CN109925104B - Novel truss type human body pipeline bracket - Google Patents

Abstract

The invention discloses a novel truss-type human body pipeline support, which includes at least one layer of telescopic structure, the telescopic structure includes a first frame, a second frame, a third frame, a first connecting rod and a second connecting rod, and the first frame includes at least one Three components, the components include long rods and short rods, at least three components are circumferentially arrayed to form a first frame, the first frame and the third frame have the same structure and are completely opposite, and the second frame is obtained by turning the first frame over and rotating, and the third frame is rotated. The centers of the arrays of the first frame, the second frame and the third frame are collinear, the outer convex points of the first frame, the second frame and the third frame are connected by the first link, the first frame, the second frame and the third frame The inner concave points are connected by the second connecting rod. The invention can ensure that during the expansion process of the stent, its axial length is elongated, so as to completely cover the diseased part, and ensure a sufficient actual contact area between the stent and the human body pipeline.

Description

New Truss Type Human Body Pipe Support

technical field

The invention relates to the technical field of human body pipeline supports, in particular to a novel truss type human body pipeline support.

Background technique

Coronary heart disease, myocardial infarction, esophageal obstruction, esophageal stenosis, central airway organic stenosis and other diseases seriously threaten human health. At present, the most effective method to treat such diseases caused by human duct stenosis and obstruction is stent implantation.

Stent implantation refers to the use of techniques such as puncture, catheter, balloon catheter expansion and metal stent placement to dilate and recanalize narrowed and occluded blood vessels or cavities, and to solve the blind spot of traditional surgery. Interventional therapy has the advantages of less trauma, high efficacy, low risk, fewer complications, and shorter hospitalization time, which opens up a new way for the treatment of blood vessel and lumen stenosis or occlusion.

The axial shortening of traditional stents occurs during radial expansion, and the greater the radial expansion, the greater the axial shortening, which may lead to incomplete coverage of the lesion and greatly affect the treatment effect.

In addition, most of the traditional stents are of two-dimensional design, that is, they have a planar structure after being cut and unfolded along the generatrix of the stent. After this structure expands in the radial direction, the grid structure on the wall of the cylindrical stent is stretched and opened, and the grid cells will become larger, and the larger the stent expansion, the larger the cells will become, which will cause the stent and the unit area to become larger. The actual contact area of the human body pipeline wall is sharply reduced, so that the load of the human body pipeline wall surface cannot be effectively shared on the grid structure of the stent, thereby causing damage to human tissue, and even the stent cannot provide sufficient radial strength and cause the stent to be crushed. .

Therefore, how to provide a stent that can ensure that the axial length of the stent is elongated during the expansion process, so as to ensure complete coverage of the diseased part, and ensure sufficient actual contact area between the stent and the human body pipeline, is an urgent solution for those skilled in the art. technical problem.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a novel truss-type human body pipeline stent, which can ensure that the axial length of the stent is elongated during the expansion process, thereby ensuring complete coverage of the diseased part and sufficient actual contact area between the stent and the human body pipeline.

For achieving the above object, the present invention provides the following scheme:

The invention discloses a novel truss-type human body pipeline support, comprising at least one layer of telescopic structure, the telescopic structure including a first frame, a second frame, a third frame, a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod. A frame, the second frame and the third frame are respectively located in a first plane, a second plane and a third plane which are arranged in sequence and parallel to each other, and the distance between the first plane and the second plane is equal to the distance between the first plane and the second plane. The distance between the second plane and the third plane, the first frame includes at least three components, the components include long rods and short rods, at least three of the components are circumferentially arrayed to form the first frame, in In each of the components, the first end of the long rod and the first end of the short rod are fixedly connected through a transition arc segment, and the midpoint of the transition arc segment is point a. Each of the components The second end of the long rod is fixedly connected with the second end of the short rod of the adjacent component, the connection point is point b, the point a of the first frame is convex, the first The b point of the frame is concave, the first frame and the third frame have the same structure and are exactly opposite, the second frame has the same structure as the first frame, and the second frame is the first frame. After a frame is turned over and rotated, the axial projections of the b point of the first frame and the b point of the second frame are staggered from each other, and the first frame, the second frame and the The center of the circular array of the third frame is collinear, the point a of the first frame and the point a of the second frame are fixedly connected by the first link, and the a point of the second frame The point a and the point a of the third frame are fixedly connected by the first link, and the point b of the first frame and the point b of the second frame are connected by the second link Fixed connection, the b point of the second frame and the b point of the third frame are fixedly connected through the second connecting rod, and a plurality of the first connecting rods are connected end to end to form a zigzag fold line. Each of the second connecting rods are connected end to end to form a zigzag fold line. When the telescopic structure is multi-layered, for two adjacent layers of the telescopic structure, the third frame of the telescopic structure on the upper layer and the telescopic structure on the lower layer The first frame of the telescopic structure is integrally provided.

Preferably, the novel truss-type human body pipeline support is made by 3D printing equipment.

Preferably, the surface of the novel truss-type human body pipeline stent is coated with a drug layer that resists rejection.

Preferably, a balloon is provided inside the novel truss-type human body pipeline support, and a conduit is fixed at the air inlet of the balloon, and the conduit is used to communicate with the inflatable structure.

The present invention has achieved the following technical effects with respect to the prior art:

The stent of the present invention can realize radial and axial expansion at the same time during expansion, the stent can be introduced into the human body with a smaller axial size, which reduces the difficulty of introduction, and can cover a larger patient site after expansion, avoiding the need for In order to set up multiple stents due to the incomplete coverage of the patient site by a single stent, the treatment cost is reduced; when the stent of the present invention is expanded, the b point of the first frame, the second frame and the third frame moves outward, and the long rod and the short The included angle of the rod becomes larger, and the second connecting rod moves outward. The long rod, short rod and second connecting rod originally hidden inside the stent are in contact with the inner wall of the human body pipeline during the expansion of the stent, which can increase the distance between the stent and the human body pipeline. The contact area is reduced, thereby reducing the damage of the stent to human tissue, and ensuring that the stent has sufficient radial support strength to stabilize the lumen of the diseased pipeline.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the top view schematic diagram of the first frame;

Fig. 2 is the top view direction schematic diagram of the second frame;

3 is a schematic top view of the relative relationship between the first frame and the second frame;

Fig. 4 is the perspective direction schematic diagram of the relative relationship of the first frame, the second frame and the third frame;

5 is a schematic top view of the overall structure of the novel truss-type human body pipeline support of the present embodiment;

6 is a schematic perspective view of the overall structure of the novel truss-type human body pipeline support of the present embodiment;

Description of reference numerals: 1-first frame; 11-long rod; 12-short rod; 13-a point; 14-b point; 2-second frame; 3-third frame; 4-first link; 5-Second link.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a novel truss-type human body pipeline stent, which can ensure that during the expansion process, the axial length of the stent is elongated, thereby ensuring complete coverage of the diseased part.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIGS. 1-6 , this embodiment provides a novel truss-type human body pipeline support, which includes at least one layer of telescopic structures. The telescopic structure includes a first frame 1, a second frame 2, a third frame 3, a first link 4 and a second link 5. The first frame 1, the second frame 2 and the third frame 3 are located in sequence and mutually In the parallel first plane, second plane and third plane, the distance between the first plane and the second plane is equal to the distance between the second plane and the third plane. The first frame 1 includes at least three components, the components include a long rod 11 and a short rod 12 , and the at least three components are circumferentially arrayed to form the first frame 1 . In each assembly, the first end of the long rod 11 and the first end of the short rod 12 are fixedly connected through a transition arc segment, and the midpoint of the transition arc segment is point a 13 . The second end of the long rod 11 of each assembly is fixedly connected with the second end of the short rod 12 of the adjacent assembly, and the connection point is point b 14 . Point a 13 of the first frame 1 is convex, and point b 14 of the first frame 1 is concave. The first frame 1 and the third frame 3 have the same structure and are completely opposite to each other, the second frame 2 has the same structure as the first frame 1, and the second frame 2 is obtained by turning the first frame 1 over and rotating, so that the b point of the first frame 1 14 and the axial projections of point b 14 of the second frame 2 are offset from each other, and the centers of the circular arrays of the first frame 1 , the second frame 2 and the third frame 3 are collinear. The point a 13 of the first frame 1 and the point a 13 of the second frame 2 are fixedly connected by the first link 4 , and the point a 13 of the second frame 2 and the point a 13 of the third frame 3 are fixed by the first link 4 Connected, the point b 14 of the first frame 1 and the point b 14 of the second frame 2 are fixedly connected by the second link 5, and the point b 14 of the second frame 2 and the point b 14 of the third frame 3 are connected by the second link 5 fixed connection. A plurality of first connecting rods 4 are connected end to end to form a zigzag fold line, and a plurality of second connecting rods 5 are connected end to end to form a zigzag fold line. The connecting points of the long rod 11 , the short rod 12 , the first connecting rod 4 and the second connecting rod 5 are all rounded corners. When the telescopic structure is multi-layered, for adjacent two-layer telescopic structures, the third frame 3 of the upper telescopic structure and the first frame 1 of the lower telescopic structure are integrally provided.

When the novel truss-type human body pipeline stent of this embodiment is in use, a stent introduction channel is first formed near the patient site by puncturing, and then the stent in a contracted state is sheathed outside the balloon at the end of the catheter, and the balloon is inflated a little, The outer surface of the balloon is firmly abutted against the inner side of the stent, the stent is sent to the designated position through the catheter, the inflation structure inflates the balloon through the catheter, and the stent expands with the balloon. The gas is exported, the catheter and the balloon are taken out as a whole, and the puncture site is sutured. Since the stent cannot be taken out once it is used, if occlusion and stenosis symptoms occur again in the patient site, the stent can be superimposed on the inside of the erected stent.

The stent in the prior art generally shrinks in the axial direction or does not change in length while expanding radially. In this way, in order to completely cover the patient part, it is necessary to introduce a stent with the same length as the patient part or even longer, which increases the difficulty of introduction; or a stent with a smaller length is still introduced, but multiple stents need to be arranged in sequence in the length direction. , so as to realize the combined support, but this greatly increases the purchase cost of the stent and increases the burden on the patient.

The smallest unit of the stent in this embodiment to achieve the support function is a telescopic structure, and the number of layers and the size of the telescopic structure can be selected according to the length and diameter of the patient site.

For a single telescopic structure, since the point a 13 of the first frame 1 is convex and the point b 14 is concave, when the point b 14 is moved outward by the pressure of the balloon, the first frame 1 is expanded in the radial direction . The same is true for the second frame 2 and the third frame 3 . Since the second frame 2 is obtained by turning the first frame 1 over and rotating, the axial projections of the b point 14 of the first frame 1 and the third frame 3 are staggered from the axial projection of the b point 14 of the second frame 2, and the first frame 1 The axial projections of the point a 13 of the third frame 3 and the point a 13 of the second frame 2 are staggered from each other, and the first link 4 and the second link 5 are both arranged obliquely. When the telescopic structure is expanded under the support of the balloon, the distance between the first plane and the second plane and the distance between the second plane and the third plane gradually increase, and the first link 4 and the second link 5 gradually approach the vertical Straight direction (but the fully expanded position will not be vertical), to achieve axial expansion of the stent.

Therefore, compared with the prior art, the stent of this embodiment can simultaneously achieve radial and axial expansion during expansion. The stent can be introduced into the human body with a smaller axial size, which reduces the difficulty of introduction, and can cover a larger patient part after expansion, avoids setting up multiple stents due to incomplete coverage of the patient part by a single stent, and reduces the cost of the stent. treatment fee.

Most of the stents in the prior art are of two-dimensional design. Before and after radial expansion, the contact area between the stent and the inner wall of the human body pipeline remains unchanged, but the actual contact area between the stent and the wall surface of the human body pipeline per unit area decreases sharply.

In the retracted state of the stent of the present invention, the angle between the long rod 11 and the short rod 12 is relatively small, and the radial distance between point a 13 and point b 14 on the first frame 1 , the second frame 2 and the third frame 3 is relatively different. Large (relative to the center of the circular array), only the first link 4 can contact the inner wall of the human body pipeline; when expanding, the b point 14 of the first frame 1, the second frame 2 and the third frame 3 moves outward, and the long rod 11 and the short The included angle of the rod 12 becomes larger, the second connecting rod 5 moves outward, and the long rod 11, the short rod 12 and the second connecting rod 5, which were originally hidden inside the stent, are in contact with the inner wall of the human body pipe during the expansion of the stent (the inner wall of the human body pipe). can be deformed).

Therefore, compared with the prior art, the stent of this embodiment can increase the contact area with the human body pipeline during expansion, thereby reducing the damage to human tissue caused by the stent, and ensuring that the stent has sufficient radial support strength to stabilize lesions. the lumen of the pipe.

When the telescopic structure is multi-layered, for adjacent two-layer telescopic structures, the third frame 3 of the upper telescopic structure and the first frame 1 of the lower telescopic structure are integrally arranged, which means the third frame of the upper telescopic structure 3 is the first frame 1 of the lower telescopic structure, in this way, the mutual combination of multiple telescopic structures is realized.

The above-mentioned bracket structure in this embodiment is made by 3D printing equipment, and 3D printing is a mature additive manufacturing technology, which will not be repeated here.

In order to avoid secondary damage to the patient site, the first end of the long rod 11 and the first end of the short rod 12 in this embodiment are fixedly connected through a transition arc segment, so that the convex point a is a smooth structure. Because the plane of the zigzag fold line is perpendicular to the radial direction of the first frame, the second frame and the third frame, and during the expansion process of the stent, the zigzag fold line gradually approaches a straight line, and it is no longer sharp when it contacts the human body pipeline. Therefore, no arc transition is required.

In order to improve the therapeutic effect and prevent rejection after the stent is introduced into the human body, in this embodiment, a drug layer that resists rejection is coated on the surface of the stent.

As for the material of the human body pipeline stent in this embodiment, those skilled in the art can choose according to actual needs, as long as it can be 3D printed and has a certain plastic deformation ability, and can be stretched under the action of the balloon, such as stainless steel, Nickel-titanium alloy, cobalt-chromium alloy, polymer or degradable polymer materials such as polylactic acid and other materials.

In this specification, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; The idea of the invention will have changes in the specific implementation manner and application range. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (4)

1. A novel truss-type human body pipeline support, characterized in that it includes at least one layer of telescopic structure, and the telescopic structure includes a first frame, a second frame, a third frame, a first link and a second link, so The first frame, the second frame and the third frame are respectively located in the first plane, the second plane and the third plane which are arranged in sequence and parallel to each other, and the distance between the first plane and the second plane equal to the distance between the second plane and the third plane, the first frame includes at least three components, the components include long rods and short rods, and a circumferential array of at least three of the components forms the first frame , in each of the components, the first end of the long rod and the first end of the short rod are fixedly connected through a transition arc segment, the midpoint of the transition arc segment is point a, and each The second end of the long rod of the component is fixedly connected with the second end of the short rod of the adjacent component, the connection point is point b, the point a of the first frame is convex, the The point b of the first frame is concave, the first frame and the third frame have the same structure and are exactly opposite, the second frame is the same as the first frame, and the second frame is the same. After the first frame is turned over and rotated, the axial projections of the b point of the first frame and the b point of the second frame are staggered from each other, and the first frame, the second frame and the The centers of the circular arrays of the third frame are collinear, the point a of the first frame and the point a of the second frame are fixedly connected by the first link, and all the points of the second frame are fixedly connected. The point a and the point a of the third frame are fixedly connected through the first link, and the point b of the first frame and the point b of the second frame are connected to the second frame through the second link. The connecting rods are fixedly connected, the b point of the second frame and the b point of the third frame are fixedly connected through the second connecting rods, and a plurality of the first connecting rods are connected end to end to form a zigzag broken line , a plurality of the second connecting rods are connected end to end to form a zigzag fold line. When the telescopic structure is multi-layered, for two adjacent layers of the telescopic structure, the third frame of the upper telescopic structure is connected to the The first frame of the telescopic structure of the lower layer is integrally provided. 2 . The novel truss-type human body pipeline support according to claim 1 , wherein the novel truss-type human body pipeline support is made by 3D printing equipment. 3 . 3 . The novel truss-type human body pipeline stent according to claim 1 , wherein the surface of the novel truss-type human body pipeline stent is coated with a drug layer that resists rejection reaction. 4 . 4. The novel truss-type human body pipeline support according to claim 1 is characterized in that, a balloon is provided inside the novel truss-type human body pipeline support, and a catheter is fixed at the air inlet of the balloon, and the catheter is used for to communicate with the inflatable structure.

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