A stent bundling structure, stent bundling method and implanter containing the structure

Abstract

The present invention discloses a stent bundling structure, a stent bundling method and an inserter including the structure, comprising a Y-shaped stent and two release lines connected to two branches of the Y-shaped stent in one-to-one correspondence, the two branches are tightened by a plurality of snap-fit ​​structures respectively, each snap-fit ​​structure has a release end and a tightening end, the release ends of the snap-fit ​​structures on the same branch are connected to the same release line, so that the snap-fit ​​structures on the same branch are released respectively. The present invention tightens the two branches of the Y-shaped stent by a plurality of snap-fit ​​structures, each snap-fit ​​structure is released by its own release end, and when the release line is pulled, each snap-fit ​​structure is loosened respectively, and it is not necessary to pull a long distance, and the release speed is fast.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a stent binding structure, a stent binding method and an implanter comprising the structure. Background Art

[0002] The Y-shaped stent fully conforms to the anatomical structure of the tracheal carina; the original main body and two-branch design ensure that the stent fits the tracheal carina perfectly and will not shift or deform, which is beneficial to breathing and the discharge of sputum; the stent coating can reduce irritation and block fistulas, keeping the airway open for a long time; the Y-shaped design of the Y-shaped stent can complete the treatment of multiple lesions in the carina at one time, reduce the incidence of surgical complications, reduce the difficulty of surgery, and reduce costs.

[0003] The existing Y-shaped stent has branches that are wrapped in a single loose knot, so there are the following defects: (1) Generally, it is wrapped 15-20 times, which makes the entire line very long. The doctor needs to pull it out completely to complete the stent release, and the release speed is slow. (2) Since the stent is tied in a ring-by-ring manner, the operation is complicated. When one of the rings is tight, it often leads to subsequent release difficulties, and the requirements for production line operators are also very high. (3) There are many release winding circles, and a certain amount of force is required for release. During the release process, the dragging of the release line can easily cause lateral dislocation of the stent and scratches on human tissue. During the release, only the proximal release can be performed first, and then gradually to the distal stent, which may also cause front and back dislocation after release.

[0004] The inserter is an auxiliary device used to insert a Y-shaped stent into the human body. During the insertion process of the existing Y-shaped stent, the left and right branches cannot be directly distinguished. As a result, during the insertion process of the inserter, before the stent is released, the inserter needs to be manually adjusted (rotated) under X-ray so that the left and right branches can correctly enter the corresponding bronchi. During the adjustment process, the stent is prone to scratch the inner wall tissue of the trachea, causing certain damage. Summary of the invention

[0005] In order to solve the technical problems in the prior art that the Y-shaped stent in the implanter is wound with a single wire slipknot, has a slow release speed and is easily dislocated during release, the present invention provides a stent bundling structure, a stent bundling method and an implanter including the structure to solve the above problems.

[0006] The present invention proposes a bracket binding structure, including a Y-shaped bracket and two release lines connected to two branches of the Y-shaped bracket in a one-to-one correspondence. The two branches are tightened by multiple snap-lock structures respectively, each snap-lock structure has a releasing end and a tightening end, and the releasing ends of the snap-lock structures on the same branch are connected to the same release line so that the snap-lock structures on the same branch can be released respectively.

[0007] Furthermore, each of the snap structures is wound around the branch 1 to 3 times.

[0008] Furthermore, the line between the release end and the knotted part of the snap-lock structure is taken as the end connecting line, and the end connecting lines of multiple snap-lock structures on the same branch are equal in length, or on the same branch, the end connecting line length of the snap-lock structure gradually decreases from the proximal end of the branch to the distal end of the branch.

[0009] Furthermore, the snap-on structure is formed by winding a binding wire.

[0010] Furthermore, a developing ring is provided in the main body of the Y-shaped bracket, and the developing ring has two inner tube holes and two release line holes which penetrate axially.

[0011] Furthermore, the inner walls of the two inner tube holes are printed with different patterns or colors.

[0012] The present invention further proposes a stent binding method, which adopts the stent binding structure described above, wherein the winding method of the snap structure includes the following steps:

[0013] S1: Fold a binding wire in half to form a tightening section and a releasing section.

[0014] S2: lift the middle part of the tightening section and press it on the top of the releasing section, and form an initial loop on the other side of the releasing section, form two ends on one side of the initial loop, and form an end loop for winding the branch on the other side of the initial loop.

[0015] S3: Pass the end of the release section in step S2 over the initial ring buckle and out from the bottom of the end ring buckle.

[0016] S4: Lift the middle part of the end of the release section in step S3 to form a secondary loop, and pass the secondary loop through the initial loop.

[0017] S5: Straighten the end of the tightening section so that the secondary loop is tightened and a knot is formed between the secondary loop and the end of the release section.

[0018] The present invention also proposes an inserter, which adopts the above-mentioned stent bundling method. The inserter also includes an inner tube, an outer tube, a middle tube, a front handle connected to the outer tube, and a rear handle connected to the middle tube. The middle tube is located inside the outer tube, the inner tube passes through the middle tube, and the two inner tubes pass through the two branches of the Y-shaped stent in turn, and the Y-shaped stent is located at the proximal end of the middle tube. The release line passes through the middle tube and the rear handle and is connected to the pull ring in a one-to-one correspondence.

[0019] The beneficial effects of the present invention are:

[0020] (1) In the present invention, the two branches of the Y-shaped bracket are tightened by a plurality of snap-fit ​​structures, and each snap-fit ​​structure is released by its own release end. When the release line is pulled, each snap-fit ​​structure is loosened separately, and there is no need to pull a long distance, and the release speed is fast.

[0021] (2) The present invention can control the release order of multiple hook structures on each branch by adjusting the length of the end connecting line of each hook structure, and the hook structure will not be dragged during the release process, effectively avoiding the release dislocation of the bracket.

[0022] (3) In the present invention, different patterns or colors are printed on the inner walls of the two inner tube holes in the developing ring, which makes it easy for doctors to identify the corresponding left and right branch positions without misalignment. Doctors do not need to perform rotation adjustment during the release process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 is a schematic diagram of a specific implementation of the present invention when the bracket is in a binding state;

[0025] Figure 2 yes Figure 1 The enlarged image at a in the middle;

[0026] Figure 3 is a schematic diagram of a specific implementation of the present invention when the bracket is in a binding state;

[0027] Figure 4 It is a partial schematic diagram of the assembly of the stent binding structure and the inserter of the present invention;

[0028] Figure 5 It is a schematic diagram of the assembly of the developing ring and the inner tube in the present invention;

[0029] Figure 6 is a state diagram of step S1 in the bracket binding method of the present invention;

[0030] Figure 7 is a state diagram of step S2 in the bracket binding method of the present invention;

[0031] Figure 8 is a state diagram of step S3 in the bracket binding method of the present invention;

[0032] Fig. 9 is a state diagram of step S4 in the bracket binding method of the present invention;

[0033] Fig.10 is a front view of the inserter of the present invention;

[0034] Fig.11 yes Fig.10DD section view;

[0035] Fig.12 yes Fig.11 The enlarged image at point b in the middle;

[0036] Fig.13 It is a schematic diagram of the stent in the present invention when it is in a released state.

[0037] In the figure, 1. Y-shaped bracket, 101. main body, 102. branch, 2. release line, 3. snap-fit ​​structure, 301. release end, 302. tightening end, 4. binding line, 5. end connecting line, 6. developing ring, 601. inner tube hole, 602. release line hole, 7. tightening section, 8. release section, 9. initial buckle, 10. end buckle, 11. secondary buckle, 12. knotting part, 14. inner tube, 15. outer tube, 16. middle tube, 17. front handle, 18. rear handle, 19. pull ring. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] In this embodiment, the term "proximal end" indicating the direction refers to the end close to the damaged tissue during surgery, and the term "distal end" refers to the end far from the damaged tissue during surgery.

[0040] A bracket bundling structure includes a Y-shaped bracket 1 and two release lines 2 connected to two branches 102 of the Y-shaped bracket 1 in a one-to-one correspondence. The two branches 102 are tightened by multiple snap-fit ​​structures 3 respectively. Each snap-fit ​​structure 3 has a release end 301 and a tightening end 302. The release end 301 of the snap-fit ​​structure 3 on the same branch 102 is connected to the same release line 2, so that the snap-fit ​​structures 3 on the same branch 102 are released respectively.

[0041] The branch 102 of the Y-shaped bracket 1 has a plurality of snap structures 3, each snap structure 3 uses a binding line 4, and then is uniformly connected to the release line 2. The release end 301 of the snap structure 3 and the release line 2 can be fixed by knotting, or fixed with glue. When the release line 2 is pulled, each binding line 4 is subjected to force separately. Compared with the prior art, each snap structure 3 in the present invention is untied separately, and there is no need to open each snap knot in turn, so as to avoid the difficulty of releasing the subsequent snap structures 3 when one of the snap structures 3 is tight, thereby improving the release speed. In addition, since it is not necessary to release each winding circle step by step, the binding line 4 will not be dragged during the release process, and the bracket release will not be misplaced, thereby improving the accuracy of the release position.

[0042] The hook structure 3 is wound around the branch 102 and then tied into a knot to achieve the bundling of the branch 102. Pulling the tightening end 302 can tighten the hook structure 3, and pulling the release end 301 can loosen the hook structure 3. When the number of turns of the binding line 4 wound around the branch 102 is fewer, the force required to pull out the binding line 4 is smaller, and the influence of the pulling force on the bracket is smaller. For this reason, each hook structure 3 is preferably wound around the branch 102 1 to 3 times.

[0043] Embodiment 1

[0044] A bracket bundling structure, such as Figure 1 and Figure 2 As shown, a Y-shaped stent 1 is composed of a main body 101 and two branches 102. Each branch 102 is respectively bound and tightened by a plurality of snap structures 3 formed by a plurality of binding wires 4. The specific number of snap structures 3 on each branch 102 is determined by the actual length of each branch 102. The binding wires 4 need to bind each branch 102 tightly so that the stent branch 102 is in an unopened state, so that it is not easy to rub against human tissue when entering the human body. Therefore, it should be avoided that too few snap structures 3 and uneven binding cause partial bulging of the branch 102. The number of snap structures 3 for each stent branch 102 should be at least 3, and the three snap structures 3 are respectively located at the proximal end, the middle, and the distal end of the branch 102. In this embodiment, three snap-knot structures 3 formed by three binding lines 4 on each branch 102 are taken as an example. The release ends 301 of the three binding lines 4 on the same side are commonly connected to a release line 2. The binding line 4 is wrapped around the branch 102 three times and then tied into a snap knot. When the release line 2 is pulled, the snap-knot structure 3 is untied to immediately release the bracket part where the snap-knot structure 3 is located. The other snap-knot structures 3 are also untied one by one without queuing up in sequence.

[0045] The line between the release end 301 and the knotting part 12 of the snap structure 3 is the terminal connection line 5, that is, Figure 2 The length of the binding line 4 between the midpoint A and the point B, in this embodiment, on the same branch 102, from the proximal end of the branch 102 to the distal end of the branch 102, the length of the terminal connection line 5 of the snap structure 3 gradually decreases. Figure 2 As shown, the Y-shaped bracket 1 is in a binding state, and the branches 102 are bound and contracted. The lengths of the end connection lines 5 of the three snap-lock structures 3 on each branch 102 increase from left to right. In the process of pulling the release line 2, the binding line 4 is subjected to the tension transmitted by the release line 2, and the end connection line 5 is straightened to drive the snap-lock structure 3 to be released. Since the leftmost end connection line 5 is the longest, it is first subjected to tension, thereby pulling the leftmost snap-lock structure 3 to open, and the three snap-lock structures 3 are opened from left to right in turn (i.e., released from the distal end to the proximal end), and the branch 102 is no longer subjected to the binding force, thereby achieving the expansion of the branch 102 (as shown in FIG. 1 ). Fig.13As shown), it fits with the human tissue, and the inserter can be withdrawn smoothly.

[0046] The existing binding method is to release from the proximal end, which will push the stent onto the trachea and cause the stent to shift. The present invention first releases the distal end of branch 102, and then the part of the stent pops up to fix the Y-shaped stent 1 in the human body. Then, no reaction force will be generated when the proximal end of branch 102 is released.

[0047] A developing ring 6 is usually provided inside the main body 101 of the Y-shaped bracket 1 for identifying the position of the Y-shaped bracket 1 .

[0048] Embodiment 2

[0049] In this embodiment, the end connection lines 5 of the plurality of snap structures 3 on the same branch 102 are of equal length. Figure 3 As shown, the end connecting lines 5 of the three snap-lock structures 3 on each branch 102 are of equal length. In the process of pulling the release line 2, under the action of force, the three binding lines 4 are successively subjected to the pulling force of the release line 2 from left to right, thereby pulling the snap-lock structures 3 to open. The three snap-lock structures 3 are opened at the same time, and the branch 102 is no longer subjected to the binding force, thereby achieving the expansion of the branch 102 and fitting with the human tissue, and the inserter can be smoothly withdrawn.

[0050] Embodiment 3

[0051] On the basis of Example 1 or Example 2, Figure 5 As shown, the developing ring 6 has two axially penetrating inner tube holes 601 and two release line holes 602. The inner tube holes 601 are used for the two inner tubes 14 of the inserter to pass through, and the release line holes 602 are used for the release line 2 to pass through. The inner tube holes 601 correspond to the inner tubes 14 one by one, which can avoid the misalignment of the left and right branches 102. In a further design, the inner walls of the two inner tube holes 601 are printed with different patterns or colors to facilitate doctors to identify the corresponding positions of the left and right branches 102.

[0052] Embodiment 4

[0053] A stent binding method, the method adopts the stent binding structure described above, wherein the winding method of the snap structure 3 includes the following steps:

[0054] S1: Fold a binding line 4 in half to form a tightening section 7 and a releasing section 8, the end of the tightening section 7 is a tightening end 302, and the end of the releasing section 8 is a releasing end 301, such as Figure 6 shown.

[0055] S2: The middle part of the tightening section 7 is lifted and pressed on the top of the release section 8, and an initial loop 9 is formed on the other side of the release section 8, two ends are formed on one side of the initial loop 9, and an end loop 10 for winding the branch 102 is formed on the other side of the initial loop 9, such as Figure 7 shown.

[0056] S3: Pass the end of the release section 8 in step S2 from above the initial ring buckle 9 and then pass from below the end ring buckle 10, as shown in FIG. Figure 8 shown.

[0057] S4: Lift the middle part of the end of the release section 8 in step S3 to form a secondary loop 11, and pass the secondary loop 11 through the initial loop 9, such as Fig. 9 shown.

[0058] S5: straighten the end of the tightening section 7, so that the secondary loop 11 is tightened, and a knotted portion 12 is formed between the secondary loop 11 and the end of the release section 8. Fig. 9 As shown, by pulling the tightening end 302 and a line below the end loop 10 in the figure, the snap-lock structure 3 can be completely tightened, and by pulling the release end 301, the snap-lock structure 3 can be immediately loosened.

[0059] The traditional slipknot structure ensures the tightening effect by connecting multiple slipknots. If only one slipknot is used, it is easy to fall apart. The knotting part 12 of the slipknot structure of this embodiment is wrapped with two layers, so the tightening effect is better, and it can be tightened even with only one slipknot.

[0060] The knotting method of this embodiment is simple, which reduces the difficulty of assembly for personnel. At the same time, since the knotting difficulty is reduced, the release force is controllable, which effectively improves the reliability of the product.

[0061] Embodiment 5

[0062] An inserter, such as Figure 10-12 As shown, the inserter adopts the above stent bundling method, and the inserter also includes an inner tube 14, an outer tube 15, a middle tube 16, a front handle 17 connected to the outer tube 15, and a rear handle 18 connected to the middle tube 16. The middle tube 16 is located inside the outer tube 15, the inner tube 14 passes through the middle tube 16, and the two inner tubes 14 pass through the two branches 102 of the Y-shaped stent 1 in sequence, and the Y-shaped stent 1 is located at the proximal end of the middle tube 16. The release line 2 passes through the middle tube 16 and the rear handle 18 and is connected to the pull ring 19 one by one.

[0063] The pull ring 19 controls the release of the Y-shaped bracket 1 through the release line 2; two pull rings 19 are provided, which respectively control the two release lines 2. The rear handle 18 is used to control the forward and backward movement of the outer tube 15, and the front handle 17 is used to control the forward and backward movement of the middle tube 16. When the middle tube 16 is moved forward, the Y-shaped bracket 1 can be pushed forward, and when the middle tube 16 is pulled backward, the Y-shaped bracket 1 can be driven to move backward. If the release position of the Y-shaped bracket 1 is lower than the predetermined position but the distance is longer or higher than the predetermined release position, the front handle 17 can be pushed forward to make the Y-shaped bracket 1 located in the outer tube 15, and the position can be adjusted again before release. By adjusting the length of the terminal connecting line 5, the opening order of the snap structure 3 can be controlled, so that different parts of the bracket can expand in sequence.

[0064] When the end connecting lines 5 of each snap-lock structure 3 on the same branch 102 are of the same length, each snap-lock structure 3 opens simultaneously when pulled.

[0065] When the lengths of the end connecting lines 5 of each snap-fit ​​structure 3 on the same branch 102 are different, the end connecting line 5 at the proximal end is long, and the end connecting line 5 at the distal end is short. When pulling, the snap-fit ​​structure 3 at the distal end is opened first, the distal end expands, and is supported, and each part of the stent is released in sequence from far to near.

[0066] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0067] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0068] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0069] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A bracket bundling structure, characterized in that: The invention comprises a Y-shaped bracket (1) and two release lines (2) connected to two branches (102) of the Y-shaped bracket (1) in a one-to-one correspondence. The two branches (102) are tightened respectively by a plurality of snap-lock structures (3). Each snap-lock structure (3) has a release end (301) and a tightening end (302). The release ends (301) of the snap-lock structures (3) on the same branch (102) are connected to the same release line (2) so that the snap-lock structures (3) on the same branch (102) are released respectively. The line between the release end (301) and the knotting part (12) of the snap-lock structure (3) is the end connection line (5). Then, the end connection lines (5) of the plurality of snap-lock structures (3) on the same branch (102) are equal in length, or on the same branch (102), the end connection lines (5) of the snap-lock structures (3) gradually decrease in length from the proximal end of the branch (102) to the distal end of the branch (102).

2. The bracket binding structure according to claim 1, characterized in that: Each of the snap-button structures (3) is wound around the branch (102) 1 to 3 times.

3. The bracket binding structure according to claim 1, characterized in that: The snap-on structure (3) is formed by winding a binding wire (4).

4. The bracket binding structure according to claim 1, characterized in that: A developing ring (6) is provided inside the main body (101) of the Y-shaped bracket (1), and the developing ring (6) has two inner tube holes (601) and two release line holes (602) that penetrate axially.

5. The bracket binding structure according to claim 4, characterized in that: The inner walls of the two inner tube holes (601) are printed with different patterns or colors.

6. A bracket bundling method, characterized in that: The method adopts the bracket binding structure according to any one of claims 1 to 5, wherein the winding method of the snap structure (3) includes the following steps: S1: folding a binding wire (4) in half to form a tightening section (7) and a releasing section (8); S2: The middle part of the tightening section (7) is lifted and pressed on the top of the release section (8), and an initial loop (9) is formed on the other side of the release section (8), two ends are formed on one side of the initial loop (9), and an end loop (10) for winding the branch (102) is formed on the other side of the initial loop (9); S3: Passing the end of the release section (8) in step S2 from above the initial ring buckle (9) and out from below the end ring buckle (10); S4: lifting the middle part of the end of the release section (8) in step S3 to form a secondary ring buckle (11), and passing the secondary ring buckle (11) through the initial ring buckle (9); S5: straightening the end of the tightening section (7) so that the secondary ring buckle (11) is tightened and a knotting portion (12) is formed between the secondary ring buckle (11) and the end of the release section (8).

7. An inserter, characterized in that: The inserter adopts the stent bundling method according to claim 6, and the inserter also includes an inner tube (14), an outer tube (15), a middle tube (16), a front handle (17) connected to the outer tube (15), and a rear handle (18) connected to the middle tube (16), wherein the middle tube (16) is located inside the outer tube (15), the inner tube (14) passes through the middle tube (16), the two inner tubes (14) pass through the two branches (102) of the Y-shaped stent (1) in sequence, and the Y-shaped stent (1) is located at the proximal end of the middle tube (16), and the release line (2) passes through the middle tube (16) and the rear handle (18) and is connected to the pull ring (19) in a one-to-one correspondence.

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