A sinus stent, a support strip forming mold and a sinus stent manufacturing method

Abstract

The present invention provides a sinus stent, a support strip forming mold and a sinus stent manufacturing method, the sinus stent comprising: a stent body; a first end of the stent body is provided with N support strips uniformly arranged along the circumference of the stent body, each support strip has a first elastic support section close to the stent body and a second elastic support section away from the stent body, the first elastic support section and the second elastic support section are both arc-shaped, the arc top of the first elastic support section faces a first direction, and the arc top of the second elastic support section faces a second direction, the second direction is the direction of the extension line of the central axis of the stent body, and the first direction is opposite to the second direction; N is greater than or equal to 2. Since the present invention can be supported on the sinus cavity and the sinus opening at the same time, the sinus stent can be more firmly supported in the sinus, thereby effectively preventing the sinus stent from falling off with the patient's breathing, and the support effect of the sinus stent can also be better.

Description

Technical Field

[0001] The present invention relates to the technical field of medical products, and in particular to a sinus stent, a support strip forming mold and a sinus stent manufacturing method. Background Art

[0002] The sinuses are multiple air-filled bone cavities around the nasal cavity, all of which have sinus openings that connect to the nasal cavity. Under normal circumstances, the sinuses are unobstructed. However, when rhinitis or nasal membrane swelling occurs due to virus or bacterial invasion or foreign body stimulation, the sinuses will become blocked, causing nasal mucus to stagnate in the sinuses. If this situation is not treated in time, it will cause sinusitis or allergic rhinitis, and even form nasal polyps, which seriously affect health.

[0003] At present, nasal polyps are mainly treated by surgery. After the surgery, in order to prevent the sinuses from sticking together, a sinus stent is often used for support. Existing sinus stents are difficult to firmly support in the sinuses, causing them to easily fall off with the patient's breathing. Summary of the invention

[0004] The embodiments of the present invention provide a sinus stent, a support strip forming mold and a sinus stent manufacturing method to solve the problem that the existing sinus stent is difficult to be firmly supported in the sinus, resulting in it being easily detached with the patient's breathing.

[0005] To solve the above technical problems, the present invention is achieved as follows:

[0006] In a first aspect, an embodiment of the present invention provides a sinus stent, comprising: a stent body;

[0007] The first end of the bracket body is provided with N support bars evenly arranged along the circumference of the bracket body, each support bar has a first elastic support segment close to the bracket body and a second elastic support segment away from the bracket body, the first elastic support segment and the second elastic support segment are both arc-shaped, the arc top of the first elastic support segment faces a first direction, and the arc top of the second elastic support segment faces a second direction, the second direction is the direction of the extension line of the central axis of the bracket body, and the first direction is opposite to the second direction;

[0008] The N is greater than or equal to 2.

[0009] Optionally, a chord length of the first elastic support segment is greater than a chord length of the second elastic support segment, and an arch height of the first elastic support segment is greater than an arch height of the second elastic support segment.

[0010] Optionally, N is an even number;

[0011] A connecting bar is arranged corresponding to every two support bars, and the first end of each connecting bar is connected to one of the two support bars corresponding to the connecting bar, and the second end of each connecting bar passes through the bracket body and is connected to the other of the two support bars corresponding to the connecting bar, and each connecting bar and its corresponding two support bars are an integrally formed structure.

[0012] Optionally, each connecting strip is provided with a corresponding set of perforations;

[0013] Each group of perforations includes a first sub-perforation, a second sub-perforation and a third sub-perforation, the first sub-perforation, the second sub-perforation and the third sub-perforation are all arranged on the bracket body, the central axis of the first sub-perforation and the central axis of the second sub-perforation are both parallel to the central axis of the bracket body, the central axis of the third sub-perforation is perpendicular to the central axis of the bracket body, and the first sub-perforation is connected to the second sub-perforation through the third sub-perforation;

[0014] Each connecting strip is inserted into the first sub-through hole, the second sub-through hole and the third sub-through hole corresponding to it.

[0015] Optionally, the cross-sectional shape of at least one support bar is circular, triangular, trapezoidal, square or rectangular.

[0016] Optionally, a through hole is provided on the bracket body, and the through hole passes through an end surface of the bracket body close to the support bar and an end surface away from the support bar.

[0017] Optionally, the sinus stent is a degradable sinus stent; and / or,

[0018] The outer surface of the stent body and the outer surface of each support bar are coated with a drug layer.

[0019] In a second aspect, an embodiment of the present invention further provides a support bar forming mold for shaping the support bar in the sinus stent provided in the first aspect, comprising:

[0020] A mold body, wherein the outer wall of the mold body is provided with M shaping grooves evenly arranged along the circumference of the mold body, each shaping groove extends from the first end of the mold body to the second end of the mold body, each shaping groove comprises a first groove section close to the first end of the mold body and a second groove section close to the second end of the mold body, the first groove section and the second groove section are both arc-shaped, the arc top of the first groove section faces a third direction, the arc top of the second groove section faces a fourth direction, the fourth direction is the direction toward the central axis of the mold body, and the third direction is opposite to the fourth direction; the M is greater than or equal to 2;

[0021] A fixing ring, which is sleeved on the outer wall of the mold body and located at the connection between the first groove section and the second groove section;

[0022] A bracket body mounting seat, the bracket body mounting seat is connected to the first end of the mold body, the bracket body mounting seat is provided with a bracket body embedding hole, the central axis of the bracket body embedding hole coincides with the central axis of the mold body, and the bracket body mounting seat is provided with an avoidance groove at a portion contacting each shaping groove, and each avoidance groove is respectively communicated with its corresponding shaping groove and is respectively communicated with the bracket body embedding hole;

[0023] A base is connected to the second end of the mold body, and a support strip winding rod is provided at a portion of the base that contacts each shaping groove.

[0024] Optionally, a shearing groove is provided at a connection between the mold body and the base and is arranged along the circumference of the mold body, and the shearing groove is respectively connected to each shaping groove and is respectively in contact with each support bar winding rod.

[0025] In a third aspect, an embodiment of the present invention further provides a method for manufacturing a sinus stent, which is used to manufacture the sinus stent provided in the first aspect by using the support strip forming mold provided in the second aspect, comprising:

[0026] The connecting strip is inserted into the stent body, and the unshaped support strips at both ends of the connecting strip are kept exposed from the stent body to obtain an unshaped stent;

[0027] The unshaped bracket is installed on the support bar forming mold, and the support bar forming mold with the unshaped bracket installed is heated to obtain a shaped bracket;

[0028] Cooling the shaped bracket;

[0029] After the shaped stent is cooled to a preset temperature, the support strips of the shaped stent are cut along the shearing grooves of the support strip forming mold to obtain the sinus stent.

[0030] Thus, in the embodiment of the present invention, since each support bar has two arc-shaped elastic support sections, and the arc tops of the two arc-shaped elastic support sections face opposite directions, one of the elastic support sections can be used to support the sinus cavity, while the other elastic support section can be used to support the sinus opening. Thus, since the sinus cavity and the sinus opening can be supported at the same time, the sinus stent can be more firmly supported in the sinus, thereby effectively preventing the sinus stent from falling off with the patient's breathing, and the support effect of the sinus stent can be better. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0032] Figure 1 is a schematic diagram of the structure of a sinus stent provided by an embodiment of the present invention;

[0033] Figure 2 is a front view of a sinus stent provided by an embodiment of the present invention;

[0034] Figure 3 is a left side view of a sinus stent provided by one embodiment of the present invention;

[0035] Figure 4 is a top view of a sinus stent provided by one embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of a stent body in a sinus stent provided by an embodiment of the present invention;

[0037] Figure 6 is a front view of a stent body in a sinus stent provided by an embodiment of the present invention;

[0038] Figure 7 is a top view of a stent body in a sinus stent provided by an embodiment of the present invention;

[0039] Figure 8 is a DD cross-sectional view of a stent body in a sinus stent provided by an embodiment of the present invention;

[0040] Fig. 9 is a structural schematic diagram of a support bar forming mold provided by an embodiment of the present invention;

[0041] Fig.10 is a front view of a support bar forming mold provided by an embodiment of the present invention;

[0042] Fig.11 is a top view of a support bar forming mold provided by an embodiment of the present invention;

[0043] Fig.12 is a HH cross-sectional view of a support bar forming mold provided by an embodiment of the present invention;

[0044] Fig.13 It is a structural schematic diagram of a sinus stent provided in one embodiment of the present invention when it is installed on a support strip forming mold provided in one embodiment of the present invention;

[0045] Fig.14It is a flow chart of a method for manufacturing a sinus stent provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] like Figures 1 to 8 As shown, an embodiment of the present invention provides a sinus stent 100, comprising: a stent body 11;

[0048] The first end of the bracket body 11 is provided with N support bars 12 evenly arranged along the circumference of the bracket body 11, each support bar 12 has a first elastic support segment AB close to the bracket body 11 and a second elastic support segment BC far away from the bracket body 11, the first elastic support segment AB and the second elastic support segment BC are both arc-shaped, the arc top 121 of the first elastic support segment AB faces the first direction, and the arc top 122 of the second elastic support segment BC faces the second direction, the second direction is the direction of the extension line of the central axis of the bracket body 11, and the first direction is opposite to the second direction;

[0049] N is greater than or equal to 2.

[0050] Among them, the above-mentioned support strips can also be called wires or filaments, which is not limited in the embodiments of the present invention. Each of the above-mentioned support strips 12 can be connected to the outer wall of the bracket body 11. Specifically, each of the above-mentioned support strips 12 can be connected to the bracket body 11 through the end of the first elastic support segment AB of the support strip 12 close to the bracket body 11; the aforementioned connection can be understood as a direct connection or an indirect connection. The above-mentioned first elastic support segment AB and the above-mentioned second elastic support segment BC can be directly connected or indirectly connected through an intermediate piece.

[0051] In order to have a more intuitive explanation of the direction of the arc top 121 of the first elastic support segment AB (i.e., the first direction) and the direction of the arc top 122 of the second elastic support segment BC (i.e., the second direction), please refer to Figure 2 , Figure 2 for Figure 1 A front view of the sinus stent is shown. Figure 2 For example, the rightmost support bar 12 has an arc top 121 of the first elastic support segment AB of the rightmost support bar 12 oriented as shown in FIG. Figure 2 The solid arrow in the figure indicates the direction of the arc top 122 of the second elastic support segment BC of the rightmost support bar 12. Figure 2 The dashed arrow in the figure indicates the direction.

[0052] It should be noted that, since the first elastic support section AB and the second elastic support section BC are both elastic, they can both be elastically deformed under the action of external force, and can both return to their original state after the external force disappears. In this way, before the sinus stent 100 reaches the sinus site, the sinus stent 100 can be compressed by the contraction device so that the sinus stent 100 can be smoothly delivered into the sinus, and after the sinus stent 100 reaches the sinus site, the sinus stent 100 can be naturally expanded to its original state by removing the mounting bracket, thereby finally achieving the support effect on the sinus cavity and the sinus ostium.

[0053] In the embodiment of the present invention, since each support bar has two arc-shaped elastic support sections, and the arc tops of the two arc-shaped elastic support sections face opposite directions, one of the elastic support sections can be used to support the sinus cavity, while the other elastic support section can be used to support the sinus opening. In this way, since the sinus cavity and the sinus opening can be supported at the same time, the sinus stent can be more firmly supported in the sinus, thereby effectively preventing the sinus stent from falling off with the patient's breathing, and the support effect of the sinus stent can be better.

[0054] Optionally, the chord length of the first elastic support segment AB is greater than the chord length of the second elastic support segment BC, and the arch height of the first elastic support segment AB is greater than the arch height of the second elastic support segment BC.

[0055] Since the inner diameter of the sinus cavity is usually larger than that of the sinus ostium, the chord length and arch height of the first elastic support segment are designed to be larger than those of the second elastic support segment, so that the sinus stent can be better suitable for supporting the sinus cavity and the sinus ostium.

[0056] Optionally, the sinus stent 100 is a degradable sinus stent; and / or,

[0057] The outer surface of the stent body 11 and the outer surface of each support bar 12 are coated with a drug layer.

[0058] Among them, the above-mentioned sinus stent 100 is a degradable sinus stent, which may mean that the stent body 11 and each support bar 12 of the sinus stent 100 are degradable. The degradation period of the above-mentioned sinus stent 100 may be 30 to 60 days. The material of the above-mentioned sinus stent 100 may be a polymer such as poly(lactic-co-glycolic acid), poly(PGA), racemic polylactic acid (Poly(D,L-lactide), PDLLA) or polycaprolactone (PCL).

[0059] The drug layer may be a drug layer for preventing sinus adhesion and sinus congestion. The drug layer may be sprayed onto the outer surface of the sinus stent 100 by a spraying process (e.g., ultrasonic spraying); specifically, the drug may be first sprayed onto the outer surface of the sinus stent 100, and then the sprayed sinus stent 100 may be placed in a vacuum drying oven for drying to dry the coating.

[0060] By designing the sinus stent as a degradable sinus stent, the sinus stent can be naturally degraded after a certain period of time, which is not only more environmentally friendly, but also eliminates the need for removing the sinus stent, thereby saving manpower and material resources and reducing patient pain.

[0061] By coating the outer surface of the stent body and the outer surface of each support bar with a drug layer, the sinus stent can release drugs to act on the sinuses while supporting the sinuses, thereby better preventing sinus adhesions and achieving better postoperative recovery of the sinuses.

[0062] Optionally, the cross-sectional shape of at least one support bar 12 is circular, triangular, trapezoidal, square or rectangular.

[0063] The cross-sectional shape of at least one support bar 12 is circular, triangular, trapezoidal, square or rectangular, and the cross-sectional shape of each support bar 12 may be circular, triangular, trapezoidal, square or rectangular. It should be noted that the cross-sectional shape of the support bar 12 may be other shapes in addition to the several shapes listed above, and the embodiment of the present invention does not limit this.

[0064] Since the triangular, trapezoidal, square or rectangular structures have stronger supporting strength and larger surface area, when the cross-sectional shape of the support strip is triangular, trapezoidal, square or rectangular, on the one hand, the supporting strength of the sinus stent can be made stronger, and on the other hand, the external surface area of ​​the sinus stent can be increased. In this way, when a drug layer needs to be applied on the outer surface of the sinus stent, the sinus stent can carry more drugs, thereby increasing the drug release time of the sinus stent and improving the treatment effect.

[0065] Optional, N is an even number;

[0066] A connecting bar 13 is correspondingly arranged for every two support bars 12, and the first end of each connecting bar 13 is connected to one of the two support bars 12 corresponding to the connecting bar 13, and the second end of each connecting bar 13 passes through the bracket body 11 and is connected to the other of the two support bars 12 corresponding to the connecting bar 13, and each connecting bar 13 and its corresponding two support bars 12 are an integrally formed structure.

[0067] In this way, since the connecting strip is passed through the bracket body, the two ends of the connecting strip are respectively connected to the two supporting strips, and each connecting strip and its corresponding two supporting strips are an integrally formed structure, so that the supporting strip and the bracket body can be connected without gluing. In this way, the connection between the supporting strip and the bracket body can be made more stable, and the use of glue can be eliminated, thereby reducing the types of materials used in the sinus stent, and further improving the safety of the sinus stent.

[0068] Optional, such as Figures 5 to 8 As shown, each connecting strip 13 is provided with a corresponding set of perforations;

[0069] Each group of perforations includes a first sub-perforation 111, a second sub-perforation 112 and a third sub-perforation 113, and the first sub-perforation 111, the second sub-perforation 112 and the third sub-perforation 113 are all arranged on the bracket body, the central axis of the first sub-perforation 111 and the central axis of the second sub-perforation 112 are both parallel to the central axis of the bracket body 11, the central axis of the third sub-perforation 113 is perpendicular to the central axis of the bracket body 11, and the first sub-perforation 111 and the second sub-perforation 112 are connected through the third sub-perforation 113;

[0070] Each connecting strip 13 is inserted into the first sub-through hole 111 , the second sub-through hole 112 and the third sub-through hole 113 corresponding thereto.

[0071] The first sub-through hole 111 and the second sub-through hole 112 may be axisymmetric with respect to the central axis of the bracket body 11 , or may not be axisymmetric with respect to the central axis of the bracket body 11 , which is not limited in the embodiment of the present invention.

[0072] In this way, since each connecting strip is inserted into the first sub-through hole, the second sub-through hole and the third sub-through hole corresponding thereto, the connection between the supporting strip and the bracket body can be more stable.

[0073] Optional, such as Figures 5 to 8 As shown, a through hole 114 is provided on the bracket body 11 , and the through hole 114 passes through the end surface of the bracket body 11 close to the support bar 12 and the end surface away from the support bar 12 .

[0074] In this way, by providing through holes on the bracket body that pass through the end face of the bracket body close to the support bar and the end face away from the support bar, the space required for the sinus bracket can be reduced, and the liquid in the sinus can also flow to the nasal cavity through the through holes, thereby making the liquid communicate more smoothly between the sinus and the nasal cavity, and at the same time, the effect of weight reduction can be achieved.

[0075] like Figures 9 to 13As shown, an embodiment of the present invention further provides a support bar forming mold 200, which is used to shape the support bar 12 in the sinus stent 100 in the above embodiment, including:

[0076] The mold body 21 has an outer wall provided with M shaping grooves 211 evenly arranged along the circumference of the mold body 21, each shaping groove 211 extends from the first end of the mold body 21 to the second end of the mold body 21, each shaping groove 211 includes a first groove section EF close to the first end of the mold body 21 and a second groove section FG close to the second end of the mold body 21, the first groove section EF and the second groove section FG are both arc-shaped, the arc top 2111 of the first groove section EF faces the third direction, the arc top 2112 of the second groove section FG faces the fourth direction, the fourth direction is the direction toward the central axis of the mold body 21, and the third direction is opposite to the fourth direction; M is greater than or equal to 2;

[0077] A fixing ring 22, which is sleeved on the outer wall of the mold body 21 and located at the connection between the first groove section EF and the second groove section FG;

[0078] A bracket body mounting seat 23, the bracket body mounting seat 23 is connected to the first end of the mold body 21, a bracket body embedding hole 231 is provided on the bracket body mounting seat 23, the central axis of the bracket body embedding hole 231 coincides with the central axis of the mold body 21, and a portion of the bracket body mounting seat 23 that contacts each shaping groove 211 is provided with an avoidance groove 232, and each avoidance groove 232 is respectively communicated with its corresponding shaping groove 211 and is respectively communicated with the bracket body embedding hole 231;

[0079] The base 24 is connected to the second end of the mold body 21 , and a support strip winding rod 241 is provided at a portion of the base 24 that contacts each shaping groove 211 .

[0080] The middle part of the mold body 21 may be provided with a weight-reducing hole 212, and the weight-reducing hole 212 may be connected to the bracket body embedding hole 231. The shaping groove 211 may be used to embed the support bar; specifically, the first groove section EF may be the first elastic support section AB for embedding the support bar 12, and the second groove section may be the second elastic support section BC for embedding the support bar 12. The fixing ring 22 may be used to clamp the support bar 12 so that the first elastic support section AB and the second elastic support section BC of the support bar 12 fit with the shaping groove 211. The bracket body embedding hole 231 may be used to embed the bracket body 11; the avoidance groove 232 may be used for the support bar 12 to pass through so that the support bar 12 can be smoothly embedded in the shaping groove 211. The support bar winding rod 241 may be used for winding the end of the support bar 12 so as to tighten the support bar 12 so that the support bar 12 fits completely with the shaping groove 211.

[0081] In order to have a more intuitive explanation of the direction of the arc top 2111 of the first slot segment EF (i.e., the third direction) and the direction of the arc top 2112 of the second slot segment FG (i.e., the fourth direction), please refer to Fig.12 , Fig.12 for Fig. 9 HH cross-sectional view of the sinus stent shown in Fig.12 For example, the rightmost shaping groove 211 has the top 2111 of the first groove segment EF of the rightmost shaping groove 211 facing in the direction as shown in FIG. Fig.12 The solid arrow in FIG. 1 indicates the direction of the arc top 2112 of the second groove segment FG of the rightmost shaping groove 211. Fig.12 The dashed arrow in the figure indicates the direction.

[0082] When the support bar forming mold 200 in the embodiment of the present invention is used to shape the support bar 12 in the sinus stent 100 in the above embodiment, the sinus stent 100 needs to be installed on the support bar forming mold 200 in the embodiment of the present invention. The specific installation steps of the sinus stent 100 on the support bar forming mold 200 in the embodiment of the present invention can be: first, embed the stent body 11 in the stent body embedding hole 231 of the stent body mounting seat 23; then, pass the support bar 12 through the avoidance groove 232 and embed it in the shaping groove 211, and then tighten the support bar 12 so that the support bar 12 is completely fitted with the shaping groove 211, and then wrap the end of the support bar 12 around the support bar winding rod 241. Please refer to the structural schematic diagram of the sinus stent 100 when it is installed on the support bar forming mold 200 in the embodiment of the present invention. Fig.13 .

[0083] The support strip forming mold in the embodiment of the present invention can shape the support strip in the sinus stent in the aforementioned embodiment so that the first elastic support segment and the second elastic support segment of the support strip in the sinus stent in the aforementioned embodiment are both arc-shaped, and the arc top of the first elastic support segment is in the opposite direction to the arc top of the second elastic support segment, thereby enabling the sinus stent to be more firmly supported in the sinus, and thus effectively preventing the sinus stent from falling off with the patient's breathing, and also enabling the supporting effect of the sinus stent to be better.

[0084] Optionally, a shearing groove 213 is provided at the connection between the mold body 21 and the base 24 along the circumference of the mold body 21 , and the shearing groove 213 is respectively connected to each shaping groove 211 and is respectively in contact with each support strip winding rod 241 .

[0085] The shear groove 213 may be used to cut the support strip 12 so that the shaped sinus stent 100 can be removed from the support strip forming mold 200 .

[0086] In this way, by providing the shearing groove, the shearing of the support strip can be made easier and more convenient.

[0087] An embodiment of the present invention further provides a method for manufacturing a sinus stent, which is used to manufacture the sinus stent 100 in some implementations of the above embodiment by using the support strip forming mold 200 in the above embodiment, comprising:

[0088] Step 101, inserting a connecting strip into the stent body, and keeping the unshaped support strips at both ends of the connecting strip exposed from the stent body, to obtain an unshaped stent;

[0089] Step 102, installing the unshaped bracket on the support bar forming mold 200, and heating the support bar forming mold 200 with the unshaped bracket installed to obtain a shaped bracket;

[0090] Step 103, cooling the shaped bracket;

[0091] Step 104 , after the shaped stent is cooled to a preset temperature, the support strips of the shaped stent are cut along the shear grooves of the support strip forming mold to obtain the sinus stent 100 .

[0092] The connecting strip and the unshaped support strips at both ends thereof may be an integrally formed structure. The heating treatment of the support strip forming mold 200 with the unshaped support installed thereon may be performed by placing the support strip forming mold 200 with the unshaped support installed thereon in an oven for heating treatment. The cooling treatment of the shaped support may be performed by cooling the shaped support with a cooling fan.

[0093] The embodiments of the present invention can manufacture the sinus stents in some implementation methods of the above embodiments through the support strip forming mold in the above embodiments, so that the sinus stents can be more firmly supported in the sinuses, and thus can effectively prevent the sinus stents from falling off with the patient's breathing, and can also make the supporting effect of the sinus stent better.

[0094] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A sinus stent, characterized in that: include: The bracket body; The first end of the bracket body is provided with N support bars evenly arranged along the circumference of the bracket body, each support bar has a first elastic support segment close to the bracket body and a second elastic support segment away from the bracket body, the first elastic support segment and the second elastic support segment are both arc-shaped, the arc top of the first elastic support segment faces a first direction, and the arc top of the second elastic support segment faces a second direction, the second direction is the direction of the extension line of the central axis of the bracket body, and the first direction is opposite to the second direction; Each connecting strip is provided with a group of perforations correspondingly; each group of perforations includes a first sub-perforation, a second sub-perforation and a third sub-perforation, the first sub-perforation, the second sub-perforation and the third sub-perforation are all provided on the bracket body, the central axis of the first sub-perforation and the central axis of the second sub-perforation are both parallel to the central axis of the bracket body, the central axis of the third sub-perforation is perpendicular to the central axis of the bracket body, and the first sub-perforation is connected to the second sub-perforation through the third sub-perforation; each connecting strip is provided in the first sub-perforation, the second sub-perforation and the third sub-perforation corresponding thereto; N is greater than or equal to 2, and N is an even number; A connecting bar is provided corresponding to every two supporting bars, a first end of each connecting bar is connected to one of the two supporting bars corresponding to the connecting bar, a second end of each connecting bar passes through the bracket body and is connected to the other of the two supporting bars corresponding to the connecting bar, and each connecting bar and its two corresponding supporting bars are an integrally formed structure; The chord length of the first elastic support segment is greater than the chord length of the second elastic support segment, and the arch height of the first elastic support segment is greater than the arch height of the second elastic support segment.

2. The sinus stent according to claim 1, characterized in that: The cross-sectional shape of at least one supporting bar is circular, triangular, trapezoidal, square or rectangular.

3. The sinus stent according to claim 1, characterized in that: The bracket body is provided with a through hole, and the through hole passes through the end surface of the bracket body close to the support bar and the end surface away from the support bar.

4. The sinus stent according to any one of claims 1 to 3, characterized in that: The sinus stent is a degradable sinus stent; and / or, The outer surface of the stent body and the outer surface of each support bar are coated with a drug layer.

5. A support strip forming mold, used for shaping the support strip in the sinus stent according to any one of claims 1 to 4, characterized in that: include: A mold body, wherein the outer wall of the mold body is provided with M shaping grooves evenly arranged along the circumference of the mold body, each shaping groove extends from the first end of the mold body to the second end of the mold body, each shaping groove comprises a first groove section close to the first end of the mold body and a second groove section close to the second end of the mold body, the first groove section and the second groove section are both arc-shaped, the arc top of the first groove section faces a third direction, the arc top of the second groove section faces a fourth direction, the fourth direction is the direction toward the central axis of the mold body, and the third direction is opposite to the fourth direction; the M is greater than or equal to 2; A fixing ring, which is sleeved on the outer wall of the mold body and located at the connection between the first groove section and the second groove section; A bracket body mounting seat, the bracket body mounting seat is connected to the first end of the mold body, the bracket body mounting seat is provided with a bracket body embedding hole, the central axis of the bracket body embedding hole coincides with the central axis of the mold body, and the bracket body mounting seat is provided with an avoidance groove at a portion contacting each shaping groove, and each avoidance groove is respectively communicated with its corresponding shaping groove and is respectively communicated with the bracket body embedding hole; A base is connected to the second end of the mold body, and a support strip winding rod is provided at a portion of the base that contacts each shaping groove.

6. The support strip forming mold according to claim 5, characterized in that: A shearing groove is arranged along the circumference of the mold body at the connection between the mold body and the base, and the shearing groove is respectively communicated with each shaping groove and is respectively in contact with each support strip winding rod.

7. A method for manufacturing a sinus stent, for manufacturing the sinus stent according to claim 1 by using the support strip forming mold according to claim 5, characterized in that: include: The connecting strip is inserted into the stent body, and the unshaped support strips at both ends of the connecting strip are kept exposed from the stent body to obtain an unshaped stent; The unshaped bracket is installed on the support bar forming mold, and the support bar forming mold with the unshaped bracket installed is heated to obtain a shaped bracket; Cooling the shaped bracket; After the shaped stent is cooled to a preset temperature, the support strips of the shaped stent are cut along the shearing grooves of the support strip forming mold to obtain the sinus stent.

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