215 results about "Embolus" 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.

An intra-vessel transcatheter filter 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, namely a main body (3) and a funnel (4); i. said main body (3) having a length adapted to extend within a suitable vessel zone; said main body (3) comprising: a) a distal end (5) that is adapted to be radially coupled with said zone and hermetically sealed to it when the device is in an active configuration, said distal end (5) being provided of selectively actionable closure means so that said distal end is designed to be open when the device is in an active configuration and closed before the device retraction, b) a proximal end (6); ii. said funnel (4) forming an extension of said main body (3), with the funnel base located at said proximal end (6). • a support structure assembly (8) comprising: i. a supporting 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 in an end to said supporting catheter (11).

The thrombus catcher comprises a thrombus catching section, a wall attaching section and a closing section, the thrombus catching section is of a conical hollow structure with the near end open and the far end diameter gradually reduced, the wall attaching section is woven along the near end of the thrombus catching section and is of a mesh enclosure structure, and the closing section is woven along the near end of the wall attaching section and is arranged in a stranded mode. The thrombus capturing section, the wall attaching section and the closing-in section are integrally formed and woven and are coaxially arranged, the thrombus capturing device is integrally woven, the overall flexibility is good, the thrombus capturing device is not prone to being bent and folded in a blood vessel, thrombus capturing is prevented from being affected, the wall attaching section of the thrombus capturing device can be tightly attached to the blood vessel wall after being released, thrombus is prevented from escaping, and the thrombus capturing effect is good. The woven fan blades wrap the thrombus to prevent thrombus leakage during recovery, the coaxial design enables the thrombus to be not prone to displacement, and the thrombus capturing capacity in the operation is greatly enhanced.

The present disclosure relates to devices and methods for removing emboli from one or more blood vessels. In an example, an embolus removal apparatus includes a delivery catheter, an embolus collection basket connected to a basket shaft extending through the delivery catheter, a retrieval shaft extending through the delivery catheter, and at least one capture mechanism configured to couple an embolus to a distal portion of the retrieval shaft. The retrieval shaft is can be navigated, with the embolus carried thereby, toward and into a cavity of the basket, and can optionally release the embolus in the basket and optionally be navigated to capture and direct another embolus, if required, to the basket. Once all emboli are collected in the basket's cavity, the apparatus can be retrieved from the patient's body with the emboli captured therein.

Thrombectomy systems having curved tubular cutting devices, and methods of using them, are provided. These systems, devices, and methods can (i) effectively cut and remove a variety of thrombus tissue from blood vessels, including soft, tough, and hard tissue; (ii) safely self-collect and remove tissue particles to avoid release of emboli; and, (iii) effectively treat a blood vessel with a reduced risk of suffering vessel injuries that can lead to increased stenosis.

Thrombectomy systems having curved tubular cutting devices, and methods of using them, are provided. These systems, devices, and methods can (i) effectively cut and remove a variety of thrombus tissue from blood vessels, including soft, tough, and hard tissue; (ii) safely self-collect and remove tissue particles to avoid release of emboli; and, (iii) effectively treat a blood vessel with a reduced risk of suffering vessel injuries that can lead to increased stenosis.

The utility model relates to a novel thrombus removing instrument, which belongs to the technical field of thrombus removing instruments and comprises a hollow transition tube body and a hollow catheter seat, the transition tube body is communicated with the catheter seat through a second Luer joint, and a suction tube is arranged at one end, far away from the transition tube body, of the catheter seat; the thrombus removing instrument further comprises an operation guide wire, the operation guide wire penetrates through the transition tube body, the catheter base and a suction tube, one end of the operation guide wire extends out of the transition tube body to be connected with an operation handle, and the other end of the operation guide wire extends out of the suction tube to be connected with the head end. A circulating groove is formed in the joint of the operation guide wire and the head end; a first Luer taper is arranged on the side wall of the transition pipe body, and the first Luer taper is communicated with the interior of the transition pipe body.

A prosthetic heart valve delivery catheter includes an embolic filter to provide integrated embolic protection to inhibit the release of emboli into the aorta, the aortic arch or branch vessels, and other vasculature during transvascular heart valve replacement procedures. The embolic filter will usually be fixedly or movably attached to a shaft of the delivery catheter proximal of the prosthetic heart valve.

A clot retrieval device is described herein. The clot retrieval device includes a capturing basket that is deployable to the side of a clot in a blood vessel. The capturing basket is configured to allow for the clot to ingress into the capturing basket and surround at least a portion of the clot.

Devices, systems and methods for filtering embolic particles that may be generated from a medical procedure including protection of the major branching vessels from the aorta, and catches and filters emboli that may be generated during the TAVR procedure. The filter devices disclosed herein form an improved seal against the vessel wall that is activated by flowing blood. Devices described herein also allow for the closing of the ends of the filter device after capture of emboli, providing further security against accidental loss of emboli post capture.

Devices and methods establish and facilitate retrograde or reverse flow blood circulation in the region of the carotid artery bifurcation in order to limit or prevent the release of emboli into the cerebral vasculature such as into the internal carotid artery. The methods are particularly useful for interventional procedures performed through a transcarotid approach or transfemoral into the common carotid artery.

The thrombus extraction stent comprises a stent body and a plurality of thrombus capturing components, a plurality of grids are arranged on the surface of the stent body, and each thrombus capturing component is connected to one grid on the stent body and stored in the corresponding grid when the stent body is in a contraction state. When the stent body is in an expanded state, the thrombus capturing components protrude out of the corresponding grids, the thrombus capturing components form a U-shaped outline, the two open ends of each thrombus capturing component are connected with different parts of the grids of the stent body respectively, the closed ends of each thrombus capturing component protrude out in the direction perpendicular to the U-shaped plane relative to the two open ends, and a plurality of capturing hooks are arranged inwards. Any one capturing hook is not coplanar with the closed end of the thrombus capturing component, the hook tip of the capturing hook faces the stent main body, and the projection of the hook tip on the stent main body is located in the corresponding grid. According to the thrombus capturing device, the capturing hook and the thrombus capturing component are combined, thrombus difficult to capture can be effectively captured, the overall capturing efficiency is improved, and it is ensured that the thrombus is removed more thoroughly.

The invention belongs to the technical field of medical data processing, and particularly relates to a bladder cancer vessel tumor embolus assessment method and system based on multi-modal feature fusion, and the optimization method comprises the steps: obtaining and preprocessing the pathological information and image data of a bladder cancer patient, extracting a CT image corresponding to a tumor, and determining a region of interest; image omics features are extracted from the region of interest of the CT image, and deep learning features are extracted from the maximum tumor cross section; carrying out feature selection processing on the obtained radiomics features and deep learning features, and inputting the processed features into a fusion model; and outputting a probability value of'lymphatic vessel invasion 'by the fusion model to obtain an evaluation result. A multi-modal machine learning model is constructed by fusing radiomics features and deep learning features extracted from a CT image, and the objective of the invention is to noninvasively and accurately evaluate the lymphatic vessel infringement state of bladder cancer before an operation, so that a key basis is provided for clinical individualized treatment decision-making.

Thrombectomy systems having curved tubular cutting devices, and methods of using them, are provided. These systems, devices, and methods can (i) effectively cut and remove a variety of thrombus tissue from blood vessels, including soft, tough, and hard tissue; (ii) safely self-collect and remove tissue particles to avoid release of emboli; and, (iii) effectively treat a blood vessel with a reduced risk of suffering vessel injuries that can lead to increased stenosis.

The invention provides a balloon and protective umbrella integrated device of a hollow structure, and belongs to the technical field of medical instruments.The device comprises a pushing pipe, a cylindrical balloon and a protective umbrella, the cylindrical balloon is arranged at the far end of the pushing pipe, the cylindrical balloon is coaxially provided with a hollow cavity channel with the two ends communicated, the hollow cavity channel is used for blood flow to penetrate through, and the protective umbrella is arranged in the hollow cavity channel. A containing cavity used for containing a filling medium is formed in the side wall of the cylindrical balloon. The protective umbrella is integrally arranged at the far end which is a set distance away from the cylindrical balloon and is used for intercepting the falling emboli in the supporting process of the cylindrical balloon; during working, the cylindrical balloon and the protective umbrella synchronously realize conveying along with the conveying catheter, so that the operation steps are reduced; the technical problems that in the prior art, during balloon dilatation, blood flow is interrupted, operation steps are tedious, operation efficiency is low, and the risk of multi-instrument operation is high are mainly solved.

A device (100) for removing emboli from a cerebral artery, comprising (i) a catheter (150), (ii) a funnel (130) biased to assume an expanded state in which a mouth (133) of the funnel is wider than a proximal end (1311) of the funnel, (iii) a stem (132) attached to the proximal end of the funnel and extending proximally through the catheter, and (iv) a handle (120) at a proximal portion of the catheter, the handle comprising: (a) a deployment knob (122) configured to deploy an embolus from the catheter; the device includes (a) a catheter (126) operably coupled to the rod so as to be manually operable to transition the funnel toward a deployed expanded state in which the funnel is in sealing engagement with the catheter such that suction applied by the catheter draws the emboli into the mouth, and (b) a stabilizer (126) configured to stabilize the device in the deployed state by applying tension to the rod.

Devices and methods establish and facilitate retrograde or reverse flow blood circulation in the region of the carotid artery bifurcation in order to limit or prevent the release of emboli into the cerebral vasculature such as into the internal carotid artery. The methods are particularly useful for interventional procedures performed through a transcarotid approach or transfemoral into the common carotid artery.

The invention provides a filter assembly including a string or wire such that a lasso type cincture is effected, said filter being openable and closeable while in deployed within a bodily vessel. A string lengthen or shorting adjustment mechanism, such as a ratchet or reel allows more length of string into the device or alternatively to shorten the length of available string in the system. The described invention, when used to ameliorate venous clots and most arterio-venous dialysis grafts, a filter-tipped aspirator is used downstream from the clot to capture and remove dislocated emboli. A method of using same is disclosed.

The application discloses a plugging device and relates to the technical field of medical devices. The plugging device comprises a plugging body, an elastic connecting piece and a hanging component. The plugging body is adapted to the shape of a target plugging area. One end of the elastic connecting piece is arranged on the plugging body. One end of the hanging component is connected with the other end of the elastic connecting piece, and the hanging component is adapted to be hung on the tissue of the target plugging area. The plugging device for cauliflower-shaped left atrial appendages is made of degradable materials, can be implanted into the left atrial appendages of a patient through a minimally invasive catheter intervention operation to realize plugging of the left atrial appendages, can guide the climbing of the endothelial tissue in the left atrium, and can realize complete degradation of the device in the human body after endothelialization. Finally, the plugging effect is realized by the patient's autologous tissue, the formation and shedding of thrombus embolus in the left atrial appendages are effectively prevented, and the risk of stroke is greatly reduced.

A clot retrieval device is provided. The clot retrieval device includes a capturing basket having an opening at a proximal end where the capturing basket is deployable downstream from a clot in a blood vessel. The capturing basket is configured to surround a portion of the clot and the opening in the proximal end of the capturing basket is configured to reduce in size such that the capturing basket conforms around the portion of the clot and be retrieved after the capturing basket conforms around the portion of the clot.

An embolic protection device is disclosed for placement through the descending aorta and over the aortic arch to inhibit emboli release into the aortic side branch vessels while allowing simultaneous access to the aortic valve by at least one interventional and / or diagnostic catheter being introduced from the descending aorta. The filter body comprises a tubular porous mesh material and has an open upstream end to allow entry of blood flow and emboli and an open downstream end to allow entry of multiple catheters. The filter body includes at least one catheter access path parallel to said at least one passage through the filter body, and the filter body has one or more support structures or wires that provide longitudinal stiffness to the device to prevent compression or movement of the filter during a procedure.

To provide a device, system, and method for filtering embolic particles that may occur during medical treatment. **Solution**: Devices, systems, and methods for filtering embolic particles that may occur during medical treatment include protecting major branch vessels from the aorta and capturing and filtering emboli that may occur during a TAVR procedure. The filter devices disclosed herein form an improved seal against the vessel wall that is actuated by blood flow. The devices described herein can also close both ends of the filter device after embolus capture, enhancing safety against the unexpected disappearance of captured emboli.

A prosthetic heart valve delivery catheter includes an embolic filter to provide integrated embolic protection to inhibit the release of emboli into the aorta, the aortic arch or branch vessels, and other vasculature during transvascular heart valve replacement procedures. The embolic filter will usually be fixedly or movably attached to a shaft of the delivery catheter proximal of the prosthetic heart valve.

Devices and methods establish and facilitate retrograde or reverse flow blood circulation in the region of the carotid artery bifurcation in order to limit or prevent the release of emboli into the cerebral vasculature such as into the internal carotid artery. The methods are particularly useful for interventional procedures performed through a transcarotid approach or transfemoral into the common carotid artery.

The present disclosure provides an embolic protection device comprising a metal wire or metal ribbon with an elliptical or flat cross-section, pre-formed into a spiral structure wound around its short axis. The formed embolic protection device can be deployed within a tubular object and introduced into the target blood vessel through the tube. The elasticity of the material enables it to revert to a predetermined shape, thereby effectively intercepting emboli. The device is characterized by a smaller curvature, enhanced recovery to the preset shape, and reduced interference with blood flow.

The thrombus extraction stent comprises a hollow tubular stent body and thrombus capturing components arranged on the outer wall of the stent body in the circumferential direction, the stent body has a radial shrinkage state and a radial expansion state, when the stent body is in the shrinkage state, the thrombus capturing components are tightly attached to the outer wall of the stent body, and when the stent body is in the expansion state, the thrombus capturing components are tightly attached to the outer wall of the stent body. When the stent body is in an expanded state, the thrombus capturing component protrudes out of the outer wall of the stent body and comprises a first capturing rod, a second capturing rod and an elastic component, and the elastic component is connected between the first capturing rod and the second capturing rod. The thrombus capturing component is arranged in the stent body and can deform so that a thrombus capturing space defined by the first capturing rod, the second capturing rod, the elastic component and the stent body can be changed, and therefore it is guaranteed that the thrombus capturing component can always keep the good thrombus capturing capacity, and the situation that the thrombus falls off or is not captured is avoided.

Devices and methods are configured to allow transcarotid or subclavian access via the common carotid artery to the native aortic valve, and implantation of a prosthetic aortic valve into the heart. The devices and methods also provide means for embolic protection during such an endovascular aortic valve implantation procedure.

The invention provides a filter assembly including a string or wire such that a lasso type cincture is effected, said filter being openable and closeable while in deployed within a bodily vessel. A string lengthen or shorting adjustment mechanism, such as a ratchet or reel allows more length of string into the device or alternatively to shorten the length of available string in the system. The described invention, when used to ameliorate venous clots and most arterio-venous dialysis grafts, a filter-tipped aspirator is used downstream from the clot to capture and remove dislocated emboli. A method of using same is disclosed.

Embodiments of the present disclosure are directed to methods, systems and devices for embolic protection, and more specifically, to methods, systems, and devices for embolic protection for surgical systems and methods including, for example, delivery / implanting systems as well as methods for delivering or implanting prosthetic heart valves into the heart, or performing a cardiac or blood vessel procedure, where capturing or otherwise trapping emboli dislodged or created during the procedure is necessary so as to prevent complications associated therewith (e.g., strokes).

Methods, devices, and systems establish and facilitate retrograde or reverse flow blood circulation in the region of the carotid artery bifurcation in order to limit or prevent the release of emboli into the cerebral vasculature such as into the internal carotid artery. The methods are particularly useful for interventional procedures, such as stenting and angioplasty, atherectomy performed through a transcarotid approach or transfemoral into the common carotid artery, either using an open surgical technique or using a percutaneous technique, such as a modified Seldinger technique or a micropuncture technique.