40 results about "Basket catheter" patented technology

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 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.

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.

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 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.

The present invention relates to the field of electrophysiological catheters, and in particular, to a basket catheter and a basket assembly of the basket catheter. Provided are a basket assembly and a basket catheter. The basket assembly comprises a proximal connecting base, a distal connecting base, and splines. The proximal connecting base is configured to be fixedly connected to proximal ends of the splines, and the distal connecting base is configured to be fixedly connected to distal ends of the splines. During processes in which the distal connecting base moves close to and away from the proximal connecting base, the splines have a closed state and an open state. The spline comprises: a support frame having elasticity; and a flexible connecting member attached to the support frame. The flexible connecting member comprises an extending portion and a reverse folding portion. The extending portion is exposed beyond a distal end of the support frame, the reverse folding portion is connected to the extending portion and folded toward a proximal end of the basket assembly, and the reverse folding portion is fixed to the distal connecting base. The present invention primarily solves the technical problem that the basket assembly is not easily attached well to the target biological tissue.

Embodiments of the present invention include a medical probe having a flexible insertion tube, a basket assembly, and a plurality of electrodes. The basket assembly has a proximal end that is connected distally to the insertion tube and includes a plurality of resilient spines, which have respective outer sides and inner sides and are configured to bow radially outward from an axis of the basket assembly and are conjoined at the proximal end and at a distal end of the basket assembly. The plurality of electrodes are fixed to respective ones of the spines in respective longitudinal positions that are staggered on any given spine relative to the longitudinal positions of the electrodes on the spines adjacent to the given spine, and which include a conductive material that is biased towards the respective outer sides of the spines.

The application discloses a flat-head net basket automatic locking mechanism and a net basket catheter, and relates to the technical field of medical devices.The locking mechanism comprises a special-shaped tube, an embedded tube, a bolt and an elastic locking part.The embedded tube is inserted into the special-shaped tube at one end, and a gap for clamping the distal end of a nickel-titanium sheet is arranged between the other end of the special-shaped tube and the embedded tube.The embedded tube is fixedly connected to the other end of the special-shaped tube by adhesion.The elastic locking part is arranged inside the embedded tube.The bolt is used for being inserted into the embedded tube and extruding the elastic locking part.After the end of the nickel-titanium sheet of the net basket is inserted between the special-shaped tube and the embedded tube, the bolt is inserted into the embedded tube.During the insertion process, the end of the bolt slides the sliding pin shaft by extruding the inclined surface, so that the sliding pin shaft slides along the inclined groove and compresses the elastic part, thereby facilitating the sliding pin shaft to generate radial extrusion force on the bolt by the rebound force of the elastic part, facilitating the locking of the bolt, and ensuring the locking of the end of the nickel-titanium sheet.

A catheter having an end effector with multiple spines forming a basket shape is disclosed herein. The end effector can include spine loops with overlapping extensions at a distal end of the end effector. The end effector can include one or more inflatable members that are deflated during delivery and inflate to prevent the distal end of the basket assembly from contacting tissue. The end effector can include a spine hub at a distal end of the basket assembly with spine loops that extend through openings of the spine hub. The end effector can include a spiral inductor at the distal end of the basket assembly. The end effector can include an atraumatic structure over a distal end of a frame of the basket assembly.

Embodiments of the present invention include a medical probe having a flexible insertion tube, a basket assembly, and a plurality of electrodes. The basket assembly has a proximal end that is connected distally to the insertion tube and includes a plurality of resilient spines, which have respective outer sides and inner sides and are configured to bow radially outward from an axis of the basket assembly and are conjoined at the proximal end and at a distal end of the basket assembly. The plurality of electrodes are fixed to respective ones of the spines in respective longitudinal positions that are staggered on any given spine relative to the longitudinal positions of the electrodes on the spines adjacent to the given spine, and which include a conductive material that is biased towards the respective outer sides of the spines.

Disclosed in the present application are a basket skeleton, a basket balloon, a basket electrode assembly, and a basket catheter, relating to the technical field of medical devices. The basket catheter comprises a basket electrode assembly, the basket electrode assembly comprising a basket skeleton, electrode bodies and a basket balloon. The basket skeleton comprises a connection ring and bar-shaped elastic bodies, the bar-shaped elastic bodies being spaced apart in the circumferential direction of the connection ring, the distal end of each bar-shaped elastic body being bent to form a planar section, the free end of each planar section being bent to form a recess section, the recess sections being used for enclosing a recess region, and the connection ring being located inside the recess region. The basket skeleton does not cause harm to the human body and has higher safety. The basket balloon comprises a balloon having an annular structure, the balloon being divided into a first fixed section, a first deformable section, a second deformable section, a third deformable section and a second fixed section, which are different in thickness. The basket balloon has good performance in support and attachment and thus facilitates better contact between the electrode bodies and sites to be subjected to ablation via energy discharge, thereby achieving efficient discharge energy conversion.

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 application discloses a spherical bound net basket catheter and relates to the technical field of medical devices, which comprises a catheter main body, a control handle arranged at the proximal end of the catheter main body and a net basket electrode assembly arranged at the distal end of the catheter main body; further comprising an elastic metal wire, which is spirally arranged on the inner side of the net basket electrode assembly, and the control handle controls the net basket electrode assembly to be contracted into a shuttle shape or opened into a spherical shape through the elastic metal wire. The elastic metal wire is used for pulling the net basket, the net basket is tightly constrained in the storage state of the shuttle shape when the net basket is contracted, the whole net basket is conveniently put in and taken out, and the net basket is conveniently opened into a spherical shape, at the moment, the elastic metal wire is in a spiral shape, the opened net basket is maintained in a stable shape from the inner side, the uniformity is ensured, and the treatment is facilitated.