84 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 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.

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.

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 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.

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.

The present invention provides a thrombectomy apparatus and device. The thrombectomy device includes a thrombectomy component and a control component. The thrombectomy component includes a thrombectomy stent including an outer mesh stent and an inner mesh stent nested within the outer mesh stent. The control component includes a movement control member and a mounting member. The movement control member is passed through the mounting member and extends out of a distal end thereof and then is coupled to a distal end of the thrombectomy stent, and the outer mesh stent is proximally attached to the mounting member. A proximal end of the inner mesh stent is attached to the mounting member or to the movement control member. The movement control member is able to control and change a diameter of the thrombectomy stent during movement of the movement control member toward a proximal or distal end of the thrombectomy device, adapting the thrombectomy device to various lumens. This can reduce possible damage to a lumen while allowing for effective removal of occlusive material.

The invention provides an embolism protection device, and belongs to the technical field of intracranial interventional therapy. The device comprises a conveying guide wire, a first protective umbrella and a second protective umbrella, wherein a first cavity is formed in the conveying guide wire; the first protection umbrella is arranged at the far end of the conveying guide wire and provided with a one-way control component which is communicated with the two sides in a one-way mode. The second protective umbrella is arranged on the conveying guide wire at the near end of the first protective umbrella and is used for intercepting escaped emboli; a suction hole communicated with the first cavity is formed in the conveying guide wire between the second protective umbrella and the first protective umbrella; the suction hole sucks liquid between the first protection umbrella and the second protection umbrella, and a negative pressure area is formed between the first protection umbrella and the second protection umbrella and used for accelerating blood circulation near the device; when the second protective umbrella is contracted, the suction hole continues to work and is used for preventing emboli from escaping; the protective umbrella is mainly used for solving the technical problems that in the prior art, a protective umbrella hinders blood circulation, emboli cannot be collected actively, and the emboli are prone to escape during contraction.

The application discloses a medical tissue glue modified formula and injection method for treating esophageal varices, and relates to the field of tissue glue; the medical tissue glue modified formula and injection method for treating esophageal varices introduce polyoxyl glycol as a modifier, not only reduce the brittleness and hardness of n-butyl alpha-cyanoacrylate after polymerization, make the formed vascular embolus more flexible, significantly reduce the cutting risk of traditional hard glue block to thin-walled mucosa, thereby reduce the incidence of postoperative glue leakage ulcer and rebleeding; at the same time, polyoxyl glycol itself as a hardener can synergistically damage the vascular endothelium, accelerate thrombosis and vascular fibrosis, and improve the long-term occlusion effect; secondly, the addition of dragon's blood extract or nano-silver and other antibacterial components in the formula can actively inhibit local bacterial colonization, effectively reduce the risk of postoperative sepsis for the clinical pain points of low immunity and easy infection of patients with cirrhosis.

The invention relates to the technical field of computer-aided medical treatment, and discloses a pulmonary embolism grade evaluation method and device, equipment and a storage medium. Firstly, the embolus image and the cardiopulmonary structure index are obtained in an automatic mode, the step of manually obtaining data is omitted, time is saved, and errors caused by manual operation can be reduced. Then, performing prediction evaluation based on the embolism sub-image to obtain a preliminary pulmonary embolism level prediction result; combined prediction evaluation is carried out based on the embolism sub-images and the cardiopulmonary structure indexes in different modes, pulmonary embolism information is captured more comprehensively, and a combined pulmonary embolism level prediction result is obtained. And finally, integrating the preliminary pulmonary embolism grade prediction result and the combined pulmonary embolism grade prediction result, mutually supplementing and verifying the two results, and finally obtaining a target pulmonary embolism grade prediction result. And compared with a prediction result obtained by only depending on a single method, the accuracy of the prediction result of the target pulmonary embolism level is improved.

To provide a catheter with a suitable integrated embolic protection device. [Solution] The artificial heart valve delivery catheter includes an embolic filter to provide integrated embolic protection to prevent the release of embolus into the aorta, aortic arch, or branch vessels and other vascular systems during transvascular heart valve replacement procedures. The embolic filter will typically be fixed or movably attached to the shaft of the delivery catheter proximal to the artificial heart valve.

The present application relates to a kind of embolus and its preparation method, including the tubular first spiral component with inner cavity, the second spiral component nested in the outer side of the first spiral component and at least part is placed in the inner cavity of the first spiral component Fixed component, wherein the first spiral component includes radiopaque material, the second spiral component includes bioabsorbable material, the both ends of the fixed component are connected to the both ends of the second spiral component respectively, to fix the first spiral component and the second spiral component.The double-layer structure of the embolus is provided with fixed component, so that the embolus not only has the performance of degradable and alleviates the effect of occupying position, but also makes it have better structural stability in aneurysm.

This invention provides a graded embolization protection device, belonging to the field of vascular interventional medical device technology. The device includes a delivery guidewire, with multiple protection units fixedly arranged at intervals at the distal end of the guidewire. Each protection unit has a proximal open end and a distal closed end, and each protection unit has a flexible support frame for support at a target location. Multiple open areas are formed on the support frame, and a soft, elastic filter membrane is arranged on the edge of each open area or on the sidewall of the entire support frame to cover the open area. In use, the multiple protection units are axially deployed graded along the target location, with the flexible support frame of each protection unit fully conforming to the inner wall of the blood vessel, and the soft, elastic filter membrane intercepting emboli in the blood flow. This addresses at least the technical problems of existing embolization protection devices, such as poor flexibility due to the high coverage of the rigid support structure, difficulty in adapting to complex vascular morphologies, and poor fit with the vascular wall, leading to embolism escape.

Systems and methods are described for removing an embolus in a cerebral vessel of a patient. The assembled system of devices includes a catheter having a catheter lumen and a distal end and a catheter advancement element extending through the catheter lumen. A tapered distal end region of the catheter advancement element extends distal to the distal end of the catheter. The assembled system of devices is advanced together towards an occlusion site in a cerebral vessel of a patient visible on angiogram. The occlusion site includes an angiographic limit of contrast and an embolus downstream of the angiographic limit of contrast. The catheter advancement element is advanced to a location past the angiographic limit of contrast without crossing the embolus. The catheter is advanced to position the distal end of the catheter at a treatment site located past the angiographic limit of contrast and aspiration applied.

The invention discloses an ultrasonic suppository breaking method and a device using the method, the device comprises a modulation frequency generator, a high-frequency generator, an ultrasonic output device, a first field effect switch and a second field effect switch, and the first field effect switch is a switch of the matching relation between the modulation generator and the high-frequency generator; through real-time control over the ultrasonic output frequency, when ultrasonic waves are coupled with human blood, the thrombus breaking effect in the blood vessel is better through occurrence of different frequencies, the best control frequency is determined through experimental comparison, the output frequency of the ultrasonic waves is controlled through the control frequency, and the thrombus breaking effect in the blood vessel is better. The device can continuously keep the optimal thrombus breaking effect, the device is provided with a switch, the device can be better controlled, meanwhile, the wrist winding type structure at the output end can be better matched with the human body, and the treatment effect is better.

A medical assembly for ingesting a thrombus or embolus includes an outer catheter and a middle catheter that is slidingly disposed within the outer catheter. A funnel is coupled to the middle catheter. The funnel is adapted to fit within an outer catheter lumen when the middle catheter is moved proximally relative to the outer catheter and to extend out of the outer catheter lumen when the middle catheter is moved distally relative to the outer catheter. An inner catheter is slidingly disposed within the middle catheter lumen. An ingestion sleeve is coupled to the inner catheter and passes over the funnel periphery and extends proximally therefrom. Moving the middle catheter distally with respect to the inner catheter causes the ingestion sleeve to slide over the funnel periphery, thereby pulling the thrombus or embolus through the funnel and into the middle catheter lumen.

The invention discloses an improved and simplified modeling method of a rat middle cerebral artery embolism ischemia model and an auxiliary precise thrombus pushing device.According to the modeling method, standardized thrombus embolism is prepared through an in-vitro step, and the modeling method comprises the steps that blood is incubated in a PE-50 catheter at the specific temperature for the specific time to form initial thrombus; the diameter is accurately controlled to be smaller than 0.14 mm through reciprocating push-pull and negative pressure folding suction of a PE-10 catheter; then, loading the emboli by using a normalized vascular catheter with a 20mm pre-mark; during modeling, the catheter is inserted to a preset depth through an external carotid artery, and the thrombus is pushed into a target blood vessel at a constant speed of 10-20 [mu] L / min by means of an auxiliary precise thrombus pushing device. The core problems of poor thrombus quality and low model stability and repeatability of a traditional method are effectively solved by optimizing the whole process of thrombus preparation, catheter specification, pushing rate and verification standard in combination with a special device, the success rate of the model can reach 90% or above, and an efficient and reliable experimental tool is provided for cerebral apoplexy research.

To make a plug hardly come off a blood-collecting vessel holder while having a function similar to a function of a conventional top cover-type plug, or make a plug body hardly remain in a blood-collecting vessel when the plug is pulled out from the blood-collecting vessel.SOLUTION: A plug 10 for a blood-collecting vessel comprises a plug body 20 that is an elastic body for being inserted into a blood-collecting vessel 100, and a cylindrical covering part 30 that is fixed to the plug body 20 so as to cover a part of the plug body 20. The plug body 20 has an outer peripheral surface 22a which is exposed outside and which protrudes outward with respect to the covering part 30.SELECTED DRAWING: Figure 2

The invention provides a thrombus resection system with a curved tubular cutting device and a method of using the same. These systems, devices, and methods enable: (i) efficient cutting and removal of various thrombus tissue from a blood vessel, including soft tissue, tough tissue, and hard tissue; (ii) safely self-collecting and removing tissue particles to avoid embolic release; and (iii) effectively treating the blood vessel and reducing the risk of suffering from vascular injury that may lead to aggravation of stenosis.

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

Deflection devices, systems, and methods for the prevention of stroke configured and negatively charged to filter emboli in the bloodstream and prevent advancement into the artery extending from the aortic arch. Devices may be formed as a single structure or a composite device. Additionally, a retrieval system is provided, including a sleeve catheter and a retrieval device slidably disposed therein, the retrieval device including one or more attachment portions configured to engage at least a portion of a device positioned within an artery extending from the aortic arch.