58 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.

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.

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.

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 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.

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.

Disclosed herein are devices, systems, and methods useful in facilitating the removal of thrombus, embolus, or debris from a blood vessel and other intravascular interventional actions, including proximal embolic protection when treating a vascular lesion or condition.

A system for removing emboli and a method of using the same. The system comprises a blood clot extraction device and a collector, wherein the blood clot extraction device comprises a plurality of leaf-shaped extension parts; and the collector is configured to transition between a collapsed state when the collector is isolated within the outer tube and an expanded state when the collector is pushed outside the outer tube, where the blood clot extraction device can be received within the collector when the collector is in the expanded state. The system optionally includes a distal capture device.

This invention discloses a method and system for constructing an AI-assisted diagnostic agent for pulmonary embolism based on ontology and knowledge graph, belonging to the fields of medical information systems and medical artificial intelligence technology. By integrating a pulmonary embolism-specific medical ontology, a clinically aligned knowledge graph, and thought chain reasoning, this invention leverages the hard constraints of ontology knowledge to achieve interpretability analysis of the entire process of AI-assisted diagnosis for pulmonary embolism, precise suppression of AI illusions specific to pulmonary embolism, end-to-end quality control, and closed-loop optimization. It is particularly suitable for rapid diagnosis of acute and critical pulmonary embolism, AI-assisted identification of pulmonary artery filling defects in CTPA images, thrombosis severity stratification, and emergency treatment decision tracing and regulatory compliance quality control scenarios. It can be adapted to the implementation, regulatory verification, and clinical optimization of various pulmonary embolism AI imaging diagnostic and emergency auxiliary diagnosis and treatment systems, specifically addressing core illusion problems in pulmonary embolism AI diagnosis such as false positive embolus identification and disordered risk stratification.

The invention belongs to the technical field of foreign matter capturing, and discloses a capturing device for recovering foreign matter, plaque and embolus in vascular intervention, which comprises a tube body, the end part of the tube body is movably connected with a conical top cover through an adjusting assembly, and a rubber sealing sleeve is fixedly mounted on the side wall, close to the tube body, of the conical top cover in an adhesion manner; the rubber sealing sleeve is of an annular structure, a filling groove is formed in the rubber sealing sleeve, the conical top cover, the first small hole, the filling groove and the like are arranged, during use, the front end of the conical top cover extrudes and penetrates through arterial thrombosis, then clear water is injected into the connecting pipe, and the connecting pipe is sealed; water flow passes through the connecting pipe, passes through the first small hole, the second small hole and the third small hole to enter the connecting groove and then gradually enters the filling groove, the rubber sleeve gradually collides and expands to seal the front end of the thrombus, and during use, the connecting pipe is driven to rotate by rotating the pipe body, so that the first small hole and the third small hole are staggered, and the thrombus can be conveniently filled. And subsequent operation can be carried out.

The invention relates to the technical field of experimental animal cerebral ischemia model construction, in particular to a cerebral ischemia model percutaneous puncture suture introduction method and a cerebral ischemia model percutaneous puncture suture introduction device, and the method comprises the following steps: percutaneous puncture of common carotid artery by a superfine puncture needle, withdrawal of the puncture needle after feeding into a micro catheter sheath through a needle cavity, and compression hemostasis by an external pressure type micro air bag ring. The suture is pushed to the starting section of the middle cerebral artery through the micro catheter sheath to complete embolism, the suture is withdrawn during reperfusion, air bag hemostasis is carried out again, and the device comprises a superfine puncture needle, the coaxial micro catheter sheath, a suture pushing core wire and an external pressure type micro air bag ring which form a three-layer nested structure, and the superfine puncture needle, the coaxial micro catheter sheath, the suture pushing core wire and the external pressure type micro air bag ring form a three-layer nested structure. The integrity of the blood vessels and the smoothness of the blood flow are completely retained after operation.

The invention provides an intracranial embolism protection device, and belongs to the technical field of interventional therapy equipment. The device comprises a conveying guide wire, an embolus collecting part and a supporting part which are integrally connected are arranged at the far end of the conveying guide wire, the supporting part is arranged at the near end of the embolus collecting part, the embolus collecting part and the supporting part have a contraction state and an expansion state, and the supporting part in the expansion state is of a cylindrical structure automatically attached to the blood vessel wall. The support part is used for fully fitting blood vessels and guiding blood flow to flow to the embolus collection part along the support part; the technical problems that in the prior art, a far-end protection umbrella is poor in wall attaching effect, consequently, the interception effect is poor, and the contact area between the near-end opening position of the protection umbrella and the blood vessel wall is small, and blood vessels are damaged easily are mainly solved.

This disclosure provides devices and methods for engaging, capturing, and removing emboli. Specifically, one aspect of this disclosure provides a device with a visual design to allow clinicians to assess the delivery, deployment, and emboli capture process of the device. The device is configured to allow clinicians to easily identify various viewpoints after the device is placed within a neurovascular structure. The device is also configured to allow clinicians to accurately assess its deployment and emboli capture status. Certain embodiments of this disclosure also provide devices and methods of use for percutaneously removing blood clots with minimal risk.

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.