70 results about "Embolic Protection Devices" patented technology

Disclosed herein are clot treatment systems including mechanical thrombectomy devices and clot treatment devices, and associated devices and methods. In some embodiments, a method of removing clot material from a blood vessel of patient includes inserting a catheter to proximate the clot material within the blood vessel while radially constraining a clot treatment device and an embolic protection device within the catheter. The method can further include moving the catheter proximally to deploy the clot treatment device at least partially distal to clot material within the blood vessel, and then moving the catheter further proximally to deploy the embolic protection device at least partially proximal to the clot material. The clot treatment device can include one or more relief features configured to release captured clot material if the force on the clot treatment device exceeds a threshold.

Disclosed herein are clot treatment systems including mechanical thrombectomy devices and clot treatment devices, and associated devices and methods. In some embodiments, a method of removing clot material from a blood vessel of patient includes inserting a catheter to proximate the clot material within the blood vessel while radially constraining a clot treatment device and an embolic protection device within the catheter. The method can further include moving the catheter proximally to deploy the clot treatment device at least partially distal to clot material within the blood vessel, and then moving the catheter further proximally to deploy the embolic protection device at least partially proximal to the clot material. The clot treatment device can include one or more relief features configured to release captured clot material if the force on the clot treatment device exceeds a threshold.

Disclosed herein are clot treatment systems including mechanical thrombectomy devices and clot treatment devices, and associated devices and methods. In some embodiments, a method of removing clot material from a blood vessel of patient includes inserting a catheter to proximate the clot material within the blood vessel while radially constraining a clot treatment device and an embolic protection device within the catheter. The method can further include moving the catheter proximally to deploy the clot treatment device at least partially distal to clot material within the blood vessel, and then moving the catheter further proximally to deploy the embolic protection device at least partially proximal to the clot material. The clot treatment device can include one or more relief features configured to release captured clot material if the force on the clot treatment device exceeds a threshold.

The invention discloses an embolism protection device and an embolism protection system. The embolism protection device comprises a conveying guide wire with a cavity structure; the supporting framework is provided with a cavity structure, the near end of the supporting framework is connected to the conveying guide wire, and the supporting framework is arranged to be telescopic so that the far end of the supporting framework can have an expansion state and a contraction state; the elastic bag is arranged at the far end of the supporting framework, the elastic bag is communicated with the cavity structure of the supporting framework, the filling medium entering through the cavity structure of the conveying guide wire enables the elastic bag to be filled and expanded, and therefore the far end of the supporting framework is driven to be expanded; and the filtering piece is connected to the elastic bag and changes in shape along with the change of the elastic bag. The filtering piece is attached to the inner wall of the blood vessel after being expanded, and due to the fact that the elastic bag has certain elasticity, the blood vessel cannot be damaged under the condition that the elastic bag is well attached to the inner wall of the blood vessel.

A catheter device is disclosed comprising; an elongate sheath (503) with a lumen and a distal end for positioning at a heart valve (6), an embolic protection device (200) for temporarily positioning in the aortic arch for deflection of embolic debris from the ascending aorta to the descending aorta, said embolic protection device is connectable to a transluminal delivery unit (130) extending proximally from a connection point (131), and having: a frame with a periphery, a blood permeable unit within said periphery for preventing embolic particles from passing therethrough with a blood flow downstream an aortic valve into side vessels of said aortic arch to the brain of a patient, and at least one tissue apposition sustaining unit (300, 350) extending from said catheter, into said aortic arch, and being attached to said embolic protection device at a sustaining point (502), for application of a stabilization force offset to said connection point at said embolic protection device, such as at said periphery, and for providing said stabilization force towards an inner wall of said aortic arch, away from said heart, and in a direction perpendicular to a longitudinal extension of said periphery, when said catheter device is positioned in said aortic arch, such that tissue apposition of said periphery to an inner wall of said aortic arch is supported by said force for improving stability and peripheral sealing. In addition related methods are disclosed.

A system for transvascular delivery to an aortic arch of a patient includes an embolic protection device, a connector mechanism, and a catheter or sheath for delivering the embolic protection device to a working zone. The embolic protection device includes a support frame having a distal portion and a proximal portion, and a filter member attached to the support frame and configured for preventing embolic materials from passing there through. At least one of the distal portion and the proximal portion includes a spring section configured for providing a radial force between the support frame and a wall of the aortic arch when in an expanded state. The embolic protection device is pivotable axially but not radially relative to the connector mechanism.

The invention belongs to the technical field of medical instruments, and particularly relates to an embolism protection device. The embolism protection device comprises an embolism protection net, and the embolism protection net sequentially comprises an initial section, a middle section and a final section in the direction from the far end to the near end; the main body of the embolism protection net is composed of a plurality of cells; the initial section is provided with a first cell; the middle section and / or the final section are / is provided with a second cell, the second cell is provided with an extension rod, one end of the extension rod is connected with the cell at the near end of the extension rod, and the other end of the extension rod is slidably assembled with the cell at the far end of the extension rod; and the extension rods are used for adjusting the mesh size of at least part of the cells. The embolism protection device is helpful to be placed at a farther-end position through the blocking section, and is also helpful to reduce the occurrence of missed capture of fine particles.

An embolic protection system for delivering, deploying, and retrieving a filter configured to capture particles that may become dislodged during a medical procedure. The embolic protection system may include an embolic protection device that captures the particles, a delivery catheter assembly for delivering the embolic protection device to a target location within the vasculature, and a retrieval catheter assembly for retrieving the embolic protection device, along with the captured particles, from the target location after use. The embolic protection device includes a filter movably connected to a guidewire, such that after deployment, the filter can move both axially and rotationally relative to the guidewire, thereby reducing the risk of vasospasm or vascular dissection.

An embolic protection device is disclosed for placement through the descending aorta and over the aortic arch to inhibit emboli release into the aortic side branch vessels while allowing simultaneous access to the aortic valve by at least one interventional and / or diagnostic catheter being introduced from the descending aorta. The filter body comprises a tubular porous mesh material and has an open upstream end to allow entry of blood flow and emboli and an open downstream end to allow entry of multiple catheters. The filter body includes at least one catheter access path parallel to said at least one passage through the filter body, and the filter body has one or more support structures or wires that provide longitudinal stiffness to the device to prevent compression or movement of the filter during a procedure.

The invention discloses an embolism protection device, and belongs to the technical field of interventional therapy instruments. The filter is arranged on the periphery of the long and thin supporting main body in a sleeving manner and has an unfolded structure which is outwards unfolded relative to the radial direction of the long and thin supporting main body; the far end of the filter is a closed end, and the near end of the filter is an open end; when the filter is in the unfolded configuration, an opening for thrombus to enter the filter is formed in the open end, and a seal for holding the thrombus is formed in the closed end; the tying rope is tied to the open end of the filter, and at least one end of the tying rope extends to the operation end; the tether is used for driving the open end to gather so as to reduce the size of the opening. The tying rope is tied at the open end of the filter, when the filter and thrombus in the filter need to be withdrawn from the body, the tying rope is pulled to the near end through the operation end, the tying rope drives the open end to gather together, and the opening of the open end is shrunk or completely closed, so that the thrombus is wrapped in the filter; and the thrombus escape risk in the process of withdrawing the embolism protection device is reduced.

The present disclosure provides an embolic protection device comprising a metal wire or metal ribbon with an elliptical or flat cross-section, pre-formed into a spiral structure wound around its short axis. The formed embolic protection device can be deployed within a tubular object and introduced into the target blood vessel through the tube. The elasticity of the material enables it to revert to a predetermined shape, thereby effectively intercepting emboli. The device is characterized by a smaller curvature, enhanced recovery to the preset shape, and reduced interference with blood flow.

Embolic protection device (1) inside a blood vessel (10) comprising a filament preformed as a double conical spiral structure with a first peripheral zone (2) formed by a floppy (3) followed by a first set of coils (4) in the form of a cone; a central zone (5) formed by at least one central coil and a second peripheral zone (6), following the central zone (5), formed by a second set of coils (7) and a terminal means (8) located at the end of the second set of coils (7), wherein the second set of coils (7) is movable from an open position to a closed position, forming a cone of ascending diameter in the direction of blood flow inthe openposition , and a cone of descending diameter in the direction of blood flow through the central zone (5) in the closed position.

This invention discloses a magnetic embolism protection device and system, belonging to the field of medical device technology. It includes a catheter and an umbrella-shaped filter assembly disposed on the distal outer wall of the catheter. A permanent magnet is disposed within the catheter to cooperate in opening and closing the filter assembly. The catheter has a first cavity, a second cavity, and a guidewire cavity along its length. The first cavity is located near the inner wall of the catheter, while the second and guidewire cavities are located side-by-side within the catheter. The distal ends of the first and second cavities are interconnected through a connecting hole. The permanent magnet is placed in the middle of the first cavity, and a first hole is located at the proximal end of the catheter, communicating with the first cavity. By pressurizing the first cavity, the permanent magnet is displaced, further causing the unfolding and opening rods to expand and contract magnetically. The size of the umbrella opening can be controlled to adapt to blood vessels of different inner diameters. It is highly adaptable, structurally stable, and easy to control, effectively intercepting free thrombi, reducing the probability of thromboembolism, and improving the success rate of surgery.

An embolic protection device includes a frame, an edge filter screen, and a plurality of supporting rods that are arranged at intervals. Each supporting rod includes a first tail end, a second tail end, and at least one head end that faces a distal end. The first tail end and the second tail end are separately connected to two opposite sides of the frame. The first tail end and the second tail end separately form a first line segment and a second line segment with the head end. The first line segment extends in a direction from the first tail end to the head end and gradually moves away from the frame, and the second line segment extends in a direction from the second tail end to the head end and gradually moves away from the frame.

An intravascular catheter device and methods for using the same are provided. An expandable portion is provided at a distal end of a flexible catheter tube and includes struts operable between a first position and a second position where the struts are moved outward from the first position. An incising member is provided at, and extends along a lengthwise dimension of, and outward from, at least one of the struts. An embolic protection device is provided which is configured for movement between a first position and a second position where the embolic protection device is enlarged relative to said first position.

Disclosed herein are clot treatment systems including mechanical thrombectomy devices and clot treatment devices, and associated devices and methods. In some embodiments, a method of removing clot material from a blood vessel of a patient includes inserting a catheter to proximate the clot material within the blood vessel while radially constraining a clot treatment device and an embolic protection device within the catheter. The clot treatment device can include a balloon catheter including an inflation port positioned on a proximal end of the balloon catheter and fluidly connected to a balloon on a distal end thereof. The balloon catheter includes an inflation control device fluidly connected to the inflation port, wherein the inflation control device is configured to reduce pressure within the balloon during inflation of the balloon.

The invention discloses machining equipment and a machining method of an embolism protection device, the embolism protection device comprises a supporting frame and a filter screen connected to the supporting frame, the machining equipment comprises a mold, a first mold body and a second mold body, the first mold body and the second mold body are movably matched, and the mold is used for clamping the supporting frame and the filter screen; the shaping assembly movably goes in and out of the hollow area and is used for abutting against the filter screen for shaping, and the shaping assembly comprises a crown part provided with a shaping surface corresponding to the filter screen in structure; the driving mechanism is in transmission fit with one side, back on to the shaping surface, of the crown part; the energy supply assembly comprises a coil which heats the supporting frame through electromagnetic induction, and the distance between the coil and the supporting frame is adjustable. Based on heating of the supporting frame, shaping of the filter screen and combination of the filter screen and the supporting frame are integrated from inside to outside, the production efficiency and the product percent of pass are improved, and the operation requirement is lowered.

The present invention includes an embolic protection device comprising: a catheter having a self-expanding embolic filter disposed about the vicinity of a distal portion of the catheter, where the embolic filter comprises a frame and the frame defines an opening of the embolic filter, the opening facing a distal end of the catheter; a deployment mechanism disposed about at least a portion of the catheter, where the deployment mechanism is longitudinally movable relative to the catheter, the deployment mechanism configured to contain an embolic filter in a folded configuration, and the embolic filter configured to self-expand upon longitudinal retraction of the deployment mechanism; and a wire coupled to the frame to expand the size or diameter of the embolic filter opening.

To provide a catheter with a suitable integrated embolic protection device. [Solution] The artificial heart valve delivery catheter includes an embolic filter to provide integrated embolic protection to prevent the release of embolus into the aorta, aortic arch, or branch vessels and other vascular systems during transvascular heart valve replacement procedures. The embolic filter will typically be fixed or movably attached to the shaft of the delivery catheter proximal to the artificial heart valve.

This invention provides a graded embolization protection device, belonging to the field of vascular interventional medical device technology. The device includes a delivery guidewire, with multiple protection units fixedly arranged at intervals at the distal end of the guidewire. Each protection unit has a proximal open end and a distal closed end, and each protection unit has a flexible support frame for support at a target location. Multiple open areas are formed on the support frame, and a soft, elastic filter membrane is arranged on the edge of each open area or on the sidewall of the entire support frame to cover the open area. In use, the multiple protection units are axially deployed graded along the target location, with the flexible support frame of each protection unit fully conforming to the inner wall of the blood vessel, and the soft, elastic filter membrane intercepting emboli in the blood flow. This addresses at least the technical problems of existing embolization protection devices, such as poor flexibility due to the high coverage of the rigid support structure, difficulty in adapting to complex vascular morphologies, and poor fit with the vascular wall, leading to embolism escape.

The present invention includes an embolic protection device comprising a catheter having a self-expanding embolic filter that is disposed around the catheter proximal to a distal portion, wherein the embolic filter comprises a frame, and the frame defines an opening of the embolic filter that faces the distal end of the catheter; a deployment mechanism that is disposed around at least a portion of the catheter, wherein the deployment mechanism is longitudinally movable with respect to the catheter, the deployment mechanism is configured to contain the embolic filter in a collapsed configuration, and the embolic filter is configured to self-expand upon the longitudinal retraction of the deployment mechanism; and a wire coupled to the frame for expanding the size or diameter of the embolic filter opening.

A distal embolization protection device, which is used for preventing distal vascular embolization. The distal embolization protection device comprises: a filter screen (2), the body of the filter screen (2) consisting of hollow tubes (21), which are distributed in cross and inner cavities of which are in communication with each other, and the filter screen (2) being configured to filter out thrombi; and a pushing rod (3), which has a cavity section (31), wherein the cavity section (31) has a fluid conveying channel (311), the fluid conveying channel (311) being in communication with the inner cavities of the hollow tubes (21) and being configured to convey a fluid to the inner cavities of the hollow tubes (21), so that the filter screen (2) is converted from a folded state into an unfolded state under the pressure of the fluid. In the distal embolization protection device, the filter screen can be opened by means of filling the hollow tubes with a fluid, and can fit onto a vascular lumen by means of controlling the magnitude of a fluid filling pressure, thereby helping to improve the plaque capturing efficiency and lowering the plaque escape risk.

An embolic protection device (1) for insertion into the aortic arch, comprising a filter unit (3), a frame (5) and a feeding unit (7), wherein the filter unit (3) is arranged at the frame (5) and the frame (5) provides a proximal region (9) comprising a proximal body (11) arranged in an inner region of the frame (5) and connected to the feeding unit (7), wherein the proximal body (11) comprises a first portion (13) and a second portion (15), wherein the second portion (15) is formed at one end of the first portion (13).

A reverse flow system for performing vasculature procedures may include a catheter and a flow control system. The catheter may extend from a proximal end to a distal end that is adapted to terminate within a common carotid artery (CCA) and include an occlusion balloon, an inflation lumen in communication with the occlusion balloon, and a working lumen terminating at the distal end of the catheter. The flow control device may be in communication with the working lumen and configured to control a flow rate of fluid through the working lumen and to confirm a full reverse flow of fluid in an internal carotid artery in communication with the CCA and an external carotid artery in communication with the CCA based on a measure related to an amount of force required for the flow control device to achieve the flow rate of fluid through the working lumen.

The invention provides an intracranial embolism protection device, and belongs to the technical field of embolism protection devices. The device comprises an embolus filter screen, the far end of the expanded embolus filter screen is closed, the near end of the expanded embolus filter screen is provided with an open collecting opening used for collecting free embolus in a blood vessel, the far end of the embolus filter screen is fixedly connected with a filter screen rod body, and the near end of the embolus filter screen is movably connected with a guide wire. The embolus filter screen is used for preventing the embolus filter screen from shaking in a blood vessel along with the movement of a guide wire to damage the blood vessel, the embolus filter screen is formed by cutting a metal piece through laser, the sizes of meshes in the embolus filter screen are approximately uniform, and the metal piece is in a conical shape with a small far end and a large near end; the technical problems that according to an intracranial embolism protection device in the prior art, due to the fact that a filter screen is formed by weaving, flexibility is insufficient after contraction, the size is large after compression, the filter screen and a sheathing canal are not prone to being disassembled and assembled, and the blood flow speed is easily hindered due to large mesh difference are solved. In addition, the technical problem that vasospasm is easily caused by fixed connection of the filter screen and the guide wire is solved.

The utility model relates to the field of medical instruments, and discloses an embolism protection device which comprises a guide wire, a balloon assembly, a filter membrane and an outer tube, the balloon assembly is arranged on the guide wire in a sleeving mode and provided with a blood flow channel, the far end of the balloon assembly is fixedly connected with the guide wire, a plurality of filter holes are formed in the filter membrane, and the filter membrane is provided with an opening end and a tail end; the filter membrane wraps the outer surface of the balloon assembly, the open end wraps the near end of the balloon assembly, the tail end of the filter membrane wraps the far end, the guide wire is sleeved with the outer tube, the outer tube is located on one side of the near end, a charging and discharging channel is formed between the outer tube and the guide wire, and the near end is communicated with the charging and discharging channel. The filter membrane is arranged on the outer surface of the balloon assembly, the balloon assembly is filled and collided to support the filter membrane, the filter membrane is tightly attached to the inner wall of the blood vessel, thrombus is prevented from escaping from the gap between the filter membrane and the inner wall of the blood vessel, the filter holes are formed in the filter membrane, the thrombus in blood is filtered through the filter membrane, and the thrombus is prevented from escaping.

Embolic protection device for insertion into an aortic arch, with a filter unit, a frame and a feed unit, wherein the filter unit is arranged at the frame and the frame provides a proximal area having a proximal shape, which is arranged in an inner area of the frame and is connected to the feed unit, wherein the proximal shape has a first part and a second part, wherein the second part is formed at one end of the first part.

Disclosed herein are clot treatment systems including an integrated / systematic mechanical thrombectomy device and a clot treatment device, and associated devices and methods. In some embodiments, a method of removing clot material from a blood vessel of a patient includes inserting a catheter within the blood vessel proximate the clot material while radially constraining a clot handling device and an embolic protection device within the catheter. The method may also include moving the catheter proximally to at least partially deploy the clot treatment device to a distal side of the clot material within the blood vessel, and then further moving the catheter proximally to at least partially deploy the embolic protection device to a proximal side of the clot material.

The invention discloses machining equipment and a machining method.The embolism protection device comprises a supporting frame and a filter screen connected to the supporting frame, the machining equipment comprises a mold and an energy supply assembly, and the mold comprises a first mold body and a second mold body which are movably matched; the first mold and the second mold are used for clamping the supporting frame and the filter screen, and at least one of the first mold and the second mold is provided with a hollow area for exposing the middle of the filter screen; the energy supply assembly is used for heating the supporting frame clamped by the mold. The shaping of the filter screen and the combination of the filter screen and the supporting frame are integrated, the amplitude of wrapping the annular frame by the filter screen can be adjusted according to the pressure and the change of the elastic piece, the production efficiency is improved, and the operation difficulty is reduced.