88 results about "Intravascular catheter" patented technology

Aspects of the present disclosure are directed to intravascular electrophysiology catheters which utilize electrodes on flexible electronic circuit(s) to facilitate reduced assembly complexity and cost. In one example embodiment, a distal tip assembly of an electrophysiology catheter is disclosed. The distal tip assembly including a catheter shaft, flexible circuitry, and a distal tip coupled to a distal end of the catheter shaft. The catheter shaft includes an outer surface with a trench extending into the outer surface, and the flexible circuitry is inserted into the trench and coupled to the catheter shaft. The flexible circuitry includes one or more electrodes configured and arranged to sense electrophysiological characteristics of tissue.

Aspects of the present disclosure are directed to intravascular electrophysiology catheters which utilize electrodes on flexible electronic circuit(s) to facilitate reduced assembly complexity and cost. In one example embodiment, a distal tip assembly of an electrophysiology catheter is disclosed. The distal tip assembly including a catheter shaft, flexible circuitry, and a distal tip coupled to a distal end of the catheter shaft. The catheter shaft includes an outer surface with a trench extending into the outer surface, and the flexible circuitry is inserted into the trench and coupled to the catheter shaft. The flexible circuitry includes one or more electrodes configured and arranged to sense electrophysiological characteristics of tissue.

Intravascular catheters are disclosed herein. In accordance with some embodiments, the present technology includes a catheter including an elongate tubular sidewall defining a lumen extending therethrough and having a proximal end, a distal end, and a length between the proximal end and the distal end. The sidewall may include a plurality of filaments, at least some of which are interwoven with other ones of the plurality of filaments. The catheter may be configured to be positioned about a turn in the blood vessel having a radius of curvature of no greater than 24 mm, and wherein, when the distal end of the catheter is distal to the turn, the lumen remains at least 70% unobstructed while torque applied to the sidewall at the proximal end of the catheter is transmitted to the distal end.

An intravascular blood flow sensing system is provided. The system includes an intravascular catheter or guidewire with a flow sensor that obtains flow data of blood flow within a blood vessel. The system includes a processor circuit that communicates with the intravascular catheter or guidewire. The processor circuit receives the flow data from the intravascular catheter or guidewire, determine a plurality of values based on the flow data, and outputs a plot of the plurality of values to a display. The plot includes peak associated with coronary reactivity testing (CRT). The processor circuit can also automatically change between a louder volume and a softer volume for audio output of the flow data. The processor circuit can additional communicate with a device other than the flow sensor (e.g., ECG, pressure sensor, etc.), and graphical representations of the flow data and the data received from the other device can be independent scaled.

The disclosure relates to devices and methods for the treatment of edema, which devices use a restrictor for flow compensation. Devices and methods of the invention further use a flow-restrictor in the circulatory system, upstream of an intravascular pump, to balance pressure changes induced by the pump and to compensate for downstream flow. The device may be provided as an indwelling, intravascular catheter with a mechanical pump such as an impeller and a selectively deployable restrictor such as an inflatable balloon. Congestive heart failure or edema is treated by\operating the pump in an innominate vein and using the restrictor for flow compensation, to restrict the upstream flow and thus amplify or maintain pressure reduction at the lymphatic outlet.

Apparatus for passing a blocked vein, including:(a) an intravascular catheter body defining at least one lumen;(b) a radially expandable anchor at a distal end of said catheter; and(c) a penetration tool sized and shaped to be delivered by the lumen to a point distal of the expandable anchor, the penetration tool including a tip and configured for being pushed through venous blockage more than one week old and present with a young's modulus greater than 1 MPa. Optionally, the penetration tool tip comprises a sharpened tip. Optionally or additionally, the penetration tool tip is controllably bendable.

The invention refers to endovascular catheters and methods useful to endovascular surgery. In particular, it refers to support catheters with balloons that are used for the placement or the forwarding of the guidewire through demanding tortuosity and important vascular stenoses in cases where the guidewire needs the best possible backup support of the catheter. This is achieved with the development of an endovascular support catheter (1) with a mobile balloon (22), which has the ability to move along the body of the catheter (2), at its distal part. The movement of the balloon (22) is achieved with the use of two mobile external rings (13) and (18), one inner wire circuit (23), (24), and one control handle (13) (17) which is found at the proximal end of the device (1). The mobile balloon allows the catheter to move inside the vessel even when it is inflated and basically anchored within the vessel.

Disclosed is a medical imaging system, including a processor circuit configured for communication with an x-ray imaging device movable relative to a patient and an intravascular catheter or guidewire sized and shaped for positioning within a blood vessel of the patient, wherein the processor circuit is configured to receive a first angiographic image of a first length of the vessel and a second angiographic image of a second length of the vessel, wherein the first image is obtained at a first position and the second angiographic image is obtained at a second position. The processor is further configured to generate a roadmap image of a combined length of the blood vessel by combining the first image and the second image, and to receive intravascular data associated with the blood vessel, and to co-register the intravascular data to corresponding locations in the roadmap image; and output the roadmap image and a graphical representation of the intravascular data at the corresponding locations in the roadmap image.

The utility model relates to an intravascular catheter supporting device which comprises a supporting body formed by weaving a plurality of metal wires. The supporting body is provided with rhombic meshes and comprises a supporting part and a telecentric part, one end of the supporting part is connected with one end of the telecentric part, and a connecting ring is arranged at the other end of the telecentric part; the end, close to the connecting ring, of the telecentric part is a guide section, a metal wire of the guide section is in a non-woven state, and the length of the guide section is 5-10 mm; one end of the pushing wire is fixedly connected with the connecting ring; wherein at least one metal wire in the plurality of metal wires is a developing wire. The intravascular catheter supporting device disclosed by the embodiment of the utility model can be arranged at the position where the middle catheter is possibly bent in advance, so that the middle catheter turns, the bending angle of the middle catheter is reduced, support is provided for establishment of a channel, and establishment of the channel is facilitated.

The present invention is entitled "Intravascular Catheter". The present invention provides an intravascular catheter comprising a distal porous cuff segment having a plurality of unobstructed openings defined radially outward from an annular inflation chamber, wherein the distal porous cuff segment is non-rotatable. The catheter further comprises a tubular body disposed proximal of the distal porous cuff segment, the tubular body having a sidewall extending from a proximal end to the distal porous cuff segment and an internal lumen defined axially therethrough. The sidewall of the tubular body has an inflation supply channel extending in a direction parallel to an axial direction of the intravascular catheter.

The present application provides an intravascular catheter and a laser ablation catheter system, the intravascular catheter comprising a distal tube body and a fiber bundle; the distal tube body has a receiving cavity arranged in an axial eccentric manner, the distal tube body forms a thin cavity wall and a thick cavity wall in a radial opposite arrangement around the receiving cavity, and the cavity wall connected between the thin cavity wall and the thick cavity wall smoothly transitions in thickness; the fiber bundle is arranged in the receiving cavity and is arranged near the thin cavity wall in the axial eccentric manner of the receiving cavity. In this way, the receiving cavity is arranged eccentrically, the thick cavity wall provides support against radial collapse, avoiding the collapse of the distal tube body when bending; the thin cavity wall can reduce the bending resistance, so that the distal tube body is oriented to bend towards the side of the thin cavity wall, reducing or avoiding the occurrence of twisting and S-bending. The fiber bundle is arranged eccentrically in the receiving cavity and bends synchronously with the distal tube body, ensuring that the light output direction of the fiber bundle is consistent with the bending direction, and improving the stability of laser transmission.

An intravascular therapy device (10) includes an intravascular catheter (12); a helical coil (14) disposed at a distal end (13) of the intravascular catheter; at least one cutter (16) mounted on the helical coil; and a rotary control (18) disposed at a proximal end (15) of the intravascular catheter and operatively connected to rotate the helical coil.

An intravascular catheter for nerve activity ablation and / or sensing includes one or more needles advanced through supported guide tubes (needle guiding elements) which expand to contact the interior surface of the wall of the renal artery or other vessel of a human body allowing the needles to be advanced though the vessel wall into the extra-luminal tissue including the media, adventitia and periadvential space. The catheter also includes structures which provide radial and lateral support to the guide tubes so that the guide tubes open uniformly and maintain their position against the interior surface of the vessel wall as the sharpened needles are advanced to penetrate into the vessel wall. Electrodes at the distal ends of the guide tubes allow sensing of nerve activity before and after attempted renal denervation. In a combination embodiment ablative energy or fluid is delivered to ablate nerves outside of the media.

Described herein are systems, devices and methods that enable dynamic modification of the physicochemical properties of a hydrogel during its in vivo formation and delivery by a catheter. In some example embodiments, an extended endoluminal hydrogel delivery device is employed for delivering a hydrogel within a given body cavity, such as within the lumen of a blood vessel. In some example embodiments, a hydrogel precursor, as a non-viscous liquid, is injected through an intravascular catheter and crosslinking of the hydrogel precursor is initiated within a distal region of the catheter. The crosslinking process is controlled, by a control means associated with a distal region of the catheter, to control or modify one or more properties of the hydrogel. The properties may be controlled such that a hydrogel is suitable to embolize the specific target or deliver drugs or other materials beneficial to the site.

The present invention, in some embodiments thereof, relates to a devices and methods for intravascular denervation and assessment thereof and, more particularly, but not exclusively, to devices and methods for renal denervation. Some embodiments of the invention relate to an intravascular catheter configured for ultrasonic ablation of the tissue, comprising a plurality of piezoelectric transceivers. In some embodiments, an intravascular distancing device is provided, the device adapted for obtaining at least a minimal distance between an ultrasound emitting element and a tissue, such as the blood vessel wall. Some embodiments of the invention relate to assessment of renal sympathetic denervation (RSD) treatment effectiveness. Some embodiments of the invention relate to processing echo of signals, such as processing of signals to characterize physical and / or mechanical properties of the blood vessel.

An endovascular system for targeted photothermal ablation of perivascular nerves is disclosed. A catheter includes a fluid lumen communicating with outlet orifices, and an electromagnetic radiation emitter positioned within a support structure that apposes the array against a vessel wall. A proximal console independently controls irradiation and injection parameters. In use, a nanofluid comprising plasmonic nanoparticles, such as gold nanorods tuned for near-infrared absorption, is injected into or through the vascular wall and subsequently irradiated intraluminally; the nanofluid absorbs energy and converts it to heat to ablate adjacent nerve fibers while reducing non-target tissue heating.

The invention provides systems and methods for controlling the operation of intravascular catheters to treat fluid management disorders such as acute decompensated heart failure, chronic heart failure, ascites, lymphedema, chronic kidney disease, cardiac insufficiency, cardiac value regurgitation, or plural effusions. In particular, the invention provides a console, for use in a clinical setting, where the console controls operation of an intravascular catheter. The console includes a controller with treatment logic and a connected hub. The hub has a connection point to which an intravascular catheter can be connected. When the intravascular catheter is connected to the hub, the controller executes instructions and operates devices on the catheter to relieve the fluid management disorder.

An intravascular catheter device includes an expandable portion secured to a flexible catheter tube. The expandable portion is slidable relative to a sheath to selectively expose a plurality of struts for outward bowing movement and compression within said sheath. An incising element associated with one of the struts is configured to incise atherosclerotic material when the intravascular catheter device is placed within a blood vessel, the struts are exposed for outward bowing movement, and the expandable portion is retracted along the blood vessel.

To provide a peri-vascular tissue ablation catheter capable of delivering an ablation liquid for circumferentially damaging tissue in or near an outer layer of a vessel of a human body.SOLUTION: Provided is an intravascular catheter for peri-vascular and / or periurethral tissue ablation includes multiple needles advanced through supported guide tubes which expand with open ends around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, and / or nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The system also includes means to limit and / or adjust the depth of penetration of the ablative fluid into and beyond the tissue of the vessel wall. The preferred embodiment of the catheter includes structures which provide radial and lateral support to the guide tubes so that the guide tubes open uniformly and maintain their position against the interior surface of the vessel wall as the sharpened injection needles are advanced to penetrate into the vessel wall.SELECTED DRAWING: Figure 1

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.

The present invention relates to an endovascular catheter for use in atherectomy or thrombectomy, comprising a catheter body having a proximal and a distal end, the catheter body extending in a longitudinal direction of the catheter, and a tissue ablation means positioned at the distal end of the catheter, the tissue ablation means being arranged for ablating thrombotic tissue adhering to the inside of a vessel wall, the catheter body comprising a reorientation means comprising at least one shape memory element for reorienting the distal end of the catheter, the reorientation means being arranged so that, upon selective activation of the shape memory element, the distal end of the catheter can be reoriented in at least two different directions.

Devices and methods of the disclosure use an intravascular catheter with deployable sealing elements to create a fluid trap around an outlet of a lymphatic duct and drain lymph passively to a collection vessel that may be pressurized to a predetermined pressure or a partial vacuum. Due to the fixed pressure, the device creates a low-pressure area at the lymphatic duct, which drains lymph passively without any mechanical pump or impeller. In certain aspects, a device includes a catheter for insertion into a vein of the venous angle of a patient, with proximal and distal sealing elements deployable to seal the vein to thereby define a fluid trap around the lymphatic outlet. A port within the fluid trap opens to a drainage lumen extending along the catheter to a collection vessel. The device may be configured such that the drainage lumen passively drains the fluid trap into the collection vessel.

An intravascular catheter for nerve activity ablation and / or sensing includes one or more needles advanced through supported guide tubes (needle guiding elements) which expand to contact the interior surface of the wall of the renal artery or other vessel of a human body allowing the needles to be advanced though the vessel wall into the extra-luminal tissue including the media, adventitia and periadvential space. The catheter also includes structures which provide radial and lateral support to the guide tubes so that the guide tubes open uniformly and maintain their position against the interior surface of the vessel wall as the sharpened needles are advanced to penetrate into the vessel wall. Electrodes near the distal ends of the needles allow sensing of nerve activity before and after attempted renal denervation. In a combination embodiment ablative energy or fluid is delivered from the needles in or near the adventitia to ablate nerves outside of the media while sparing nerves within the media.

A co-registration system includes a processor circuit that receives x-ray fluoroscopy images of a blood vessel while an intravascular catheter moves through the blood vessel. The processor circuit also receives intravascular data from the intravascular catheter as the catheter moves through the blood vessel. The processor circuit generates a 2D pathway based on the fluoroscopy images. The processor circuit generates an additional 2D pathway from a 3D CT model. The processor circuit performs a co-registration between the intravascular data and the CT-based 2D pathway based on a mapping between corresponding locations of the fluoroscopy-based 2D pathway and the CT-based 2D pathway. The processor circuit performs an additional co-registration between the intravascular data and the 3D CT model based on the first co-registration and outputs the 3D model with a graphical representation of the intravascular data to a display.

An intravascular catheter device includes an expandable portion having a proximal common end secured to a distal end of a flexible catheter tube, a distal common end spaced apart from the same, and struts extending therebetween. The expandable portion is controllably moved between a first position where at least a mid-portion of each of the struts is moved outward so as to extend beyond an outer diameter of the catheter tube and a second position where the mid-portion of the struts are moved inward so that the struts extend at or within an outer diameter of the catheter tube. A tip member is located distal to a distal end of the expandable portion, and a limiter is interposed between a distal end of the expandable portion and a proximal end of the tip member.

The intravascular treatment device 10 includes an intravascular catheter 12, a helical cage 14 configured to be rotated within a vascular occlusion disposed within a blood vessel of an associated patient by the intravascular catheter, and a treatment device 16 configured to be moved to a position within the helical cage while the helical cage is being rotated within the vascular occlusion and further configured to be operated to treat the vascular occlusion while being disposed within the helical cage.

An intravascular catheter-based filtering device (1) designed to capture and remove emboli, thus preventing distal embolization, comprising: - a tubular filter (2) comprising a flexible porous material and defined by a distal element and a proximal element, i.e. by a main body (3) and a funnel (4); i. the length of said main body (3) is suitable to extend within an appropriate vascular tract; said main body (3) comprises: a) a distal end (5) suitable to be coupled radially with said tract and to seal hermetically to said tract when the device is in active configuration, said distal end (5) being provided with selectively actuatable closing means so that said distal end is designed to open when the device is in active configuration and to close before the device is retracted; b) a proximal end (6); ii. said funnel (4) forms an extension of said main body (3), the base of said funnel being located at said proximal end (6), - a support structure assembly (8) comprising: i. a support catheter (11) extending within said main body (3); ii. one radially expandable distal structure (9) fixed to said distal end (5); iii. one radially expandable proximal structure (10) positioned in correspondence of said proximal end (6), said distal structure (9) and said proximal structure (10) being fixed at least at one end to said support catheter (11).

The endovascular catheter comprises a guide wire inner cavity, a filling inner cavity and an outer sheath tube from inside to outside, the far end of the filling inner cavity is communicated with a telescopic balloon, the far end of the outer sheath tube is connected with an integrated cutting and recycling net used for wrapping the outer surface of the balloon, and the outer surface of the balloon is provided with a plurality of grooves. The integrated cutting and recycling net is composed of a sparse net section used for cutting and a dense net section used for recycling. The device has the advantages that fine and gridding fragmentation of plaques can be achieved, large sharp fragments are prevented from being generated, meanwhile, the generated fragments can be captured in time and safely taken out of the body, the risk of far-end embolism is fundamentally reduced, and the operation efficiency is improved.

An intravascular blood extraction system for bloodletting through a previously placed peripheral intravascular catheter, the intravascular blood extraction system having a cannula within a protective housing and / or a plurality of structures and / or within structures, the cannula forms a laminar fluid path extending from a distal fluid inlet to a lateral or proximal fluid outlet orifice directly coupled to the protective housing and / or the plurality of structures and / or structures, and a slider or plunger actuator is coupled to the fluid outlet orifice of the cannula such that distal advancement of the slider advances the cannula within the fluid vessel.

The invention discloses an intravascular continuous oxygenation monitoring catheter system and method integrated with optical fiber sensing, and belongs to the technical field of medical monitoring. The method comprises the following steps: synchronously acquiring at least two paths of main measurement optical signals and one path of physical disturbance reference optical signal through a multi-core optical fiber integrated on an intravascular catheter probe; based on the physical disturbance reference light signals, motion artifact components caused by conduit physical disturbance are isolated in real time; determining a transfer coefficient from the motion artifact component to each main measurement optical signal; and feed-forward compensation correction is carried out on the main measurement optical signal based on the motion artifact component and the transfer coefficient so as to obtain a corrected measurement signal capable of reflecting the real oxyhemoglobin saturation change. According to the method, the virtual redundant reference light path is introduced and self-adaptive feed-forward compensation is carried out, so that the influence of motion artifacts on the measurement precision can be effectively eliminated, and the signal-to-noise ratio and the response speed of intravascular continuous blood oxygen monitoring are remarkably improved.