12 results about "Distal protection" patented technology

The application provides a thrombus taking system, and relates to the technical field of medical devices.The thrombus taking system comprises a thrombus taking device and a distal protection device.The thrombus taking device comprises a thrombus taking module and a guide extending along the length direction of a blood vessel.The thrombus taking module comprises a thrombus taking stent and a first connecting ring.The thrombus taking stent is sleeved on the guide.The thrombus taking stent comprises a stent catching net and a stent collecting end connected in a head-to-tail mode.The stent collecting end is fixedly connected with the first connecting ring, and the first connecting ring is sleeved on the guide.The distal protection device comprises a device framework, a braided wire and a third connecting ring.The device framework is sleeved on the guide.The device framework is wound with the braided wire.The braided wire is gathered on the third connecting ring.The third connecting ring is sleeved on the guide, and the opening of the distal protection device is opposite to the opening of the thrombus taking stent.The system realizes structure improvement through the split design of the thrombus taking device and the distal protection device, improves the working flexibility, and provides convenience for thrombus taking operation.

The utility model discloses a medicine balloon far-end protective sleeve assembly, and belongs to the field of medical instruments. Comprising an inner protective sleeve and an outer protective sleeve, an installation cavity used for installing the far end of a medicine balloon is formed in the inner protective sleeve, an easy-to-tear part is arranged on the inner protective sleeve, and the inner protective sleeve is sleeved with the outer protective sleeve. According to the utility model, the inner protective sleeve and the outer protective sleeve are arranged, the inner protective sleeve is used for sleeving the drug balloon, and the far end of the drug balloon is positioned in the mounting cavity, so that a first protection effect is achieved; the inner protective sleeve is sleeved with the outer protective sleeve, so that the inner protective sleeve is in close fit with the folded medicine balloon, the effects of limiting and resisting deformation of the folded medicine balloon are achieved, the second protection effect is achieved, and the protection effect can be improved through double protection; medicine loss caused by tight fit friction force when an operator takes down the protective sleeve can be reduced, and the shape of the folded medicine balloon can be kept.

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.

This application relates to the field of medical device technology, specifically to a distal protection device, including a filter and a support stent. The proximal end of the support stent has an opening, and the support stent includes a column segment. The distal end of the column segment is connected to the proximal opening of the filter. The radial dimension of the support stent is adjustable and has an expanded state and a contracted state. In the expanded state, the radial dimension of the column segment is not less than the radial dimension of the proximal opening of the filter. In this distal protection device, the support stent is connected to the proximal opening of the filter. In the expanded state, the radial dimension of the column segment is not less than the radial dimension of the proximal opening of the filter. The column segment adheres to the inner wall of the blood vessel. Compared to related technologies that rely solely on a support ring to provide radial force, the column segment can provide greater radial support force, significantly improving the adhesion performance between the filter and the inner wall of the blood vessel, reducing the risk of thrombus escape from between the proximal opening of the filter and the inner wall of the blood vessel. This makes the distal protection device suitable for the treatment of vascular lesions with severe plaque and calcification.

The invention belongs to the technical field of medicine, and discloses a thoracic aorta in-situ fenestration and whole-course brain protection integrated device and method. According to the method, a bundling balloon is formed by a plurality of small balloons, the different small balloons are controlled to be inflated or shrunk under pressure relief, and the angle of a puncture needle is adjusted through the bundling balloon catheter. And the far-end protection umbrella covers the cluster balloon catheter and is used for preventing thrombus from escaping to the far end. According to the invention, the bundling balloon composed of a plurality of small balloons is designed, and the angle of the puncture needle is adjusted by controlling the different small balloons to expand by filling or shrink by releasing pressure, so that the time for an instrument to enter a membrane rupture window is greatly shortened, and the positioning accuracy of a membrane rupture point of the covered stent is improved; meanwhile, a far-end protective umbrella is arranged to prevent thrombus and other foreign matters from escaping to the far end.

A delivery system for deploying a medical implant includes an elongated delivery wire assembly slidably disposed within a delivery catheter lumen, the delivery wire assembly having an implant loading region configured to place an implant when the delivery wire assembly is confined within the delivery catheter lumen and the implant is in a compressed delivery configuration. The delivery wire assembly also includes a distal end protection feature of the implant having a central portion connected distal to the delivery wire assembly at the implant loading region and a peripheral portion extending proximally from the central portion. When the delivery wire assembly, the implant, and the distal end protection feature are confined within the delivery catheter lumen, the peripheral portion at least partially covers the distal end portion of the implant, wherein the peripheral portion remains proximally extending when the implant is in an expanded configuration after being released from the delivery catheter lumen.

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 utility model provides a thrombus suction separator and a thrombus suction device, and relates to the technical field of medical instruments. The thrombus aspiration separator comprises a core wire which is arranged in the thrombus aspiration catheter in a penetrating mode, the near end of the core wire is an operation end, and the far end of the core wire is a leading-in end. The developing wrapping part correspondingly wraps the far end of the core wire; the protective sleeve correspondingly sleeves the far end of the core wire and is positioned on one side of the near end of the developing coating piece; the separation ball head is correspondingly arranged at the joint of the protective sleeve and the developing coating piece in a sleeving manner; the periphery of the inner side of the separation ball head is of a cavity structure, cutting nets are correspondingly arranged on the periphery of the inner side of the separation ball head, and conical cutting parts are correspondingly arranged on the two sides of the separation ball head. According to the thrombus suction device, large thrombus can be smoothly cut and broken, suction is facilitated, thrombus blocked in blood vessels can be effectively cleaned, and the thrombus suction device is simple and ingenious in overall design, flexible and convenient to use and high in practicability.

This application relates to an implant delivery assembly with a distal protection feature. A delivery system for deploying a medical implant includes an elongated delivery wire assembly slidably disposed within the lumen of a delivery catheter. The delivery wire assembly has an implant loading region configured to place an implant when the delivery wire assembly is confined within the lumen of the delivery catheter and the implant is in a compressed delivery configuration. The delivery wire assembly also includes a distal end protection feature for the implant, having a central portion distally connected to the delivery wire assembly at the implant loading region and a peripheral portion extending proximally from the central portion. When the delivery wire assembly, the implant, and the distal end protection feature are confined within the lumen of the delivery catheter, the peripheral portion at least partially covers the distal end portion of the implant. When the implant is released from the lumen of the delivery catheter and is in an expanded configuration, the peripheral portion remains extending proximally.

The utility model relates to a blood vessel plaque rotary cutting system which comprises a rotary cutting guide wire, the rotary cutting guide wire comprises a guide wire body capable of rotating around the axis of the guide wire body, a rotary cutting component used for cutting away plaques, a protection component used for collecting the rotary cutting plaques and a limiting component, and the rotary cutting component, the protection component and the limiting component are arranged on the guide wire body. The protection component is located at the far end of the rotary cutting component and can move in the axial direction of the guide wire body, the limiting component comprises a far-end limiting component and a near-end limiting component which are used for limiting displacement of the protection component, and the near-end limiting component is the rotary cutting component. The protective component is movably arranged on the guide wire body, the guide wire body can drive the rotary cutting component to move axially and rotate circumferentially at the same time, different diseased regions can be polished, the axial moving distance is longer, the rotary cutting area is wider, and the treatment effect is better; and meanwhile, the rotary cutting part is used for limiting the protection part, so that the structure of the rotary cutting guide wire is more simplified.

The invention belongs to the technical field of medical instruments, and discloses a far-end protector and a thrombectomy system. The far-end protector comprises a skeleton. The skeleton can be stretched and expanded or compressed and tightened in the radial direction, the skeleton comprises a first main body, a second main body, a third main body and a fourth main body, the first main body is in an opening shape so that thrombus can enter the skeleton, and the second main body and the third main body are elastic so as to be attached to the inner wall of a blood vessel; the axial length of the second main body is kept unchanged, the axial length of the third main body can change along with the bending amplitude of the blood vessel, and the fourth main body is covered with a barrier film for thrombus retention and blood can penetrate through the barrier film. Therefore, when the far-end protector is used, in a blood vessel with large curvature, the skeleton can be well attached to the inner wall of the blood vessel, so that the skeleton can be stably fixed in the blood vessel, fallen thrombus can be effectively collected, the possibility that thrombus forms embolism is reduced, and the possibility that cerebral apoplexy occurs after an operation is effectively reduced.

The invention provides a double-cavity thrombus aspiration catheter assembly, and belongs to the technical field of interventional medical instruments. The assembly comprises a suction tube body, the suction tube body is provided with a suction cavity and a guide cavity which are arranged in parallel in the axial direction, the near end of the suction cavity is used for being connected with a negative pressure suction device, and the far end is provided with a suction opening; a far-end protection unit is slidably arranged in the guide cavity in a penetrating mode, the far-end protection unit is provided with a guide part and an interception part located at the far end of the guide part, and the interception part has a compressed state and an expanded state; during working, the far-end protection unit in a compressed state is conveyed to the far end of a target position along with the suction tube body, the intercepting part of the far-end protection unit is expanded and supported at a set position after being separated from the guide cavity so as to intercept thrombus falling in the operation process, and the suction cavity of the suction tube body can move along the guide part so as to adjust the position of the suction opening; the technical problems that in the prior art, a guide wire channel needs to be repeatedly established when the position of a suction catheter is adjusted, far-end protection needs additional instruments, operation time is long, and risks are large are mainly solved.