108 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.

A protective umbrella and intracavity umbrella ribs are coaxially arranged on a conveying guide wire of the far-end embolism protection device, a supporting bracket of the protective umbrella is of a hollow structure, two first openings are formed in the near end of the supporting bracket and are symmetrically arranged along the central axis of the supporting bracket, and a covering film is fixed to the far end of the supporting bracket and wraps a part of the far end of the supporting bracket; a plurality of holes are formed in the covering film, the intracavitary umbrella ribs are located in the supporting support and are of a hollow structure, and second openings of the intracavitary umbrella ribs face the far end of the supporting support. The intracavity umbrella ribs and the covering film form a double-layer filtering structure, so that the situation that thrombus clots are accumulated in the inner cavity of the protection umbrella is effectively improved, the probability that meshes / micropores of the protection umbrella are blocked is reduced, and sufficient blood supply of a nervous system is ensured; the intracavitary umbrella ribs and the supporting bracket are coaxially arranged, so that the stability of the protective umbrella in the blood vessel is improved, the protective umbrella is not prone to inclination, and effective capture of free thrombus is ensured; the arrangement of the two first openings ensures that an effective capture channel can be provided even in an inclined condition.

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.

A prosthetic aortic valve that uses actuating arms and grippers to attach to leaflets, reducing device migration and sizing issues. It involves excising diseased leaflets prior to implantation, ensuring blood flow to coronary arteries, and offers optical visualization. The valve features replaceable leaflets and a streamlined frame. Innovative left atrial appendage devices, embolic protection devices, intra-cardiac echocardiography devices, and steerable catheter devices are introduced. Provided herein are atraumatic, cinchable mitral valve annular repair devices, noninvasive methods that modify body calcium with electromagnetic energy, and systems for optical visualization in vascular interventions by displacing blood with clear fluid.

The invention discloses an intravascular embolism protection device which comprises a conveying guide wire, a first filter and a second filter, and the first filter is located at the near end of the second filter; the first filter and the second filter are arranged at the far end of the conveying guide wire in a spaced mode so as to be used for intercepting different tissue substances in blood vessels and allowing blood to pass through, the first filter comprises a plurality of flexible brushes, the brushes are arranged on the peripheral wall of the conveying guide wire in a radial mode, and the first filter and the second filter are arranged on the periphery of the conveying guide wire. And the second filter comprises a net-shaped filter screen. Based on the intravascular embolism protection device, the far filtering channel and the near filtering channel which are used for filtering different tissues such as thrombus are arranged, the risk of thrombus escape can be effectively reduced, the thrombus can be blocked in a long area between the first filter and the second filter, and blood flow blocking caused by the fact that the thrombus is accumulated at one position is avoided.

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.

The invention discloses an embolism protection device, and belongs to the technical field of interventional therapy instruments. The conveying assembly comprises an outer pipe movably arranged in the guide pipe in a penetrating manner and an inner pipe movably arranged in the outer pipe in a penetrating manner; the filter is connected to the conveying assembly and has a recovery state in which the filter is accommodated in the catheter and a release state in which the filter extends out of the catheter; the filter comprises a filter membrane and a filter membrane support, the far end of the filter membrane is a closed end, and the near end of the filter membrane is an open end; the filter membrane bracket comprises a bracket fixing section fixed with the outer tube and a bracket reducing section unfixed with the outer tube, and the near end of the filter membrane is connected to the bracket reducing section; the inner pipe is fixedly provided with a transmission piece connected with or abutting against the variable-diameter section of the support. When the filter is in a release state, the inner tube drives the transmission part to move, and the transmission part can drive the stent reducing section to expand outwards or retract inwards relative to the radial direction of the outer tube, so that the outer diameter is adjusted after the filter membrane stent is released, the universality of the embolism protection device is enhanced, and the embolism protection device can be suitable for blood vessels with different diameters.

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.

In some examples, an embolic protection system is provided for deploying a device in a diseased vessel of a vasculature, the embolic protection system comprising: an embolic protection device (EPD) including: an EPD shaft; a dual-hoop filter provided at a distal end of the EPD shaft, the dual-hoop filter including a distal hoop provided at a distal end of the dual-hoop filter, and a proximal hoop provided at a proximal end of the dual-hoop filter; and a filter actuator located at or towards a proximal end of the EPD, the filter actuator operable to selectively open or close the distal hoop and the proximal hoop of the dual-hoop filter.

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.

In some examples, an embolic protection system is provided for deploying a device in a diseased vessel of a vasculature, the embolic protection system comprising: an embolic protection device (EPD) including: an EPD shaft; a dual-hoop filter provided at a distal end of the EPD shaft, the dual-hoop filter including a distal hoop provided at a distal end of the dual-hoop filter, and a proximal hoop provided at a proximal end of the dual-hoop filter; and a filter actuator located at or towards a proximal end of the EPD, the filter actuator operable to selectively open or close the distal hoop and the proximal hoop of the dual-hoop filter.

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).

An embolic protection device is provided that includes a hollow rail and a filter basket attached to the hollow rail. The filter basket includes a vessel wall conforming portion, a tapered portion, and an emboli collection portion. The vessel wall conforming portion of the filter basket has an expanded diameter that is greater than a diameter of a target blood vessel. The tapered portion is attached to the vessel wall conforming portion and decreases in diameter in a downstream direction of blood flow of the target blood vessel. The emboli collection portion has an open end attached to the tapered portion and a closed end attached to the hollow rail, and the emboli collection portion has a diameter that is less than a diameter of the target blood vessel. The filter basket is configured to shunt blood flow through the tapered portion when blood flow through the emboli collection portion is obstructed.