Bracket system

Abstract

The present invention discloses a stent system, which belongs to the field of medical device technology. It mainly includes a stent, a recovery line and a central tube. The stent is provided with a blocking portion. The recovery line includes an open-loop insertion section and two escape sections respectively located at the two ends of the insertion section. The insertion section surrounds the blocking portion along the circumference of the stent. The central tube is used to extend into the stent. An inlet is provided on the central tube. The inlet and the insertion section in the recovery line are in the same radial plane on the stent. The escape section penetrates into the central tube through the inlet, so that when the escape section is gradually collected into the central tube through the inlet, the insertion section gradually shrinks and decreases. The contraction of the insertion section drives the blocking portion to shrink radially inward. The stent system of the present invention can prevent the stent from shifting due to dragging when the recovery line is pulled to shrink the stent.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a bracket system. Background Art

[0002] Treatment using stents has become widely popular. For example, stents are placed in narrowed or blocked areas in tubular organs such as the bile duct, urethra, trachea, blood vessels, esophagus, and body cavities to expand the narrowed or blocked areas so that bile, blood, etc. can flow more easily, or stents are placed in areas where aneurysms have occurred to prevent them from rupture.

[0003] Since the stent is positioned and placed in the affected part of the body tissue, it may be misplaced sometimes. An existing stent adopts the following structure: a trumpet-shaped expansion part or a dumbbell-shaped expansion blocking part is set at the end of the stent, so that the blocking part is in close contact with the inner wall of the body tissue, and the misplacement is suppressed by the anchoring effect. In order to retract the blocking part after the stent is released, the existing stent is provided with a recovery line on the stent while the position of the stent is adjusted twice. The purpose of retracting the blocking part is achieved by dragging the recovery line. However, the stent is easily forced to move in the process of dragging the recovery line, and the movement of the stent is easy to cause damage to the inner wall of the tissue.

[0004] Therefore, it is necessary to provide a support system to solve the above problems. Summary of the invention

[0005] Based on the above problems existing in the prior art, an object of an embodiment of the present invention is to provide a stent system, which can prevent the stent from being displaced due to dragging when a recovery line is pulled to retract the stent.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a stent system, including a stent, a recovery line and a central tube, the stent is provided with a blocking portion, the recovery line includes an open-loop insertion section and two escape sections respectively located at the two ends of the insertion section, the insertion section surrounds the blocking portion along the circumference of the stent, the central tube is used to extend into the stent, an inlet is opened on the central tube, the inlet and the insertion section in the recovery line are in the same radial plane on the stent, the escape section penetrates into the central tube through the inlet, so that when the escape section is gradually retracted into the central tube through the inlet, the insertion section gradually shrinks and decreases, and the contraction of the insertion section drives the blocking portion to shrink radially inward.

[0007] Furthermore, the recycling line is provided with one.

[0008] Furthermore, the recovery lines are provided in plurality, and the insertion sections of the plurality of recovery lines are distributed on the blocking portion of the support at intervals along the axial direction of the support, and the escape sections of the plurality of recovery lines are all inserted into the channel opened in the central tube.

[0009] Furthermore, a plurality of channels are arranged at intervals in the central tube, and the plurality of channels are distributed on the central tube along the circumference of the central tube. An inlet is arranged on the central tube corresponding to each channel, and the inlet is arranged at one end of the central tube corresponding to the bracket and / or on the side wall of the central tube, and the inlet is communicated with the corresponding channel.

[0010] Furthermore, two recovery lines are provided, two channels are provided corresponding to the recovery lines, and two inlets are provided, and the two inlets are respectively provided at one end of the central tube corresponding to the bracket and on the side wall of the central tube, or both inlets are provided on the side wall of the central tube.

[0011] Furthermore, there are multiple channels in the central tube at intervals, and the channels include a main channel arranged at the axis of the central tube and multiple branch channels arranged around the main channel. The central tube is provided with an inlet corresponding to each of the channels, and the inlet is arranged at one end of the central tube corresponding to the bracket and / or on the side wall of the central tube, and the inlet is communicated with the corresponding channel.

[0012] Furthermore, four recovery lines are provided, four channels are provided corresponding to the recovery lines, the channels include a main channel provided at the axis of the central tube and three branch channels provided around the main channel, four inlets are provided, the inlets are respectively provided at one end portion of the central tube corresponding to the bracket and on the side wall of the central tube, or the inlets are all provided on the side wall of the central tube.

[0013] Furthermore, a membrane is also provided on the support.

[0014] Furthermore, the blocking portion is a cylindrical structure formed by the bracket protruding outward in the radial direction.

[0015] Furthermore, the stent system also includes an outer tube, the central tube is inserted into the outer tube, and the inner cavity of the outer tube is used to place the contracted stent so that when the outer tube slides axially relative to the central tube, the stent can be disengaged from the outer tube to be released and opened.

[0016] The beneficial effect of the present invention is as follows: the stent system provided by the present invention, wherein the recovery line includes an open-loop insertion section and two disengagement sections respectively located at the two ends of the insertion section, the insertion section surrounds the blocking portion along the circumference of the stent, the central tube is used to extend into the stent, an inlet is opened on the central tube, the inlet and the insertion section in the recovery line are on the same radial plane of the stent, the disengagement section penetrates into the central tube from the inlet, so that when the disengagement section is gradually received into the central tube through the inlet, the insertion section gradually shrinks and decreases, and the contraction of the insertion section drives the blocking portion to shrink radially inward and detach from the inner wall of the tissue, so that in the process of pulling the disengagement section in the recovery line through the inlet to receive the central tube, since the insertion section on the stent always keeps moving on the radial plane of the stent, the stent has no driving force in the axial direction of the stent, so when the recovery line is pulled, the stent will not be displaced in the axial direction, that is, the stent system of the present invention can avoid the displacement of the stent due to dragging when the recovery line is pulled to shrink the stent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] In the figure: Figure 1 This is an overall schematic diagram of a support system provided in a first embodiment of the present invention.

[0019] Figure 2 A partial structural schematic diagram of a support system provided in a first embodiment of the present invention.

[0020] Figure 3 for Figure 2 Cross-sectional view along the EE direction.

[0021] Figure 4 for Figure 2 Schematic top view of .

[0022] Figure 5 A partial structural schematic diagram of a support system provided in a second embodiment of the present invention.

[0023] Figure 6 for Figure 5 Cross-sectional view in the FF direction.

[0024] Figure 7 for Figure 5 Schematic top view of .

[0025] Figure 8 A partial structural schematic diagram of a support system provided in a third embodiment of the present invention.

[0026] Fig. 9 for Figure 8 Cross-sectional view along the GG direction.

[0027] Fig.10 for Figure 8 Schematic top view of .

[0028] Fig.11 A partial structural schematic diagram of a support system provided in a fourth embodiment of the present invention.

[0029] Fig.12 for Fig.11 Cross-sectional view along the GG direction.

[0030] Fig.13 for Fig.11 Schematic top view of .

[0031] Fig.14 A partial structural schematic diagram of a support system provided in a fifth embodiment of the present invention.

[0032] Fig.15 for Fig.14 Cross-sectional view along the HH direction.

[0033] Fig.16 for Fig.14 Schematic top view of .

[0034] Among them, the reference numerals in the figures are: 1, support; 11, membrane; 12, blocking part.

[0035] 2. Recovery line; 21. Insertion section; 22. Escape section.

[0036] 4. Central tube; 401. Channel; 41. Inlet; 42. Outlet; 5. Outer tube; 51. Window.

[0037] 6. Stent inserter. DETAILED DESCRIPTION

[0038] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0039] refer to Figure 1-16As shown, a first embodiment of the present invention provides a stent system, including a stent 1, a recovery line 2 and a central tube 4. A blocking portion 12 is provided on the stent 1, and the blocking portion 12 is used to be tightly attached to the inner wall of the tissue after releasing the expansion. The recovery line 2 includes an open-loop insertion segment 21 and two escape segments 22 respectively located at both ends of the insertion segment 21. The insertion segment 21 surrounds the blocking portion 12 along the circumference of the stent 1. The central tube 4 is used to extend into the stent 1. An inlet 41 is provided on the central tube 4. The inlet 41 and the insertion segment 21 in the recovery line 2 are on the same radial plane of the stent 1. The escape segment 22 penetrates into the central tube 4 through the inlet 41, so that when the escape segment 22 is gradually retracted into the central tube 4 through the inlet 41, the insertion segment 21 gradually shrinks and decreases. The contraction of the insertion segment 21 drives the blocking portion 12 to shrink radially inward and detach from the inner wall of the tissue. Therefore, through the above technical solution, in the process of pulling the disengaged section 22 in the recovery line 2 into the central tube 4 through the inlet 41, since the insertion section 21 on the stent 1 always keeps moving on the radial plane of the stent 1, the stent 1 has no driving force along the axial direction of the stent 1. Therefore, when the recovery line 2 is pulled, the stent 1 will not be displaced in the axial direction. That is, the stent system of the present invention can avoid the displacement of the stent 1 due to dragging when the recovery line 2 is pulled to contract the stent 1.

[0040] In some embodiments, the blocking portion 12 is a cylindrical structure formed by radially outwardly protruding at one end of the stent 1, so that when the blocking portion 12 is released and opened, it is embedded in the inner wall of the tissue to anchor the stent 1. It is understandable that the blocking portion 12 can also be a spherical structure, a trumpet structure, etc. In other embodiments not shown in the figures, both ends of the stent 1 are provided with blocking portions 12.

[0041] In some of the embodiments, a membrane 11 is also provided on the stent 1 to prevent mucosal epithelial cells from growing into and wrapping the pores of the stent 1, or to prevent diseases such as perforation of the inner wall of the tissue from being sealed by the membrane 11. Specifically, the membrane 11 is provided on the outside of the stent 1. It is understood that the membrane 11 can also be provided on the inside of the stent 1, or connected to the stent 1 in other forms. In addition, in the present embodiment, the membrane 11 is provided on the stent 1 in a fully covered manner. It is understood that the membrane 11 can also be provided at a local position of the stent 1, or the stent 1 is not provided with a membrane 11.

[0042] refer to Figure 4As shown, the insertion section 21 of the recovery line 2 is arranged around the circumference of the blocking portion 12 in the stent 1, and the insertion section 21 is alternately inserted between the inside of the stent 1 and the outside of the stent 1. Therefore, when the escape sections 22 at both ends of the insertion section 21 are pulled, the insertion section 21 can be gradually separated from the stent 1 from both ends, so that the insertion section 21 gradually shrinks and decreases, and the shrinking insertion section 21 causes the outer diameter of the blocking portion 12 to decrease, so that the blocking portion 12 is separated from the inner wall of the tissue, so as to facilitate the displacement of the stent 1. Specifically, the insertion section 21 is inserted into the membrane 11 of the stent 1. It can be understood that in other embodiments not shown in the figure, the insertion section 21 can also be inserted into the pores of the stent 1. In addition, since the insertion section 21 in the recovery line 2 is surrounded by the stent 1 in an interlaced manner, the insertion section 21 can be selected to be set at any position on the blocking portion 12 so that the blocking portion 12 can be shrunk to the expected state.

[0043] In addition, through the above-mentioned technical solution, in the process of pulling the recovery line 2 to shrink the stent 1, since the central tube 4 is inserted into and exists in the stent 1, even if the resistance generated by the insertion section 21 in the recovery line 2 and the various parts of the stent 1 are different, making the shrinkage speed of various parts of the stent 1 inconsistent, the stent 1 will eventually be shrunk and wrapped around the central tube 4, thereby ensuring that the stent 1 can eventually be fully shrunk to facilitate the adjustment of the position of the stent 1 in the body.

[0044] like Figure 1 As shown, in some embodiments, the stent system further includes an outer tube 5, the central tube 4 is inserted into the outer tube 5, and the inner cavity of the outer tube 5 and the position near the end are used to place the retracted stent 1, so that when the outer tube 5 slides axially relative to the central tube 4, the stent 1 is released from the outer tube 5 to be released and opened. It can be understood that when the stent 1 is not completely released and opened from the outer tube 5, and the blocking portion 12 in the stent 1 is completely released, the blocking portion 12 in the stent 1 can be retracted and reduced by pulling the recovery line 2, so as to adjust the position of the stent 1 by moving the central tube 4 and the outer tube 5, or, after the stent 1 is completely released from the outer tube 5, the blocking portion 12 is retracted by pulling the recovery line 2, and the position of the stent 1 is adjusted by moving the central tube 4.

[0045] In order to facilitate the outer tube 5 to slide axially relative to the central tube 4, so as to control the stent 1 to be released in the body, Figure 1As shown, in some embodiments, the stent system further includes a stent inserter 6, the outer tube 5 is mounted on the stent inserter 6, the central tube 4 is also mounted on the stent inserter 6 and penetrated in the outer tube 5, the stent inserter 6 is used to control the outer tube 5 to slide relative to the central tube 4, and the disengagement section 22 in the recovery line 2 extends out of the body after penetrating the central tube 4. It should be understood that the structure of the stent inserter 6 refers to a stent inserter disclosed in application number: CN202111045105.5, and will not be described in detail here. Thus, through the above technical solution, the shrunk stent 1 is first inserted into the outer tube 5, the recovery line 2 is inserted into the central tube 4 and is located outside the body, and the stent 1 is delivered to the release position in the human body through the stent implanter 6, and the stent implanter 6 is manipulated to make the outer tube 5 slide relative to the central tube 4, and the stent 1 is released and opened in the process of gradually separating from the outer tube 5. When the position of the stent 1 needs to be adjusted, the detachment section 22 of the recovery line 2 located outside the body is pulled, so that the insertion section 21 is gradually retracted into the central tube 4 so as to reduce the shrinkage. The reduction in the shrinkage of the insertion section 21 drives the blocking portion 12 on the stent 1 to shrink inwardly and reduce, so that the blocking portion 12 is separated from the inner wall of the tissue, so that the stent 1 and the inner wall of the tissue are separated or the resistance between them is reduced, and then the position of the stent 1 is adjusted by moving the stent implanter 6.

[0046] like Figure 1 As shown, in some embodiments, the central tube 4 is provided with an outlet 42 for the escaped section 22 in the recovery line 2 to extend out of the central tube 4 to facilitate the pulling of the recovery line 2. Specifically, the outlet 42 is provided on the side wall of the central tube 4, and a window 51 is provided on the outer tube 5 corresponding to the outlet 42, so that the escaped section 22 extending from the outlet 42 can pass through the window 51.

[0047] It is understandable that in some other embodiments not shown in the figures, the outlet 42 on the central tube 4 is opened on the tail end face of the central tube 4 , and the window 51 is provided on the end face of the outer tube 5 close to the outlet 42 .

[0048] like Figure 2-4 As shown, in the first embodiment of the present invention, the recovery line 2 is provided with an inlet 41 provided on an end surface of the central tube 4 corresponding to the bracket 1. It is understandable that in other embodiments not shown in the figures, the inlet 41 is opened on the side wall of the central tube 4.

[0049] In order to make the blocking portion 12 on the stent 1 shrink more evenly, in other embodiments, a plurality of recovery lines 2 are provided, and the insertion sections 21 of the plurality of recovery lines 2 are distributed on the blocking portion 12 of the stent 1 at intervals along the axial direction of the stent 1, and the escape sections 22 of the plurality of recovery lines 2 are all inserted into the channel 401 in the central tube 4. More specifically, the escape sections 22 of the plurality of recovery lines 2 pass through the central tube 4 and extend out of the body along the channel 401 on the central tube 4, so as to facilitate the simultaneous control of the actions of the plurality of recovery lines 2.

[0050] like Figure 5-10 As shown, in some other embodiments, a plurality of channels 401 are arranged in the central tube 4 at intervals, and the plurality of channels 401 are distributed on the central tube 4 along the circumference of the central tube 4. An inlet 41 is arranged on the central tube 4 corresponding to each channel 401. The inlet 41 is arranged on an end portion and / or a side wall of the central tube 4 corresponding to the bracket 1 and communicates with the corresponding channel 401. Figure 5-7 As shown, the second embodiment of the present invention differs from the first embodiment only in that: two recovery lines 2 are provided, two channels 401 are provided corresponding to the recovery lines 2, and two inlets 41 are also provided. The two inlets 41 are respectively provided at one end of the central tube 4 corresponding to the bracket 1 and on the side wall. It can be understood that in other embodiments not shown in the figure, the two inlets 41 are both provided on the side wall of the central tube 4. Figure 8-10 As shown, the third embodiment of the present invention is different from the first embodiment only in that: three recovery lines 2 are provided, three channels 401 are provided corresponding to the recovery lines 2, and three inlets 41 are also provided. The inlet 41 is provided at one end of the central tube 4 corresponding to the bracket 1 and on the side wall of the central tube 4. It can be understood that in other embodiments not shown in the figures, the inlet 41 is provided on the side wall of the central tube 4. In addition, it can be understood that the recovery line 2 can also be provided with other numbers, and there is no limitation on this. In the present embodiment, the cross section of the channel 401 is a circular structure. It can be understood that the channel 401 can also be provided with structures of other shapes such as square and ellipse.

[0051] like Figure 11-16 As shown, in some other embodiments, a plurality of channels 401 are arranged at intervals in the central tube 4, and the channels 401 include a main channel arranged at the axis of the central tube 4 and a plurality of branch channels arranged around the main channel. An inlet 41 is arranged on the central tube 4 corresponding to each channel 401, and the inlet 41 is arranged on an end portion and / or a side wall of the central tube 4 corresponding to the bracket 1 and communicates with the corresponding channel 401. Figure 11-13 As shown, the fourth embodiment of the present invention differs from the first embodiment only in that: there are four recovery lines 2, four channels 401 are provided corresponding to the recovery lines 2, the channels 401 include a main channel provided at the axis of the central tube 4 and three branch channels provided around the main channel, and four inlets 41 are also provided, and the inlets 41 are respectively provided at one end of the central tube 4 corresponding to the bracket 1 and on the side wall of the central tube 4. It can be understood that in other embodiments not shown in the figures, the inlets 41 are all provided on the side wall of the central tube 4. Figure 14-16As shown, the fifth embodiment of the present invention is different from the first embodiment only in that: there are five recovery lines 2, and five channels 401 are provided corresponding to the recovery lines 2. The channel 401 includes a main channel arranged at the axis of the central tube 4 and four branch channels arranged around the main channel. There are also five inlets 41, and the inlets 41 are respectively arranged at one end of the central tube 4 corresponding to the bracket 1 and on the side wall of the central tube 4. It can be understood that in other embodiments not shown in the figures, the inlets 41 are all arranged on the side wall of the central tube 4. In addition, it can be understood that the recovery line 2 can also be set to other numbers, and there is no limitation on this. In the present embodiment, the cross section of the main channel in the channel 401 is a circular structure, and the cross section of the branch channel is an arc-shaped structure. It can be understood that the main channel and the branch channel are not limited to structures of other shapes such as square and ellipse.

[0052] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the scope of the present invention through the above description. The technical scope of this 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 support system, characterized in that: It includes a bracket, a recovery line and a center tube, the bracket is provided with a blocking part, the recovery line includes an open-loop insertion section and two escape sections respectively located at the two ends of the insertion section, the insertion section surrounds the blocking part along the circumference of the bracket, the center tube is used to extend into the bracket, the center tube is provided with an inlet, the inlet and the insertion section in the recovery line are in the same radial plane on the bracket, the escape section penetrates into the center tube through the inlet, so that when the escape section is gradually retracted into the center tube through the inlet, the insertion section gradually shrinks and decreases, and the shrinkage of the insertion section drives the blocking part to shrink radially inward.

2. The bracket system according to claim 1, characterized in that: The recycling line is provided with one.

3. The bracket system according to claim 1, characterized in that: The recovery lines are provided in plurality, and the insertion sections of the recovery lines are distributed on the blocking portion of the support at intervals along the axial direction of the support, and the escape sections of the recovery lines are all inserted into the channel opened in the central tube.

4. The support system according to claim 3, characterized in that: There are multiple channels in the central tube arranged at intervals, and the multiple channels are distributed on the central tube along the circumference of the central tube. The central tube is provided with an inlet corresponding to each channel. The inlet is arranged at one end of the central tube corresponding to the bracket and / or on the side wall of the central tube, and the inlet is communicated with the corresponding channel.

5. The support system according to claim 4, characterized in that: There are two recovery lines, two channels corresponding to the recovery lines, and two inlets, which are respectively arranged at one end of the central tube corresponding to the bracket and on the side wall of the central tube, or both inlets are arranged on the side wall of the central tube.

6. The support system according to claim 3, characterized in that: There are multiple channels in the central tube arranged at intervals, and the channels include a main channel arranged at the axis of the central tube and multiple branch channels arranged around the main channel. The central tube is provided with an inlet corresponding to each of the channels, and the inlet is arranged at one end of the central tube corresponding to the bracket and / or on the side wall of the central tube, and the inlet is communicated with the corresponding channel.

7. The support system according to claim 6, characterized in that: There are four recovery lines, four channels corresponding to the recovery lines, the channels include a main channel arranged at the axis of the central tube and three branch channels arranged around the main channel, and four inlets are arranged respectively at one end of the central tube corresponding to the bracket and on the side wall of the central tube, or the inlets are all arranged on the side wall of the central tube.

8. The support system according to claim 1, characterized in that: A membrane is also arranged on the support.

9. The support system according to claim 1, characterized in that: The blocking portion is a cylindrical structure formed by the bracket protruding outward in the radial direction.

10. The support system according to claim 1, characterized in that: The stent system also includes an outer tube, the central tube is inserted into the outer tube, and the inner cavity of the outer tube is used to place the contracted stent so that when the outer tube slides axially relative to the central tube, the stent can be released from the outer tube to be released and opened.

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