56 results about "Guide catheter" patented technology

The invention discloses a thrombus excision system. An embolus is extracted through a mechanical embolus extraction device, a blood vessel is dredged, and revascularization of the blood vessel is achieved. A saccule guide catheter is put at the near end of the embolus part when the embolus is extracted, blood flow is temporarily blocked, and thus a fine crushed embolus generated in the embolus extraction process is prevented from being flushed to the far end of the blood vessel; meanwhile, for a relatively large embolus, a part of thrombus can also be sucked by virtue of the saccule guide catheter, and then the residual thrombus can be extracted by virtue of a thrombus exsector. The thrombus exsector, the saccule guide catheter and a delivery microcatheter are arranged on the thrombus excision system disclosed by the invention, wherein the thrombus exsector is used as a main component, an excision spring is arranged, and the release state of the excision spring is a conical spiral state. Compared with the prior art, the thrombus excision system has the advantages that the thrombus exsector is very soft, the minimal through size is 0.014' (0.36mm), the thrombus exsector can easily enter a cerebral vessel, a near-end protection technology is adopted in the operation process, and thrombus suction is combined with mechanical embolus extraction, so that the success rate of the operation is improved, and the complications are reduced.

Devices and methods for providing a pathway for fluid to flow around a main lumen of a guide catheter are disclosed. As one example, a delivery apparatus can include a handle including an outer housing and a flush port coupled to the outer housing, a shaft extending distally from the handle, and a main lumen extending axially through the shaft, where the main lumen is fluidly coupled to the flush port via a flush lumen extending between the flush port and the main lumen. The delivery apparatus can further include at least one axially extending channel fluidly coupled to and radially offset from the main lumen, the channel extending between a first location that is adjacent to the flush lumen and a second location that is adjacent to a distal end of the shaft.

Embodiments described herein relate to an implant delivery system for delivering an implant for reducing heart valve regurgitation. The implant delivery system may include an implant catheter disposed in an inner lumen of a guide catheter. The implant catheter may include one or more hypotubes disposed therein, each hypotube configured to receive an elongate member such as a braided tether. A distal end of the implant catheter may be coupled to an implant holder configured to receive the implant. The implant holder may define one or more channels, each channel configured to receive a portion of a respective elongate member. The elongate members configured to couple the implant to the implant holder and transition the implant between configurations. The implant configured to be disposed around a portion of a leaflet of a heart valve to improve coaptation of the heart valve.

A method of performing a neurovascular procedure includes the steps of providing an access assembly comprising a guidewire, access catheter and guide catheter; coupling the access assembly to a robotic drive system; and driving the access assembly to achieve supra-aortic vessel access. The guide wire and the access catheter are decoupled from the access assembly. A procedure assembly includes at least a guidewire and a procedure catheter. The procedure assembly is coupled to the robotic drive system; and used to perform a neurovascular procedure.

A suction catheter system is described with a suction nozzle that can extend from a guide catheter of the like. The suction nozzle can be positioned by tracking the suction nozzle through a vessel while moving a proximal portion of the suction extension within the lumen of the guide catheter. A suction lumen extends from the proximal end of the guide catheter through at least part of the guide catheter central lumen and through the suction tip. Desirable suction flow can be established using the guide lumen to facilitate the suction. Also, a delivery catheter is described with an elastic tip that can track closely over a guidewire. The elastic tip of the delivery catheter can be expanded to provide for the delivery of medical devices past the tip.

A guide catheter that is adapted to accommodate a left atrial appendage closure (LAAC) device being advanced towards a left atrial appendage (LAA) includes an elongate shaft extending from a proximal region to a distal region and a guide catheter hub that is coupled to the proximal region of the elongate shaft. The guide catheter hub includes a hub body, a Tuohy seal disposed relative to the hub body, a flat seal disposed relative to the hub body, and a mechanism disposed relative to the hub body that is adapted to releasably open the flat seal.

A method of delivering a transcutaneous dual valve replacement (TDVR) device to a patient includes the steps of advancing a guide catheter into the heart of the patient, advancing a support wire through the guide catheter and across the mitral valve of the heart of the patient, removing the guide catheter, advancing a delivery sheath over the support wire and across both the aortic valve and the mitral valve of the heart of the patient, advancing the TDVR device over the support wire and through the delivery sheath, removing the delivery sheath, expanding a first segment of the TDVR device in the mitral valve and a second segment of the TDVR device in the aortic valve, and removing the support wire.

The present invention is entitled "Thrombectomy and Stent Implantation System". The present invention provides a design capable of both mechanical thrombectomy and stent implantation for the treatment of occlusions in the cerebral vasculature, which provides a three-catheter setup. A first outer catheter has the largest diameter and can serve as a guide catheter, while also serving as a sheath for the other catheters. A second deployment catheter can be configured for aspiration of the occlusion and can include a proximal stepped or recessed segment at the distal tip that can act as a housing for a woven expandable stent. The outer diameter of the stepped segment can be lined with an inflation device having a woven stent disposed on its top. Inside the second deployment catheter is a microcatheter that can deliver a mechanical thrombectomy device to the target site to retrieve the occlusion in the vessel, after which the stent can be expanded and implanted in the vessel.

A transapical removal device that can be deployed in a catheter procedure to capture for removal or alteration a mitral valve clip or heart tissue, such as the anterior leaflet of the mitral valve, and methods of use are disclosed. The removal device includes a delivery catheter configured to be deployed near a mitral valve using a guide catheter. The delivery catheter has a snare head at the distal end, which assumes a collapsed state during movement of the delivery catheter through the guide catheter and deployed state for capturing a mitral valve clip or anterior leaflet. The snare head has one or more ablation delivery catheters configured to ablate tissue surrounding the pre-positioned mitral valve clip or anterior leaflet. In some arrangements within the scope of the present disclosure, the removal device includes a deployment mechanism for deploying a new transcatheter valve into the mitral valve.

Various medical procedures utilize two or more medical device components, including a first medical device component 34 advanced within a second medical component 32. One example is an elongate dilator 34 used in combination with a guide catheter 32. The guide catheter and the elongate dilator may be adapted to provide a rotational locking mechanism that locks the guide catheter and the elongate dilator together such that rotating one of the components causes rotation of both components. In some examples, the guide catheter and the elongate dilator may also cooperate to provide a relative axial lock between the two components.

The invention discloses a dynamic stiffness adjustable guide catheter based on a temperature response memory alloy, and relates to the technical field of medical instruments, the guide catheter comprises a main body tube and a tube seat, the main body tube is installed on the right side of the outer wall of the tube seat, the main body tube is composed of a pushing tube, a steering tube and an attaching tube, and the pushing tube, the steering tube and the attaching tube are each composed of an outer tube and an inner tube; the pushing pipe and the attaching pipe are connected with the steering pipe through linkage shafts, a sliding ring is arranged in an interlayer formed by the outer pipe and the inner pipe, and an elastic piece is arranged on the side, close to the inner pipe, of the outer wall of the sliding ring. By installing the main body tube, the universal driving shaft and the tube base, the function of automatically adjusting the rigidity in a segmented mode is achieved, the problems that the rigidity is manually adjusted, catheter supporting is insufficient and flexibility is poor are solved, the rigidity of the catheter can be automatically adjusted according to the temperature, the stability and reliability of the guide catheter are improved, and the operation complexity of medical staff is reduced.

A cell encapsulation device for implantation in a body includes one or more cell encapsulation layers, each of the one or more cell encapsulation layers including at least one membrane and a guide tube. The at least one membrane is semi-permeable. The at least one membrane forms a chamber for encapsulating cells and at least one entry port through the at least one membrane. The guide tube extends from the at least one entry port into the chamber. The guide tube includes a porous wall along at least a portion of its length. The guide tube is capable of guiding movement of a catheter inside the chamber.

The invention relates to the technical field of animal medicine, in particular to a self-adaptive control system and method for animal tracheal instillation. The system comprises a preoperative planning module which is used for reconstructing a three-dimensional model based on an individual animal airway CT image, simulating and optimizing administration parameters through computational fluid mechanics, and generating a personalized operation plan; the intraoperative navigation and execution module guides a catheter to reach a target pose through electromagnetic navigation, and performs closed-loop regulation and control on the instillation process through a respiration synchronous triggering algorithm and a pressure self-adaptive control algorithm based on real-time respiration and pressure signals; the central control module coordinates the work of each module; and the postoperative verification module quantifies actual and predicted deposition effects through image comparison. The problems that a traditional method depends on experience, cannot adapt to physiological changes in real time and is poor in drug administration precision are solved, the spanning from experience operation to individualized precise self-adaptive control is achieved, and the safety, repeatability and scientificity of animal experiments are remarkably improved.

An example delivery apparatus includes a shaft and a housing assembly. The shaft includes a distal end, a proximal end, and a lumen that extends between the distal end and the proximal end of the shaft. The housing assembly includes a proximal end and a distal end, the distal end of the housing assembly coupled to the proximal end of the shaft. The housing assembly further includes a retainer and a sheath hub. The retainer is at the distal end of the housing assembly. The sheath hub cooperates with the retainer to secure the shaft to the housing assembly. The sheath hub includes a non-threaded interface with the retainer.

A system for lacerating heart valve leaflets (20) includes a coronary guidewire (110) and a laceration device including an ablative cutting element (122). A system may include a first guidewire for insertion into a left ventricle and a guide catheter configured to translate along the first guidewire. The guide catheter may include a steering element configured to direct the coronary guidewire toward the coronary artery. The laceration device cooperates with the coronary guidewire to align the ablative cutting element with a nadir of a heart valve leaflet. A method of lacerating heart valve leaflets includes advancing the coronary guidewire into a coronary artery, translating the laceration device along the coronary guidewire to a position adjacent a heart valve leaflet, positioning the ablative cutting element in contact with a nadir of the heart valve leaflet, and lacerating the heart valve leaflet from the nadir to a free edge of the heart valve leaflet.

Apparatuses and methods for quickly and accurately positioning a stent within the ostium of a blood vessel so that the entire circumference of the proximal stent edge is within the aorto-ostial landing zone (AOLZ). Any of these methods and apparatuses may include an ostial positioning catheter including an annular sealing balloon, a distal reinforced shaft, and a hypotube extending proximally from a longitudinal side of the distal reinforced shaft. These ostial positioning catheters may be independently operated with a guide catheter and a stent deployment catheter.

The utility model relates to the technical field of medical instruments, in particular to a guiding catheter. A guiding catheter comprises a catheter body, a bending part is formed at the far end of the catheter body, the bending angle of the bending part is 30-80 degrees, and the length of the bending part is 2.5-200 mm; and the balloon is arranged close to the bending part and is communicated with the inner cavity of the tube body. The utility model provides a guide catheter which can easily pass through a C2 tortuous section of an internal carotid artery to reach a C2 horizontal section, and ensures the thrombus removal effect.

A guide extension catheter is provided that can provide a low-friction, large-diameter (for a given compatible guide catheter size) passageway proximal to and optionally through a target lesion within the vasculature, thereby reducing micro- and macro-vasculature damage due to the delivery of an interventional device. A guide extension catheter is disclosed that is positionable within a guide catheter and configured to receive an interventional device for insertion into the vascular system. The guide extension catheter includes a push member, a first reinforcing member in contact with the push member, and a radially collapsible tubular membrane in contact with the push member and the first reinforcing member. The tubular membrane is positioned distal to the first reinforcing member and is radially collapsed or wrapped around the push member prior to receiving the interventional device. The push member provides sufficient column strength to prevent longitudinal collapse of the tubular membrane during use.

This invention discloses a driving and positioning device for a guide tube in a vascular interventional robot. The guide tube control module includes a Y-shaped stage assembly, which comprises an upper Y-shaped valve and a lower driving and positioning device. The distal port of the Y-shaped valve is connected to the guide tube, and the proximal port is through which a guidewire passes. The guidewire enters the guide tube through the Y-shaped valve and travels along the inner lumen of the guide tube to the surgical site. The driving and positioning device includes a rack frame, on which the Y-shaped valve is fixed; a gear meshing with the teeth on the rack frame; a moving magnetic component mounted on the rack frame; and a fixed magnetic component interacting with the moving magnetic component. The fixed magnetic component is fixed to the housing of the terminal execution system. This invention can effectively position the guide tube control module before surgery without hindering the relative movement between the components during surgery, avoiding loss of accuracy caused by unnecessary relative displacement between components.

A medical assembly includes a guide catheter having a lumen extending therethrough and an electrocautery member slidingly disposed within the lumen. The electrocautery member has an elongate shaft having a proximal shaft segment and a distal shaft segment adapted to be movable between a puncture position and an incise position. In some cases, a hinge segment is disposed between the proximal shaft segment and the distal shaft segment and includes a leading edge adapted to form a puncture within a heart valve leaflet when the distal shaft segment is in its puncture position and a trailing edge adapted to incise the heart valve leaflet when the distal shaft segment is in its incise position. In some cases, the electrocautery member includes electrically isolated puncture and incise electrodes.

Devices, systems, and methods are disclosed for stabilizing a delivery device and / or a guide catheter device during the delivery and implantation of an artificial implant. Each of the delivery device and the guide catheter device may include a handle and a shaft (delivery shaft or guide catheter shaft) extending distally from the handle. The distal cap portion of each handle may be coupled to a stabilization clamp of a stabilization system to maintain the axial position of the handle relative to each other. The stabilization clamp is configured to allow rotation of the distal cap within it so that torque applied to the handle is transmitted to each shaft. The jaw portions of the stabilization clamp may be configured to balance or equalize the torque resistance to the rotation of the handle in a first (e.g., clockwise) direction with respect to a second opposite (e.g., counterclockwise) direction.

A flexible guide tube having a deflectable distal end is disclosed with at least first and second tensioning lines coupled to a deflectable distal end of the flexible guide tube. The first tensioning line is configured to deflect the distal end of the flexible guide tube in a first direction and the second tensioning line is configured to deflect the distal end of the flexible guide tube in a second direction that is opposite the first direction. A handle is coupled to flexible tube, the handle having a medial portion with a longitudinal axis substantially parallel with at least a portion of the flexible guide tube, a first actuator disposed proximal the medial section, and a second actuator disposed distal the medial section.

The invention provides a catheter with at least one electrode pair on the head of the catheter to collect data regarding the electrical activity of the heart and analyze the data using a high-performance mapping algorithm to map the interior portions of the heart to guide catheter ablation.

A method of performing a neurovascular procedure includes the steps of providing an access assembly comprising a guidewire, access catheter and guide catheter; coupling the access assembly to a robotic drive system; and driving the access assembly to achieve supra-aortic vessel access. The guide wire and the access catheter are decoupled from the access assembly. A procedure assembly includes at least a guidewire and a procedure catheter. The procedure assembly is coupled to the robotic drive system; and used to perform a neurovascular procedure.

Embodiments described herein relate to an implant delivery system for delivering an implant to reduce heart valve regurgitation. The implant delivery system may include an implant catheter disposed in an inner lumen of a guide catheter. The implant catheter may include one or more hypotubes disposed therein, each hypotube configured to receive an elongate member, such as a braided tether. A distal end of the implant catheter may be coupled to an implant holder configured to receive the implant. The implant holder may define one or more channels, each channel configured to receive a portion of a respective elongate member. The elongate member is configured to couple the implant to the implant holder and to transition the implant between configurations. The implant is configured to be disposed around a portion of a leaflet of a heart valve to improve engagement of the heart valve.

Example systems, devices, and techniques are described for lesion characterization. An example medical system includes one or more memories configured to store one or more memories configured to store fluoroscopy imaging data of a patient and processing circuitry communicatively coupled to the memory. The processing circuitry is configured to obtain the fluoroscopy imaging data, the fluoroscopy imaging data including imaging data of one or more calibration artifacts. The processing circuitry is configured to execute one or more machine learning models to determine, based on the imaging data of the one or more calibration artifacts, a calibration factor. The processing circuitry is configured to apply the calibration factor to the fluoroscopy imaging data and output a representation of the fluoroscopy imaging data based on the application of the calibration factor to the fluoroscopy imaging data.

The invention relates to a guide catheter for interventional therapy, belongs to the technical field of medical instruments, and solves one of the problems that an existing guide catheter is easy to slip from a coronary artery inlet, is easy to interfere with normal blood flow and cannot dynamically regulate and control the anchoring length. The guiding catheter comprises a guiding catheter body and an anchoring device, the anchoring device is installed on the guiding catheter body, and the anchoring device is used for anchoring the guiding catheter body at the coronary artery inlet so as to reduce the risk that the guiding catheter slips from the coronary artery inlet. The guiding catheter body is stably anchored at the coronary artery inlet through the anchoring device, so that the risk that the guiding catheter slips from the coronary artery inlet is reduced, the operation difficulty that an interventional instrument enters the coronary artery through the guiding catheter is reduced, and the operation safety and the operation efficiency are improved.

The invention relates to the technical field of medical instruments, in particular to a pulmonary artery interventional therapy guiding catheter which comprises a multi-layer cannula assembly, the multi-layer cannula assembly comprises a plurality of cannula parts which become thinner step by step from the first step to the Nth step and are sequentially nested, each cannula part comprises a catheter body, and an operation handle used for controlling the cannula parts is arranged at the near end of each catheter body; the far end of the catheter body is bent relative to the catheter body; the interventional instrument can penetrate through the Nth-step cannula piece so as to reach the target far-end blood vessel under the guidance of the multi-layer cannula assembly. According to the scheme, the defects that in the prior art, due to the fact that a guiding catheter is not matched with a pulmonary artery anatomical structure, the operation difficulty is large, time is long, and radiation exposure is large are overcome, and an interventional access is rapidly built in interventional therapy with complex and bent blood vessels.

Devices, systems, and methods for stabilizing delivery apparatus and / or guide catheter apparatus during delivery and implantation of a prosthetic implant are disclosed. Each of the delivery and guide catheter apparatus can include a handle and a shaft (delivery shaft or guide catheter shaft) extending distally from the handle. A distal cap portion of each of the handles can be coupled to a stabilizer clamp of a stabilizer system to retain a position of the handles relative to each other in an axial direction. The stabilizer clamps are configured to enable rotation of the distal cap therein so that torque applied to a handle is transmitted to a respective shaft. A jaw portion of the stabilizer clamp can be configured to balance or equalize toque resistance for rotation of the handle in a first (for example, clockwise) direction relative to a second opposing (for example, counterclockwise) direction.