Adjustable Bracket System

Abstract

The present invention discloses an adjustable stent system, which belongs to the field of medical device technology. It mainly includes a stent and a recovery line. The stent is provided with a blocking portion, which is used to adhere to the inner wall of the tissue after the expansion is released. The recovery line includes an open-loop insertion section and two disengagement sections located at both ends of the insertion section. The insertion section surrounds the blocking portion along the circumference of the stent, so that when the disengagement section of the recovery line is pulled, the insertion section gradually detaches from the stent and shrinks and reduces. The insertion section shrinks to drive the blocking portion to shrink inward. The adjustable stent system of the present invention can adjust the position of the stent even after the blocking portion in the stent is released.

Description

Technical Field

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

[0002] Treatment using stents has become widely used. For example, stents are placed in narrowed or blocked areas in tubular organs such as the bile duct, ureter, trachea, blood vessels, and esophagus, as well as in body cavities, to expand the narrowed or blocked areas and facilitate the flow of bile and blood. Stents are also placed in areas where aneurysms have occurred to prevent them from rupture.

[0003] Because stents are positioned and placed within the affected area of internal tissue, they can sometimes become misaligned. Existing stents employ a structure that incorporates a trumpet-shaped, expanded opening or a dumbbell-shaped, enlarged barrier at the end of the stent. This barrier adheres tightly to the inner wall of the internal tissue, preventing misalignment through an anchoring effect. However, once the barrier is released during use, the tight contact between the barrier and the internal tissue makes it difficult to adjust the stent's position, complicating the surgical procedure.

[0004] Therefore, it is necessary to provide an adjustable bracket system to solve the above problems. Summary of the Invention

[0005] In view of the above problems existing in the prior art, an object of the embodiments of the present invention is to provide an adjustable bracket system, which can adjust the position of the bracket even after the blocking portion in the bracket is released.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an adjustable stent system, including a stent and a recovery line, a blocking portion is provided on the stent, and the blocking portion is used to be tightly attached to the inner wall of the tissue after releasing the expansion, and the recovery line includes an open-loop insertion section and two disengagement sections respectively located at both ends of the insertion section, and the insertion section surrounds the blocking portion along the circumference of the stent, so that when the disengagement section of the recovery line is pulled, the insertion section gradually detaches from the stent and shrinks and reduces, and the insertion section shrinks to drive the blocking portion to shrink inward.

[0007] Furthermore, the insertion section of the recovery line circles around the blocking portion of the stent at most once in the circumferential direction, and the insertion section alternately inserts between the inside of the stent and the outside of the stent.

[0008] Furthermore, the insertion section of the recovery line circles around the circumference of the blocking portion in the stent for more than one circle, and the insertion section alternately inserts between the inside of the stent and the outside of the stent.

[0009] Furthermore, the adjustable bracket system also includes an auxiliary line, which surrounds and is connected to the blocking part of the bracket. A plurality of inner segments are provided on the auxiliary line and located on the inner side of the bracket. The inner segments are spaced apart along the circumference of the bracket. The interspersed segment of the recovery line surrounds the circumference of the blocking part in the bracket at most once, or the interspersed segment surrounds the circumference of the blocking part more than once. In addition, the interspersed segment is interspersed on a plurality of inner segments.

[0010] Furthermore, the adjustable support system also includes a central tube, which is used to extend into the support. The interior of the central tube is used for the protruding section of the recovery line to penetrate and extend outside the body, so as to facilitate pulling the protruding section to contract the inserted section.

[0011] Furthermore, an inlet is provided on the central tube, and the inlet is used for allowing the recovery line to pass into the central tube.

[0012] Furthermore, the adjustable 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.

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

[0014] Furthermore, the membrane is coated on the outside of the stent.

[0015] Furthermore, the blocking portion is a cylindrical structure protruding along the radial direction of the bracket.

[0016] The beneficial effects of the present invention are as follows: the present invention provides an adjustable stent system, in which the recovery line includes an open-loop insertion section and two disengagement sections located at both ends of the insertion section, the insertion section surrounds the blocking portion along the circumference of the stent, so that when the disengagement section in the recovery line is pulled, the insertion section gradually separates from the stent and shrinks and reduces, and the insertion section shrinks to drive the blocking portion to shrink inward and thus separate from the inner wall of the tissue, so as to facilitate the displacement of the stent, so that when the blocking portion on the stent is released, the recovery line can be pulled to drive the blocking portion to shrink inward and thus separate from the inner wall of the tissue, and after the anchoring effect is lost, the movement resistance of the stent is effectively reduced, so that the position of the stent in the tissue can be adjusted, that is, the adjustable stent system of the present invention can still adjust the position of the stent after the blocking portion in the stent is released. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and examples.

[0018] In the picture:

[0019] Figure 1Overall schematic diagram of the adjustable bracket system provided in the first embodiment of the present invention;

[0020] Figure 2 Partial structural schematic diagram of the adjustable bracket system provided in the first embodiment of the present invention;

[0021] Figure 3 It is Figure 2 Cross-sectional view in the E-E direction in;

[0022] Figure 4 It is Figure 2 Top view schematic diagram of;

[0023] Figure 5 Partial structural schematic diagram of the adjustable bracket system provided in the second embodiment of the present invention;

[0024] Figure 6 It is Figure 5 Cross-sectional view in the F-F direction in;

[0025] Figure 7 It is Figure 5 Top view schematic diagram of;

[0026] Figure 8 Partial structural schematic diagram of the adjustable bracket system provided in the third embodiment of the present invention;

[0027] Figure 9 It is Figure 8 Cross-sectional view in the G-G direction in;

[0028] Figure 10 It is Figure 8 Top view schematic diagram of.

[0029] Among them, each reference numeral in the figure:

[0030] 1. Bracket; 11. Membrane; 12. Blocking part.

[0031] 2. Recovery line; 21. Insertion section; 22. Ejection section.

[0032] 3. Auxiliary line; 31. Inner section; 32. Outer section.

[0033] 4. Central tube; 41. Inlet; 42. Outlet; 5. Outer tube; 51. Window.

[0034] 6. Bracket inserter. Detailed implementation mode

[0035] Now the present invention will be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, only illustrating the basic structure of the present invention in a schematic manner, so it only shows the components related to the present invention.

[0036] Embodiment 1

[0037] refer to Figure 1-4 As shown, the first embodiment of the present invention provides an adjustable stent system, including a stent 1 and a retrieval line 2, wherein the stent 1 is provided with a blocking portion 12, the blocking portion 12 being used to adhere to the inner wall of the tissue after the expansion is released, the retrieval line 2 includes an open-loop insertion section 21 and two disengagement sections 22 located at both ends of the insertion section 21, the insertion section 21 surrounds the blocking portion 12 along the circumference of the stent 1, so that when the disengagement section 22 in the retrieval line 2 is pulled, the insertion section 21 gradually detaches from the stent 1 and shrinks and reduces, and the insertion section 21 shrinks to drive the blocking portion 12 to shrink inwardly and thus detach from the inner wall of the tissue, so as to facilitate the displacement of the stent 1. Thus, through the above technical solution, when the blocking portion 12 on the stent 1 is released, the retrieval line 2 can be pulled to drive the blocking portion 12 to shrink inwardly and thus detach from the inner wall of the tissue, so as to facilitate the displacement of the stent 1. Thus, through the above technical solution, when the blocking portion 12 on the stent 1 is released, the blocking portion 12 can be driven to shrink inwardly and detach from the inner wall of the tissue by pulling the retrieval line 2, and the movement resistance of the stent 1 is effectively reduced after the anchoring effect is lost, so that the position of the stent 1 in the tissue can be adjusted, that is, the adjustable stent system of the present invention can still adjust the position of the stent after the blocking portion 12 in the stent 1 is released.

[0038] In some embodiments, the blocking portion 12 is a cylindrical structure formed by radially protruding from one end of the stent 1. When the blocking portion 12 is released, it embeds into the inner wall of the tissue, thereby anchoring the stent 1. It is understood that the blocking portion 12 can also have a spherical structure, a bell-shaped structure, etc. In other embodiments not shown, the blocking portion 12 is provided at both ends of the stent 1.

[0039] like Figure 2 As shown, in some embodiments, a membrane 11 is further provided on the stent 1 to prevent mucosal epithelial cells from growing into and enveloping the pores of the stent 1, or to prevent diseases such as perforation of the tissue wall by sealing the membrane 11. Specifically, the membrane 11 is coated on the outside of the stent 11. It is understood that the membrane 11 can also be provided on the inside of the stent 11, or connected to the stent 1 in other forms. In addition, in this embodiment, the membrane 11 is provided on the stent 1 in a full-coverage manner. It is understood that the membrane 11 can also be provided in a localized position on the stent 1, or the stent 1 can be provided without the membrane 11.

[0040] like Figure 4As shown, the insertion section 21 of the recovery line 2 surrounds the blocking portion 12 in the stent 1 at most once in the circumferential direction, and the insertion section 21 alternately intersperses between the inside of the stent 1 and the outside of the stent 1. Thus, when the disengagement sections 22 at both ends of the insertion section 21 are subjected to a pulling force, 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. 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 figures, 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 inserted around the stent 1, 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 contracted to the desired state.

[0041] like Figure 2 and Figure 3 As shown, in some embodiments, the adjustable stent system further includes a central tube 4, which is configured to extend into the stent 1. The interior of the central tube 4 is configured to allow the protruding segment 22 to penetrate and extend outside the body, thereby pulling the protruding segment 22 to retract the insertion segment 21. As the protruding segments 22 at both ends of the insertion segment 21 are pulled and gradually retracted into the central tube 4, the length of the insertion segment 21 gradually decreases, thereby causing the annular insertion segment 21 to gradually shrink. The shrinking insertion segment 21 causes the outer diameter of the blocking portion 12 to decrease, allowing the blocking portion 12 to separate from the inner wall of the tissue.

[0042] like Figure 3 As shown, in some embodiments, an inlet 41 is provided on the central tube 4, and the inlet 41 and the insertion section 21 of the recovery line 2 are located in the same radial plane on the stent 1, and the escape section 22 in the recovery line 2 penetrates the central tube 4 through the inlet 41. Thus, through the above technical solution, in the process of the escape section 22 in the recovery line 2 passing through the inlet 41 and entering the central tube 4, since the insertion section 21 connected to the stent 1 always keeps moving on the plane, the stent 1 does not have a driving force in the axial direction of the stent 1. Therefore, when the recovery line 2 is pulled, the axial position of the stent 1 will not be deviated, and the position of the stent 1 will not need to be adjusted multiple times. Specifically, the inlet 41 is provided on the end face of the central tube 4 corresponding to the stent 1. It can be understood that in other embodiments not shown in the figures, the inlet 41 can also be provided on the side wall of the central tube 4.

[0043] In addition, through the above technical solution, during the process of the traction recovery line 2 shrinking the stent 1, since the central tube 4 is inserted and exists within the stent 1, even if the resistance generated by the insertion section 21 in the recovery line 2 coming into contact with various parts of the stent 1 is different, causing the shrinking speed of each part of the stent 1 to be inconsistent, the stent 1 will ultimately be shrunk and wrapped around the central tube 4, thereby ensuring that the stent 1 can ultimately be fully shrunk, facilitating the adjustment of the position of the stent 1 within the body.

[0044] As Figure 1 shown, in some embodiments, the adjustable 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 near the most distal end is used to place the shrunk stent 1, so that when the outer tube 5 slides axially relative to the central tube 4, the stent 1 can be released from the outer tube 5 and opened. It can be understood that when the stent 1 is not fully released and opened from the outer tube 5, and the blocking portion 12 in the stent 1 has been fully released, at this time, the traction recovery line 2 can be used to shrink and reduce the blocking portion 12 in the stent 1, 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 shrunk by the traction recovery line 2, and the position of the stent 1 is adjusted by moving the central tube 4.

[0045] To facilitate the axial sliding of the outer tube 5 relative to the central tube 4 to control the release of the stent 1 within the body, as Figure 1 shown, in some embodiments, the adjustable stent system further includes a stent introducer 6. The outer tube 5 is installed on the stent introducer 6, and the central tube 4 is also installed on the stent introducer 6 and inserted into the outer tube 5. The stent introducer 6 is used to control the sliding of the outer tube 5 relative to the central tube 4, and the protruding section 22 of the recovery line 2 extends out of the body after passing through the central tube 4. It should be understood that the structure of the stent introducer 6 refers to a stent introducer disclosed in the application number: CN202111045105.5, which will not be described in detail here. Thus, through the above technical solution, first, the shrunk stent 1 is inserted into the outer tube 5, the recovery line 2 passes through the central tube 4 and is located outside the body. Then, the stent 1 is sent to the position to be released within the human body through the stent introducer 6. The stent introducer 6 is controlled to make the outer tube 5 slide relative to the central tube 4. During the process of the stent 1 gradually detaching from the outer tube 5, it is released and opened. When the position of the stent 1 needs to be adjusted, the protruding section 22 of the traction recovery line 1 outside the body is pulled, so that the insertion section 21 gradually retracts into the central tube 4 and shrinks and reduces. The shrinking and reduction of the insertion section 21 drives the blocking portion 12 on the stent 1 to contract and reduce inward, so that the blocking portion 12 disengages from the inner wall of the tissue, causing the stent 1 to disengage from the inner wall of the tissue or reducing the resistance between them. Then, the position of the stent 1 is adjusted by moving the stent introducer 6.

[0046] As Figure 1As shown, in some of these embodiments, an outlet 42 is provided on the central tube 4 for the protruding section 22 of the recovery line 2 to extend from inside the central tube 4 to the outside of the body, so as to facilitate the actuation of the traction 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 for the protruding section 22 extending from the outlet 42 to pass through the window 51 again.

[0047] It can be understood that in some other embodiments, the outlet 42 on the central tube 4 is provided on the end face of the tail end of the central tube 4, and the window 51 is provided on the end face of one end of the outer tube 5 close to the outlet 42.

[0048] Embodiment Two

[0049] As Figure 5-7 shown, compared with the adjustable stent system provided in Embodiment One, the adjustable stent system provided in Embodiment Two is only different in the structure of the recovery line 2, and the specific description is as follows:

[0050] As Figure 7 shown, the inserted section 21 of the recovery line 2 surrounds the circumferential direction of the blocking portion 12 in the stent 1 for more than one turn, and at the same time, the inserted section 21 alternately inserts between the inside and the outside of the stent 1. Thus, when the protruding sections 22 at both ends of the inserted section 21 are subjected to a pulling force, the inserted section 21 gradually disengages from the stent 1 from both ends, and the inserted section 21 gradually contracts and decreases. The contracted inserted section 21 causes the outer diameter of the blocking portion 12 to decrease, and the blocking portion 12 disengages from the inner wall of the tissue.

[0051] Embodiment Three

[0052] As Figure 8-10 shown, compared with the adjustable stent system provided in Embodiment One, the adjustable stent system provided in Embodiment Three is only different in the structure of the recovery line 2, and the specific description is as follows:

[0053] As Figure 10As shown, in some embodiments, the adjustable stent system further includes an auxiliary wire 3, which surrounds and is connected to the blocking portion 12 of the stent 1. A plurality of inner segments 31 are provided on the auxiliary wire 3 and located on the inner side of the stent 1. The inner segments 31 are spaced apart along the circumference of the stent 1. The insertion segment 21 of the recovery wire 2 surrounds the blocking portion 12 in the stent 1 at most once, or the insertion segment 21 surrounds the blocking portion 12 more than once. In addition, the insertion segment 21 is inserted into the plurality of inner segments 31 on the auxiliary wire 3. Therefore, when the disengagement segments 22 at both ends of the insertion segment 21 are subjected to a pulling force, the insertion segment 21 gradually detaches from the auxiliary wire 3 from both ends, causing the insertion segment 21 to gradually shrink and reduce. The shrinking insertion segment 21 causes the outer diameter of the blocking portion 12 connected to the auxiliary wire 3 to decrease, thereby causing the blocking portion 12 to detach from the inner wall of the tissue. And because the recovery line 2 is connected to the auxiliary line 3 through insertion, when the recovery line 2 is pulled to shrink the insertion section 21, the insertion section 21 is subjected to less resistance and is less likely to get stuck. Specifically, the auxiliary line 3 is connected at both ends after being wrapped around the circumference of the blocking portion 12 in the bracket 1. The auxiliary line 3 is alternately inserted between the inside of the bracket 1 and the outside of the bracket 1, so that the part of the auxiliary line 3 on the inside of the bracket 1 forms an inner section 31, and the part of the auxiliary line 3 on the outside of the bracket 1 forms an outer section 32. It is understandable that in other embodiments not shown in the figures, the auxiliary line 3 can be wrapped around the inside of the bracket 1, and the auxiliary line 3 is intermittently connected and fixed to the inner wall of the bracket 1 to form multiple inner sections 31 at intervals. In addition, the auxiliary line 3 can also be wrapped around the circumference of the blocking portion 12 in the bracket 1 for less than one full circle, and the two ends of the auxiliary line 3 are connected and fixed to the bracket 1; or the auxiliary line 3 is connected at both ends after being wrapped around the circumference of the blocking portion 12 in the bracket 1 for multiple circles.

[0054] With the above-described preferred embodiments of the present invention as inspiration, and with reference to the above description, relevant personnel may make various changes and modifications without departing from the scope of the present invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An adjustable support system, characterized in that: The support frame includes a support frame and a recovery line. The support frame is provided with a blocking portion, which is used to adhere to the inner wall of the tissue after releasing the expansion. The recovery line includes an open-loop insertion section and two disengagement sections located at both ends of the insertion section. The insertion section surrounds the blocking portion along the circumference of the support frame, so that when the disengagement section of the recovery line is pulled, the insertion section gradually separates from the support frame and shrinks and reduces. The insertion section shrinks to drive the blocking portion to shrink inward. The adjustable support system also includes a central tube, which is used to extend into the support frame. The interior of the central tube is used for the disengagement section of the recovery line to penetrate and extend outside the body, so as to pull the disengagement section to shrink the insertion section. An inlet is opened on the central tube, and the inlet and the insertion section of the recovery line are in the same radial plane on the support frame. The disengagement section in the recovery line penetrates the central tube through the inlet.

2. The adjustable support system according to claim 1, wherein: The insertion section of the recovery line circles around the circumference of the blocking portion in the stent for at most one circle, and the insertion section alternately inserts between the inside of the stent and the outside of the stent.

3. The adjustable bracket system according to claim 1, wherein: The insertion section of the recovery line circles around the circumference of the blocking portion in the stent for more than one circle, and the insertion section alternately inserts between the inside of the stent and the outside of the stent.

4. The adjustable bracket system according to claim 1, wherein: The adjustable bracket system also includes an auxiliary line, which surrounds and is connected to the blocking part of the bracket. A plurality of inner segments are provided on the auxiliary line and located on the inner side of the bracket. The inner segments are distributed at intervals along the circumference of the bracket. The interspersed segment of the recovery line surrounds the circumference of the blocking part in the bracket at most once, or the interspersed segment surrounds the circumference of the blocking part more than once. In addition, the interspersed segment is interspersed on a plurality of inner segments.

5. The adjustable support system according to claim 1, wherein: The adjustable 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 is released from the outer tube and opened.

6. The adjustable bracket system according to claim 1, characterized in that: A membrane is provided on the support.

7. The adjustable support system according to claim 6, wherein: The membrane is coated on the outside of the stent.

8. The adjustable bracket system according to claim 1, wherein: The blocking portion is a cylindrical structure protruding along the radial direction of the bracket.

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