22 results about "Distal embolization" patented technology

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).

A protective umbrella and intracavity umbrella ribs are coaxially arranged on a conveying guide wire of the far-end embolism protection device, a supporting bracket of the protective umbrella is of a hollow structure, two first openings are formed in the near end of the supporting bracket and are symmetrically arranged along the central axis of the supporting bracket, and a covering film is fixed to the far end of the supporting bracket and wraps a part of the far end of the supporting bracket; a plurality of holes are formed in the covering film, the intracavitary umbrella ribs are located in the supporting support and are of a hollow structure, and second openings of the intracavitary umbrella ribs face the far end of the supporting support. The intracavity umbrella ribs and the covering film form a double-layer filtering structure, so that the situation that thrombus clots are accumulated in the inner cavity of the protection umbrella is effectively improved, the probability that meshes / micropores of the protection umbrella are blocked is reduced, and sufficient blood supply of a nervous system is ensured; the intracavitary umbrella ribs and the supporting bracket are coaxially arranged, so that the stability of the protective umbrella in the blood vessel is improved, the protective umbrella is not prone to inclination, and effective capture of free thrombus is ensured; the arrangement of the two first openings ensures that an effective capture channel can be provided even in an inclined condition.

The invention provides a thrombus removal catheter for intracavity treatment, and belongs to the technical field of medical instruments. Comprising a first guide rod and a cutter body, a guide wire is inserted into the first guide rod, the outer wall of the first guide rod is slidably sleeved with a first isolation sleeve, the outer wall of the first isolation sleeve is slidably sleeved with a second guide rod, and the supporting assembly is used for supporting blood vessels of a patient. By arranging the supporting assembly, thrombus which is separated or falls off from the inner wall of a blood vessel can be blocked and protected, the thrombus is prevented from flowing to the far-end blood vessel along with blood, and the phenomenon of far-end embolism is avoided; the supporting assembly can collect thrombus separated in the cutting process or falling off from the inner wall of a blood vessel in a unified mode, the collected thrombus is discharged out of the body of a patient, the phenomenon of far-end embolism is avoided, and it is guaranteed that the thrombus is not left in the whole thrombus removing process.

The application discloses a peripheral blood vessel intervention thrombus-removing catheter with a distal embolism protection structure and relates to the technical field of blood vessel thrombus-removing catheters.The peripheral blood vessel intervention thrombus-removing catheter with the distal embolism protection structure comprises a catheter body, one end of the catheter body is provided with a thrombus-removing assembly, the surface of the catheter body is provided with a thrombus-removing assembly, the inside of the catheter body is provided with a transmission assembly, the thrombus-removing assembly comprises a protection pipe network fixedly installed on one side of the catheter body.The transmission assembly is arranged, in the process of use, the rotation of a lead screw can drive one end of the lead screw to move the one side of the filter screen plate to the inside of the protection pipe network, so that the protection pipe network is expanded, and the air bag piece can be inflated, the catheter is placed into in the process of use, the preparation time of catheter operation is reduced, the catheter is convenient to operate, the thrombus-removing and protection operation of the catheter are improved, and the use convenience of the catheter is improved.

The invention discloses a resection device, and relates to the technical field of medical instruments. The excision device comprises a catheter, a cutting assembly and a recycling assembly, the cutting assembly and the recycling assembly are arranged at the far end of the catheter, the recycling assembly comprises a suction part and a flushing part, the suction part is at least partially connected to the far end of the catheter and provided with at least one suction opening used for adsorbing a target object, and the flushing part is connected to the far end of the suction part and provided with at least one suction opening used for adsorbing the target object. And at least one spraying opening for spraying flushing fluid is formed. The excision device is provided with the recycling assembly, flushing fluid is sprayed through the flushing part of the recycling assembly to conduct thrombolysis, meanwhile, thrombus is recycled through the suction part, the risk that the thrombus falls off and blocks a far-end blood vessel is reduced, and therefore the possibility of occurrence of far-end embolism complications is reduced; and the resection device can be used for resection of plaques with mixed lesions.

The present invention discloses a mechanical thrombus removal device and method, including a collection tank, a thrombus removal catheter, a thrombus cutting assembly and a guide wire. The interior of the collection tank is in a negative pressure state and is connected to the thrombus removal catheter, that is, the interior of the thrombus removal catheter is in a negative pressure state; the thrombus cutting assembly includes an inner blade, an outer blade, a flexible transmission shaft and a power assembly that drives the flexible transmission shaft to rotate, the outer blade is slidably installed on the head of the thrombus removal catheter, and the flexible transmission shaft drives the inner blade to rotate; the power assembly is provided with a pusher that can drive the inner blade and the outer blade to extend from the head of the thrombus removal catheter; the thrombus removal catheter is provided with a first cavity in the middle, and the outer wall is provided with a second cavity for accommodating the guide wire. The present invention adopts the cutting concept of negative pressure suction and mechanical cutting, which can improve the efficiency of thrombus removal, perform in situ excision of thrombi, and avoid distal embolism caused by thrombus fragments that fall off during the process of dragging the thrombus during negative pressure suction alone.

The invention discloses a peripheral vascular intervention thrombectomy catheter with a far-end embolism protection structure, and relates to the technical field of vascular thrombectomy catheters. The peripheral vessel interventional thrombectomy catheter with the far-end embolism protection structure comprises a catheter body, an embolism protection assembly is arranged at one end of the catheter body, a thrombectomy assembly is arranged on the surface of the catheter body, a transmission assembly is arranged in the catheter body, and the embolism protection assembly comprises a protection pipe network fixedly installed on one side of the catheter body. Through the transmission assembly, one end of a lead screw can drive one side of a filter screen plate to move towards the interior of the protective pipe network through rotation of the lead screw in the use process, so that the protective pipe network is expanded, meanwhile, an air bag piece can be inflated, and after a guide pipe is placed in the use process, the air bag piece can be inserted into the protective pipe network. The preparation time of catheter operation is shortened, the catheter is convenient to operate, thrombectomy and protection operations of the catheter are improved, and the use convenience of the catheter is improved.

A distal embolization protection device, which is used for preventing distal vascular embolization. The distal embolization protection device comprises: a filter screen (2), the body of the filter screen (2) consisting of hollow tubes (21), which are distributed in cross and inner cavities of which are in communication with each other, and the filter screen (2) being configured to filter out thrombi; and a pushing rod (3), which has a cavity section (31), wherein the cavity section (31) has a fluid conveying channel (311), the fluid conveying channel (311) being in communication with the inner cavities of the hollow tubes (21) and being configured to convey a fluid to the inner cavities of the hollow tubes (21), so that the filter screen (2) is converted from a folded state into an unfolded state under the pressure of the fluid. In the distal embolization protection device, the filter screen can be opened by means of filling the hollow tubes with a fluid, and can fit onto a vascular lumen by means of controlling the magnitude of a fluid filling pressure, thereby helping to improve the plaque capturing efficiency and lowering the plaque escape risk.

The invention discloses a thrombus removal system. The thrombus removing system comprises an intervention catheter, a micro rotating assembly, a negative pressure suction unit and an intelligent monitoring module. The interventional catheter adopts a coaxial three-channel design, the inner layer is a rotating assembly driving shaft channel, the middle layer is a negative pressure suction channel, and the outer layer is a reagent channel; the micro rotating assembly is integrated in the rotating assembly driving shaft channel; the negative pressure suction unit is communicated with the negative pressure suction channel; the intelligent monitoring module comprises a sensor and a controller, and the sensor is arranged at the head end of the catheter and used for real-time monitoring; the controller is used for controlling all the assemblies according to sensor information. According to the thrombus removing system, a thrombus fibrin network is densified and reconstructed by applying shear stress of 50-120 dyn / cm < 2 >, trapped red blood cells are released, the thrombus volume is reduced, and thrombus is rapidly, efficiently and completely removed; working parameters can be adjusted, the risk of far-end embolism caused by thrombus fragmentation is reduced, and the success rate of vascular recanalization and the treatment safety are improved.

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).

The endovascular catheter comprises a guide wire inner cavity, a filling inner cavity and an outer sheath tube from inside to outside, the far end of the filling inner cavity is communicated with a telescopic balloon, the far end of the outer sheath tube is connected with an integrated cutting and recycling net used for wrapping the outer surface of the balloon, and the outer surface of the balloon is provided with a plurality of grooves. The integrated cutting and recycling net is composed of a sparse net section used for cutting and a dense net section used for recycling. The device has the advantages that fine and gridding fragmentation of plaques can be achieved, large sharp fragments are prevented from being generated, meanwhile, the generated fragments can be captured in time and safely taken out of the body, the risk of far-end embolism is fundamentally reduced, and the operation efficiency is improved.

The utility model relates to an aneurysm embolism device which comprises a far-end embolism ring and a near-end spiral net connected with the far-end embolism ring. After being released into the aneurysm, the far-end embolism ring deforms into a polyhedral three-dimensional structure capable of being supported on the inner wall of the aneurysm, and the near-end spiral net deforms into a spiral shape with the diameter gradually reduced from the far end to the near end. According to the utility model, the embolism density can be increased, the rupture opening of the rupture aneurysm can be quickly and effectively blocked, the postoperative recurrence and rupture risk is reduced, the use amount is reduced, the medical cost is reduced, and the operation safety is improved.

The present invention discloses an intraluminal opening device for vascular occlusive lesions, comprising an inner catheter and an outer catheter, wherein a grinding device is inserted into the inner catheter, and an operating device connected to the grinding device and suitable for controlling the action of the grinding device is provided at the proximal end of the inner catheter; the outer catheter comprises a grinding cavity, a balloon cavity and a suction cavity, wherein the inner catheter is inserted into the grinding cavity and extends out of the distal end of the grinding cavity; the distal end of the outer catheter is provided with a suction port connected to the suction cavity, and the rear part of the suction port is provided with a balloon connected to the balloon cavity; the proximal end of the outer catheter is provided with a pressure valve interface connected to the balloon cavity and a suction interface connected to the suction cavity, and the suction interface is connected to the suction device through a catheter. The present invention can efficiently remove calcified plaques or thrombi that cause lumen occlusion in blood vessels, and can effectively prevent plaque or thrombus fragments from flowing to the distal end with blood, thereby avoiding distal embolism.

The application discloses a kind of guiding devices of super slippery guide wire, it is related to medical instrument technical field, including plastic catheter, metal guide wire is arranged in plastic catheter inside, still include displacement auxiliary mechanism being set to plastic catheter, displacement auxiliary mechanism includes small knob being slidably connected to the outer surface of metal guide wire by piston, small knob is hollowly arranged, and inner gear ring is fixedly connected to small knob bottom end inner wall;Through the setting of small knob, inner gear ring, planetary gear, positioning piece and clamping piece, medical staff can accurately control the moving distance of metal guide wire when controlling metal guide wire to move in patient's blood vessel, accurately control guide wire moving distance can prevent guide wire from being excessively inserted to cause complications such as blood vessel perforation, laminated or aneurysm rupture, in addition, the friction of metal guide wire head end and blood vessel wall can cause plaque fragment to fall off, and accurate control moving distance can reduce mechanical stimulation to pathological site, reduce distal embolization risk.

This invention belongs to the field of medical device technology, specifically a carotid artery bypass catheter with a distal embolization protector. Addressing the problems of high risk of cerebral infarction due to plaque detachment during existing carotid endarterectomy procedures, as well as the cumbersome nature of current composite surgical procedures and reliance on specialized operating room conditions, this invention proposes the following solution: It includes a bypass catheter body and a distal embolization protection mechanism, connected together; it also includes a proximal end and a distal end. By integrating blood bypass and distal embolization protection functions into one unit, this invention allows surgeons to perform the procedure independently in a regular operating room without relying on a composite operating room. While establishing intraoperative blood bypass, it effectively intercepts potentially detached plaques or thrombi, significantly reducing the risk of postoperative acute cerebral infarction, decreasing disability and mortality rates, and simplifying the surgical procedure while shortening anesthesia and surgical time.

The invention discloses a thrombus removing device, a tool bit and a preparation method of the tool bit, and relates to the technical field of medical instruments. The tool bit comprises a tool bit base body, a wear-resistant coating and an anti-adhesion coating. The tool bit base body is provided with a contact part making contact with a target cutting object and an easy-to-adhere part where fragments generated by cutting flow through. The wear-resistant coating is coated on the contact part of the tool bit base body to form a wear-resistant area; the anti-adhesion coating is coated on the easy-adhesion part of the tool bit base body so as to form an anti-adhesion area. The structure of the scalpel head is improved, the scalpel head is subjected to function division, the wear-resistant coating is arranged on the wear-resistant area, and the anti-adhesion coating is arranged on the anti-adhesion area, so that the scalpel head has the super-hard wear-resistant characteristic and excellent anti-thrombus adhesion, the overall service life of the scalpel head is prolonged, the operation efficiency is improved, and the operation safety is improved; and serious complications such as far-end embolism caused by falling of thrombus fragments can be effectively avoided.

The invention discloses a cerebrovascular embolism interventional thrombectomy device, and relates to the technical field of medical instruments. The vascular embolism interventional thrombectomy device comprises a container catheter, a pushing assembly is movably connected to the interior of the container catheter, and a containing assembly is fixedly connected to the inner wall of the container catheter; the pushing assembly comprises a position control pipe, the position control pipe is arranged in the container guide pipe, and the twitching pipe is arranged in the position control pipe; the pushing air bag is movably connected to the right side of the container guide pipe. According to the vascular embolism interventional thrombus extraction device, the pushing air bag is driven to one side of a thrombus, certain gas is injected into the pushing air bag, so that the pushing air bag is expanded, and the pushing air bag is extruded to be expanded by pulling the twitching tube; the whole thrombus can be taken out from the container catheter under the condition that too large supporting force is prevented from being generated on the inner wall of the blood vessel, and then secondary far-end embolism caused by thrombus tearing is avoided.

This invention discloses a resection device, relating to the field of medical devices, comprising a handle and a cutting assembly connected to the handle for resection of intravascular emboli. The cutting assembly includes a torque shaft and a cutting element disposed distal to the torque shaft. The handle contains a drive mechanism and a transmission mechanism connecting the drive mechanism and the torque shaft. The drive mechanism drives the torque shaft to rotate via the transmission mechanism, and the transmission mechanism is adjustable in the direction of rotation of the torque shaft. This resection device can change the overall rotation direction of the torque shaft, enabling timely clearing of blockages in the cutting assembly and preventing distal embolism caused by plaque or thrombus buildup due to failure to drain from the blood vessel in time.

The present invention discloses a distal embolic protection device, comprising a protective umbrella and an intracavitary rib coaxially disposed on a delivery guidewire. The protective umbrella's support frame is a hollow structure with two first openings at its proximal end, the two first openings being symmetrically arranged along the central axis of the support frame. A membrane is fixed to the distal end of the support frame and partially wraps around it. The membrane is provided with a plurality of holes. The intracavitary rib is located within the support frame and is a hollow structure, with a second opening facing the distal end of the support frame. The present invention utilizes the intracavitary rib and the membrane to form a double-layer filtering structure, thereby effectively improving the accumulation of thrombus clots within the protective umbrella's lumen, reducing the probability of clogging of the protective umbrella's mesh / micropores, and ensuring adequate blood supply to the nervous system. The coaxial arrangement of the intracavitary rib and the support frame improves the stability of the protective umbrella within the blood vessel, making it less likely to tilt and ensuring effective capture of free thrombi. The provision of the two first openings ensures that an effective capture channel is provided even under tilted conditions.

The utility model belongs to the technical field of medical instruments, and discloses a guiding device. The guiding device comprises a pushing assembly and a hypotube, the pushing assembly comprises a screw-in handle and a driving shaft arranged at the end of the screw-in handle, the pushing assembly is provided with a pushing cavity, and the pushing cavity penetrates through the screw-in handle and the driving shaft; the hypotube is arranged at the end, away from the screw-in handle, of the driving shaft, a screw-in tool bit is formed at the end, away from the driving shaft, of the hypotube, the screw-in tool bit comprises a plurality of arc-shaped tool bit parts which are evenly arranged in the circumferential direction of the end face of the hypotube, arc openings of the arc-shaped tool bit parts face the inner side, guiding parts are arranged on the inner side faces of the arc-shaped tool bit parts, and the pushing cavity and the hypotube are communicated to form a wire guiding cavity. According to the guide device provided by the utility model, during tunneling, when the screw-in tool bit passes through a lesion, generated broken plugs can be wrapped and clamped into a pipe cavity along the guide part, and the broken plugs are prevented from escaping to the far end to cause far-end embolism.

The invention relates to an aspiration catheter and a thrombus aspiration system. The suction catheter includes: an outer tube; the inner tube is arranged in an inner cavity of the outer tube, a support is arranged on the inner tube, the inner tube can move relative to the outer tube in the axial direction of the outer tube so as to release the support out of the outer tube from the far end of the outer tube and retract into the outer tube, and the support is configured to be capable of expanding in the radial direction after being released out of the outer tube. The support comprises a supporting body and a film layer covering at least one side surface of the supporting body. According to the scheme, thrombus escape can be prevented, and the risk of far-end embolism is reduced.

The invention belongs to the technical field of medical instruments, and particularly relates to an intravascular device for treating peripheral artery occlusion and a using method.The intravascular device comprises a conveying pipe, a cutting part and a positioning part, the cutting part and the positioning part are arranged in one end of the conveying pipe, one end of the cutting part can stretch out of the conveying pipe, and the cutting part rotates with the central axis as the center for cutting; the positioning part is arranged between the cutting part and the inner wall of the conveying pipe, one end of the positioning part can extend out of the conveying pipe, and an inner coating and an outer coating which are overlapped are arranged on the outer wall of the end, extending out of the conveying pipe, of the positioning part; the defects in the prior art are overcome, the operation difficulty of the arterial occlusion lesion can be reduced, the clinical requirements for repairing the vascular endothelium, preventing restenosis and reducing thrombosis after the arterial occlusion lesion is opened are integrally met, and complications such as flow-limiting dissection and far-end embolism caused by a medicine-carrying balloon or a support can be avoided.