38 results about "Embolic protection" patented technology

A method of providing embolic protection for carotid stent implantation includes advancing an arterial sheath into an arterial system of a patient and advancing a venous sheath into a venous system of the patient. A fluid connection may be established between the venous sheath and the arterial sheath to enable retrograde flow of blood through the arterial sheath. The artery sheath may be advanced through the vasculature into the patient's carotid artery and the inflatable balloon may be inflated within the patient's carotid artery to block smooth blood flow therein. An interventional tool may be advanced through the interior lumen of the arterial sheath, the interventional tool sized such that a portion of the cross-sectional area of the interior lumen of the arterial sheath remains open for retrograde flow of blood.

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 application discloses a peripheral blood vessel intervention thrombus-removing catheter with a distal embolism protection structure and relates to the technical field of blood vessel thrombus-removing catheters.The peripheral blood vessel intervention thrombus-removing catheter with the distal embolism protection structure comprises a catheter body, one end of the catheter body is provided with a thrombus-removing assembly, the surface of the catheter body is provided with a thrombus-removing assembly, the inside of the catheter body is provided with a transmission assembly, the thrombus-removing assembly comprises a protection pipe network fixedly installed on one side of the catheter body.The transmission assembly is arranged, in the process of use, the rotation of a lead screw can drive one end of the lead screw to move the one side of the filter screen plate to the inside of the protection pipe network, so that the protection pipe network is expanded, and the air bag piece can be inflated, the catheter is placed into in the process of use, the preparation time of catheter operation is reduced, the catheter is convenient to operate, the thrombus-removing and protection operation of the catheter are improved, and the use convenience of the catheter is improved.

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.

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.

The invention provides an embolism protection device, and belongs to the technical field of intracranial interventional therapy. The device comprises a conveying guide wire, a first protective umbrella and a second protective umbrella, wherein a first cavity is formed in the conveying guide wire; the first protection umbrella is arranged at the far end of the conveying guide wire and provided with a one-way control component which is communicated with the two sides in a one-way mode. The second protective umbrella is arranged on the conveying guide wire at the near end of the first protective umbrella and is used for intercepting escaped emboli; a suction hole communicated with the first cavity is formed in the conveying guide wire between the second protective umbrella and the first protective umbrella; the suction hole sucks liquid between the first protection umbrella and the second protection umbrella, and a negative pressure area is formed between the first protection umbrella and the second protection umbrella and used for accelerating blood circulation near the device; when the second protective umbrella is contracted, the suction hole continues to work and is used for preventing emboli from escaping; the protective umbrella is mainly used for solving the technical problems that in the prior art, a protective umbrella hinders blood circulation, emboli cannot be collected actively, and the emboli are prone to escape during contraction.

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.

To provide a system, method and device for suitable embolic protection.SOLUTION: Embodiments of the present disclosure, in some embodiments, are directed to systems, methods and devices for providing embolic protection in a patient. For example, a medical device and an implantation method for implanting a medical device in a blood vessel of a subject are provided, for example comprising providing a medical device configured for arrangement in a blood vessel, the device comprising a filament, the filament being configured to include an undeployed state including a first device end (back) and a second device end (front) and at least a portion configured to fit in a lumen of a needle, and a deployed state in which the filament automatically forms helical turns in a first direction as seen from the first device end to the second device end, the helix optionally including at least one of a support portion and a filter portion.SELECTED DRAWING: Figure 1A

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.

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).

Disclosed herein are devices, systems, and methods useful in facilitating the removal of thrombus, embolus, or debris from a blood vessel and other intravascular interventional actions, including proximal embolic protection when treating a vascular lesion or condition.

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.

This application discloses an embolization protection structure, shaping tooling, and preparation method, relating to the field of interventional medical device technology. This application optimizes the embolization protection structure by connecting it with a straight third braided section between the second braided section and the filament bundle. This straight third braided section provides better support, preventing displacement of the embolization protection structure within the blood vessel during use. The embolization protection structure of this application achieves better thrombus retrieval. The evenly distributed and shaped filament bundle reduces the pushing force during surgery and the retraction force after surgery. Furthermore, the optimized embolization protection structure, with its frustum-shaped second braided section and straight third braided section, facilitates braiding and preparation. The filament bundle and retrieval holes facilitate heat setting of the embolization protection structure, reducing preparation difficulty and resulting in a more stable structure.

A method of providing embolic protection for carotid stenting includes advancing an arterial sheath into a patient's arterial system and advancing a venous sheath into the patient's venous system. A fluid connection may be established between the venous sheath and the arterial sheath that enables retrograde blood flow through the arterial sheath. The arterial sheath may be advanced through the vasculature and into the patient's carotid artery, and an inflatable balloon may be inflated within the patient's carotid artery in order to occlude antegrade blood flow therethrough. An interventional tool may be advanced through the inner lumen of the arterial sheath, the interventional tool dimensioned such that a portion of the cross-sectional area of an inner lumen of the arterial sheath remains open for retrograde blood flow.

A conformable embolic protection device comprising a filter body comprising a tubular porous mesh material having an open upstream end, an open downstream end, and an access port spaced inwardly from each of said ends, said access port comprising an expandable opening configured to conform to at least one working catheter passing therethrough, a radially collapsible support coupled to a periphery of the downstream end of the filter body, a conformable section at the upstream end of the filter body, a catheter body having a distal end coupled to the radially collapsible support, and a delivery sheath having a lumen configured to receive and radially constrain the filter body.

The present disclosure includes apparatuses and methods for an embolic protection system. In some embodiments, the system may include a delivery catheter, an embolic protection apparatus, and a retrieval catheter. In some embodiments, an embolic protection apparatus comprises a wire, an expandable loop connected to a porous filter, and a dilator at the distal end of the device.

This invention discloses an embolism protection device, belonging to the field of interventional therapy device technology. It includes: a slender support body and a filter assembly sleeved around the slender support body. The filter assembly includes a proximal filter membrane support and a filter membrane. The proximal end of the filter membrane is an open end, and the distal end is a closed end. The proximal end of the filter membrane is connected to the slender support body via the proximal filter membrane support. The open end forms an opening for thrombi to enter the filter membrane, and the closed end forms a seal to trap the thrombus. The filter membrane includes a recessed portion formed from the closed end towards the proximal end, and the recessed portion is fixedly connected to the slender support body. With this configuration, when the filter membrane intercepts thrombi, the recessed portion guides the intercepted thrombi to be more dispersed within the filter membrane around the recessed portion. Compared to the closed end of a traditional conical filter, the closed end of the filter membrane is less prone to thrombus accumulation, reducing the risk of blood flow obstruction due to excessive thrombus buildup.

The application discloses an embolism protection device and an embolism protection system. The embolism protection device comprises a delivery guide wire, a support framework, an elastic bag and a filter. The delivery guide wire has a cavity structure. The support framework has a cavity structure, and a proximal end of the support framework is connected to the delivery guide wire. The support framework is arranged to be telescopic so that a distal end of the support framework has an expansion state and a contraction state. The elastic bag is arranged at the distal end of the support framework, and the elastic bag is communicated with the cavity structure of the support framework. Filling medium entering through the cavity structure of the delivery guide wire makes the elastic bag expand and fill so as to drive the distal end of the support framework to expand. The filter is connected to the elastic bag and changes in shape with the change of the elastic bag. After the elastic bag and the filter expand, the elastic bag and the filter are attached to the inner wall of a blood vessel. Since the elastic bag has a certain elasticity, the elastic bag can not cause damage to the blood vessel under the condition that the elastic bag is well attached to the inner wall of the blood vessel.

An embolic protection device comprising a filter body comprising a tubular porous mesh material having an outer layer and an inner layer with an open upstream end, an open downstream end, a radially collapsible support coupled to a periphery of the downstream end of the filter body. There is a catheter body having a distal end coupled to the radially collapsible support, and a delivery sheath having a lumen configured to receive and radially constrain the filter body.

A catheter for carotid artery stenting includes a proximal catheter segment adapted to terminate with its distal end within a common carotid artery (CCA) and a distal catheter segment adapted to terminate within an external carotid artery (ECA). A working lumen extends distally through the proximal catheter segment. A CCA occlusion balloon is secured within the distal region of the proximal catheter segment and a ECA occlusion balloon is secured within the distal region of the distal catheter segment. A first shunt port is disposed within the proximal catheter segment proximal of the CCA occlusion balloon and a second shunt port is disposed within the distal catheter segment distal of the ECA occlusion balloon. A shunt lumen extending between the first shunt port and the second shunt port allows antegrade blood flow from proximal of the CCA occlusion balloon to distal of the ECA occlusion balloon.

An embolic protection device (100) comprises a frame (110), a side filter screen (120) and a plurality of support rods (130) arranged at intervals, the support rods (130) comprising a first end (131), a second end (131) and at least one distal head end (132), the first end (131) and the second end (131) being connected to opposite sides of the frame (110) respectively, the first end (131), the second end (131) and the head end (132) forming a first line segment (V1), a second line segment (V2) and a third line segment (V3) respectively, the first line segment (V1) extending from the first end (131) to the head end (132) and gradually away from the frame (110), the second line segment (V2) extending from the second end (131) to the head end (132) and gradually away from the frame (110), so that the plurality of support rods (130) props up the side filter screen (120) on the plurality of support rods (130) in a direction away from the frame (110). The device can fit the side filter screen to the three branches of the aortic arch without the aid of a sheath core, and in actual application, the frame and the support rods interact and promote each other, enabling the frame to be stably fixed at the aortic arch, and also enabling each support rod to give the filter screen greater upward support, thereby enabling the side filter screen to better fit the aortic arch.

Whether to deploy a cerebral embolic protection (CEP) device is determined by initially retrieving one or more image of at least part of an aorta. The image includes an aortic valve. The image is segmented to identify the aortic valve, an aortic arch, and a plurality of branching blood vessels downstream of the aortic valve. Plaque in a segment of the image at or adjacent the aortic valve is identified, and a vulnerability score associated with the plaque is generated. Dynamics of blood flow in the aortic arch and at least one of the plurality of branching blood vessels is evaluated. It is then determined whether a CEP device should be deployed at least partially based on the vulnerability score. A CEP device is selected at least partially based on the dynamics of blood flow in the aortic arch.

An embolic protection device comprises a tubular filter body attached to a sheath. The tubular filter body has an open upstream end and a generally closed downstream end for capturing emboli. A self-opening passage through the emboli capture end of the tubular filter body allows multiple catheters to be advanced from the sheath or otherwise into the filter body simultaneously or sequentially. The sheath is attached to a peripheral support structure near the emboli capture end of the filter body to facilitate deployment and retrieval of the filter body through a restraining delivery catheter.