CN118105219A

CN118105219A - Combined coronary stent

Info

Publication number: CN118105219A
Application number: CN202211519140.0A
Authority: CN
Inventors: 庞哲; 洪浪; 马琛明; 钦湘; 李加贤; 沈麒麟; 顾佳佳
Original assignee: Nanjing Shengde Medical Technology Co ltd
Current assignee: Nanjing Shengde Medical Technology Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2024-05-31

Abstract

The invention belongs to the technical field of medical equipment, and particularly relates to a combined coronary artery stent which comprises a plurality of stent units spliced end to end, wherein each stent unit comprises a splicing structure and a main body supporting structure, the splicing structure is arranged at two ends of the main body supporting structure and used for splicing two adjacent stent units together, the main body supporting structure comprises a plurality of supporting units and a connecting structure, the supporting units are axially arranged along the stent, and the connecting structure is arranged between the two adjacent supporting units and used for connecting the two adjacent supporting units together. The combined coronary stent only comprises one length specification, can be expanded to different specifications through the balloon, greatly improves convenience for doctors to select the stent, and improves timeliness and customized treatment means for treatment of patients; meanwhile, for vascular long lesions, the adverse effect generated at the uncoupling position of the short stent is eliminated.

Description

Combined coronary stent

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to a combined coronary stent.

Background

Coronary heart disease is an acronym for coronary atherosclerotic heart disease, which is usually caused by stenosis or blockage of the lumen of a blood vessel due to coronary atherosclerosis, or by ischemia hypoxia or necrosis of the heart muscle due to functional changes (spasticity) in the coronary artery. The coronary artery stent is an intravascular stent made of metal or polymer materials, and can be delivered to a coronary artery lesion site through a catheter in a closed state, and then expanded by balloon expansion, so that the stent has the effects of supporting the vessel wall and recovering the blood flow of the lesion site.

With the acceleration of population aging, diversification of dietary structures and acceleration of life rhythm in China, the incidence rate of cardiovascular diseases such as coronary heart disease and the like is increased year by year, and coronary heart disease patients are gradually increased, because coronary stent implantation is small in wound, quick in recovery and high in success rate, the coronary stent implantation is an important means for interventional cardiovascular therapy, and therefore the demand of coronary stent implantation is increasing.

At present, the coronary artery stent mainly takes 316 medical stainless steel, cobalt-chromium alloy, nickel-titanium alloy and other metal materials with good biocompatibility and high mechanical property as main materials, has various structures, is designed into different types of specifications with different diameters of 2.25-4mm and different lengths of 8-40mm, and adopts different specifications of the coronary artery stent aiming at different lesions. For different lesions, the doctor has difficulty in choosing when selecting the model of the stent, can not take a customized treatment scheme for each patient, and can only select from the existing standard stents, so that the stent with variable length and diameter is very necessary.

In addition, in coronary artery long lesion treatment, a long stent is implanted, the long stent has insufficient radial supporting force on a lesion vessel, and is difficult to cope with complex and severe physiological loads, and the long-term effect is poor; if multiple short stents are implanted, thrombosis or restenosis may occur where the multiple short stents do not meet. It is therefore desirable to provide a stent that is combinable at coronary lesions.

In the prior art, the coronary stent has a plurality of specifications and models, the diameter is 2.25mm-4.0mm, the length is 8mm-40mm, a certain trouble is brought to the doctor for the type selection of stent treatment, a series of adverse consequences such as blood vessel interlayer, incomplete coverage of lesions, thrombus, poor long-term effect and the like can occur when the type selection is improper, so that the doctor can select the stents with different specifications and models according to the lesions of patients, but no customized coronary stent product treatment scheme can be provided for each patient on the market. In addition, for patients with longer coronary lesions, it is common to choose to implant a long stent or multiple short stents to cover all the lesion sites; however, if a long stent is implanted, the long stent is difficult to cope with complex and severe physiological loads, and has poor long-term effect; if a plurality of short stents are implanted, there are disadvantages such as thrombus, vascular dissection, and restenosis that occur at the non-junction of the short stents.

Disclosure of Invention

The invention aims to solve the problems and provides a technical scheme for improving the prior art, so as to provide a combined coronary stent. The stent only comprises one length specification, the diameter can be expanded to different specifications through the balloon, convenience is greatly improved for doctors in selecting the stent, timeliness is improved for treatment of patients, and customized treatment means are provided for lesion treatment of different patients; simultaneously, a plurality of stents provided by the invention are implanted for vascular long lesions, and each stent is spliced and combined in the blood vessel after implantation through a head-tail connection structure, so that adverse effects generated at the uncoupling position of the short stents are eliminated.

The technical aim of the invention is realized by the following technical scheme:

An embodiment of the invention provides a combined coronary artery stent, which is characterized by comprising a plurality of stent units spliced end to end, wherein each stent unit comprises a splicing structure and a main body supporting structure, the splicing structure is arranged at two ends of the main body supporting structure and used for splicing two adjacent stent units together, the main body supporting structure comprises a plurality of supporting units and a connecting structure, the plurality of supporting units are axially arranged along the stent, and the connecting structure is arranged between the two adjacent supporting units and used for connecting the two adjacent supporting units together.

According to one embodiment of the present invention, a combined coronary stent is provided, wherein the supporting unit is in a shape of "W" or "U".

According to the combined coronary artery stent provided by the embodiment of the invention, the splicing structure comprises a first splicing structure and a second splicing structure which are respectively arranged at two ends of the main body supporting structure, and the shapes and the sizes of the first splicing structure and the second splicing structure are matched with each other, so that the stent is mutually buckled through the splicing structures.

According to the combined coronary artery stent provided by the embodiment of the invention, the splicing structure is composed of an inverted V-shaped structure and an O-shaped structure, wherein the inner arc diameter of the inverted V-shaped structure is larger than 1mm-2mm of the outer arc diameter of the O-shaped structure, so that the O-shaped structure can be ensured to be buckled in the inverted V-shaped structure, and falling off is avoided.

According to the combined coronary artery stent provided by the embodiment of the invention, the splicing structure is composed of a U-shaped structure and an M-shaped structure, wherein the U-shaped structure is inserted into the corresponding U-shaped structure, and the M-shaped structure is inserted into the corresponding M-shaped structure so as to finish splicing.

According to one embodiment of the present invention, a combined coronary stent is provided, wherein the splicing structure is formed of an L-shaped and inverted L-shaped structure, and the L-shaped and inverted L-shaped structures are combined with each other to complete the splicing.

According to the combined coronary artery stent provided by the embodiment of the invention, the splicing structure is characterized by further comprising a combination of an O-shaped structure and a C-shaped structure with arc-shaped hook parts, a T-shaped structure and a C-shaped structure with right-angle-shaped hook parts or a J-shaped structure and an inverted J-shaped structure, and the two structures of each combination are matched with each other to finish splicing.

According to the combined coronary artery stent provided by the embodiment of the invention, the connecting structure is a connecting rod, and the connecting rods are uniformly distributed along the circumferential direction of the stent; the connecting rod is in an I shape, a U shape or an S shape.

According to one embodiment of the present invention, a combined coronary stent is provided, wherein the diameter of the stent ranges from 2mm to 5mm, the length of the stent ranges from 10mm to 20mm, the thickness of the stent ranges from 0.05mm to 0.2mm, and the width of the stem ranges from 0.1mm to 0.3mm.

According to the combined coronary artery stent provided by the embodiment of the invention, the composite material of the stent is stainless steel, cobalt chromium, magnesium alloy or zinc alloy, and the preparation mode of the stent comprises laser engraving, heat treatment and surface chemical polishing treatment.

In summary, the invention has the following beneficial effects:

1. The combined type bracket provided by the invention has only one specification and model, the diameter can be expanded to be between 2mm and 5mm by the balloon, and the same brackets can be implanted according to the lesion length requirement of each patient to achieve the purpose of covering lesions, so that more convenient and simple selection is brought to doctors, customized treatment schemes are provided for each patient, and better treatment effect is achieved.

2. The stent provided by the invention can solve a series of adverse problems caused by implanting a plurality of short stents in a blood vessel in a splicing and combining mode, and simultaneously the buckling operation of the stent in the blood vessel is simple and convenient, and each post-implanted stent can be combined and spliced with the former implanted stent only by a simple rotary conveying system. The combined stent provided by the invention not only achieves the effect of treating long vascular lesions by implanting a long stent, but also solves the problems of serious thrombus, vascular interlayer or restenosis and the like caused by implanting a plurality of short stents.

3. The combined bracket provided by the invention is made of metal materials, has stronger safety performance, is easy to combine and splice, and has better comprehensive mechanical property, biological property, wear resistance, corrosion resistance and the like; further, the support units of the support are W-shaped and U-shaped, the support units form a main support structure, and the support units are connected in the axial direction through connecting rods in a spiral direction, so that the flexibility and the stability of the support structure are improved; furthermore, the splicing structures arranged at the two ends of the bracket strengthen the structural rigidity of the end parts, the two ends of the head and the tail of the bracket are not easy to deform under the action of the saccule, the dog bone effect in the expanding process is prevented, the expanding uniformity of the bracket is kept, and the convenient operation is provided for the combined splicing of the bracket; furthermore, the stent is designed to be ultra-thin, preferably, the thickness of the stent is 0.07+/-3% mm, so that the endothelialization process of the stent is facilitated, the disturbance of the stent ribs on the vascular flow field is reduced, the shearing stress is reduced, and the risk of early thrombus is reduced.

Drawings

The present disclosure will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: the drawings are only for illustrating the technical scheme of the present invention and are not intended to limit the scope of the present invention.

In the figure:

FIG. 1 is an expanded view of a combined coronary stent according to embodiment 1 of the present invention;

FIG. 2 is an assembled view of a combined coronary stent according to embodiment 1 of the present invention;

FIG. 3 is a schematic view showing a combined coronary stent according to embodiment 2 of the present invention;

FIG. 4 is an expanded view of a combination coronary stent according to embodiment 3 of the present invention;

FIG. 5 is an expanded view of a combined coronary stent according to embodiment 4 of the invention;

FIG. 6 is an expanded view of a combined coronary stent according to embodiment 5 of the invention;

fig. 7 is a development view of a combined coronary stent according to embodiment 6 of the present invention.

The reference numerals in the drawings are: splicing structure-10; a main body support structure-11; a support unit-111; -a connection structure-112; a first splice structure-10 a; a second splice structure-10 b; an "O" shaped structure-101; inverted "V" shaped structure-102; splicing structure-20; a main body support structure-21; a support unit-211; -a connection structure 212; a first splice structure-20 a; a second splice structure-20 b; splice structure-30; a main body support structure-31; a supporting unit-311; a connection structure-312; a first splice structure-30 a; and a second splice structure-30 b.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be noted that the drawings are only illustrative, not drawn to strict scale, and that there may be some enlargement and reduction for convenience of description, and some default may be given to the known portions.

In the description of the present specification, a description of the present invention with reference to the terms "one embodiment," "example," "specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Example 1

1-2, A combined coronary stent of a preferred embodiment of the present invention is shown comprising a plurality of stent units spliced end to end, wherein each of the stent units comprises a splice structure 10 and a main body support structure 11. The splicing structures 10 are disposed at two ends of the main body supporting structure 11, and are used for splicing two adjacent bracket units together. The main body support structure 11 includes a plurality of support units 111 and a connection structure 112. The plurality of support units 111 are arranged along the axial direction of the bracket, and the connecting structure 112 is disposed between two adjacent support units 111 for connecting the two adjacent support units 111 together.

Preferably, the supporting unit 111 has a "W" -shaped structure. The expansion and the combination of the W-shaped structure are realized through the expansion and the compression of the W-shaped structure, and the main body support structure achieves different bracket diameters. The "W" shape allows the stent to achieve adequate radial support force, as well as uniformity of expansion.

The "W" shaped support units 111 are arranged along the stent axial direction. The adjacent two W-shaped supporting units 111 are connected by at least one connecting rod 112, for example, one or two or more connecting rods are uniformly distributed along the circumferential direction. The connecting rod 112 of the combined coronary artery stent realizes the connection of the wave crest and the wave trough of each W-shaped structure in the stent supporting unit 111, and the stent has no serious extension and contraction in the axial direction, thereby facilitating the splicing process of the stent in the expansion of coronary artery lesion positions.

The splice structure 10 includes a first splice structure 10a and a second splice structure 10b, each positioned at the head and tail of the bracket. The splicing structure 10 is formed by combining an 'O' -shaped structure 101 and an inverted 'V' -shaped structure 102, wherein the inner arc diameter of the inverted 'V' -shaped structure 102 is 1mm-2mm larger than the outer arc diameter of the 'O' -shaped structure 101, so that the 'O' -shaped structure 101 can be buckled in the inverted 'V' -shaped structure 102, and falling cannot occur.

Preferably, the first splicing structure 10a and the second splicing structure 10b of the combined coronary stent respectively comprise 4O-shaped structures 101 and inverted V-shaped structures 102, the stent can complete head-to-head splicing, namely 10a-10a, can complete tail-to-tail splicing, namely 10b-10b, or can complete head-to-tail combination, namely 10a-10b, the splicing is convenient, the operation is simple, and the complete coverage of the coronary lesion position can be realized. The first and second splice structures 10a and 10b may further include 2, 6, 8, or more "O" structures 101 and inverted "V" structures 102.

The spliced coronary stent of the embodiment is formed by laser engraving, heat setting treatment and surface chemical polishing treatment of stainless steel, cobalt-chromium, magnesium alloy or zinc alloy pipes.

Example 2

Referring to fig. 3, there is shown a modular coronary stent of another preferred embodiment of the present invention, the body of which comprises a splice structure 20 and a body support structure 21. The main body support structure 21 includes a plurality of support units 211 and a connection structure 212. The plurality of support units 211 are arranged along the axial direction of the bracket, and the connection structure 212 is disposed between two adjacent support units 211 for connecting the two adjacent support units 211 together.

Preferably, the supporting unit 211 has a "U" -shaped structure. The U-shaped supporting units 211 and the connecting structures 212 are uniformly distributed in the circumferential direction of the stent, and the spliced coronary stent has excellent flexibility and enough radial supporting force. The "U" shaped support unit 211 may allow the splice-type coronary stent to achieve different intended diameters of use when expanded and compressed.

The "U" -shaped supporting units 211 are arranged along the axial direction of the bracket. The adjacent two "U" -shaped supporting units 211 are connected by at least one connection structure 212, which may be two, three or four.

The splicing structure 20 comprises a first splicing structure 20a and a second splicing structure 20b, which are respectively positioned at the head and the tail of the bracket. The splice structure 20 is formed of a "U" shape and an "M" shape structure, wherein the U-shape structure is inserted into the corresponding "U" shape structure, and the "M" shape structure is inserted into the corresponding "M" shape structure to complete the splice.

Preferably, each of the first and second splice structures 20a and 20b includes four "U" shaped grooves and four "M" shaped grooves, and the number of "U" shaped grooves and "M" shaped grooves may be 2,4 or more. In the splicing process of the bracket, the U-shaped groove is inserted into the corresponding U-shaped groove, and the M-shaped groove is inserted into the corresponding M-shaped groove to finish the splicing.

Example 3

Referring to fig. 4, there is shown a modular coronary stent of another preferred embodiment of the present invention, the body of which comprises a splice structure 30 and a body support structure 31. The main body support structure 31 includes a plurality of support units 311 and a connection structure 312. The plurality of support units 311 are arranged along the axial direction of the bracket, and the connecting structure 312 is disposed between two adjacent support units 311 for connecting the two adjacent support units 311 together.

Preferably, the supporting unit 311 is of a "W" shaped structure. The W-shaped supporting units 311 and the connecting structures 312 are uniformly distributed in the circumferential direction of the stent, and the spliced coronary stent has excellent flexibility and enough radial supporting force. The "W" shaped support unit 311 may allow the spliced coronary stent to achieve different intended diameters of use when expanded and compressed.

The "W" shaped supporting units 311 are arranged along the stent axial direction. The adjacent two W-shaped supporting units 311 are connected by at least one connecting structure 312, which may be two, three or four.

The splicing structure 30 comprises a first splicing structure 30a and a second splicing structure 30b, which are respectively positioned at the head and the tail of the bracket. The splice structure 30 is constructed of an "L" shape and an inverted "L" shape, wherein the "L" shape and the inverted "L" shape are combined with each other to complete the splice.

Example 4

Referring to fig. 5, there is shown a modular coronary stent of another preferred embodiment of the present invention, the body of which includes a splice structure 40 and a body support structure 41. The main body support structure 41 includes a plurality of support units 411 and a connection structure 412. The plurality of support units 411 are arranged along the axial direction of the bracket, and the connection structure 412 is disposed between two adjacent support units 411 for connecting the two adjacent support units 411 together.

Preferably, the supporting unit 411 is of a "W" shaped structure. The W-shaped supporting units 411 and the connecting structures 412 are uniformly distributed in the circumferential direction of the stent, and the spliced coronary stent has excellent flexibility and enough radial supporting force. The "W" shaped support unit 411 may allow the spliced coronary stent to achieve different intended diameters of use when expanded and compressed.

The "W" shaped supporting units 411 are arranged along the axial direction of the stent. Two, three or four adjacent W-shaped supporting units 411 are connected by at least one connecting structure 412.

The splice structure 40 includes a first splice structure 40a and a second splice structure 40b, each positioned at the head and tail of the stent. The splice structure 40 is comprised of an "O" shape and a "C" shape structure having arcuate hooks, wherein the "O" shape and the "C" shape having arcuate hooks are sized and shaped to match one another to complete the splice.

Example 5

Referring to fig. 6, there is shown a modular coronary stent of another preferred embodiment of the present invention, the body of which includes a splice structure 50 and a body support structure 51. The main body support structure 51 includes a plurality of support units 511 and a connection structure 512. The plurality of support units 511 are arranged along the axial direction of the bracket, and the connection structure 512 is disposed between two adjacent support units 511 for connecting the two adjacent support units 511 together.

Preferably, the support unit 511 has a "W" shaped structure. The W-shaped support units 511 and the connection structures 512 are uniformly distributed in the circumferential direction of the stent, and the spliced coronary stent has excellent flexibility and sufficient radial support force. The "W" shaped support unit 511 may allow the spliced coronary stent to achieve different intended diameters of use when expanded and compressed.

The "W" shaped support units 511 are arranged along the stent axial direction. The adjacent two W-shaped supporting units 511 are connected by at least one connecting structure 512, which may be two, three or four.

The splicing structure 50 comprises a first splicing structure 50a and a second splicing structure 50b, which are respectively positioned at the head and the tail of the bracket. The splice structure 50 is constructed of a "T" shape and a "C" shape structure having right angle shaped hooks, wherein the "O" shape and the "C" shape having right angle shaped hooks are sized and shaped to match each other to complete the splice.

Example 6

Referring to fig. 7, there is shown a modular coronary stent of another preferred embodiment of the present invention, the body of which includes a splice structure 60 and a body support structure 61. The main body support structure 61 includes a plurality of support units 611 and a connection structure 612. The plurality of supporting units 611 are arranged along the axial direction of the bracket, and the connecting structure 612 is disposed between two adjacent supporting units 611 and is used for connecting the two adjacent supporting units 611 together.

Preferably, the supporting unit 611 has a "W" -shaped structure. The W-shaped supporting units 611 and the connecting structures 612 are uniformly distributed in the circumferential direction of the stent, and the spliced coronary stent has excellent flexibility and enough radial supporting force. The "W" shaped support unit 611 may allow the spliced coronary stent to achieve different intended diameters of use when expanded and compressed.

The "W" shaped supporting units 611 are arranged along the axial direction of the stent. Two, three or four adjacent W-shaped supporting units 611 are connected by at least one connecting structure 612.

The splicing structure 60 comprises a first splicing structure 60a and a second splicing structure 60b, which are respectively positioned at the head and the tail of the bracket. The splice structure 60 is formed of a "J" and inverted "J" configuration, wherein the "J" and inverted "J" shapes are sized and shaped to match one another to complete the splice.

The working principle of the combined coronary stent of the invention is as follows: the combined coronary stent is placed on a balloon of a conveying system in advance, the combined coronary stent and the balloon part of the conveying system are placed in a balloon expanding stent pressing and holding machine cavity together, the combined coronary stent is pressed and held and curled on the balloon of the conveying system by using a machine, and the combined splicing process is completed at a vascular lesion through a rotary balloon conveying system. The balloon is made of an elastic material and can provide support for the combined coronary stent to expand to different diameters. The combined coronary stent can be spliced with each other at the coronary vascular lesion without separating the head and the tail, and completely covers the lesion position.

The splicing structure can be formed by combining one or more than two shapes, and the brackets are buckled with each other through the splicing structure to form specifications with different lengths. The shapes of the first splicing structure and the second splicing structure can be symmetrical or can be arranged and combined differently. For example, the shape is a single or combined shape such as a circle, an arc, a square, a triangle, etc., preferably a circle. The shape structures of the first splicing structure and the second splicing structure can be one group, two groups, three groups, four groups, five groups and the like, and are preferably two groups and four groups. The splicing structure is not easy to fall off after being mutually buckled, and better support is provided for the blood vessel.

The combined type bracket provided by the invention has only one specification and model, the diameter can be expanded to be between 2mm and 5mm by the balloon, and the same brackets can be implanted according to the lesion length requirement of each patient to achieve the purpose of covering all lesions, so that more convenient and simple selection is brought to doctors, customized treatment schemes are provided for each patient, and better treatment effect is achieved. The stent provided by the invention can solve a series of adverse problems caused by implanting a plurality of short stents in a manner of splicing and combining in a blood vessel, and simultaneously the stent is simple and convenient to operate in the blood vessel, and each post-implanted stent can be spliced with the former implanted stent in a combined manner only by a simple rotary balloon conveying system. The combined stent provided by the invention not only achieves the effect of treating long vascular lesions by implanting a long stent, but also solves the problems of serious thrombus, vascular interlayer or restenosis and the like caused by implanting a plurality of short stents.

The foregoing detailed description of the invention has been presented for purposes of illustration and description, and it should be understood that the foregoing description is by way of illustration and not limitation, and any simple modification, equivalent variation and variation of the foregoing embodiments according to the technical principles of the present invention are within the scope of the inventive arrangements.

Claims

1. The utility model provides a combination formula coronary artery stent, its characterized in that includes a plurality of support units of head and tail concatenation, wherein, every support unit includes mosaic structure and main part bearing structure, mosaic structure set up in main part bearing structure's both ends for splice two adjacent support units together, main part bearing structure includes a plurality of supporting units and connection structure, a plurality of supporting units are arranged along the support axial, connection structure sets up between two adjacent supporting units for link together two adjacent supporting units.

2. The combination coronary stent of claim 1, wherein said support element is "W" shaped or "U" shaped.

3. The combined coronary stent of claim 1, wherein the splice structure comprises a first splice structure and a second splice structure, which are respectively disposed at two ends of the main body support structure, and the first splice structure and the second splice structure are mutually matched in shape and size, so that the stent is mutually buckled by the splice structures.

4. A combined coronary stent as claimed in claim 3 wherein the splice structure is comprised of an "O" shape and an inverted "V" shape wherein the inner arc diameter of the inverted "V" shape is greater than 1mm-2mm of the outer arc diameter of the "O" shape to ensure that the "O" shape can snap into the inverted "V" shape to avoid falling out.

5. A modular coronary stent as claimed in claim 3 wherein the splice structure is comprised of "U" and "M" shaped structures, wherein the "U" shaped structure is inserted into a corresponding "U" shaped structure and the "M" shaped structure is inserted into a corresponding "M" shaped structure to complete the splice.

6. A modular coronary stent as claimed in claim 3 wherein the splice structure is comprised of L-shaped and inverted L-shaped structures, wherein the L-shaped and inverted L-shaped structures are combined with one another to complete the splice.

7. A modular coronary stent as claimed in claim 3 wherein the splice structure is further comprised of a combination of an "O" shape and a "C" shape with arcuate hooks, a "T" shape and a "C" shape with right angle hooks or a "J" shape and an inverted "J" shape, each of the two structures being mated to one another to complete the splice.

8. The combined coronary stent of claim 1, wherein said connecting structure is a connecting rod, said connecting rods being evenly distributed along the circumference of said stent; the connecting rod is in an I shape, a U shape or an S shape.

9. A combined coronary stent as claimed in claim 1, wherein the diameter of the stent is in the range of 2mm to 5mm, the length of the stent is 10mm to 20mm, the thickness is 0.05mm to 0.2mm, and the stem width is 0.1mm to 0.3mm.

10. The combined coronary artery stent of claim 1, wherein the stent is made of stainless steel, cobalt chromium, magnesium alloy or zinc alloy, and the stent is prepared by laser engraving, heat treatment and surface chemical polishing.