52 results about "Basket catheter" patented technology

The present invention discloses a ball head locking mechanism of a basket catheter and a basket catheter, and relates to the technical field of medical devices, wherein the ball head locking mechanism includes a ball head screw, a ball head screw sleeve and a restraining ring, wherein the ball head screw is threadedly connected to the inner side of the ball head screw sleeve, and the outer wall of the ball head screw sleeve is a ramp structure. The present invention screws the ball head screw and the ball head screw sleeve with threaded matching together, and relies on the restraining ring to effectively press the end of the nickel-titanium sheet of the basket structure on the ramp structure, thereby achieving effective locking and avoiding the risk of falling off caused by glue bonding. In addition, the ball head screw sleeve can also take the form of a combination of an expansion ring and an extrusion screw sleeve. When the ball head screw and the extrusion screw sleeve are relatively rotated and tightened, the ball head screw and the extrusion screw sleeve can also jointly extrude the expansion ring, so that the expansion ring expands outward, which is convenient for pressing the nickel-titanium sheet, further assisting in locking the nickel-titanium sheet, and ensuring the locking effect.

An apparatus for manufacturing an end effector for a basket catheter assembly includes a support platform and a force application mechanism. The support platform is configured to support an expandable basket formed of curved splines with shape retention. Guidelines pass through longitudinal channels of respective flexible sleeves and are connected to the free end of respective splines. The force application mechanism controllably applies and releases a tensile force on the second end of the guidelines. Pulling on a guideline applies a tensile force to the free end of the spline, thereby flattening it. This enables sliding the flattened spline through the longitudinal channel of the flexible sleeve. The spline reverts to a curved shape when the tensile force is released.

The disclosed technology includes an electrode for a medical probe having an elongated body. At least a portion of the elongated body can be electrically conductive. The elongated body can define a lumen that extends through the elongated body along a longitudinal axis of the elongated body. The electrode can include a locking stub that extends at least partially into the lumen so that the locking stub is locked to a member inserted into the lumen.

The application relates to the technical field of basket catheter, in particular to a basket catheter system and a basket catheter calibration method. The basket catheter system comprises a basket catheter, an operating handle, a tube body and a basket electrode assembly, the basket electrode assembly comprises a spline, a proximal end fixing seat and a distal end fixing seat, and the basket catheter system further comprises a proximal end position sensor and a distal end position sensor arranged on the proximal end fixing seat and the distal end fixing seat respectively; the basket catheter system further comprises a processing device, the proximal end position sensor and the distal end position sensor are connected with the basket catheter, and the processing device is used for obtaining a contact force of the basket electrode assembly and target tissue according to a proximal-distal end spacing change amount, a corresponding relationship between a known axial force value of the basket electrode assembly and the proximal-distal end spacing change amount and a contact angle of the basket electrode assembly and the target tissue. The application mainly solves the technical problem of how to detect the contact force of the basket catheter and the target tissue.

This application provides a basket catheter, which includes flexible circuit strips, an elastic support, basket electrodes, and a core rod. The flexible circuit strips are respectively arranged on the inner and outer surfaces of the elastic support, and multiple basket electrodes are disposed on the flexible circuit strips. The basket electrodes can be switched between a contracted state and an expanded state by operating the core rod. The basket electrodes on the inner surface of the elastic support are configured not to contact tissue. Accurate localization of key conduction areas through high-density sampling within the cardiac chambers allows for a clearer elucidation of the arrhythmia matrix, thereby providing better mapping and / or ablation results.

The disclosed techniques include an end effector comprising a plurality of ridges extending along a longitudinal axis to define a basket assembly, the plurality of ridges are configured to bend radially outward from the longitudinal axis to define a radius of curvature relative to the longitudinal axis and to transition between an expanded configuration and a collapsed configuration. Each ridge of the plurality of ridges may include a section extending radially outward from a radius of curvature defined by a remainder of each ridge. The end effector may also include at least one electrode disposed on a section of each of the plurality of ridges.

The present invention relates to the technical field of medical instruments. Disclosed are a ball head locking mechanism of a basket catheter and a basket catheter. The ball head locking mechanism comprises a ball head screw, a ball head thread insert and a restraining ring, wherein the ball head screw is threadedly connected to the inner side of the ball head thread insert, and the outer wall of the ball head thread insert is of a slope structure. In the present invention, the ball head screw and the ball head thread insert which are in threaded fit are screwed together, and end portions of nickel-titanium sheets of a basket structure are effectively pressed against the slope structure by means of the restraining ring, thereby achieving effective locking and avoiding the use of glue bonding to reduce the risk of detachment. In addition, the ball head thread insert can further be in the form of a combination of an expansion ring and a compression thread insert. When the ball head screw and the compression thread insert are rotated relative to each other and tightened, the ball screw and the compression thread insert can also jointly compress the expansion ring, so that the expansion ring expands outwards to press against the nickel-titanium sheets, thereby further assisting in locking the nickel-titanium sheets, and ensuring the locking effect.

A medical probe is presented including an expandable basket assembly coupled to a distal end of a tubular shaft. The basket assembly includes a cloverleaf cutout structure at its distal end and spines extending proximally from the cloverleaf structure and coupling to the tubular shaft. The cloverleaf structure includes a sinusoidal-like member extending from one spine to an adjacent spine in a direction around the longitudinal axis. Dimensions of the sinusoidal-like member can be configured to provide a lateral stiffness of the expandable basket assembly within a predetermined range and a maximum peak stress during retraction of the expandable basket assembly into an intermediate catheter such that the maximum peak stress is less than a predetermined threshold.

The disclosed technology includes an end effector comprising a plurality of spines extending along a longitudinal axis to define a basket assembly, the plurality of spines configured to bow radially outward from the longitudinal axis to define a radius of curvature with respect to the longitudinal axis and to transition between an expanded configuration and a collapsed configuration. Each spine of the plurality of spines can include a section extending radially outward from the radius of curvature defined by a remainder of each spine. The end effector can further include at least one electrode disposed on the section for each spine of the plurality of spines.

In one embodiment, a catheter apparatus is configured to be inserted into a body part of a living subject, and including an elongated deflectable element including a distal end, an expandable basket assembly disposed at the distal end and comprising a plurality of splines and a plurality of electrodes disposed on the splines, an irrigation channel disposed in the elongated deflectable element, and an inflatable balloon disposed in the expandable basket assembly and including a plurality of irrigation holes in fluid connection with the irrigation channel.

Apparatus for calibrating a catheter, the apparatus including (i) a catheter mounting device configured to fixedly mount a distal end of a shaft of the catheter, (ii) a grasper configured to couple an expandable distal-end assembly of the catheter to a gauge, the gauge configured to measure a force on the grasper by the expandable distal-end assembly in response to translation of the gauge along one or more mutually orthogonal axes, (iii) a mechanical stage configured to translate the gauge along three mutually orthogonal axes, and (iv) a processor, configured to generate calibration data for the catheter, the calibration data associating multiple translations of the mechanical stage with corresponding force measurements measured by the gauge.

Disclosed are systems and methods of removing heart valve therapy. The systems and methods may include chordae cutting devices having unique shape memory curvature, capture basket catheters with mesh baskets, and leaflet cutting tools with unique shapes that may be pulled through leaflet tissue.

A medical apparatus includes a shaft and a basket assembly. The shaft is configured for insertion into a cavity of an organ of a patient. The basket assembly is connected distally to the shaft and includes electrodes, which are configured to apply electrical energy to tissue within the cavity. The basket assembly further includes a flexible porous sheath, which is fitted over the basket assembly and is configured to contact the tissue within the cavity while simultaneously (i) preventing the electrodes from indenting the tissue and (ii) allowing electrical energy applied from the electrodes to be delivered to the tissue.

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 discloses an automatic fastening mechanism of a mesh basket catheter and the mesh basket catheter, and relates to the technical field of medical instruments.The automatic fastening mechanism of the mesh basket catheter comprises an inner and outer sleeve set and an outer thread fastening sleeve, and the inner and outer sleeve set comprises a pressing pipe and an inner thread fastening sleeve; the pressing pipe and the internal thread fastening sleeve are used for jointly clamping the end part of the nickel-titanium sheet; one end of the external thread fastening sleeve is provided with an anti-falling piece used for abutting against the inner wall of the pressing pipe. After the end of the nickel-titanium sheet is clamped and fixed between the pressing pipe and the internal thread fastening sleeve, the external thread fastening sleeve is connected into the internal thread fastening sleeve in a threaded mode, and in the process, the external thread fastening sleeve drives the anti-disengaging piece to move and abut against the end face of the internal thread fastening sleeve; and due to the extrusion effect, only the anti-falling piece is propped open and abuts against the inner wall of the pressing pipe, so that the pressing pipe is fastened relative to the internal thread fastening sleeve, it is guaranteed that the end of the nickel-titanium sheet is kept fixed, and the falling risk caused by glue bonding is avoided.

In one embodiment, a system includes a catheter including an insertion tube and a first position sensor, a pusher including a second position sensor, and an expandable assembly including flexible strips disposed circumferentially around a distal portion of the pusher, with first ends of the strips connected to the distal end of the insertion tube and second ends of the strips connected to the distal portion of the pusher, the flexible strips bowing radially outward when the pusher is retracted, processing circuitry to receive a respective position signal from the first and second position sensors, compute location and orientation coordinates for the position sensors subject to a constraint that the position sensors are coaxial and have a same orientation, compute a distance between the computed location coordinates of the position sensors, and find position coordinates of the flexible strips responsively to at least the computed distance.

A medical probe is presented including an expandable basket assembly coupled to a distal end of a tubular shaft. The basket assembly includes a cloverleaf cutout structure at its distal end and spines extending proximally from the cloverleaf structure and coupling to the tubular shaft. The cloverleaf structure includes a sinusoidal-like member extending from one spine to an adjacent spine in a direction around the longitudinal axis. Dimensions of the sinusoidal-like member can be configured to provide a lateral stiffness of the expandable basket assembly within a predetermined range and a maximum peak stress during retraction of the expandable basket assembly into an intermediate catheter such that the maximum peak stress is less than a predetermined threshold.

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 disclosed technology includes a medical probe comprising a tubular shaft extending along a longitudinal axis of the medical probe. The medical probe further comprises an expandable basket assembly coupled to the distal end of the tubular shaft. The basket assembly comprises a plurality of spines and a plurality of electrodes. The electrode comprises an electrode body that defines a lumen therethrough such that the respective spine extends through the lumen. The respective electrode body comprises two sections that define a lengthwise direction of the electrode body section that are inclined inward with respect to a central axis of the respective electrode.

A medical apparatus includes a shaft and a basket assembly. The shaft is configured for insertion into a cavity of an organ of a patient. The basket assembly is connected distally to the shaft and includes electrodes, which are configured to apply electrical energy to tissue within the cavity. The basket assembly further includes a flexible porous sheath, which is fitted over the basket assembly and is configured to contact the tissue within the cavity while simultaneously (i) preventing the electrodes from indenting the tissue and (ii) allowing electrical energy applied from the electrodes to be delivered to the tissue.

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.

In one embodiment, a system includes generator coils to generate respective magnetic fields, a catheter including a distal end, which includes magnetic coil sensors to output electrical signals based on detection of the respective magnetic fields, and processing circuitry to receive the electrical signals from the magnetic coil sensors, select at least one of magnetic fields having a magnetic field gradient as a function of at least one of the received electrical signals, compute a difference between magnetic field magnitudes of the at least one selected magnetic field detected by the first magnetic coil sensor and the second magnetic coil sensor as a function of the electrical signals, and compute a dimension of the distal end, based on the difference between the magnetic field magnitudes of the at least one selected magnetic field and the magnetic field gradient of the at least one selected magnetic field.

The invention relates to a convertible basket catheter. The present disclosure relates to a catheter having a basket-shaped electrode assembly formed from a plurality of spines with electrodes at a distal end of a catheter body. The basket electrode assembly has structural elements at a proximal end and a distal end. The structural element may maintain the spines in a desired spatial relationship with each other and / or may couple distal ends of the spines to a traction member. The basket-shaped electrode assembly has an expanded arrangement in which the spines are arcuately curved outwardly and a collapsed arrangement in which the spines are disposed generally along the longitudinal axis of the catheter body.