134 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.

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.

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.

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.

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.

This invention provides a hollow balloon and protective umbrella integrated device, belonging to the field of medical device technology. The device includes a delivery tube, a cylindrical balloon, and a protective umbrella. The cylindrical balloon is located at the distal end of the delivery tube and has a coaxially arranged hollow cavity at both ends for blood flow. The sidewall of the cylindrical balloon has a receiving chamber for holding the filling medium. The protective umbrella is integrated at a predetermined distance from the distal end of the cylindrical balloon to intercept emboli that may fall during balloon support. During operation, the cylindrical balloon and protective umbrella are delivered synchronously with the delivery tube to reduce operational steps. This invention primarily addresses the technical problems in existing technologies, such as interrupted blood flow during balloon expansion, cumbersome operational steps leading to low surgical efficiency, and high risks associated with multiple instrument operations.

The utility model provides a kind of intracranial stent retrieval protection device, it is related to medical instrument technical field, including stent retrieval part, protection part and connecting part;The distal end of stent retrieval part is connected with connecting part;Connecting part distal end connects protection part, and the protection part is used to capture escaped embolus;Filter membrane is provided on the protection part, and the distal end of filter membrane is retracted together to middle part;Protection wire is peripherally arranged on the outside of protection part, filter membrane is arranged between protection wire and protection part, the proximal end of protection wire is connected to the connecting part, and the distal end of protection wire is gathered in the distal end of protection part;The utility model is combined by stent retrieval part and protection part, stent retrieval part and protection part are pressed and held together in microcatheter, when releasing, first release distal end protection part, then release stent retrieval part at embolus, let stent retrieval part bear stent retrieval function, protection part prevents embolus escape, for intracranial blood vessel and other small and tortuous blood vessel with inner diameter, the device has better performance.

The present teachings provide devices and methods of engaging, capturing, and retrieving emboli. Specifically, one aspect of the present teachings provide a device with visualization design to allow a clinician to assess device delivery, deployment and emboli capture process. The device is configured to allow a clinician easily identify various view orientations after the device being positioned inside a neuro-vasculature. The device is also configured to allow a clinician accurately assess its deployment and emboli capture status. Certain embodiments of the present teachings also provides devices and methods of use thereof to percutaneously remove blood clots with minimum risks.

The present invention relates to the field of ECMO technology and provides a blood-heating ECMO circulation kit and a control method thereof. The kit comprises a first blood delivery tube, a blood pump, a second blood delivery tube, a membrane lung oxygenator, a third blood delivery tube, and a human body cannula, which are sequentially connected to form a blood circulation loop; the electrothermal conductive coatings and / or metal wires at the head and tail ends of the first blood delivery tube, the second blood delivery tube, and the third blood delivery tube are all connected to sensors via sensor connectors; the electrothermal conductive coatings and / or metal wires of the first blood delivery tube, the second blood delivery tube, and the third blood delivery tube are connected together and connected to an intelligent heating controller and a plurality of terminators; the intelligent heating controller outputs three-level voltages, and realizes heating, charging, and data acquisition functions through different voltage controls, which is beneficial for observing thrombi and gas emboli in the blood circuit.

Devices and methods are described for occluding the left atrial appendage (LAA). The device excludes the LAA from blood flow to prevent blood from clotting within the LAA and subsequently embolizing, particularly in patients with atrial fibrillation. The implantable device is delivered via transcatheter delivery into the LAA and secured within the LAA. The implant comprises an expandable and compliant frame and an expandable and conformable tubular foam body. The device may have a thromboresistant cover at a proximal end. The frame may have recapture struts inclining radially outwardly from a central hub. The frame may have axially extending side wall struts, with adjacent pairs of side wall struts joined at one or more apexes. Anchors extend from the frame and into the foam to engage tissue.

The invention relates to the technical field of medical instruments, and provides a percutaneous reflux carotid artery blood supply reconstruction system which comprises an artery sheath, a filter, a pipeline and a vein sheath. The artery sheath, the filter and the vein sheath are sequentially connected through pipelines; the artery sheath comprises an artery sheath tube, a first balloon, a needle seat and a second balloon, and the artery sheath tube is coated with the first balloon; the first end of the needle seat is connected with the artery sheathing canal, the second end of the needle seat is coated with the second balloon and communicated with the second end of the needle seat, and the third end of the needle seat is connected with the pipeline; a first channel and a second channel are arranged in the artery sheath tube, the first channel is connected with the pipeline, and the two ends of the second channel are communicated with the first balloon and the second end of the needle seat respectively. According to the percutaneous reflux carotid artery blood supply reconstruction system, trauma to blood vessels is reduced, the risk of stroke caused by placement of a far-end protective umbrella is avoided, and the safety of an operation is improved; cerebral apoplexy caused by the fact that emboli enter the brain is avoided; and the blocking effect of the carotid artery is ensured.

The invention relates to the technical field of medical instruments, in particular to a blood bypass system. The system comprises an artery sheath assembly, a vein sheath assembly and a bypass pipeline. The arterial sheath assembly comprises an arterial sheath and an arterial sheath dilator, and the arterial sheath is configured to enter the common carotid artery to receive blood flow; the vein sheath assembly comprises a vein sheath and a vein sheath dilator and is configured to enter a vein blood vessel; the bypass pipeline is connected with the vein blood vessel and the vein blood vessel, comprises a filtering unit and is used for filtering embolus particles in the blood flow and releasing the filtered blood flow to the vein blood vessel; the artery sheath comprises a straight branch and a hemostasis valve, and the hemostasis valve is provided with an adjusting mechanism capable of repeatedly adjusting the opening diameter. By establishing an artery-vein shunt channel, blood reflux is guided, and the risk that emboli enter brain blood vessels is reduced; the adjustable hemostasis valve adapts to different instrument diameters, the sealing performance and the passing ability are guaranteed, and the operation convenience and safety are improved.

An oxygenator apparatus for use in an extracorporeal circuit. The apparatus includes a housing and a membrane assembly disposed within the housing. The membrane assembly includes a first plurality of gas exchange elements disposed in a first zone and a second plurality of gas exchange elements disposed in a second zone. The second zone is arranged concentrically around the first zone. The first and second plurality of gas exchange elements are fluidly open along a body and fluidly separated along a distal end. The first zone is configured to be fluidly coupled to an oxygen source and the second zone is configured to be fluidly coupled to a negative pressure source. A blood flow path includes a generally radial flow through the first zone to add oxygen to the blood and the second zone to separate gaseous micro emboli from the blood through the plurality of gas exchange elements.