80 results about "Embolic protection" 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.

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 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.

Devices and methods are configured to allow transcarotid or subclavian access via the common carotid artery to the native aortic valve, and implantation of a prosthetic aortic valve into the heart. The devices and methods also provide means for embolic protection during such an endovascular aortic valve implantation procedure.

Embodiments of the present disclosure are directed to methods, systems and devices for embolic protection, and more specifically, to methods, systems, and devices for embolic protection for surgical systems and methods including, for example, delivery / implanting systems as well as methods for delivering or implanting prosthetic heart valves into the heart, or performing a cardiac or blood vessel procedure, where capturing or otherwise trapping emboli dislodged or created during the procedure is necessary so as to prevent complications associated therewith (e.g., strokes).

Methods, devices, and systems establish and facilitate retrograde or reverse flow blood circulation in the region of the carotid artery bifurcation in order to limit or prevent the release of emboli into the cerebral vasculature such as into the internal carotid artery. The methods are particularly useful for interventional procedures, such as stenting and angioplasty, atherectomy performed through a transcarotid approach or transfemoral into the common carotid artery, either using an open surgical technique or using a percutaneous technique, such as a modified Seldinger technique or a micropuncture technique.

Methods and apparatus for providing embolic protection during transcatheter procedures are disclosed. In one arrangement, a device includes an elongate sheath insertable through a vasculature into a target site. A filter assembly extends from the distal end of the sheath. The sheath tube can be switched between a radial contraction state and a radial expansion state. The sheath in a radially expanded state defines a central lumen allowing insertion of a device for transcatheter operations. The filter assembly includes a porous membrane switchable between a radially contracted state and a radially expanded state. The radially expanded state refers to a cross-section across the blood vessel to prevent debris from passing through the porous membrane. A filter actuation system switches the porous membrane between a radially contracted state and a radially expanded state.

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.

Devices and methods are configured to allow transcervical or subclavian access via the common carotid artery to the native aortic valve, and implantation of a prosthetic aortic valve into the heart. The devices and methods also provide means for embolic protection during such an endovascular aortic valve implantation procedure.

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

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.

Configurations are described for assisting execution of a percutaneous procedure while protecting the vascular pathway to the target treatment area. One example is directed to an embolic protection system for deploying a device to a distal location across a diseased vessel, the embolic protection system which may include an expandable introducer, an embolic protection device, and a loading sleeve.

An embolism protection system (10) includes a blood vessel access device (100), a blood vessel reinfusion device (200), a filter (300), a conduit (400), and a blood vessel closure device (600). A vascular access device (100) is configured to percutaneously access a first blood vessel (20). The vascular reinfusion device (200) is configured to access a second blood vessel (30). The filter (300) is configured to collect embolism. The conduit (400) is configured to couple the vascular access device (100), the vascular reinfusion device (200), and the filter (300). A vessel closure device (600) is configured to percutaneously close an opening in a first vessel (20). The system is configured to direct blood flow from a first blood vessel (20) through the vascular access device (100), the filter (300), and the vascular reinfusion device (200) and into a second blood vessel (30).

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).

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.

An embolic protection device with a flexible fiber-based filter element is described associated with an integrated guide structure. The integrated guide structure comprises a corewire within a hypotube having an uncut proximal section and a distal section having laser cuts through the hypotube wall. A corewire extends through the hypotube with a low friction channel, which can have a friction reducing coil between the corewire and at least a portion of the hypotube. A torque coupler restricts rotation of the corewire while allowing at least some sliding of the corewire within the hypotube that provides for actuating the filter element and for curving the laser cut hypotube. Torque coupler designs provide connection to the laser cut hypotube. The fiber bundle has an initial undeployed configuration with the fibers aligned and a deployed configuration with the fibers bent.

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.