71 results about "Intravascular device" patented technology

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 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.

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.

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.

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.

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.

In one exemplary embodiment, an endovascular device may include a hollow shaft having a proximal end and a distal end, and sized for insertion into a blood vessel. The endovascular device may also include a control line having a proximal end and a distal end, and extending through the hollow shaft. The endovascular device may also include an actuatable working element located proximate the distal end of the hollow shaft, and configured to receive an actuation force transmitted via the distal end of the control line. The endovascular device may further include an actuator configured to exert the actuation force on the proximal end of the control line, to thereby cause relative movement between the control line and the hollow shaft and to actuate the working element. The hollow shaft may also include a cable formed of a plurality of wound wires and including a proximal segment, at least one transition segment, and a distal segment. The proximal segment, at least one transition segment, and distal segment may include different numbers of wires.

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.

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 an expandable structure at a distal portion of the elongated body. The therapy system (e.g., the endovascular device) can include a plurality of electrodes carried by the expandable structure. The elongated body can be configured to transform between a body delivery configuration and a body deployed configuration. In the body deployed configuration, the distal portion of the elongated body defines a coiled portion. The coiled portion can be located proximal of the expandable structure. The coiled portion is configured to limit or prevent an axial force applied to the elongated body from being transferred to the expandable structure or the plurality of electrodes when the expandable structure and the elongated body are positioned within the vasculature of the patient.

Endovascular devices with enhanced single-beam cut patterns are disclosed. An elongated member includes a plurality of fenestrations defining a plurality of axially extending beams interspersed between a plurality of circumferentially extending rings. The beams are formed using a double pass cutting method in which a blade makes two rotationally offset passes of a cut at a given longitudinal location of the elongated member. The resulting beams have an enhanced structure that avoids overly sharp edges and minimizes structural weaknesses.

The present disclosure describes a microfabricated intravascular device configured for high axial strength, while the microfabricated intravascular device also maintains effective flexural flexibility. A pipe member includes a series of circumferentially extending rings that are interconnected by a series of axially extending beams. The transverse cutouts separate and define the rings. A series of axial cutouts are aligned with the beam and extend partially from the beam into the adjoining ring such that the beam length is nested partially within the axial length of the adjoining ring. This increases the functional length of the beam to provide flexural flexibility while still having sufficient ring structure to provide effective axial stiffness.

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.

Inventors have synthesized peptides allowing an engagement of intact CD31 molecules on all the healthy endothelial cells and resting blood platelets and leukocytes that can enter in contact with an implanted device. Those cells can therefore receive the “leave-me-alone” signal delivered by the trans-homophilic engagement of CD31, which is essential to maintain the homeostasis in the circulation and vascularized tissues. Thrombotic or life-threatening occurrence of hemorrhagic or thromboembolic complications have impaired the use of endovascular devices. The devices bearing the mimicking peptides of the present invention are rapidly integrated, because they are perceived by blood platelets and leukocytes as a healthy endothelium, a “self” component. Furthermore, their ability to be rapidly endothelialized with a physiologic endothelial cell phenotype also limits platelet and leukocyte activation at the site of device implantation in the long-term. Accordingly, the present invention relates to peptides mimicking the trans-homophilic CD31-CD31 domain 1 and 2 intercellular interaction.

The present disclosure describes a microfabricated intravascular device configured for high axial strength while also maintaining effective bending flexibility. A tubular member includes a series of circumferentially extending rings interconnected by a series of axially extending beams. Transverse cuts separate and define the rings. A series of axial cuts are aligned with the beams and extend partially from the beams into the adjoining rings such that the beam length is partially nested within the axial length of the adjoining rings. This increases the functional length of the beams to provide bending flexibility while still having sufficient ring structure to provide effective axial stiffness.

An example system includes processing circuitry; and an intravascular device comprising: an expandable substrate configured to be delivered within a blood vessel to a test therapy delivery site within a patient; one or more first electrodes positioned on the expandable substrate, where the one or more first electrodes are configured to deliver a nervous tissue stimulation test therapy to target nervous tissue of the patient; and one or more second electrodes positioned on the expandable substrate, where the one or more second electrodes are configured to sense one or more activation signals of the target nervous tissue, wherein the processing circuit is configured to determine whether activation of the target nervous tissue at the test therapy delivery location satisfies a target nervous tissue activation threshold based on the one or more sensed activation signals.

The present disclosure is directed a method of facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein. The method may include providing a first intravascular device having a distal portion and at least one aperture and positioning the distal portion of the first intravascular device in the vascular wall. The method may further include providing a reentry device having a body and a distal tip, the distal tip having a natural state and a compressed state and inserting the distal tip, in the compressed state, in the distal portion of the first intravascular device. The method may further include advancing the distal tip, in the natural state, through the at least one aperture of the first intravascular device.

Intravascular devices and methods for intramural delivery of dissection fluids and infusates are disclosed herein. In some embodiments, the systems include an infusion assembly that can access a vessel wall at a depth within a layer of the vessel wall and advance a tissue manipulation component at approximately the same depth within the vessel wall to create an intramural space within the vessel layer. The infusion assembly can further deliver an infusate that includes a therapeutic drug or other agent into the intramural space.

Tissue anchoring devices including a radially expandable frame having a plurality of longitudinal struts and a plurality of deployable anchors configured to penetrate a stent graft and tissue, and systems for delivering and deploying the tissue anchoring devices at a target location are provided. The adjacent longitudinal struts are interconnected by a plurality of expandable struts, and a ring of these expandable struts may be angled radially outward relative to a remainder of the expandable struts in an expanded configuration. Each of the plurality of anchors may include one or more anti-buckling mechanisms to facilitate penetration into the graft / tissue.