17results about How to "Improve radial support" patented technology

The invention relates to the technical field of medical instruments, and particularly discloses an intravascular stent. The stent is tubular and comprises a plurality of supporting rings and a plurality of connecting rods, the supporting rings are arranged at intervals in the axial direction of the intravascular stent, and every two adjacent supporting rings are connected through the corresponding connecting rod; the intravascular stent comprises a middle area and two end areas which are arranged in the axial direction, the two end areas are located at the two axial ends of the intravascular stent respectively, the middle area is located between the two end areas, the portion, located in the middle area, of the supporting ring comprises a plurality of first supporting rods connected in the circumferential direction, and the portion, located in the end areas, of the supporting ring comprises a plurality of second supporting rods connected in the circumferential direction. The width of the first supporting rod is larger than that of the second supporting rod. According to the stent, the widths of the supporting rings of all parts are limited, so that the good flexibility of the two ends of the stent is guaranteed before the stent is expanded, the supporting force of the middle is high, and the passing ability of the stent is improved; the stent is axially retracted after being expanded and is uniform in shape, so that the bone effect of a dog is reduced.

The invention belongs to the technical field of intravascular stents, and particularly discloses a degradable peripheral artery stent, the cross section of the degradable peripheral artery stent is of an annular structure, the degradable peripheral artery stent is applied to the peripheral artery of the human body and comprises a plurality of supporting units and connecting units in the axial direction of the stent, the connecting units are located between the supporting units, and the adjacent supporting units are connected through the connecting units; the supporting unit comprises an end supporting unit and a middle supporting unit, and the end supporting unit and the middle supporting unit are each of a closed-loop structure formed by intersecting a sine-like curve and a reverse sine-like curve. The stent is integrally formed through a 3D printing technology, and is high in structural stability and good in flexibility. According to the degradable peripheral artery stent of the structure, degradable polylactic acid is adopted as a stent material, inflammatory reaction caused by the fact that the stent exists in blood vessels for a long time is greatly avoided, and the stent has good flexibility and adherence performance under the condition that the stent has enough radial supporting force; and the risk of restenosis after the stent operation is reduced.

The device comprises an umbrella-shaped elastic net disc, a pushing rod, a releasing section and a micro catheter, the umbrella-shaped elastic net disc is of a double-layer structure woven by metal wires, points at the maximum diameter of a disc opening of the umbrella-shaped elastic net disc are located on the same plane, and anchoring devices are distributed around the two sides of the skirt edge of the umbrella-shaped elastic net disc; the umbrella-shaped elastic net disc is used for strengthening fixation of the umbrella-shaped elastic net disc and a tumor wall, so that the umbrella-shaped elastic net disc can be better attached to the inner wall of a tumor cavity and is not prone to displacement in the tumor cavity, the umbrella-shaped elastic net disc is provided with a blocking area, the middle position of the blocking area right faces an aneurysm neck opening, and a coating for promoting growth of vascular endothelial cells is arranged in the middle position of the blocking area of the umbrella-shaped elastic net disc. The coating can accelerate endothelialization of the neck of the aneurysm, so that reconstruction of the aneurysm-carrying artery is also realized, and the risk of recurrence and recanalization of the aneurysm is reduced.

The present invention relates to the technical field of medical devices, and specifically to a self-expanding drug-coated vascular stent, which is a mesh tube structure formed by connecting a plurality of main ribs and a plurality of connecting ribs, wherein the plurality of main ribs are evenly distributed along the circumference, and two adjacent main ribs are connected by connecting ribs; when the mesh tube structure is in an expanded state, the main ribs extend in a sinusoidal waveform, the connecting ribs extend in the same direction as the main ribs, the connecting ribs are connected to the side of the main ribs where the crest or trough is protruding, one side of the same connecting rib is connected to the crest of a main rib, and the other side of the connecting rib is connected to the trough of another adjacent main rib; when the mesh tube structure is in an unfolded and flattened state, the plurality of main ribs are parallel to each other, and the connecting ribs extend in a fishbone shape along the extension direction of the main ribs. Different branch ribs of the connecting ribs exert force on the main ribs, so that the axial flexibility of the vascular stent is better, and the instantaneous non-uniform expansion phenomenon of the vascular stent during the expansion process can be effectively alleviated, and the wall adhesion of the stent after implantation can be ensured.

The utility model provides an intravascular thrombus aspiration catheter. The intravascular thrombus aspiration catheter comprises an internal flow channel, a far-end aspiration catheter section, a middle catheter section and a near-end driving catheter section, and the internal flow channel is sequentially communicated with the far-end aspiration catheter section, the middle catheter section and the near-end driving catheter section from the far end of the intravascular thrombus aspiration catheter to the near end of the intravascular thrombus aspiration catheter. Wherein the intravascular thrombus aspiration catheter further comprises an aspiration inlet and an outflow window, and the internal flow channel is communicated with the aspiration inlet and the outflow window; a filter screen is arranged in an inner flow channel of the middle guide pipe section and is positioned between the suction inlet and the outflow window; at least one of the far-end suction catheter section, the middle catheter section and the near-end driving catheter section is detachably connected, and the suction inlet is formed in the far-end suction catheter section. According to the intravascular thrombus aspiration catheter provided by the invention, due to the segmented detachable design, the use convenience is facilitated.

The utility model provides a novel composite stranded conductor for a cable, the novel composite stranded conductor comprises a conductor main body and one or more reinforcing layers coating the periphery of the conductor main body, each reinforcing layer is composed of a plurality of reinforcing units arranged around the axis of the conductor main body at intervals and connecting units arranged between the adjacent reinforcing units, and the number N of the reinforcing layers satisfies 1 < = N < 5. By arranging the multiple reinforcing layers on the periphery of the conductor main body and matching the reinforcing units with the connecting units, thermal stress generated in the operation process of the conductor is effectively dispersed, deformation of the conductor due to high temperature is avoided, the risk that the insulating layer is damaged due to thermal expansion is remarkably reduced, and the long-term use performance and safety of the conductor are improved. In addition, the multi-layer structure of the reinforcing layer enhances the radial supporting force of the conductor in the stranding process, the problem that the resistance is increased due to the fact that the conductor is pressed and hardened is solved, and the service life of the conductor is prolonged. The device has the advantages of simple structure, reasonable design, simple preparation process, no need of additional complex equipment and convenience in popularization and implementation.

The utility model discloses a kind of bendable assembly, insertion part and endoscope, it is related to medical instrument technical field.The bendable assembly of the utility model, including multiple sequentially connected snake bone joints, still be equipped with positioning groove on bendable assembly, positioning groove is used to install traction rope, two adjacent positioning grooves are spaced apart, and sleeve pipe is arranged outside traction rope, the distal end of sleeve pipe is fixedly connected with carrier, the first positioning groove located in proximal end is located in the distal end of sleeve pipe fixed point, the first positioning groove located in proximal end is adjacently arranged with carrier, or the number of components between the first positioning groove located in proximal end and carrier is less than or equal to preset number, or the first positioning groove located in proximal end is located on carrier.The utility model can improve the radial support force of traction rope at the distal end of sleeve pipe by the first positioning groove of proximal end, so that when snake bone assembly bends, traction rope is not easy to abut with the distal end face of sleeve pipe, so as to relieve the problem that traction rope is abraded by the distal end face of sleeve pipe.

The invention provides a novel dense net bracket and a use mode. The novel dense net bracket comprises an outer bracket and an inner bracket, the outer support is provided with a first dense net area, and first transition areas are woven at the two ends of the first dense net area in sequence. The inner support is provided with a second dense net area, second transition areas are woven at the two ends of the second dense net area in sequence, second end areas are woven at one ends of the second transition areas in sequence, and plugging blocks are distributed on one side of the inner support at equal intervals and integrally formed. The blocking block of the inner stent is arranged to block the local first dense net area of the outer stent, so that the blocking part is in contact with the crevasse, the primary crevasse impacted by high-pressure blood flow can be immediately blocked after installation, magnesium alloy is used as a stent base, and the radial supporting force is enhanced; the first end area is arranged to be matched with the second end area to achieve the anchoring effect and prevent dislocation of the support, the arc-shaped part is arranged to enhance the initial anchoring effect, and the protruding part and the arc-shaped part are clamped to prevent the inner support from being dislocated and disengaged from the outer support.

The invention relates to a double-layer stent which comprises a knitting main body, the knitting main body is of a hollow cylinder structure formed by interweaving knitting units arranged in the first knitting direction and knitting units arranged in the second knitting direction, and the knitting main body is of a double-layer structure and comprises a knitting outer layer and a knitting inner layer; each layer is formed by interweaving weaving units in two weaving directions, and at least one weaving unit of the weaving outer layer and at least one weaving unit of the adjacent weaving outer layer form a connecting thread, so that the potential stent layering risk of the double-layer weaving stent is reduced while high radial supporting force, high metal coverage rate, low shortening rate and blood flow guiding capability are ensured, and the stability of the double-layer weaving stent is improved. Knitting units are rotationally interwoven at the local connecting wire strands of the stent, the original wire pressing structure is changed, the deformation resisting capacity near interlayer connecting points is improved, the weaving units which are near the interlayer connecting points and generate displacement due to friction force can be driven to rapidly return to the original positions, and the risk of local layering of the stent is resisted.

The invention belongs to the technical field of intravascular stents, and particularly discloses a closed-loop spiral structure lower limb artery stent, the cross section of the closed-loop spiral structure lower limb artery stent is of an annular structure, the closed-loop spiral structure lower limb artery stent is applied to human body lower limb artery blood vessels, the closed-loop spiral structure lower limb artery stent comprises a plurality of supporting units parallel in the axial direction and connecting units located between the supporting units, and the adjacent supporting units are connected through the connecting units; the supporting units comprise end supporting units and a middle supporting unit, the end supporting units are located at the two ends of the lower limb artery stent, and the middle supporting unit is located between the end supporting units at the two ends of the lower limb artery stent. The lower limb artery stent body is made of a medical magnesium alloy pipe through laser cutting at a time, and the integrity and safety of the structure are improved. According to the lower limb artery stent of the closed-loop spiral structure, the radial supporting performance, the flexibility and the wall attaching performance of the stent are effectively improved, meanwhile, magnesium alloy serves as an intravascular stent material, and the problem that the stent exists in a blood vessel for a long time, and consequently inflammatory response is caused is greatly solved.

The invention provides a nerve intervention anchoring guide wire, and relates to the technical field of medical instruments, the nerve intervention anchoring guide wire comprises a main guide wire, the main guide wire comprises a core wire, the far end of the core wire is sequentially connected with a first supporting ball and a second supporting ball in the axial direction, and when the first supporting ball and the second supporting ball are in an expansion state, the expansion size can be adjusted. The first supporting ball and the second supporting ball are controlled through a pull wire, and the pull wire penetrates through the core wire and extends to the near end of the core wire. The radial supporting force of the anchoring guide wire in a blood vessel is improved by increasing the number of the supporting balls, so that a more stable fixing effect is provided, the supporting force of the first supporting ball and the supporting force of the second supporting ball can be adjusted by arranging the first pull wire and the second pull wire, secondary expansion of the first supporting ball and the second supporting ball can be achieved, and therefore the problem of insufficient supporting force is solved. The first supporting ball and the second supporting ball can be obtained by weaving weaving wires, and filter membranes are laid on the surfaces of the first supporting ball and the second supporting ball, so that thrombus in blood flow can be filtered while the supporting effect is achieved.

The present invention relates to a membrane-free partially degradable left atrial appendage occluder, belonging to the technical field of medical devices. It comprises an upper disk, a stent body and a lower disk; a stent body is arranged between the upper disk and the lower disk; the shape of the occluder is set to be cylindrical or drum-shaped; and the upper disk is set to be a closed structure. The closed plug-type design reduces the compression of the occluder on the peripheral structural tissues of the left atrial appendage; reduces the complications caused by atrial appendage puncture; has a low requirement on the depth of the implanted left atrial appendage, and has a wide range of applications. The occluder is woven with a dense mesh to achieve the effect of blocking blood flow, replacing the traditional flow-blocking membrane, so that the occluder can pass through a smaller delivery sheath to avoid the occurrence of iatrogenic atrial septal defect. The use of degradable polymer materials reduces the amount of metal implanted in the left atrial appendage occluder and the heart load on the patient. Through the design of the internal molding ring of the occluder, the radial supporting force of the occluder is enhanced, and the stability of the occluder in the body is improved.

The utility model provides a covered stent which is of a tubular structure with two open ends and comprises a main stent body, and a surface covering film is arranged on the surface of the main stent body. The main body stent comprises a plurality of supporting skeletons, the supporting skeletons are arranged at intervals in the axial direction of the covered stent, and every two adjacent supporting skeletons are connected through a surface covering film; the covered stent further comprises a bare stent, the near-end side of the main stent comprises a connecting stent, the bare stent is connected with the connecting stent through a connecting rod, and due to the arrangement of the bare stent, it can be ensured that in a straight-pipe-section blood vessel at the bifurcation opening position of the bifurcated blood vessel, when the two stents are matched in parallel, closed residual cavities are avoided, blood can normally circulate, and further, the blood can be prevented from being blocked. When the bare stents are pressed in the radial direction, at least one side in the circumferential direction can deform, and after deformation, the two bare stents can form two semicircular bare stents, so that the two semicircular bare stents are attached to the tube wall of a straight tube section blood vessel to form a complete circular structure, and the radial supporting force of the position is enhanced while a closed residual cavity is prevented from being formed.

This invention discloses a braided mesh stent and a method for manufacturing the braided mesh stent. The braided mesh stent comprises N sections of braided mesh tubing, which are formed by braiding filaments, where N ≥ 2 and N is a natural number. Each section of the braided mesh tubing has a first end and a second end arranged opposite to each other along its axial direction. The second end of the i-th section of the braided mesh tubing is partially connected to the first end of the (i+1)-th section of the braided mesh tubing in the circumferential direction or indirectly connected through a flexible element, forming a movement allowance between the i-th and (i+1)-th sections of the braided mesh tubing and creating a blood flow channel within the stent, where 1 ≤ i ≤ N-1 and i is a natural number. Because there is a movement allowance between adjacent braided mesh tubing sections, the two sections can move freely relative to each other, reducing the stent's obstruction of blood vessels and preventing excessive local stress that could lead to stent breakage.

The present invention provides a mesh device and a ligation device system for tissue ligation, wherein the mesh device for tissue ligation comprises a support module, a mesh bag and a connection module, wherein the support module comprises a support ring, a skirt and at least one guide rod, wherein the skirt covers the support ring, and the proximal end and the distal end of the guide rod are respectively provided with a first bending portion and a second bending portion, wherein the first bending portion and the second bending portion are bent to the same side of the guide rod, and the first bending portion is connected to the support ring; at least one end of the mesh bag is provided with an opening, and the open end of the mesh bag is detachably connected to the support ring along the circumferential direction through the connection module. The present invention improves the radial supporting force required for the mesh bag to capture the target tissue during the tissue ligation process, avoids the mesh bag from slipping off the target tissue during the ligation process, improves the success rate of tissue ligation, and increases the stability of the ligation device system.

The present invention discloses a blocking device, which includes a first disc, a second disc, a waist and a connecting part; wherein the first disc and the second disc are connected through the waist; the first disc is used to be placed on the first side of the part to be blocked; the second disc is used to be placed on the second side of the part to be blocked; the waist runs through the part to be blocked; the first disc and / or the second disc are provided with the connecting part on one side close to the part to be blocked, and the connecting part is used to be fixedly connected with the surrounding tissue of the part to be blocked. The present invention can accurately block the part to be blocked, and can make the first disc, the second disc and the waist fit well on the surrounding tissue wall of the part to be blocked, and can prevent the blocking device from falling off, and can prevent excessive blocking by using the blocking device, so as to prevent the blood flow of the collateral vessels of the part to be blocked from being blocked and avoid paralysis.

This invention relates to the field of machine tool spindle adjustment and correction technology, specifically a large CNC machine tool based on spindle error early warning correction, comprising: a multi-directional displacement mechanism and a displacement detection module. The displacement detection module includes a PLC signal sensor, a displacement sensor, and an early warning sensor. The displacement sensor can detect the displacement of the multi-directional displacement mechanism and, after collecting the detection data, feeds it back to the PLC signal sensor so that an early warning is issued when abnormal displacement occurs. A torque control mechanism and an error detection module are provided on the spindle. The error detection module includes a pressure sensor and an adjustment controller. The pressure sensor detects the spindle yaw angle, and the adjustment controller releases an execution command to adjust the support arm of the spindle through the torque control mechanism. This application uses the error detection module to monitor the spindle in real time and actively adjust the torque and support force on the spindle, thereby achieving the effect of automatic spindle correction.