113 results about "Catheter guide wire" patented technology

A Catheter Guidance Control and Imaging (CGCI) system whereby a magnetic tip attached to a surgical tool is detected, displayed and influenced positionally so as to allow diagnostic and therapeutic procedures to be performed is described. The tools that can be so equipped include catheters, guidewires, and secondary tools such as lasers and balloons. The magnetic tip performs two functions. First, it allows the position and orientation of the tip to be determined by using a radar system such as, for example, a radar range finder or radar imaging system. Incorporating the radar system allows the CGCI apparatus to detect accurately the position, orientation and rotation of the surgical tool embedded in a patient during surgery. In one embodiment, the image generated by the radar is displayed with the operating room imagery equipment such as, for example, X-ray, Fluoroscopy, Ultrasound, MRI, CAT-Scan, PET-Scan, etc. In one embodiment, the image is synchronized with the aid of fiduciary markers located by a 6-Degrees of Freedom (6-DOF) sensor. The CGCI apparatus combined with the radar and the 6-DOF sensor allows the tool tip to be pulled, pushed, turned, and forcefully held in the desired position by applying an appropriate magnetic field external to the patient's body. A virtual representation of the magnetic tip serves as an operator control. This control possesses a one-to-one positional relationship with the magnetic tip inside the patient's body. Additionally, this control provides tactile feedback to the operator's hands in the appropriate axis or axes if the magnetic tip encounters an obstacle. The output of this control combined with the magnetic tip position and orientation feedback allows a servo system to control the external magnetic field.

The present invention relates to medical devices for implantation or insertion into body lumens, for example, catheters, guidewires, stents and aneurysm coils. The devices of the present invention comprise electrically actuated materials, such as electroactive polymers and piezoelectric and electrostrictive materials, which enhance or expand their functionality.

A catheter guide wire is provided for guiding a catheter into a body cavity such as a blood vessel. The base material constituting the wire is made of an elastic alloy wire and subjected to a heat treatment such that its flexibility is sequentially increased from its proximal to distal end portions. A thermoplastic resin or/and a coil spring can be applied to at least the distal end portion of the wire base material. A method of manufacturing the catheter guide wire is also provided. The method is characterized in that the leading end side of the base material is divided into a plurality of areas and subjected to a heat treatment by changing the heat treatment temperature and the time conditions in units of the areas so that the flexibility of the base material is sequentially increased from the proximal to distal end portions of the leading end side.

A device for introducing a catheter guide wire into a vessel of a patient has a connector and a straightener for a J-shaped end of the guide wire, the connector having an axial bore, and its distal end and proximal end permitting a connection of the Luer type to a needle and to a syringe, respectively. The connector supports, on its inside, a sealing valve equipped with a slit, and the axial bore has, in its portion between the sealing valve and the distal end of the connector, a leaktight mating surface, the shape of which is such that it permits liquid-tight mating with the outer surface of the distal end of the straightener, when the latter is introduced into the connector via the sealing valve.

A catheter system allows for percutaneous intervention on the fast-moving structures inside the heart. The device consists of a steerable catheter sheath, an actuated, multi-degree of freedom moving catheter, and a catheter end effector, such as a fixation device. An actuator controls the motion of the catheter guide-wire in the catheter sheath to follow the motion of the target tissue. A control system controls the actuator and compensates for mechanical characteristics of the system including friction and backlash. A 3-D imaging system can be used to view the motion of the target tissue and the catheter end effector and produce 3-D imaging data. The 3-D imaging data can be used by the control system to track the target tissue and accurately position the end effector with respect to the moving target tissue allowing a clinician to repair the target tissue while it is moving. The system can be used to perform mitral valve annuloplasty wherein the actuated catheter compensates for the heart valve motion and an end effector fixation device is used to place fixation items, like anchors or staples, into the heart valve tissue to fix the annulus.

An arterial graft device and a process for positioning the same, wherein the device provides a first part positioned by conventional techniques within the artery, and a second part which is positioned and fixed on the first part by a segment which is provided on the first part so as to prevent a catheter guidewire—whereby the second part is positioned in place—from deviating and damaging arterial walls.

The invention disclosed herein is a steering system that can be attached to a catheter, guidewire or obturator that consists of polymeric tubing with a center lumen and at least three off-axis lumens evenly spaced around the circumference of the device shaft. The distal sections of the off-axis lumens are formed to induce curvature of the tip of the device by a physician controlled pressure source, which may be foot activated. Forming the individual lumens to induce curvature of the shaft of the device in a certain direction is done by making one side of each lumen significantly longer, such as with a one sided corrugated configuration. These embodiments induce curvature in predetermined directions when pressurized.

The invention discloses a catheter and guide wire control device for an interventional operation and a control method of the catheter and guide wire control device, belonging to the technical field of minimally invasive vascular interventional operations. The device comprises a clamping mechanism, a sleeve driving assembly and a brake braking assembly, wherein the clamping mechanism comprises a sleeve, a braking part and a clamping part, after the clamping part with a clamping end is mounted in the braking part, the braking part is in threaded connection with the sleeve, a notch is formed in one end, with the clamping end, of the clamping part, and the clamping end is in conical fit with the sleeve; the sleeve driving assembly is used for driving the sleeve to rotate; the brake braking assembly is used for clamping or loosening the braking part. With the method, a catheter or a guide wire can be clamped, pushed and twisted, and force measurement also can be realized; the efficient, accurate and nondestructive clamping and loosening for the guide wire and the catheter can be realized, and the catheter and the guide wire can be cooperatively operated.

Transcatheter guidewire delivery systems, catheter assemblies and associated methods for percutaneous guidewire delivery across heart valves are disclosed herein. A catheter assembly configured in accordance herewith includes an elongated tubular component and an alignment assembly at a distal portion of the tubular component and which is adapted to be located at a target location adjacent a heart valve of a patient. In one embodiment, the alignment assembly deploys to a shape set loop configuration with a side port in an open configuration positioned to allow advancement of a guidewire to exit the catheter in an aligned path with a leaflet coaptation region of the heart valve. In another embodiment, the alignment assembly has a plurality of spaced apart side ports that a guidewire may advance therethrough and toward the heart valve. In some embodiments, a wire guide is used to align the guidewire with a selected side port.

A loading device for facilitating the loading of a guidewire into a lumen defined by a catheter. A catheter may have a shaft extending from a proximal end to a distal end, defining one or more lumens having one or more catheter ports. A guidewire has a flexible wire-like structure extending from a proximal end to a distal end. The guidewire loading device defines a passage having a first and second loading port. A portion of a catheter may be partially inserted into one of the loading ports, such that a catheter port communicates with the loading device passage. Then, one of the guidewire ends may be inserted into the other loading port. The guidewire may be more easily inserted through the loading device passage, into the catheter port, and thus into the catheter lumen.

The invention discloses a leading wire/conduit operating torque detection device of an endovascular interventional surgical robot, and belongs to the technical field of manufacturing of medical equipment. A transmission gear, which is used for implementing a leading wire/conduit twisting operation, is arranged on the torque detection device, and a spring coil is fixedly connected to the inner circumferential surface of the transmission gear; the spring coil is formed by an outer ring and an inner ring which are concentric via four spring sheets; the four spring sheets are uniformly distributedin a circumferential direction of the spring coil, so that a cross structure is formed; four resistance strain gauges are fixed to the four spring sheets, and the four resistance strain gauges are connected, so that a full bridge converter is formed; and the full bridge converter is connected to an external signal output circuit via a conductive slip ring. According to the device, online detection of slave end leading wire or conduit operating torque can be achieved, so that torsional resistance of a conduit/leading wire can be sensed by doctors, and subsequently, the operating state of a slave end operation can be sensed.

The invention discloses water-based ultraviolet curing resin, coating based on the water-based ultraviolet curing resin and a medical catheter. The water-based ultraviolet curing resin is high in tensile strength, capable of being firmly attached to polyurethane high polymer materials and good in biocompatibility. When hydrophilic lubricating coating is irradiated by ultraviolet, a urethane acrylate photoactivity low polymer, N-vinyl pyrrolidone and vinyl silicone perform free radical copolymerization reaction and perform graft polymerization with the catheter and guide wire surface which are irradiated by the ultraviolet to form a polyurethane-polyvinyl pyrrolidone (PVP)-organosilicon high-molecular polymer film. The bonding force between a film forming matter and polyurethane catheter materials is good, and the film forming matter is not liable to drop off. The coating is free of toxicity and good in biocompatibility. When the coating is in the environment having water, such as contacting with liquid, the surface of the coating quickly absorbs water to form a hydration layer, frictional resistance generated in the moving process of machines can be remarkably reduced, and the hydrophilic lubricating coating does not drop off when pipe inserting is performed.

The invention discloses a preparation method of a hydrophilic coating on a guide wire surface of a medical catheter, and the product of the preparation method. The method comprises the following steps: dissolving aqueous dispersion of resin and hydrophilic polymer(s) in water, mixing and stirring to obtain a uniform solution; adjusting the pH value of the solution, adding crosslinking agent(s), stirring uniformly, and carrying out ultrasonic treatment; immersing a guide wire of the medical catheter into the obtained solution, pulling, curing and drying to form a film; the resin is water-basedamino resin, water-based acrylic resin, water-based epoxy resin, waterborne polyurethane or derivatives thereof; the hydrophilic polymer(s) is/are one or more of polyvinylpyrrolidone, polyvinyl alcohol, xanthan gum, agarose and sodium alginate; the crosslinking agent(s) is/are one or two of a siloxane crosslinking agent, an epoxy crosslinking agent, an aziridine crosslinking agent, a carbodiimidecrosslinking agent and a polyisocyanate crosslinking agent. The coating, prepared by the method, on the guide wire of the medical catheter has good biocompatibility, is simple to operate and easy to implement, beneficial to large-scale production and remarkable in hydrophilic lubrication property.

The invention provides a device for threading an end of a guidewire into a catheter, the catheter having a tip connected to an inner lumen of the catheter, the inner lumen dimensioned to receive the guidewire therethrough. The device comprises: a guidewire receiving port; a catheter tip receiving port; a channel connecting the guidewire receiving port to the catheter tip receiving port. The channel is dimensioned to pass the outer thickness of the guidewire therethrough and the channel is dimensioned to block passage of the outer thickness of the catheter therethrough. A contiguous section of the guidewire receiving port, the catheter tip receiving port and the channel form an open passageway from which the guidewire and catheter, once the guidewire is threaded into the catheter, are disengaged from the device. The open passageway may be covered by a flap mounted to the device which releasably cover,s the contiguous open section of the guidewire receiving port, the catheter tip receiving port and the channel.

The invention provides a mechanical robot system for precise interventional operation of microfine filaments and tubes. The system includes a main-end device and an execution mechanism, and the main-end device and the execution mechanism adopt a master-slave control pattern to achieve movement of a catheter, a guiding filament and a working catheter. The execution mechanism detects the axial forceof the catheter through a force sensor, current in corresponding magnitude is output by means of a current control pattern of an axial feedback motor of the main-end device, thus corresponding obstruction torque is generated on a rope wheel of the main-end device, and a user can feel the resistance performed on the catheter when pulling a transmission rope of the main-end device. The introduction, retraction and rotation of the catheter, the guiding filament and the working catheter (a sacculus stent) can be achieved stably and precisely. The cooperative movement of the catheter, the guidingfilament and the working catheter can be achieved at the same time, the movement of the catheter, the guiding filament and the working catheter is independent, the force feedback function is improved,the success rate of operations is increased, and a doctor can feel the resistance performed on the catheter and the guiding filament in an operating room in real time.

A guide wire control device and methods of use are described herein. A guide wire is retained by a lock mechanism to a sliding assembly. The sliding assembly controllably moves within a stationary assembly. The guide wire control device provides improved control of guide wires during transcatheter surgical procedures.

The invention discloses a driven end device of an interventional operation robot and a control method thereof, and belongs to the technical field of a minimally invasive blood vessel interventional operation. The device comprises a main body part, a catheter holder, a guide wire clamper, a torsional assembly and a force measuring assembly, wherein the catheter holder is used for holding a catheter; the guide wire clamper is used for clamping or releasing a guide wire; both the catheter holder and the guide wire clamper can be detachably arranged on the main body part; the catheter holder comprises a medical three-way valve and a clamping assembly; the medical three-way valve is connected with the catheter and is fixed on the main body part through the clamping assembly; the torsional assembly is used for driving a screw cap of the medical three-way valve to drive the catheter to rotate; the force measuring assembly is used for detecting the pushing force of the catheter; the torsionalassembly, the catheter holder and the guide wire clamper are detachably arranged on an upper cover of the main body part. A sanitary isolating membrane can be conveniently added in the operation process; good sanitary conditions are reached; the device is suitable for practical application.

A robot hand slave for vascular interventional surgery that manipulates a catheter-guide wire, which is characterized in that it includes two hollow ultrasonic motors, two linear ultrasonic motors, and two ordinary motors, and the linear ultrasonic motor drives the hollow ultrasonic motor to move along the guide rail to drive the guide rail. The wire or catheter moves linearly, and two ordinary motors are used to drive two locking mechanisms to clamp the guide wire and catheter respectively; the two locking mechanisms are respectively fixedly connected with the rotors of the corresponding hollow ultrasonic motors, and the guide wire and catheter are positioned separately In the respective locking mechanisms, they are coaxial with the rotation center of the hollow ultrasonic motor, pass through the hollow ultrasonic motor, and rotate with the rotation of the hollow ultrasonic motor. The invention has the advantages of simple structure, good operability and convenient use, and is beneficial to improving operation efficiency.

The invention belongs to the technical field of medical appliances, particularly relates to a hystero-salpingography and recanalization surgical instrument and a use method thereof. The invention aims to overcome the defect of the existing hystero-salpingography and recanalization surgical instruments, designs a special sheath guide device as well as a canula and a guide wire which are matched with the sheath guide device for hystero-salpingography and recanalization, and the surgical instrument consists of the sheath guide device with a ballonet, an inner core of the guide device, the canula and the guide wire. The inner core of the sheath guide device is smooth and hard and has round and blunt head end, and when the rear end of the inner core is locked, the front end thereof is protruded out of the front end of the sheath guide device and is seamlessly attached with the sheath guide device; the part, which is placed in a uterine cavity, of the sheath guide device is short and is right placed in the middle of the uterine cavity; metal marks which can not be penetrated by X ray are arranged at the head end parts of the sheath guide device and the canula; and the hard material of the canula has stronger torsion, the head end parts of both the canula and the guide wire are provided with a single flexure degree of 15 to 30 degrees, and the direction marks at the rear parts have the same bending directions as those of the head end parts.