277 results about "Intravascular device" patented technology

The present disclosure is directed to intravascular devices, systems, and methods having a core member coupled to a shaping ribbon with an adhesive. In some aspects, a sensing guide wire is provided. The sensing guide wire can include a flexible elongate member; and a sensing element coupled to a distal portion of the flexible elongate member, wherein the distal portion of the flexible elongate member includes: a core member; and a shaping ribbon fixedly secured to the core member by an adhesive and at least one connecting sleeve. In other aspects, methods of forming a sensing guide wire are provided.

An intravascular device includes a tube member. The tube member comprises a distal portion and a proximal portion. Each of the distal portion and the proximal portion of the tube member comprises a plurality of cuts circumferentially extending around a longitudinal axis of the tube member. The plurality of cuts of the distal portion of the tube member comprises a first pitch, a first cut length, and a first uncut length, the plurality of cuts of the proximal portion of the tube member comprises a second pitch, a second cut length, and a second uncut length, and the first pitch is less than the second pitch, the first cut length is greater than the second length, and the first uncut length is less than the second uncut length.

An intravascular device can comprise a carrier and an expansion apparatus. The device can be used for intravascular treatment of atherosclerotic plaque. The carrier can be reversibly expandable and collapsible within a vessel and can have ribbon strips extending between opposite ends in a longitudinal direction of the carrier. The ribbon strips can each be formed with a plurality of elongated protrusions thereon. The expansion apparatus can be used to actuate the ribbon strips each with the plurality elongated protrusions to pierce a luminal surface of the plaque with lines or patterns of microperforations which act as serrations for forming cleavage lines or planes in the plaque.

An intravascular device can comprise a carrier and an expansion apparatus. The device can be used for intravascular treatment of atherosclerotic plaque. The carrier can be reversibly expandable and collapsible within a vessel and can have ribbon strips extending between opposite ends in a longitudinal direction of the carrier. The ribbon strips can each be formed with a plurality of elongated protrusions thereon. The expansion apparatus can be used to actuate the ribbon strips each with the plurality elongated protrusions to pierce a luminal surface of the plaque with lines or patterns of microperforations which act as serrations for forming cleavage lines or planes in the plaque.

An endovascular device, including an elongated flexible sheath defining a lumen with an inner opening sized for enabling selective advancement of an endovascular instrument therethrough, the sheath having at least a first region and a second region; an electrode within the first region of the sheath; and a constrictor associated with the first region of the sheath, the constrictor being configured, while at least the first region and the second region of the sheath are positioned within a body and in response to an input received from outside the body, to reversibly narrow the lumen of the sheath in an area adjacent the electrode to thereby bring the electrode into contact with an adjacent portion of the endovascular instrument.

An orientable intravascular device having a “twelve o'clock” marker on a proximal and distal end for treating an aneurysm, including a packaging catheter with an identical fixed non-round shaped inner lumen, a pusher wire having an occlusion device releasably disposed on the distal end of said pusher wire, preloaded at a fixed circumferential orientation, with corresponding markers on the outside of said packaging catheter, a hub having an inner lumen that is shaped to marry with the outer lumen of the packaging catheter to deliver a delivery wire and occlusion stent in a predicted orientation, and maintaining such orientation as the wire and stent are advanced through said delivery catheter, and while said delivery catheter is withdrawn. Methods of using same are disclosed.

Polymer catheters and guidewires for use in intravascular surgery, and more particularly polymer catheters and guidewires micro-machined with a micro-cutting machine to provide sufficient flexibility to travel through a patient's vasculature while retaining sufficient torquability to transmit torque from a proximal end to the distal end of the catheter or guidewire, and methods of producing the same.

The invention relates to an endovascular device (1) having a stent structure (2), which is present in an expanded state, in which the stent structure is at least temporarily released in a blood vessel, and a compressed state, in which the stent structure is inserted into the blood vessel in a microcatheter, the stent structure (2) having a substantially cylindrical main part (3), wherein the stent structure (2) has at least one connection point (6) to a guidewire (5), and the guidewire (5) extends distally beyond the stent structure (2), and wherein the guidewire extends along a periphery of the stent structure (2). According to an alternative embodiment, the stent structure (2) is connected to a tube (12) through which a guidewire (5) extends distally beyond the stent structure (2). The device (1) according to the invention allows the guide wire (5) and the stent structure (2) to be inserted into the blood vessel together with the microcatheter without the need to exchange midway between the guide wire (5), the microcatheter and the stent structure (2).

This disclosure relates to a catheter system that for precisely positioning fluid flow restrictors within a blood vessel. In particular, this disclosure provides a catheter system that includes a sheath with a first fluid flow restrictor mounted thereto, and a catheter that is slidably disposed within the sheath and has a second fluid flow restrictor mounted thereto. Inside a blood vessel, the sheath and the catheter are separately slidable, thereby allowing the first and second fluid flow restrictors to be positioned at precise locations within the blood vessel.

An intravascular device with an improved attachment of its elements is provided. The intravascular device comprises a vascular pusher comprising a distal connection portion; a tool attached to, and extending from, the distal connection portion of the vascular pusher, the tool comprising a mesh of at least two sets of filaments and comprising a proximal connection portion having laser-cut proximal ends; and an attachment between the tool proximal connection portion and the vascular pusher distal connection portion adapted to keep the tool connected to the vascular pusher, the attachment having an outer diameter substantially equal to an outer diameter of the vascular pusher. A method of manufacturing an intravascular device is also provided.

An intravascular device with an improved attachment of its elements is provided. The intravascular device comprises a vascular catheter comprising a catheter jacket, an inner catheter element surrounded by the catheter jacket, and a distal connection portion, the distal connection portion comprising an extended portion of the inner catheter element extending distally beyond a distal end of the catheter jacket; a tool attached to, and extending from, the distal connection portion of the vascular catheter, the tool comprising a proximal connection portion; and an attachment between the tool proximal connection portion and the vascular catheter distal connection portion adapted to keep the tool connected to the vascular catheter, the attachment having an outer diameter substantially equal to an outer diameter of the vascular catheter. A method of attaching a tool to a vascular catheter is also provided.

This information processing device for use in the diagnosis of epilepsy is provided with: a receiving means for receiving the identification of a first site that is a target for the detection of an electric signal in a brain tissue in a subject; a wire information receiving means for receiving wire information; an identification means for identifying a second site that is suitable for the detection of the electric signal from the first site by an epilepsy diagnosis device placed in a blood vessel on the basis of the wire information, in which the blood vessel is selected from blood vessels in the brain tissue in the subject or in a part in the vicinity of the brain tissue; and a display control means for displaying the second site in the blood vessel on a predetermined display unit.

An improved system for supporting (e.g., localization and / or positioning of) intravascular devices discussed herein provides for example a multi-element arrangement. A set of struts optionally projects from the intravascular device and contacts the vessel walls. The localization and positioning of the pump may be provided by the struts and / or by use of a tether opposing a propulsive force to ensure localization.

Consistent with disclosed embodiments, systems, devices, methods, and computer readable media for digital control of an endovascular device and for controlling movement of an endovascular device may be provided. Embodiments may include a control device configured to be positioned outside a body of a patient. Embodiments may also include an input mechanism configured to receive input from a user. Embodiments may also include a device movement mechanism configured to control at least one movable portion of the endovascular device, the movable portion of the endovascular device configured for placement within the body of the patient.

An example system includes processing circuitry; and an endovascular device includes an expandable substrate configured to be delivered endovascularly to a trial therapy delivery location in a patient; one or more first electrodes positioned on the expandable substrate, wherein the one or more first electrodes are configured to deliver nerve tissue stimulation trial therapy to a target nerve tissue of the patient; and one or more second electrodes positioned on the expandable substrate, wherein the one or more second electrodes are configured to sense one or more activation signals of the target nerve tissue, wherein the processing circuitry is configured to determine whether activation of the target nerve tissue at the trial therapy delivery location satisfies a target nerve tissue activation threshold based on the one or more sensed activation signals.

An endovascular device may include (a) a proximal end, configured for communicating a pressure signal to a receiver; (b) a distal end comprising a pressure sensor that is based on (i) a piezoelectric polymer layer; and (ii) first and second electrodes, electrically insulated from each other, each contacting the piezoelectric polymer layer, wherein the pressure sensor derives the pressure signal from the first and second electrodes; and (c) a device body, which provides one or more conductors to carry the pressure signal from the distal end to the proximal end.

A dynamometer for detecting a force applied to an intravascular device, comprising: a housing; a channel in the housing configured to receive the intravascular device; and a sensor disposed in the housing to measure a force from the intravascular device to the housing. The dynamometer may also include a plurality of electronic components to process force readings from the sensor, transmit the plurality of readings to an external receiver, and indicate the plurality of force readings to a user.

An aspiration system (1) for an intravascular device includes an aspiration catheter (2) configured for insertion into an associated blood vessel: and a normally closed flow control valve (10) connected to control the aspiration of material from the associated blood vessel via the aspiration catheter. The normally closed flow control valve includes a flow inlet (14) operatively connected with the aspiration catheter, a flow outlet (16) operatively connectable with an associated vacuum pump, and a vacuum pull actuator (18) operatively connected to the flow outlet whereby vacuum at the flow outlet operates the vacuum pull actuator to open the normally closed flow control valve.

An intravascular device that includes a delivery sheath, a shaped braid comprising a distal braid layer and a proximal braid layer, and an inner member comprising a proximal end and a distal end, the inner member disposed between the proximal braid layer and the distal braid layer of the shaped braid. The intravascular device further includes a first configuration, the shaped braid and the inner member having a first length, and a second configuration, the shaped braid and the inner member having a second length wherein the first length is greater than the second length.

An implantable medical device includes an elongate member having a cross-sectional dimension that is less than 0.00085 inch, wherein the elongate member is made from a material comprising a platinum-tungsten alloy having a percentage of tungsten that is at least 10% by weight or alternatively the implantable medical device includes an elongate member made from a material comprising an alloy containing rhenium.

An intravascular device and methods of using the same are provided. An expandable portion includes struts movable between a collapsed position and an expanded position, and tissue modification element(s), each having a lower portion residing within or attached to one of the struts, an upper portion which extends outwardly from an outer surface of the strut and physically interacts with tissue during use. Irrigation and / or suction device(s) are provided for providing at least one of irrigation fluid and suction force at the expandable portion when operated.

A device for intravascular use for treating an endovascular membrane is provided. The device includes a catheter adapted to form a plurality of nested hoops rotatable relative to each other in a deployed position. The plurality of hoops may include an inner hoop having a smaller diameter than an outer hoop, each of the hoops connected to a corresponding tube. One or more motors may be used to rotate the hoops relative to each other, including in a counter-rotating manner. Related methods are also disclosed.

An endovascular therapy system includes an endovascular device. The endovascular device includes an elongated body configured to be introduced into vasculature of a patient. The endovascular device includes a coil structure at a distal portion of the elongated body. The coil structure includes at least a first coil portion and a second coil portion. The first coil portion can be configured to carry a plurality of electrodes. The second coil portion can be formed from a coiled wire such that the second coil portion together with the coiled wire defines a coiled coil. The coiled wire can extend distally of a distal end of the first coil portion and be configured to anchor the elongated body and the coil structure within the vasculature of the patient.

An intravascular treatment device is presented having an expandable frame made up of circular struts, straight struts, and bent struts forming a frame with circumference that varies over the length of the frame. Radiopaque markers can be positioned on the bent struts to indicate outer circumferences of the frame along the length of the frame. The device can be a stent or a clot retriever. If the device is a clot retriever, the proximal end of the expandable frame can be attached to a guide wire and the distal end of the expandable frame can be free to slide over the guide wire when the frame moves from a collapsed state to an expanded state and vice versa.

A medical tube or cannula comprising enhanced imaging structure and / or materials is provided. In some embodiments, an otherwise solid echogenic band may be interrupted by echolucent features and / or materials. In other embodiments, an echogenic band may be adjacent to an echolucent band, while in other embodiments one or more echolucent bands may be provided. In some cases, two or more spaced-apart echolucent bands may be provided. In some embodiments, an echolucent band may comprise an echogenic feature or materials. Generally, the juxtaposition of echogenic and echolucent materials enhances the imaging contrast of an intravascular device and allows easy identification and positioning of the juxtaposed echogenic and echolucent regions.

A medical device (e.g., blood flow assist system) can comprise: a shroud configured to house an impeller (or other movable device, whether imparting rotary or translational / linear movement) along a longitudinal axis of a device (such as a pump); a distal bearing comprising a peripheral ring having a first locating feature on a distal portion of an outer surface; and a strut module comprising a proximal ring having an inner surface and a plurality of struts extending distally from the proximal ring, the strut module comprising a second locating feature. The outer surface of the distal bearing can be configured to be slidably received within the proximal ring to engage the second locating feature with the first locating feature.

The present invention relates to a novel endovascular device incorporating a plurality of independent electrodes on an elastic helix that allows said electrodes to be positioned against the walls of blood vessels and can assume an extended configuration enabling the removal of the device. In particular, the invention proposes incorporating the plurality of electrodes onto a core made of an elastic material such as to preserve the elasticity of the core to the greatest extent possible, specifically by securing the plurality of electrodes on the surface of the core essentially by bonding and by means of the braiding characteristics of the plurality of electrodes.

Provided is an intravascular device for sensing or stimulating activity of neural tissue and having excellent delivery to blood vessels and high sensitivity of sensing or stimulation. An intravascular device (1) configured inside a blood vessel of a living organism, the first end portion (1a) of which has an electrode for sensing or stimulating activity of neural tissue located outside the blood vessel, the intravascular device (1) having: a wire member (10) having electrical conductivity; at least one electrode member (20) provided at the first end portion (1a) and electrically connected to the wire member (10); and a step difference reducing portion (30, 40) that reduces a step difference resulting from an outer diameter difference between the outer diameter of the electrode member (20) and the outer diameter of the wire member (10), the electrical resistance value between the electrode member (20) and the second end portion (1b) of the wire member (10) on the opposite side from the first end portion (1a) being 100 Ω or less.

An intravascular device may have a first configuration during deployment and a second configuration after deployment. The first configuration has a first radial strength; and the second configuration has a second radial strength. The first radial strength is less than the second radial strength. A system may include an intravascular device; a wire extending through the intravascular device to expand or contract the intravascular device; a proximal hub coupled to the wire; a distal hub coupled to the wire; and a plurality of tethers extending from an input device and through the intravascular device. At least a portion of the plurality of tethers has electrical conductivity. Application of energy to the at least a portion of the plurality of tethers may disengage the plurality of tethers from the intravascular device and fuse a luminal segment of the plurality of tethers, extending through the intravascular device, to the intravascular device.