A cross-supported helical popliteal artery stent and its manufacturing method

A technology of cross support and manufacturing method, which is applied in the field of medical devices, can solve the problem that the lower extremity artery stent cannot be fully applied to the popliteal artery, and achieve excellent flexibility and the effect of not being easily compressed radially

Active Publication Date: 2021-12-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is: the existing lower extremity artery stent cannot be fully applied to the popliteal artery, and the purpose is to provide a cross-supported helical popliteal artery stent and its manufacturing method, which has good flexibility and sufficient radial support Strength, excellent torsion adaptability and excellent fatigue performance, to solve the problem that the existing lower extremity artery stents cannot be fully applied to the popliteal artery

Method used

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  • A cross-supported helical popliteal artery stent and its manufacturing method
  • A cross-supported helical popliteal artery stent and its manufacturing method
  • A cross-supported helical popliteal artery stent and its manufacturing method

Examples

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Embodiment 1

[0045] figure 1 Diagram of a cross-helical structure supporting popliteal artery stent embodiment of the present embodiment. As shown in FIG. A spiral cross braces popliteal artery stent, comprising a support ring and a connecting rod, the connecting rod and the support ring are alternately connected, both ends of the stent to the support ring, in the present embodiment, the coil support cross popliteal artery stent length of 20mm. Wherein the support ring comprises a number of clockwise and counter-clockwise spiral spiral, helix clockwise and counterclockwise spiral according to the actual circumstances, in the present embodiment, clockwise and counterclockwise spiral helix are 5.

[0046] 5 above and 5 clockwise spirals counterclockwise spiral arranged in the pitch radius of a virtual cylindrical surface R and the like, two neighboring clockwise helix or anticlockwise helix angle apart adjacent namely 72 °, 5 above and 5 clockwise spiral counter-clockwise spiral lines intersect...

Embodiment 2

[0053] figure 2 CROSS-based method for manufacturing a helical support popliteal artery stent embodiment. FIG. As shown, the cross support bracket helical popliteal manufacturing method, comprising the steps of:

[0054] Step 1: spatial orientation of the stent, the stent ascertain the essential characteristics of the basic features include: a reference plane, the reference axis and the reference coordinate system.

[0055] Step 2: According to the basic characteristics, the establishment of a spiral curve equation. The spiral curve equation set with reference to a Cartesian coordinate equations in Example 1, by the control parameters of the control equation Cartesian spatial position of the spiral structure and morphology characteristic curve node, and wherein the spatial spiral shape and position of the structural feature node determining curve characteristics of the stent.

[0056] Step 3: according to the characteristic curve, the cross section properties of the stent is cont...

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Abstract

The invention discloses a cross-supporting spiral popliteal artery stent, which comprises support rings and connecting rods, the support rings and the connecting rods are alternately connected, and the two ends of the stent are support rings. Among them, the support ring includes a clockwise helix and a counterclockwise helix, and multiple clockwise helixes and multiple counterclockwise helixes are arranged at equal intervals on a virtual cylindrical surface with a radius R, and multiple clockwise helixes and multiple The counterclockwise helical lines intersect; the connecting rod includes a right-handed helical line, and a plurality of right-handed helical lines are arranged at equal intervals on the cylindrical surface, and a plurality of right-handed helical lines are connected with multiple intersection points on the circumference of the bottom surface of the support ring; the support ring is connected with the The rod has a winding height ratio of 1 or less. The cross-supported helical popliteal artery stent has excellent flexibility, sufficient adaptability to axial compression, sufficient torsion capacity, and sufficient radial support force. The stent provides support for blood vessels and is not prone to radial compression under load.

Description

Technical field [0001] Technical Field The present invention relates to medical instruments, in particular to a supporting cross popliteal spiral stent and manufacturing method thereof. Background technique [0002] Popliteal artery is an integral part of the lower extremity arteries, located in the rear side of the knee popliteal across the femur, tibia and patella, vulnerable to the impact of human movement. It contains a large deformation occurs in the axial compression, complex curved, radial compression and torsion, wherein the torsional deformation rarely occur in other arteries. [0003] Popliteal artery disease is one of peripheral artery disease, the prevalence increases with age, and has a high mortality rate, which treatment is usually stent implantation. However, owing to its special position, after the implantation of vascular stents susceptible to deformation causes compression of the stent is bent, and even rupture, thus lead to problems such as restenosis. This al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/17A61F2/82A61F2/91G06F119/14
CPCG06F30/20G06F30/17A61F2/82A61F2/91G06F2119/14A61F2240/00
Inventor 郑庭辉袁丁戴远钘胡洪瑞王家嵘
Owner SICHUAN UNIV
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