catheter is improved.

The present application relates to a bending handle, an adjustable-bend catheter, and an ablation device. The bending handle is used to control the bending of a tube installed at its distal end. The bending handle includes a handle body, a traction unit, and a bending assembly. The traction unit includes a traction block connected to the distal end of the tube body. The traction block is movably arranged in the handle body along the axial direction to drive the distal end of the tube body to bend. The bending assembly is connected to the traction block and can rotate circumferentially relative to the handle body to drive the traction block to move axially. The present application can achieve the bending of the distal end of the tube body by controlling the rotation of the bending assembly, so that the bending state of the distal end of the tube body can be flexibly adjusted according to the individual differences in the specific anatomical structure of the human body. The surgical process no longer requires multiple positioning and ablation procedures, which simplifies the operation process during catheter ablation surgery.

An ablation catheter (10) and an ablation system comprising the ablation catheter (10). The ablation catheter (10) comprises an insertion portion (1), an ablation main body (2), a catheter main body (3), and a control handle (4) which are connected in sequence. The insertion portion (1) comprises a screw-in component (11) capable of rotating under an external force to drill into and fix within a target tissue. The ablation main body (2) comprises an ablation electrode (21), a connecting member (22), and a temperature sensor (23). The catheter main body (3) comprises a non-ablation electrode (31) and an infusion channel (32). The non-ablation electrode (31) is spaced apart from the ablation electrode (21). During ablation procedures, the non-ablation electrode (31) does not come into contact with the target tissue. The ablation catheter (10) and the ablation system screw into the hypertrophic interventricular septum to perform ablation on the interventricular septum, allowing for easier control over the screw-in speed, thereby facilitating timely stopping or depth adjustment before penetrating the myocardial wall, preventing myocardial perforation, and reducing myocardial tissue damage by means of temperature detection and perfusion functions.

To provide a novel technology related to a catheter ablation method.SOLUTION: A power supply device includes: a power supply part that applies a voltage to an electrode so as to generate a biphasic pulse BP, the power supply part being electrically connected to a catheter including an electrode; and a control part that controls the power supply part so as to generate a second pulse set P2 successively to a first pulse set P1. In the first pulse set P1, a positive voltage phase pulse PVP and a negative voltage phase pulse NVP in the biphasic pulse BP continue with a predetermined first gap A1. In the second pulse set P2, a positive voltage phase pulse PVP and a negative voltage phase pulse NVP continue with a second gap A2 different from the first gap A1.SELECTED DRAWING: Figure 3

Disclosed in the present invention is use of a doxorubicin-tetrahedral framework nucleic acid in preparing a drug for reducing electric conduction recurrence after radio frequency catheter ablation. The doxorubicin-tetrahedral framework nucleic acid is prepared from doxorubicin and a tetrahedral framework nucleic acid, and the molar ratio of the doxorubicin to the tetrahedral framework nucleic acid is (80-120):1. The doxorubicin-tetrahedral framework nucleic acid provided by the present invention enables targeted accumulation in an ablation site area after radio frequency catheter ablation, and can successfully induce the death of cells in the area, thereby effectively avoiding electric conduction recurrence caused by cell survival at an ablation site.

The application discloses a special instrument for pulse field ablation treatment of hypertrophic cardiomyopathy, and relates to the technical field of medical instruments, which comprises an instrument main body, a support detachably installed at the bottom of the instrument main body, an outer sheath control button arranged at the middle of the instrument main body, a first ablation treatment catheter treatment knob, a second ablation treatment catheter treatment knob and a catheter ablation needle control button arranged in sequence from left to right at the middle of the instrument main body, a magnetic isolation plate control button, a connecting sleeve and a sterilization sleeve arranged in sequence from right to left at the middle of the instrument main body, a connecting rod fixedly arranged between the connecting sleeve and the sterilization sleeve, and a first catheter and a second catheter arranged in the sterilization sleeve. The instrument is simple to operate, can guarantee accurate control of an ablation area and full use of ablation energy in the operation to the maximum extent, and has high safety and effectiveness.

1. Name of this design product: Dietary Instructions Card for Patients with Atrial Fibrillation After Catheter Ablation. 2. Purpose of this design: Dietary guidelines for patients with atrial fibrillation after catheter ablation; patients can choose appropriate diets based on the illustrations and text provided after the procedure. 3. The key design elements of this product are the combination of shape, pattern, and color. 4. The image or photograph that best illustrates the design's key features: the front view. 5. The design for which protection is sought includes color. 6. This product design is for a thin product, therefore the left, right, top, and bottom views are omitted.

This invention discloses a varicose vein ablation catheter, including a catheter body, a radiation component, a temperature measuring component, a connecting component, and a control unit. The radiation component is disposed on the catheter body and connected to a semi-rigid coaxial cable inside the catheter body. The temperature measuring component is disposed inside the catheter body, close to the radiation component, and measures the temperature inside and outside the radiation area of ​​the radiation component to assist in determining the length of a single ablation session. Advantages: By utilizing three spaced microwave tubes disposed on the catheter body to form three overlapping ablation radiation zones, all three radiation zones can be ablated simultaneously during a single ablation session, enhancing the length of a single ablation session and improving ablation efficiency. The ablation temperature is measured during the ablation process using temperature measuring couplers disposed within and outside the radiation zones, ensuring the ablation effect while the control unit automatically generates a temperature rise curve based on the temperature at different locations, thereby automatically calculating the length of a single ablation session.

The invention relates to the technical field of medical instruments, and discloses an asymmetric pulsed electric field ablation catheter, ablation system and ablation method.The asymmetric pulsed electric field ablation catheter comprises a first catheter body and a second catheter body, the positions of the first catheter body and / or the second catheter body are adjusted through external force, so that the first catheter body and / or the second catheter body are / is axially perpendicular to the first catheter body; the density distribution of the electric field lines between the first electrode array and the second electrode array is different, and the focus is arranged at the position of the electric field line with the required density, namely the position with the maximum electric field line density in all the electric field lines. Therefore, the linear density of the electric field, namely the intensity of the electric field, at the position of the focus can be increased only by adjusting the design of the first electrode array and the second electrode and the position relation, such as the angle, between the first electrode array and the second electrode without the adjustment of increasing the voltage, changing the pulse design and increasing the discharge frequency in the related technology; therefore, the technical effect of improving the ablation intensity and the ablation efficiency of the ablation catheter is achieved on the premise of ensuring the safety of a patient.

To provide a new technique related to catheter ablation.SOLUTION: A power supply device 8 includes a power supply part 26 which is electrically connected to a catheter 4 having a plurality of electrodes and applies a voltage to the plurality of electrodes, and a control part 28 which controls the power supply part 26 so as to apply a voltage to a part of the electrodes continuously a plurality of times and subsequently apply a voltage to the other electrodes continuously a plurality of times.SELECTED DRAWING: Figure 1

A method includes positioning an expandable balloon, coupled to a distal end of a catheter, at a target location within an organ of a patient, the expandable balloon including multiple electrodes and one or more sensors in proximity to each electrode, wherein the one or more sensors are configured each to measure a characteristic of blood. The expandable balloon is expanded at the target location. A fluid is flowed through an inner lumen of the catheter and into the blood in a vicinity of each electrode. A dependence of the characteristic of blood on time is measured, via the one or more sensors, in proximity to each electrode. Using a processor, it is determined whether or not each electrode is in physical contact with tissue, based on the measured dependence of the characteristic of blood. An indication of whether or not each electrode is in physical contact with tissue is outputted to a user.

A medical ablation catheter, an ablation system, and an ablation method. The medical ablation catheter comprises a first catheter (1), located at the distal end of the medical ablation catheter; a second catheter (2), comprising an inner catheter (21) and an outer catheter (22), the outer catheter (22) being sleeved on the outer side of the inner catheter (21) and being capable of sliding with respect to the inner catheter (21); a conductive part (3), connected to the first catheter (1) and the inner catheter (21), the distal end of the conductive part (3) being fixed within the first catheter (1), the proximal end of the conductive part (3) being fixed on the inner catheter (21); an adjustment part (4), the distal end thereof being fixed within the first catheter (1), the proximal end thereof being movably arranged within the inner catheter (21) in a penetrating manner. The conductive part (3) can be switched between a linear state and an expanded state, and ablation is performed when the conductive part (3) is in the expanded state. The medical ablation catheter can implement various ablation modes and different operational forms can be changed according to requirements, so as to improve applicability, and expandable electrodes (5, 32) are used to match areas to be ablated, so as to improve adaptability.