8results about How to "Improve radial support" patented technology

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 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 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 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 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.