127 results about "Intravascular device" patented technology

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 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such orientation as the wire and stent are advanced through said delivery catheter, and while said delivery catheter is withdrawn.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.

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 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 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.

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.

The present invention discloses an apparatus and method for navigating intravascular devices using uniquely identifiable navigation signals generated by artificial and / or natural beacons. The apparatus comprises signal generators that encode uniquely identifiable codes in generated beacon signals and transmit such signals via devices inserted into or otherwise connected to a patient's body. While navigating through the vasculature, an intravascular device receives, at its distal end, such beacon signals and transmits these signals to said apparatus connected outside the patient's body. The apparatus comprises signal processing units that decode the received signals, identify the source beacons based on their unique codes, and estimate the location of the distal end of the intravascular device relative to the location of the identified source beacons. The locations of the transmitting beacons and of the distal end of the intravascular device relative to these beacons are displayed in real time on a graphical interface.

The utility model relates to an intravascular antithrombotic magnetic control device which comprises an intravascular device and an external magnetic control device, the intravascular device comprises a medicine carrying assembly, a conveying catheter and a release control module, and the medicine carrying assembly and the release control module are respectively arranged in the conveying catheter; the external magnetic control device is used for fixing one end of the conveying catheter and is in communication connection with the release control module. The utility model has the benefits that the structure is simple, the design is reasonable, the release of suppository particles is accurately controlled through an external magnetic field, the minimally invasive treatment of a patient is realized, and safety and reliability are realized.

1. The name of the design product: sheath seat. 2. The use of the design product: for establishing a percutaneous access passage that facilitates intravascular devices. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The present disclosure relates to an intravascular device for thrombus removal. The device includes a core and a tube structure coupled to a distal section of the core. The tube structure includes a first, distal section and a second, proximal section. The apparatus also includes a wire mesh positioned in a gapped region between the first section and the second section of the tubular structure. The core is coupled to a first section of the tubular structure but is free to translate longitudinally relative to a second section of the tubular structure. Thus, applying a pulling force to the core may selectively contract the wire mesh and radially expand it to a location for contacting and removing a target thrombus.

Devices, systems and methods for treating diseases and disorders effecting the cardiovascular system of the human body are disclosed. An exemplary device in accordance with this disclosure comprises a shaft, tip member fixed to the shaft, and a probe extending beyond a distal surface of the tip member. In some useful embodiments, the tip member is relatively atraumatic and the probe is shaped so as to be more likely to produce trauma than the tip member.

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.

An intravascular ultrasound transducer assembly for monitoring stiffness of a vessel wall. The assembly comprises a catheter shaft sized and shaped for insertion inside a vessel having a vessel wall and one or more intravascular devices integrated on the catheter shaft. The one or more intravascular devices are configured to monitor at least one of i) at least one anatomic structure of the vessel wall in response to a pulse wave being launched on the vessel wall so that a pulse wave velocity is determined, by operating in a pulse echo mode to track the at least one anatomic structure, and ii) signals indicative of an ambient pressure of the ultrasound transducer assembly, wherein the ambient is defined by a balloon encapsulating one of the one or more intravascular devices. The pulse wave velocity and the ambient pressure are related to, i.e., proportional to, the stiffness of the vessel wall.

Devices and methods for the treatment of chronic total occlusions are provided. One disclosed embodiment comprises a method of facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein. The method includes inserting an intramural crossing device into the vascular lumen, positioning at least the distal tip of the crossing device in the vascular wall, advancing an orienting device over the crossing device such that an orienting element of the orienting device resides in the vascular wall, inserting a reentry device, and re-entering the true vascular lumen.

An orientable intravascular device for treating an aneurysm having "12 o'clock" markings on both proximal and distal ends, the intravascular device comprising: a packaging catheter having identical fixed non-circular inner lumens; a push wire having an occluding device releasably disposed on the distal end of the push wire, preloaded in a fixed circumferential orientation, with corresponding markings on the exterior of the packaging catheter; and a hub having an inner lumen shaped to engage with the outer lumen of the packaging catheter to deliver the delivery wire and occluding stent in a predicted orientation and maintain such orientation as the delivery wire and stent are advanced through the delivery catheter and simultaneously withdrawn. Methods of using the orientable intravascular device are also disclosed.

An intravascular device for pumping blood includes a catheter comprising a membrane chamber located between a proximal end and a distal end of the catheter. An inflatable membrane is disposed within the membrane chamber. The intravascular device includes a first one-way valve and optionally a second one-way valve configured to permit blood flow in a first direction. The first one-way valve may be positioned proximal to the membrane chamber, and the second one-way valve may be positioned distal to the membrane chamber. Methods related to intravascular devices and their respective use are provided.

An endovascular device includes a body formed with a tip portion, a mechanical treatment portion comprising an expandable portion, and a proximal portion proximate to the mechanical treatment portion. A tube is slidably disposed around at least a portion of the body, wherein the tube is configured to slide between a distal position of the tube where the tube covers at least the expandable portion and a proximal position of the tube where the tube is not covering the expandable portion. A distance traveled by the tube between the proximal position of the tube and the distal position of the tube is equal to a length of the mechanical treatment portion plus a predetermined distance.

The invention relates to an endovascular device with a stent structure and a guide wire. The stent structure has a substantially cylindrical main portion, and at least one point of connection with a guide wire, wherein the guide wire runs along the periphery of the stent structure and extends distally beyond the stent structure. According to an alternative embodiment, the stent structure connects to a tube through which a guide wire extends distally beyond the stent structure. The device according to the invention permits the simultaneous introduction of guide wire and stent structure into the blood vessel together with a microcatheter without there having to be, in the interim, a change between the guide wire, the microcatheter and the stent structure.

An intravascular device is disclosed comprising a core having a proximal section and a distal section and a tube wherein the distal section of the core enters the tube and is surrounded by the tube. The core includes a stepped shoulder located at a junction of the proximal and distal sections of the core. Coupling the proximal end of the tube to the stepped shoulder beneficially increases the torque transmitted along the tube to the distal end of the intravascular device while maintaining effective flexibility of the device.