An anchoring device

Abstract

The present invention provides an anchoring device, which includes a proximal anchor, a distal anchor and a connecting member. The distal anchor and the proximal anchor are sleeved on the connecting member. The connecting member is used to restrict the distal anchor from moving distally relative to the connecting member and to restrict the proximal anchor from moving proximally relative to the connecting member. In the present invention, since the proximal anchor is sleeved on the connecting member and the connecting member can restrict the proximal anchor from moving proximally relative to the connecting member, the connection effectiveness and stability between the proximal anchor and the connecting member can be improved, thereby improving the anchoring effectiveness and stability of the anchoring device.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to an anchoring device. Background Art

[0002] Benign prostatic hyperplasia is the most common benign disease that causes urinary dysfunction problems in middle-aged and elderly men. It is mainly manifested as the hyperplasia of prostatic stromal and glandular components histologically, the enlargement of the prostate anatomically, the clinical symptoms mainly of lower urinary tract symptoms, and the bladder outlet obstruction urodynamically.

[0003] Benign prostatic hyperplasia occurs in the transitional zone and is a true hyperplasia process, that is, an increase in cell number rather than cell hypertrophy. The hyperplastic cells grow in a nodular manner and are divided into stromal type and acinar type, containing different amounts of stroma (including collagen and smooth muscle) and glandular epithelial components. The hyperplastic tissue mainly includes smooth muscle (effective for α-blockers), glandular epithelium (effective for 5α-reductase inhibitors), and collagen (ineffective for both α-blockers and 5α-reductase inhibitors). The hyperplastic tissue squeezes the surrounding glands into a surgical capsule, providing a separation interface for the removal operation. Histologically, the incidence of benign prostatic hyperplasia increases with age. Men start to have varying degrees of prostatic hyperplasia at the age of 35: 41-50 years old, about 20%; 51-60 years old, about 50%; >80 years old, about 90% or more. Similar to the histological manifestations, with the increase of age, symptoms such as dysuria also increase. 25% of the population aged 55 has symptoms of urinary obstruction, and 50% of the population aged 75 has a weakened and thinned urine stream.

[0004] In addition to drug treatment, the surgical methods for benign prostatic hyperplasia are as follows: (1) Transurethral resection of the prostate; (2) Suprapubic or retropubic prostatectomy; (3) Laser enucleation or resection of the prostate; (4) Minimally invasive treatment including prostate stents.

[0005] In the minimally invasive treatment including prostate stents, an anchoring device is usually used. This anchoring device is a permanent implant for relieving thin urine flow. This anchoring device is implanted into the urethra through a delivery system. After implantation, it can mechanically separate the left and right lobes of the prostate to push away the prostatic tissue compressing the urethra, thereby achieving the therapeutic effect. This anchoring device has extremely low invasiveness and does not require ablation, can continuously relieve the symptoms of patients, and has a good therapeutic effect.

[0006] However, the existing anchoring device has a risk of easy displacement and detachment after implantation, and the effectiveness and stability of the anchoring of the anchoring device need to be improved. Summary of the Invention

[0007] The purpose of the present invention is to provide an anchoring device to solve the problem of low effectiveness and stability of the anchoring of the existing anchoring device.

[0008] To solve the above technical problems, the present invention provides an anchoring device, which includes a proximal anchor, a distal anchor and a connecting member. The distal anchor and the proximal anchor are sleeved on the connecting member. The connecting member is used to restrict the distal movement of the distal anchor relative to the connecting member and to restrict the proximal movement of the proximal anchor relative to the connecting member.

[0009] Optionally, the proximal anchor includes a proximal main body and a proximal locking member. The proximal locking member includes at least one proximal elastic piece portion. The connecting member includes a main body section and a proximal connecting section. The proximal end of the main body section is fixedly connected to the proximal connecting section. Among them, the proximal main body and the proximal locking member are sleeved on the proximal connecting section. The distance between the fixed end of the proximal elastic piece portion and the axis of the proximal main body is greater than the distance between the free end of the proximal elastic piece portion and the axis of the proximal main body. The maximum outer diameter of the proximal connecting section is greater than or equal to the distance between the free end of the proximal elastic piece portion and the axis of the proximal main body.

[0010] Optionally, the proximal locking member is fixedly connected to the proximal end of the proximal main body. The fixed end of the proximal elastic piece portion is connected to the proximal end of the proximal main body, and the other end of the proximal elastic piece portion is the free end.

[0011] Optionally, the proximal locking member further includes a proximal locking main body. The proximal locking main body is tubular. The proximal end of the proximal locking main body is connected to the distal end of the proximal main body. The distal end of the proximal locking main body is the free end. A proximal window corresponding to the proximal elastic piece portion is formed on the proximal locking main body. The proximal elastic piece portion extends from the edge of the distal end of the proximal window into the inner cavity of the proximal locking main body. The end of the proximal elastic piece portion close to the edge of the distal end of the proximal window is the fixed end, and the end of the proximal elastic piece portion close to the inner cavity of the proximal locking main body is the free end.

[0012] Optionally, the distal anchor includes a distal main body and a distal locking member. The distal locking member includes at least one distal elastic piece portion. The connecting member further includes a distal connecting section. The distal end of the main body section is fixedly connected to the proximal end of the distal connecting section. Among them, the distal main body and the distal locking member are sleeved on the distal connecting section. The distance between the fixed end of the distal elastic piece portion and the axis of the distal main body is greater than the distance between the free end of the distal elastic piece portion and the axis of the distal main body. The maximum outer diameter of the distal connecting section is greater than or equal to the distance between the free end of the distal elastic piece portion and the axis of the distal main body.

[0013] Optionally, the distal locking member is fixedly connected to the distal end of the distal main body. One end of the distal elastic piece portion is connected to the distal end of the distal main body, and the other end of the distal elastic piece portion is the free end.

[0014] Optionally, the distal locking member further includes a distal locking body which is tubular. The distal end of the distal locking body is connected to the proximal end of the distal body. The proximal end of the proximal locking body is a free end. A distal window corresponding to the distal elastic piece portion is formed in the distal locking body. The distal elastic piece portion extends from the edge of the proximal end of the distal window into the inner cavity of the distal locking body. One end of the distal elastic piece portion close to the edge of the proximal end of the distal window is a fixed end, and one end of the distal elastic piece portion close to the inner cavity of the distal locking body is a free end.

[0015] Optionally, the distal connection segment includes a distal connection body and at least one distal limiting portion. The distal limiting portion is disposed on the outer surface of the distal connection body. The distal limiting portion cooperates with the free end of the distal elastic piece portion to limit the free end of the distal locking member from moving distally towards the connector.

[0016] Optionally, in the axial cross-section of the connector, the distal limiting portion is serrated or barbed.

[0017] Optionally, the distal limiting portions are arranged in sequence along the axial direction of the distal connection body, and the maximum outer diameter of the distal limiting portions increases in sequence from the distal end to the proximal end of the connector.

[0018] Optionally, the distal anchoring includes a distal body, a distal connecting arm, and a distal anchoring wing. The proximal end of the distal body is fixedly connected to one end of the distal connecting arm. The other end of the distal connecting arm is fixedly connected to one end of the distal anchoring wing. The other end of the distal anchoring wing is a free end. The distal body is fixedly connected to the connector. The distal anchoring has a release state. In the release state, the distal anchoring wing is linear; or, the distal end of the distal body is fixedly connected to one end of the distal connecting arm. The other end of the distal connecting arm is fixedly connected to one end of the distal anchoring wing. The other end of the distal anchoring wing is a free end. The distal body is fixedly connected to the connector. The distal anchoring has a release state. In the release state, the distal anchoring wing is arc-shaped.

[0019] Optionally, at least one first protrusion is disposed on the surface of the distal anchoring wing, or at least one first groove is formed therein.

[0020] Optionally, the distal anchoring is formed by cutting a pipe. The distal anchoring wings include a fifth surface, a sixth surface opposite to the fifth surface, and a seventh surface and an eighth surface connecting the fifth surface and the sixth surface. The fifth surface corresponds to the outer surface of the pipe, the sixth surface corresponds to the inner surface of the pipe, the seventh surface and the eighth surface correspond to two cut surfaces of the pipe, and the first protrusion and / or the first groove are arranged on the seventh surface and the eighth surface.

[0021] Optionally, there are at least two distal anchoring wings.

[0022] Optionally, the proximal connection section includes a proximal connection main body and at least one proximal limiting part. The proximal limiting part is arranged on the outer surface of the proximal connection main body. The proximal limiting part cooperates with the free end of the proximal elastic piece part to limit the free end of the proximal locking piece from moving proximally towards the connector.

[0023] Optionally, in the axial cross-section of the connector, the proximal limiting part is serrated or barbed.

[0024] Optionally, the proximal limiting parts are arranged in sequence along the axial direction of the proximal connection main body, and the maximum outer diameter of the proximal limiting parts increases in sequence from the proximal end to the distal end of the connector.

[0025] Optionally, the proximal anchoring includes a proximal main body, a proximal connection arm, proximal anchoring wings and a proximal locking piece. The distal end of the proximal main body is fixedly connected to one end of the proximal connection arm. The other end of the proximal connection arm is fixedly connected to one end of the proximal anchoring wings. The other end of the proximal anchoring wings is the free end. The proximal end of the proximal main body is connected to the proximal locking piece. The proximal locking piece is used to limit the proximal anchoring from moving proximally relative to the connector. The proximal anchoring has a release state, in which the proximal anchoring wings are linear in the release state; or, the proximal end of the proximal main body is fixedly connected to one end of the proximal connection arm, the other end of the proximal connection arm is fixedly connected to one end of the proximal anchoring wings, the other end of the proximal anchoring wings is the free end, the distal end of the proximal main body is connected to the proximal locking piece, and the proximal anchoring has a release state. In the release state, the proximal anchoring wings are arc-shaped.

[0026] Optionally, at least one second protrusion is arranged on the surface of the proximal anchoring wings, or at least one second groove is formed.

[0027] Optionally, the proximal anchor is cut and formed by a tube, and the proximal anchor wing includes a first surface, a second surface opposite to the first surface, and a third surface and a fourth surface connecting the first surface and the second surface, the first surface corresponds to the outer surface of the tube, the second surface corresponds to the inner surface of the tube, the third surface and the fourth surface correspond to two cut surfaces of the tube, and the second protrusion and / or the second groove are arranged on the third surface and the fourth surface.

[0028] Optionally, there are at least two of the proximal anchoring wings.

[0029] Optionally, the proximal anchor has a released state and a clamped state. In the released state, the proximal anchor is in an "I" shape or a "V" shape, and in the clamped state, the proximal anchor is retracted onto the connector. The distal anchor has a released state and a clamped state. In the released state, the distal anchor is in an "I" shape or a "V" shape, and in the clamped state, the distal anchor is retracted onto the connector.

[0030] The anchoring device provided by the present invention has the following beneficial effects:

[0031] By arranging the distal anchor and the proximal anchor on the connecting piece, the connecting piece is used to limit the distal anchor's movement relative to the connecting piece toward the distal end, and is used to limit the proximal anchor's movement relative to the connecting piece toward the proximal end, thereby realizing the connection between the distal anchor and the connecting piece, and the connection between the proximal anchor and the distal anchor. Since the proximal anchor is arranged on the connecting piece and the connecting piece can limit the proximal anchor's movement relative to the connecting piece toward the proximal end, the effectiveness and stability of the connection between the proximal anchor and the connecting piece can be improved, thereby improving the effectiveness and stability of the anchoring of the anchoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cross-sectional schematic diagram of the anchoring device after the proximal anchoring and the distal anchoring are released in the first embodiment of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the proximal anchoring and distal anchoring post-gripping anchoring device in the first embodiment of the present invention;

[0034] Figure 3 is a schematic diagram of the structure of the distal anchor in a released state in the first embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of the structure of the proximal anchor in a released state in the first embodiment of the present invention;

[0036] Figure 5 is a cross-sectional view of the proximal anchor in the released state in the first embodiment of the present invention;

[0037] Figure 6It is a schematic structural view of the connector in the first embodiment of the present invention;

[0038] Figure 7 It is a partial sectional view of the connector in the first embodiment of the present invention;

[0039] Figure 8 It is a schematic structural view of the proximal anchoring and the connector in the first connection state in the first embodiment of the present invention;

[0040] Figure 9 It is a schematic structural view of the proximal anchoring and the connector in the second connection state in the first embodiment of the present invention;

[0041] Figure 10 It is a schematic structural view of the anchoring device pressed on the puncture needle in the first embodiment of the present invention;

[0042] Figure 11 It is a schematic structural view of the anchoring device implanted into the urethra in the first embodiment of the present invention;

[0043] Figure 12 It is a partial sectional view of the connector in the second embodiment of the present invention;

[0044] Figure 13 It is a sectional view of the distal anchoring in the released state in the third embodiment of the present invention;

[0045] Figure 14 It is a sectional view of the distal anchoring arm and the distal anchoring wing of the distal anchoring in the third embodiment of the present invention after being flattened under extrusion;

[0046] Figure 15 It is a sectional view of the proximal anchoring in the released state in the fourth embodiment of the present invention;

[0047] Figure 16 It is a partial structural view of the proximal anchoring in the fourth embodiment of the present invention;

[0048] Figure 17 It is a schematic structural view of the proximal anchoring and the connector in the third connection state in the fourth embodiment of the present invention;

[0049] Figure 18 It is a schematic structural view of the proximal anchoring and the connector in the fourth connection state in the fourth embodiment of the present invention;

[0050] Figure 19 It is a schematic structural view of the distal anchoring in the released state in the fifth embodiment of the present invention;

[0051] Figure 20 It is a schematic structural view of the anchoring device implanted into the urethra in the fifth embodiment of the present invention;

[0052] Figure 21It is a schematic structural diagram of the distal anchor in the released state in the sixth embodiment of the present invention.

[0053] Explanation of reference numerals:

[0054] 100 - Anchoring device;

[0055] 110 - Distal anchor; 111 - Distal main body; 112 - Distal connecting arm; 113 - Distal anchoring wing; 114 - First protrusion; 115 - Positioning protrusion

[0056] 120 - Proximal anchor; 121 - Proximal main body; 122 - Proximal connecting arm; 123 - Proximal anchoring wing; 124 - Second protrusion; 125 - Proximal locking member; 126 - Proximal elastic piece part; 127 - Proximal locking main body; 129 - Proximal window;

[0057] 130 - Connecting piece; 131 - Main body section; 132 - Distal connecting section; 133 - Positioning groove; 134 - Proximal connecting section; 135 - Proximal connecting main body; 136 - Proximal limiting part; 137 - First proximal limiting part; 138 - Second proximal limiting part;

[0058] 200 - Puncture needle. Detailed implementation manners

[0059] The core object of the present invention is to provide an anchoring device. The anchoring device cooperates with the proximal anchor through the connecting piece to achieve one - way locking of the connecting piece and the proximal anchor, thereby reducing the risk of the proximal anchor shifting and falling off relative to the connecting piece.

[0060] Furthermore, by providing at least one locking member on the proximal anchor and the distal anchor, the proximal anchor and the distal anchor can be in full contact with the tissue, enhancing the effectiveness and stability of the anchoring.

[0061] Furthermore, by symmetrically providing at least two anchoring wings on the proximal anchor and the distal anchor, the stability of the proximal anchor and the distal anchor can be improved, and further the effectiveness and stability of the anchoring can be enhanced.

[0062] Furthermore, by providing at least one protrusion on the proximal anchor and the distal anchor, the surfaces of the proximal anchor and the distal anchor can be made rough, thereby enhancing the effectiveness and stability of the anchoring.

[0063] The following further details the anchoring device proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non - precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0064] Embodiment 1

[0065] This embodiment provides an anchoring device 100. Refer to Figure 1 and Figure 2 , Figure 1 which is a schematic cross-sectional view of the anchoring device 100 after the proximal anchoring 120 and the distal anchoring 110 are released in the first embodiment of the present invention, Figure 2 and which is a schematic structural view of the anchoring device 100 after the proximal anchoring 120 and the distal anchoring 110 are compressed and held in the first embodiment of the present invention. The anchoring device 100 includes a distal anchoring 110, a proximal anchoring 120, and a connecting member 130.

[0066] Refer to Figure 1 , Figure 2 and Figure 3 , Figure 3 which is a schematic structural view of the distal anchoring 110 in the released state in the first embodiment of the present invention. The distal anchoring 110 includes a distal main body 111, a distal connecting arm 112, and a distal anchoring wing 113. The proximal end of the distal main body 111 is fixedly connected to one end of the distal connecting arm 112, the other end of the distal connecting arm 112 is fixedly connected to one end of the distal anchoring wing 113, and the other end of the distal anchoring wing 113 is a free end.

[0067] As Figure 1 and Figure 2 shown, the distal anchoring 110 has a released state and a compressed and held state. In the released state, the distal connecting arm 112 and the distal anchoring wing 113 are opened, the distal connecting arm 112, the distal anchoring wing 113, and the distal main body 111 form a V shape, and the distal anchoring wing 113 is linear. The included angle between the free end of the distal anchoring wing 113 and the distal main body 111 is less than 90°. In the compressed and held state, the distal connecting arm 112 and the distal anchoring wing 113 are folded on the connecting member 130.

[0068] As Figure 3 shown, the distal main body 111 is tubular. One end of the distal connecting arm 112 is fixedly connected to the tube wall of the distal main body 111.

[0069] As Figure 3As shown, the number of the distal connecting arms 112 is two, and the number of the distal anchoring wings 113 is two. The proximal end of the distal main body 111 is fixedly connected to one end of the two distal connecting arms 112, and the other ends of the two distal anchoring wings 113 are free ends. The number of the distal anchoring wings 113 is two, so as to improve the stability of the anchoring of the distal anchor 110. Preferably, the two distal anchoring wings 113 are symmetrically arranged with respect to the distal main body 111, so that the supporting force can be evenly distributed on the distal anchoring wings 113, and thus the stability of the anchoring of the distal anchor 110 can be further improved. Further, the two distal connecting arms 112 are symmetrically arranged with respect to the distal main body 111.

[0070] In this embodiment, the surface of the distal anchoring wing 113 is rough. As Figure 3 shown, at least one first protrusion 114 is provided on the surface of the distal anchoring wing 113 to increase the roughness of the surface of the distal anchoring wing 113, so that the distal anchoring wing 113 is not easily displaced relative to the tissue, and the stability of the anchoring of the distal anchoring wing 113 is improved. The first protrusion 114 is preferably serrated, so that the first protrusion 114 can better fit the tissue, and the stability of the anchoring of the distal anchoring wing 113 is further improved. In other embodiments, at least one first groove is formed on the surface of the distal anchoring wing 113 to increase the roughness of the surface of the distal anchoring wing 113.

[0071] The distal main body 111, the distal connecting arms 112 and the distal anchoring wings 113 are integrally formed.

[0072] In this embodiment, the distal anchor is formed by cutting a pipe. The distal anchoring wing includes a fifth surface, a sixth surface opposite to the fifth surface, and a seventh surface and an eighth surface connecting the fifth surface and the sixth surface. The fifth surface corresponds to the outer surface of the pipe, the sixth surface corresponds to the inner surface of the pipe, the seventh surface and the eighth surface correspond to two cutting surfaces of the pipe, and the first protrusion and / or the first groove is provided on the seventh surface and the eighth surface. In other embodiments, it can also be manufactured by other methods, and the present invention does not limit this.

[0073] The distal connecting arms 112 and the distal anchoring wings 113 are made of a shape memory material. Thus, the compressed distal anchor 110 can be restored to a herringbone shape in the released state.

[0074] The distal anchor 110 can be made of an elastic material, including but not limited to metals, polymers, etc. Typical examples of such materials include but are not limited to nickel-titanium alloys, stainless steel 304, stainless steel 316, polyurethane and nylon.

[0075] Reference Figure 4and Figure 5 , Figure 4 is a schematic diagram of the structure of the proximal anchor 120 in the released state in the first embodiment of the present invention, Figure 5 1 is a cross-sectional view of the proximal anchor 120 in the first embodiment of the present invention in the released state, wherein the proximal anchor 120 comprises a proximal body 121, a proximal connecting arm 122, a proximal anchor wing 123 and a proximal locking member 125. The distal end of the proximal body 121 is fixedly connected to one end of the proximal connecting arm 122, the other end of the proximal connecting arm 122 is fixedly connected to one end of the proximal anchor wing 123, the other end of the proximal anchor wing 123 is a free end, and the proximal end of the proximal body 121 is connected to the proximal locking member 125.

[0076] like Figure 1 and Figure 2 As shown, the proximal anchor 120 has a release state and a gripping state. In the release state, the proximal connecting arm 122 and the proximal anchoring wing 123 are open, and the proximal connecting arm 122, the proximal anchoring wing 123 and the proximal body 121 are in a herringbone shape. The angle between the free end of the proximal anchoring wing 123 and the axis of the proximal body 121 is less than 90°. In the gripping state, the proximal connecting arm 122 and the distal anchoring wing 113 are folded on the connecting member 130.

[0077] like Figure 4 and Figure 5 As shown, the proximal body 121 is tubular. One end of the proximal connecting arm 122 is fixedly connected to the tube wall of the proximal body 121.

[0078] like Figure 4 and Figure 5 As shown, the number of the proximal connecting arms 122 is two, and the number of the proximal anchoring wings 123 is two. The proximal end of the proximal body 121 is fixedly connected to one end of the two proximal connecting arms 122, and the other ends of the two proximal anchoring wings 123 are both free ends. The number of the proximal anchoring wings 123 is two, which can improve the stability of the proximal anchor 120. Preferably, the two proximal anchoring wings 123 are symmetrically arranged with respect to the proximal body 121, so that the supporting force can be evenly distributed on the proximal anchoring wings 123, which can further improve the stability of the proximal anchor 120. Furthermore, the two proximal connecting arms 122 are symmetrically arranged with respect to the proximal body 121.

[0079] like Figure 4 and Figure 5As shown, in the released state, the proximal anchoring wings 123 are linear. The two proximal anchoring wings 123 are symmetrically distributed on both sides of the proximal body 121, and the included angle α between the two proximal anchoring wings 123 can be between 90° and 180°.

[0080] In this embodiment, the surface of the proximal anchoring wing 123 is rough. As Figure 4 and Figure 5 shown, at least one second protrusion 124 is provided on the narrow side wall of the proximal anchoring wing 123 to increase the roughness of the surface of the proximal anchoring wing 123, so that the proximal anchoring wing 123 is not easily displaced relative to the tissue, and the anchoring stability of the proximal anchoring wing 123 is improved. The second protrusion 124 is preferably serrated, so that the second protrusion 124 can better fit the tissue and further improve the anchoring stability of the proximal anchoring wing 123. In other embodiments, at least one second groove is provided on the surface of the proximal anchoring wing 123 to increase the roughness of the surface of the distal anchoring wing 113.

[0081] The proximal locking member 125 is fixedly connected to the proximal end of the proximal body 121. As Figure 4 and Figure 5 shown, the proximal locking member 125 includes three proximal elastic sheet portions 126. The fixed end of the proximal elastic sheet portion 126 is connected to the tube wall at the proximal end of the proximal body 121, and the other end of the proximal elastic sheet portion 126 is a free end. The distance between the fixed end of the proximal elastic sheet portion 126 and the axis of the proximal body 121 is greater than the distance between the free end of the proximal elastic sheet portion 126 and the axis of the proximal body 121. In other embodiments, the number of the proximal elastic sheet portions 126 can also be two or four, and the present invention does not limit this.

[0082] The proximal body 121, the proximal connecting arm 122, the proximal anchoring wing 123 and the proximal locking member 125 are integrally formed.

[0083] Specifically, in this embodiment, the proximal anchor is formed by cutting a pipe. The proximal anchoring wing includes a first surface, a second surface opposite to the first surface, and a third surface and a fourth surface connecting the first surface and the second surface. The first surface corresponds to the outer surface of the pipe, the second surface corresponds to the inner surface of the pipe, the third surface and the fourth surface correspond to the two cut surfaces of the pipe, and the second protrusion and / or the second groove are provided on the third surface and the fourth surface.

[0084] In other embodiments, it can also be manufactured by other methods, and the present invention does not limit this.

[0085] The proximal connecting arm 122, the proximal anchoring wing 123 and the proximal locking member 125 can be made of shape memory material. In this way, the pressed proximal anchor 120 can resume its herringbone shape in the released state.

[0086] The proximal anchor 120 can be made of elastic materials, including but not limited to metals, polymers, etc. Typical examples of such materials include but are not limited to nitinol, stainless steel 304, stainless steel 316, polyurethane, and nylon.

[0087] Reference Figure 6 and Figure 7 , Figure 6 FIG. Figure 6 is a schematic structural view of the connecting member 130 in the first embodiment of the present invention. Figure 7 FIG. Figure 7 is a partial cross-sectional view of the connecting member 130 in the first embodiment of the present invention. The connecting member 130 includes a main body section 131, a distal connecting section 132, and a proximal connecting section 134.

[0088] The distal end of the main body section 131 is fixedly connected to the distal connecting section 132, and the proximal end of the main body section 131 is fixedly connected to the proximal connecting section 134.

[0089] The distal connecting section 132 is used to restrict the distal anchor 110 from moving relative to the connecting member 130 towards the distal end of the connecting member 130.

[0090] Specifically, as shown in FIG. Figure 6 , the diameter of the distal connecting section 132 is greater than the inner diameter of the tube wall of the distal main body 111, and the inner diameter of the tube wall of the distal main body 111 is slightly greater than the diameter of the main body section 131. The distal main body 111 is sleeved on the main body section 131, and the distal connecting section 132 is located at the distal end of the distal main body 111. Since the diameter of the distal connecting section 132 is greater than the inner diameter of the tube wall of the distal main body 111, the distal connecting section 132 can restrict the distal main body 111 from moving relative to the connecting member 130 towards the distal end of the connecting member 130. The diameter of the distal connecting section 132 is greater than the diameter of the main body section 131.

[0091] In this embodiment, the distal connecting section 132 is a protrusion extending from the distal end of the main body section 131. In one embodiment, the distal connecting section 132 is preferably formed by hot melting, and the diameter of the distal connecting section 132 is made greater than the inner diameter of the tube wall of the main body section 131. In another embodiment, the distal connecting section 132 can also be made by tying a knot.

[0092] The proximal main body 121 is sleeved on the proximal connecting section 134, and the proximal connecting section 134 is used to restrict the proximal anchor 120 from moving relative to the connecting member 130 towards the proximal end of the connecting member 130.​​

[0093] Specifically, the proximal connection segment 134 includes a proximal connection body 135 and at least one proximal limiting portion 136. The proximal limiting portion 136 is disposed on the outer surface of the proximal connection body 135. The proximal limiting portion 136 cooperates with the proximal locking member 125 to limit the free end of the proximal locking member 125 from moving proximally toward the proximal end of the connecting member 130. Wherein, the distance between the free end of the proximal spring piece portion 126 in the proximal locking member 125 and the axis of the proximal body 121 is less than or equal to the maximum outer diameter of the proximal limiting portion 136.

[0094] As Figure 7 shown, the number of the proximal limiting portions 136 is two, and the two proximal limiting portions 136 are sequentially arranged along the axial direction of the connecting member 130. Along the axial direction of the connecting member 130, the two proximal limiting portions 136 are respectively a first proximal limiting portion 137 and a second proximal limiting portion 138. When the proximal anchor 120 moves distally relative to the connecting member 130 toward the distal end of the connecting member 130, the proximal locking member 125 can first cooperate with the first proximal limiting portion 137 on the proximal connection segment 134. When the proximal anchor 120 moves further distally relative to the connecting member 130 toward the distal end of the connecting member 130, the proximal locking member 125 can cooperate with the second proximal limiting portion 138 on the proximal connection segment 134. Since the proximal locking member 125 can cooperate with the first proximal limiting portion 137 and the second proximal limiting portion 138, the proximal anchor 120 can be connected to the proximal limiting portions 136 at different positions on the connecting member 130, so that the distance between the proximal anchor 120 and the distal anchor 110 can be adjusted, that is, the degree of tightening the tissue by the proximal anchor 120 and the distal anchor 110 can be adjusted.

[0095] In other embodiments, the number of the proximal limiting portions 136 can also be one, three, four or others, and the present invention does not limit this. In other embodiments, the maximum outer diameter of the first proximal limiting portion 137 can be the same as the maximum outer diameter of the second proximal limiting portion 138, or the proximal limiting portions 136 are sequentially arranged along the axial direction of the proximal connection body 135, and the maximum outer diameter of the proximal limiting portions 136 increases sequentially from the proximal end to the distal end of the connecting member 130.

[0096] Preferably, the maximum outer diameter of the first proximal limiting portion 137 is smaller than the maximum outer diameter of the second proximal limiting portion 138. Since the maximum outer diameter of the first proximal limiting portion 137 is smaller than the maximum outer diameter of the second proximal limiting portion 138, during the process that the proximal anchor 120 moves from the proximal end to the distal end of the connecting member 130 in sequence, the force exerted by the proximal limiting portion 136 on the proximal locking member 125 becomes greater and greater, so as to facilitate the operator to judge the position of the proximal anchor 120 relative to the connecting member 130. In addition, it is also convenient to assemble the proximal anchor 120 from the proximal end of the connecting member 130 onto the connecting member 130.

[0097] Preferably, the outer diameter of the proximal connecting body 135 is smaller than the pipe diameter of the proximal body 121 of the proximal anchor 120, so as to facilitate the assembly of the proximal anchor 120 from the proximal end of the connecting member 130 onto the connecting member 130.

[0098] As Figure 7 shown, the proximal limiting portion 136 is at least one protrusion extending from the outer surface of the proximal connecting body 135. As Figure 7 shown, in the axial cross-section of the connecting member 130, the protrusion is serrated.

[0099] The connecting member 130 can be made of an elastic material, including but not limited to metals, polymers, etc. Typical examples of such materials include but are not limited to nitinol, stainless steel 304, stainless steel 316, polyurethane, and nylon.

[0100] The connecting member 130 is preferably integrally formed. For example, the proximal connecting section 134 can be made by wire cutting, and the distal connecting section 132 can also be made by knotting or heat melting.

[0101] Figure 8 is a schematic structural diagram of the proximal anchor 120 and the connecting member 130 in the first connection state in the first embodiment of the present invention. As Figure 8 shown, in the first connection state, the proximal body 121 of the proximal anchor 120 and the proximal locking member 125 are sleeved on the proximal connecting section 134 of the connecting member 130, and the proximal locking member 125 does not cooperate with the proximal limiting portion 136 on the proximal connecting section 134.

[0102] Figure 9 is a schematic structural diagram of the proximal anchor 120 and the connecting member 130 in the second connection state in the first embodiment of the present invention. As Figure 9As shown, in the second connection state, the proximal main body 121 of the proximal anchor 120 and the proximal locking member 125 are sleeved on the proximal connection section 134 of the connecting member 130, and the proximal locking member 125 cooperates with the first proximal limiting portion 137 on the proximal connection section 134. Of course, the proximal anchor 120 can further move distally towards the connecting member 130 so that the proximal locking member 125 cooperates with the second proximal limiting portion 138 on the proximal connection section 134. After the proximal locking member 125 cooperates with the proximal limiting portion 136 on the proximal connection section 134, the proximal connection main body 135 of the proximal limiting portion 136 near the proximal end that cooperates with the proximal locking member 125 can be cut or thermally severed.

[0103] The process of implanting the anchoring device 100 into the urethra for treating the prostate is as follows:

[0104] First, load the anchoring device 100 into the puncture needle 200. The distal anchor 110 and the proximal anchor 120 are in a compressed state. The distal main body 111 of the distal anchor 110 is sleeved on the main body section 131 of the connecting member 130. The distal connection section 132 of the connecting member 130 is arranged at the distal end of the distal main body 111. The distal connection arm 112 and the distal anchor wing 113 of the distal anchor 110 are compressed by the puncture needle 200 on the connecting member 130; the proximal main body 121 of the proximal anchor 120 is sleeved on the main body section 131 of the connecting member 130. The proximal connection section 134 of the connecting member 130 is arranged at the distal end of the proximal locking member 125 in the proximal anchor 120. The first proximal limiting portion 137 and the second proximal limiting portion 138 of the connecting member 130 do not cooperate with the proximal locking member 125 of the proximal anchor 120. The proximal anchor 120 can move distally relative to the connecting member 130. The proximal connection arm 122 and the proximal anchor wing 123 of the proximal anchor 120 are compressed by the puncture needle 200 on the connecting member 130; the distal anchor 110 and the proximal anchor 120 are connected in series through the connecting member 130. The schematic structural diagram of the anchoring device 100 compressed in the puncture needle 200 is as Figure 10 shown, Figure 10 which is the schematic structural diagram of the anchoring device 100 compressed in the puncture needle 200 in Embodiment 1 of the present invention.

[0105] Secondly, release the puncture needle 200 and make the puncture needle 200 penetrate the hyperplastic prostate tissue.

[0106] Secondly, the puncture needle 200 is retracted to release the distal anchor 110 and place the distal anchor 110 inside the prostate tissue. At this time, the distal anchor 110 is in a released state, and the distal anchor wings 113 of the distal anchor 110 are in contact with the prostate tissue.

[0107] After that, the proximal anchor 120 is delivered, and the proximal anchor 120 is moved distally relative to the connecting member 130 towards the distal end of the connecting member 130 to release the proximal anchor 120 and place the proximal anchor 120 in a released state.

[0108] After that, the proximal anchor 120 continues to move distally relative to the connecting member 130, causing the proximal anchor wings 123 of the proximal anchor 120 to contact the prostate tissue.

[0109] Then, the proximal anchor 120 continues to move distally relative to the connecting member 130 until the proximal locking member 125 of the proximal anchor 120 cooperates with the proximal limiting portion 136 in the connecting member 130, and the prostate tissue is contracted by the proximal anchor 120 and the distal anchor 110, thereby mechanically separating the left and right lobes of the prostate and pushing the prostate tissue compressing the urethra back to a distant place. As Figure 11 shown, Figure 11 FIG. 13 is a schematic structural diagram of the anchoring device 100 implanted in the urethra according to the first embodiment of the present invention. The distal anchor wings 113 of the distal anchor 110 and the proximal anchor wings 123 of the proximal anchor 120 are in contact with the prostate tissue, and under the action of the connecting member 130, the prostate tissue is squeezed by the distal anchor 110 and the proximal anchor 120 to contract the prostate tissue. The proximal main body 121 of the proximal anchor 120 is provided at the proximal end of the proximal anchor wings 123, and the distal main body 111 of the distal anchor 110 is provided at the distal end of the distal anchor wings 113. The closing direction of the proximal anchor wings 123 faces the closing direction of the distal anchor wings 113. Under the action of the prostate tissue, the distal anchor wings 113 of the distal anchor 110 and the proximal anchor wings 123 of the proximal anchor 120 are further unfolded on the basis of the released state. The structure after the distal anchor wings 113 of the distal anchor 110 and the proximal anchor wings 123 of the proximal anchor 120 are further unfolded is as Figure 11 shown.

[0110] Then, finally, the connecting member 130 is cut to separate the anchoring device 100 from the delivery system, completing the implantation of one anchoring device 100.

[0111] After that, the above operations are repeated. According to the actual situation of the patient, generally 4 - 6 anchoring devices 100 need to be implanted. The schematic structural diagram of 4 anchoring devices 100 implanted in the urethra is as Figure 11As shown. In this embodiment, since both the proximal anchoring wing 123 and the distal anchoring wing 113 are linear after release, and the distal connection section 132 of the connecting member 130 is arranged at the distal end of the distal anchoring 110, and the proximal connection section 134 of the connecting member 130 is arranged at the proximal end of the proximal anchoring 120, the distal anchoring 110 and the proximal anchoring 120 are implanted to clamp the prostate tissue in a relative manner, and under the action of the prostate tissue, it is avoided that the distal anchoring 110 moves relative to the connecting member 130 towards the proximal end of the connecting member 130, and it is also avoided that the proximal anchoring 120 moves relative to the connecting member 130 towards the distal end of the connecting member 130, so that the anchoring device 100 is effectively anchored in the prostate tissue.

[0112] In this embodiment, the proximal anchoring 120 is restricted from moving unidirectionally relative to the connecting member 130 towards the proximal end of the connecting member 130 through the connecting member 130, so as to realize the connection between the proximal anchoring 120 and the connecting member 130. The distal anchoring 110 is restricted from moving unidirectionally relative to the connecting member 130 towards the distal end of the connecting member 130 through the distal connection section 132 of the connecting member 130, so as to realize the connection between the distal anchoring 110 and the connecting member 130. When the anchoring device 100 is implanted into the prostate tissue, the prostate tissue restricts the proximal anchoring 120 from moving towards the distal end of the connecting member 130, and restricts the distal anchoring 110 from moving towards the proximal end of the connecting member 130, so that the prostate tissue can be contracted through the anchoring device 100 to mechanically separate the left and right lobes of the prostate and push the prostate tissue compressing the urethra back to a distant place.

[0113] Among them, the proximal anchoring 120 includes a proximal main body 121 and a proximal locking member 125. The proximal locking member 125 is fixedly connected to the proximal end of the proximal main body 121. The connecting member 130 includes a main body section 131 and a proximal connection section 134. The proximal end of the main body section 131 is fixedly connected to the proximal connection section 134. The proximal main body 121 and the proximal locking member 125 are sleeved on the main body section 131. The proximal connection section 134 is used to restrict the proximal locking member 125 from moving relative to the connecting member 130 towards the proximal end of the connecting member 130. Since the proximal locking member 125 is sleeved on the main body section 131, the proximal connection section 134 is used to restrict the proximal locking member 125 from moving relative to the connecting member 130 towards the proximal end of the connecting member 130, and after the anchoring device 100 is implanted, the prostate tissue can restrict the proximal anchoring 120 from moving towards the distal end of the connecting member 130. Under the action of the prostate tissue, the acting force of the proximal connection section 134 on the proximal locking member 125 will become larger and larger. Therefore, it is not easy for the anchoring device 100 to cause the proximal anchoring 120 to slip off the connecting member 130 or make the connection between the proximal anchoring 120 and the connecting member 130 loose due to the action of the prostate tissue, so that the connection between the proximal anchoring 120 and the connecting member 130 can be stable.

[0114] In this embodiment, since the proximal anchoring member 120 includes a proximal body 121, a proximal connecting arm 122, a proximal anchoring wing 123, and a proximal locking member 125, the distal end of the proximal body 121 is fixedly connected to one end of the proximal connecting arm 122, the other end of the distal connecting arm 112 is fixedly connected to one end of the distal anchoring wing 113, the other end of the distal anchoring wing 113 is a free end, and the proximal end of the proximal body 121 is connected to the proximal locking member 125. Therefore, after the anchoring device 100 is implanted, the proximal anchoring wing 123 can come into contact with the prostate tissue, and the anchoring device 100 can exert a force on the prostate tissue through the proximal anchoring wing 123 to cause the prostate tissue to contract. At the same time, the connection between the prostate tissue and the proximal anchoring wing 123 can be stabilized, improving the anchoring effect of the anchoring device 100.

[0115] Furthermore, in this embodiment, the number of the proximal connecting arms 122 is two, the number of the proximal anchoring wings 123 is two, the proximal end of the proximal body 121 is fixedly connected to one end of the two proximal connecting arms 122, the other ends of the two proximal anchoring wings 123 are both free ends, and the number of the proximal anchoring wings 123 is two, so as to improve the anchoring stability of the proximal anchoring member 120.

[0116] In this embodiment, the proximal anchoring member 120 and the distal anchoring member 110 have a crimped state and a compressed state. The proximal anchoring member 120 and the distal anchoring member 110 in the anchoring device 100 can be crimped, for example, can be crimped in the puncture needle 200. In this case, the proximal anchoring member 120 and the distal anchoring member 110 are in the crimped state; the proximal anchoring member 120 and the distal anchoring member 110 in the anchoring device 100 can be released, for example, can be released from the puncture needle 200. In this case, the proximal anchoring member 120 and the distal anchoring member 110 are in the released state. Since the proximal anchoring member 120, the connecting member 130, and the distal anchoring member 110 in the anchoring device 100 can be simultaneously crimped in the puncture needle 200 and can be released from the same puncture needle 200, and during the implantation of the anchoring device 100, the distal anchoring member 110 and the connecting member 130 are in a connected state, and the proximal anchoring member 120 and the connecting member 130 are also in a connected state. Only by moving the proximal anchoring member 120 relative to the connecting member 130 towards the distal end of the connecting member 130 can the proximal anchoring member 120 be fixedly connected to the connecting member 130. Therefore, only one puncture needle 200 channel is required to implement the implantation of the anchoring device 100, and only by moving the proximal anchoring member 120 relative to the connecting member 130 towards the distal end of the connecting member 130 can the anchoring device 100 be effectively anchored in the prostate tissue. Thus, the structure of the delivery system for delivering the anchoring device 100 can be simplified.

[0117] Embodiment Two

[0118] This embodiment provides an anchoring device 100. The difference between the anchoring device 100 in this embodiment and the anchoring device 100 in the first embodiment is that the shape of the proximal connection section 134 of the connecting piece 130 is different.

[0119] Specifically, as Figure 12 shown, Figure 12 is a partial cross-sectional view of the connecting piece 130 in the second embodiment of the present invention. The proximal connection section 134 includes a proximal connection main body 135 and at least one proximal limiting portion 136. The proximal limiting portion 136 is provided on the outer surface of the proximal connection main body 135. The proximal limiting portion 136 cooperates with the proximal locking piece 125 to limit the free end of the proximal locking piece 125 from moving proximally towards the connecting piece 130. Among them, the distance between the free end of the proximal elastic piece portion 126 in the proximal locking piece 125 and the axis of the proximal main body 121 is less than or equal to the maximum outer diameter of the proximal limiting portion 136.

[0120] As Figure 12 shown, the proximal limiting portion 136 is at least one protrusion extending from the outer surface of the proximal connection main body 135. As Figure 12 shown, in the axial cross-section of the connecting piece 130, the protrusion is in the shape of a barbed spike.

[0121] Embodiment Three

[0122] This embodiment provides an anchoring device 100. Referring to Figure 13 and Figure 14 , Figure 13 is a cross-sectional view of the distal anchoring 110 in the released state in the third embodiment of the present invention, Figure 14 is a cross-sectional view of the distal connection arm 112 and the distal anchoring wing 113 of the distal anchoring 110 in the third embodiment of the present invention after being flattened under extrusion. The difference between the anchoring device 100 in this embodiment and the anchoring device 100 in the first embodiment is that at least one positioning protrusion 115 is provided on the inner surface of the distal main body 111 of the distal anchoring 110, and a positioning groove 133 that cooperates with the positioning protrusion 115 is provided on the outer surface of the main body section 131 of the connecting piece 130. The positioning protrusion 115 and the positioning groove 133 cooperate with each other to prevent the distal anchoring 110 from moving relative to the connecting piece 130 and from rotating relative to the connecting piece 130.

[0123] As Figure 14As shown, the two distal anchoring wings 113 are symmetrically distributed on both sides of the distal body 111, and the angle between the two distal anchoring wings 113 is β, which can be between 90° and 180°. When the angle β between the two distal anchoring wings 113 is equal to 180°, the distance between the free ends of the two distal anchoring wings 113 is L1, and the maximum distance between the proximal end of the distal body 111 and the two distal anchoring wings 113 is H.

[0124] In other embodiments, the distal anchor 110 and the connector 130 may be connected to each other only through the positioning protrusion 115 and the positioning groove 133 , and the connector 130 does not include the distal connecting section 132 .

[0125] Embodiment 4

[0126] This embodiment provides an anchoring device 100. The anchoring device 100 in this embodiment is different from the anchoring device 100 in the first embodiment in that the proximal anchor 120 is different.

[0127] refer to Figure 15 , Figure 15 1 is a cross-sectional view of the proximal anchor 120 in the fourth embodiment of the present invention in the released state, wherein the proximal anchor 120 comprises a proximal body 121, a proximal connecting arm 122, a proximal anchor wing 123 and a proximal locking member 125. The proximal end of the proximal body 121 is fixedly connected to one end of the proximal connecting arm 122, the other end of the proximal connecting arm 122 is fixedly connected to one end of the proximal anchor wing 123, the other end of the proximal anchor wing 123 is a free end, and the distal end of the proximal body 121 is connected to the proximal locking member 125.

[0128] The proximal anchor 120 has a release state and a grip state. In the release state, the proximal connecting arm 122 and the proximal anchoring wing 123 are open, and the proximal connecting arm 122, the proximal anchoring wing 123 and the proximal body 121 are in a "X" shape. Figure 15 As shown, the angle between the free end of the proximal anchoring wing 123 and the axis of the proximal body 121 is greater than 90°. In the pressed grip state, the proximal connecting arm 122 and the distal anchoring wing 113 are folded on the connecting member 130. When the proximal anchor 120 is implanted in the tissue, the free end of the proximal anchoring wing 123 can be inserted into the tissue, which can improve the anchoring performance of the proximal anchoring wing 123 and the anchoring effectiveness and anchoring stability of the anchoring device 100 compared to the proximal anchor 120 that is in a herringbone shape after release.

[0129] The proximal body 121 is tubular. One end of the proximal connecting arm 122 is fixedly connected to the tube wall of the proximal body 121 .

[0130] As Figure 15 shown, the number of the proximal connecting arms 122 is two, and the number of the proximal anchoring wings 123 is two. The proximal end of the proximal body 121 is fixedly connected to one end of the two proximal connecting arms 122, and the other ends of the two proximal anchoring wings 123 are free ends. The number of the proximal anchoring wings 123 is two, so that the stability of the proximal anchoring 120 can be improved. Preferably, the two proximal anchoring wings 123 are symmetrically arranged with respect to the proximal body 121, so that the stability of the proximal anchoring 120 can be further improved. Further, the two proximal connecting arms 122 are symmetrically arranged with respect to the proximal body 121.

[0131] As Figure 15 shown, in the released state, the proximal anchoring wings 123 are arc-shaped.

[0132] In this embodiment, the surface of the proximal anchoring wing 123 is rough. Specifically, at least one second protrusion 124 is provided on the surface of the proximal anchoring wing 123 to increase the roughness of the surface of the proximal anchoring wing 123, so that the proximal anchoring wing 123 is not easily displaced relative to the tissue, and the stability of the proximal anchoring wing 123 is improved. The second protrusion 124 is preferably serrated, so that the second protrusion 124 can better fit the tissue, and the stability of the proximal anchoring wing 123 is further improved. In other embodiments, at least one second groove is provided on the surface of the proximal anchoring wing 123 to increase the roughness of the surface of the distal anchoring wing 113.

[0133] The proximal locking member 125 is fixedly connected to the distal end of the proximal body 121. As Figure 15 shown, the proximal locking member 125 includes a proximal locking body 127 and three proximal elastic sheet portions 126.

[0134] The proximal locking body 127 is tubular. The proximal end of the proximal locking body 127 is connected to the distal end of the proximal body 121, and the distal end of the proximal locking body 127 is a free end.

[0135] Proximal windows 129 corresponding to the proximal elastic sheet portions 126 are provided on the proximal locking body 127. The proximal elastic sheet portions 126 extend from the edge of the distal end of the proximal window 129 into the inner cavity of the proximal locking body 127. One end of the proximal elastic sheet portion 126 close to the edge of the distal end of the proximal window 129 is a fixed end, and one end of the proximal elastic sheet portion 126 close to the inner cavity of the proximal locking body 127 is a free end.

[0136] The distance between the fixed end of the proximal elastic piece portion 126 and the axis of the proximal main body 121 is greater than the distance between the free end of the proximal elastic piece portion 126 and the axis of the proximal main body 121. In other embodiments, the number of the proximal windows 129 may also be two or four, and the number of the proximal elastic piece portions 126 corresponds to the number of the proximal windows 129, and the present invention does not limit this.

[0137] The distance between the other end of the proximal elastic piece portion 126 and the axis of the proximal main body 121 is less than or equal to the maximum outer diameter of the proximal limiting portion 136 in the proximal connecting section 134 of the connecting piece 130. Thus, when the proximal locking piece 125 is engaged with the proximal connecting section 134, the free end of the proximal elastic piece portion 126 abuts against the proximal limiting portion 136 in the proximal connecting section 134, thereby restricting the proximal anchor 120 from moving proximally relative to the connecting piece 130 towards the proximal end of the connecting piece 130.

[0138] The proximal main body 121, the proximal connecting arm 122, the proximal anchoring wing 123 and the proximal locking piece 125 are integrally formed. For example, it can be manufactured by means of pipe cutting. In other embodiments, it can also be manufactured by other means, and the present invention does not limit this.

[0139] Reference Figure 16 , Figure 16 FIG. is a partial structural schematic diagram of the proximal anchor 120 in the fourth embodiment of the present invention. The proximal locking main body 127 is integrally formed with the proximal elastic piece portion 126. The fixed end of the proximal elastic piece portion 126 is fixedly connected to the edge of the proximal window close to the distal end, and the free end of the elastic piece portion 126 extends into the lumen of the proximal locking main body 127. The proximal connecting arm 122, the proximal anchoring wing 123 and the proximal locking piece 125 can be made of shape memory material. Thus, the pressed proximal anchor 120 can be restored to a zigzag shape in the released state.

[0140] The proximal anchor 120 can be made of an elastic material, including but not limited to metals, polymers, etc. Typical examples of such materials include but are not limited to nickel-titanium alloys, stainless steel 304, stainless steel 316, polyurethane and nylon.

[0141] In this embodiment, the proximal main body 121 in the proximal anchor 120 can be sleeved on the connection, and the proximal connecting section 134 in the connecting piece 130 can be engaged with the proximal locking piece 125 in the proximal anchor 120 to restrict the proximal anchor 120 from moving proximally relative to the connecting piece 130 towards the proximal end of the connecting piece 130.

[0142] Specifically, Figure 17 FIG. is a structural schematic diagram of the proximal anchor 120 and the connecting piece 130 in the third connection state in the fourth embodiment of the present invention. AsFigure 17 As shown, in the third connection state, the proximal body 121 of the proximal anchor 120 and the proximal locking member 125 are sleeved on the proximal connection section 134 of the connection member 130, and the proximal locking member 125 does not cooperate with the proximal limiting portion 136 on the proximal connection section 134.

[0143] Figure 18 is a schematic structural diagram of the proximal anchor 120 and the connection member 130 in the fourth connection state in the fourth embodiment of the present invention. As Figure 18 shown, in the fourth connection state, the proximal body 121 of the proximal anchor 120 and the proximal locking member 125 are sleeved on the proximal connection section 134 of the connection member 130, and the proximal locking member 125 cooperates with the first proximal limiting portion 137 on the proximal connection section 134. Of course, the proximal anchor 120 can further move distally towards the connection member 130 so that the proximal locking member 125 cooperates with the second proximal limiting portion 138 on the proximal connection section 134. After the proximal locking member 125 cooperates with the proximal limiting portion 136 on the proximal connection section 134, the proximal connection main body 135 of the proximal limiting portion 136 near the proximal end that cooperates with the proximal locking member 125 can be cut or thermally cut. Embodiment Five

[0144] This embodiment provides an anchoring device 100. The difference between the anchoring device 100 in this embodiment and the anchoring device 100 in the fourth embodiment lies in that the distal anchor 110 is different.

[0145] Refer to Figure 19 , Figure 19 is a schematic structural diagram of the distal anchor 110 in the released state in the fifth embodiment of the present invention. The distal anchor 110 includes a distal body 111, a distal connecting arm 112, and a distal anchoring wing 113. The distal end of the distal body 111 is fixedly connected to one end of the distal connecting arm 112, the other end of the distal connecting arm 112 is fixedly connected to one end of the distal anchoring wing 113, and the other end of the distal anchoring wing 113 is a free end.

[0146] The distal anchor 110 has a released state and a crimped state. In the released state, the distal connecting arm 112 and the distal anchoring wing 113 are open, and the distal connecting arm 112, the distal anchoring wing 113, and the distal body 111 are in a shape of "J". As Figure 19As shown, the angle between the free end of the distal anchoring wing 113 and the axis of the distal body 111 is greater than 90°. In the pressed grip state, the distal connecting arm 112 and the distal anchoring wing 113 are folded on the connecting member 130. When the distal anchor 110 is implanted in the tissue, the free end of the distal anchoring wing 113 can be inserted into the tissue, which can improve the anchoring performance of the distal anchoring wing 113 and improve the anchoring effectiveness and anchoring stability of the anchoring device 100 compared to the distal anchor 110 that is in a herringbone shape after release.

[0147] The distal body 111 is tubular and fixedly connected to the connecting member 130 , and the connecting member 130 is used to limit the distal anchor 110 from moving toward the proximal end of the connecting member 130 .

[0148] like Figure 19 As shown, the number of the distal connecting arms 112 is two, and the number of the distal anchoring wings 113 is two. The distal end of the distal body 111 is fixedly connected to one end of the two distal connecting arms 112, and the other ends of the two distal anchoring wings 113 are both free ends. The number of the distal anchoring wings 113 is two, which can improve the stability of the distal anchor 110. Preferably, the two distal anchoring wings 113 are symmetrically arranged with respect to the distal body 111, which can further improve the stability of the distal anchor 110. Furthermore, the two distal connecting arms 112 are symmetrically arranged with respect to the distal body 111.

[0149] like Figure 19 As shown, in the released state, the distal anchoring wing 113 is arc-shaped.

[0150] In this embodiment, the surface of the distal anchoring wing 113 is rough. Specifically, at least one first protrusion 114 is provided on the surface of the distal anchoring wing 113 to increase the roughness of the surface of the distal anchoring wing 113, so that the distal anchoring wing 113 is not easy to move relative to the tissue, and the anchoring stability of the distal anchoring wing 113 is improved. The first protrusion 114 is preferably in a sawtooth shape, so that the first protrusion 114 can better fit the tissue and further improve the anchoring stability of the distal anchoring wing 113. In other embodiments, at least one groove is provided on the surface of the distal anchoring wing 113 to increase the roughness of the surface of the distal anchoring wing 113.

[0151] The distal body 111, the distal connecting arm 112 and the distal anchoring wing 113 are integrally formed. For example, they can be manufactured by cutting a tube, or in other embodiments, they can be manufactured by other methods, which are not limited by the present invention.

[0152] The distal connecting arm 112 and the distal anchoring wing 113 are made of shape memory material. In this way, the compressed distal anchor 110 can return to a C-shaped configuration in the released state.

[0153] The distal anchor 110 can be made of elastic materials, including but not limited to metals, polymers, etc. Typical examples of such materials include but are not limited to nitinol, stainless steel 304, stainless steel 316, polyurethane, and nylon.

[0154] Reference Figure 20 , Figure 20 FIG. is a schematic structural view of the anchoring device 100 implanted in the urethra in the fifth embodiment of the present invention. The distal anchoring wing 113 of the distal anchor 110 and the proximal anchoring wing 123 of the proximal anchor 120 are in contact with the prostate tissue. Under the action of the connecting member 130, the prostate tissue is squeezed by the distal anchor 110 and the proximal anchor 120 to cause the prostate tissue to contract. The free ends of the distal anchoring wing 113 and the proximal anchoring wing 123 can be inserted into the prostate tissue. At this time, the proximal main body 121 of the proximal anchor 120 is disposed at the distal end of the proximal anchoring wing 123, the distal main body 111 of the distal anchor 110 is disposed at the proximal end of the distal anchoring wing 113, and the folding direction of the proximal anchoring wing 123 is opposite to the folding direction of the distal anchoring wing 113.

[0155] In other embodiments, the proximal anchor 120 in the anchoring device may be the proximal anchor 120 in the first embodiment, and the distal anchor 110 may be the distal anchor 110 in the fifth embodiment.

[0156] Embodiment Six

[0157] This embodiment provides an anchoring device 100. The difference between the anchoring device 100 in this embodiment and the anchoring device 100 in the fifth embodiment is that the number of distal connecting arms 112 in the distal anchor 110 is three, and the number of distal anchoring wings 113 is three.

[0158] Reference Figure 21 , Figure 21 FIG. is a schematic structural view of the distal anchor 110 in the released state in the sixth embodiment of the present invention. The distal anchor 110 includes a distal main body 111, distal connecting arms 112, and distal anchoring wings 113. The distal end of the distal main body 111 is fixedly connected to one end of the distal connecting arm 112, the other end of the distal connecting arm 112 is fixedly connected to one end of the distal anchoring wing 113, and the other end of the distal anchoring wing 113 is a free end.

[0159] Such as Figure 21As shown, the number of the distal connecting arms 112 is three, and the number of the distal anchoring wings 113 is three. The distal end of the distal main body 111 is fixedly connected to one end of the three distal connecting arms 112, and the other ends of the three distal anchoring wings 113 are all free ends. The number of the distal anchoring wings 113 is three, so as to prevent the distal anchoring 110 from tilting after implantation and improve the stability of the anchoring. Preferably, the distances between one ends of the three distal anchoring wings 113 are equal, and the shapes of the three distal anchoring wings 113 are equal, so as to further improve the stability of the anchoring of the distal anchoring 110. Further, the distances between one ends of the three distal connecting arms 112 are equal.

[0160] In other embodiments, the number of the proximal connecting arms 122 in the proximal anchoring 120 is three, and the number of the proximal anchoring wings 123 is three. The proximal end of the proximal main body 121 is fixedly connected to one end of the three proximal connecting arms 122, and the other ends of the three proximal anchoring wings 123 are all free ends. The number of the proximal anchoring wings 123 is three, so as to improve the stability of the anchoring of the proximal anchoring 120. In some embodiments, the number of the proximal anchoring wings 123 of the proximal anchoring 120 and the number of the distal anchoring wings 113 of the distal anchoring 110 may be equal or unequal. The number of the proximal anchoring wings 123 of the proximal anchoring 120 and the number of the distal anchoring wings 113 of the distal anchoring 110 may be one to four.

[0161] Embodiment Seven

[0162] This embodiment provides an anchoring device. The difference between the anchoring device in this embodiment and the anchoring device in Embodiment One lies in that the distal anchoring 110 is different. In this embodiment, the connection manner between the distal anchoring 110 and the connecting piece 130 is the same as the connection manner of the proximal anchoring 120 in Embodiment One. In this embodiment, the distal anchoring 110 and the connecting piece 130 are also connected in a locking manner.

[0163] The distal anchoring 110 includes a distal main body 111, distal connecting arms 112, distal anchoring wings 113 and a distal locking piece. The proximal end of the distal main body 111 is fixedly connected to one end of the distal connecting arm 112, the other end of the distal connecting arm 112 is fixedly connected to one end of the distal anchoring wing 113, and the other end of the distal anchoring wing 113 is a free end. The distal locking piece is fixedly connected to the distal end of the distal main body 111. The distal locking piece includes at least one distal elastic piece portion. One end of the distal elastic piece portion is connected to the distal end of the distal main body 111, and the other end of the distal elastic piece portion is a free end

[0164] The connecting member 130 further includes a distal connecting section 132, and the distal end of the main body section 131 is fixedly connected to the proximal end of the distal connecting section 132. Among them, the distal main body 111 and the distal locking sleeve are sleeved on the main body section 131. The distance between the fixed end of the distal elastic piece portion and the axis of the distal main body 111 is greater than the distance between the free end of the distal elastic piece portion and the axis of the distal main body 111. The maximum outer diameter of the distal connecting section 132 is greater than or equal to the distance between the free end of the distal elastic piece portion and the axis of the distal main body 111.

[0165] The distal anchor 110 has a release state and a crimping state. In the release state, the distal connecting arm 112 and the distal anchor wing 113 are opened. The distal connecting arm 112, the distal anchor wing 113 and the distal main body 111 are in a V shape, and the distal anchor wing 113 is in a straight line shape. The included angle between the free end of the distal anchor wing 113 and the distal main body 111 is less than 90°. In the crimping state, the distal connecting arm 112 and the distal anchor wing 113 are folded on the connecting member 130.

[0166] The distal main body 111 is tubular. One end of the distal connecting arm 112 is fixedly connected to the tube wall of the distal main body 111.

[0167] The number of the distal connecting arms 112 is two, and the number of the distal anchor wings 113 is two. The proximal end of the distal main body 111 is fixedly connected to one end of the two distal connecting arms 112, and the other ends of the two distal anchor wings 113 are both free ends. The number of the distal anchor wings 113 is two, so as to improve the anchoring stability of the distal anchor 110. Preferably, the two distal anchor wings 113 are symmetrically arranged with respect to the distal main body 111, so that the supporting force can be evenly distributed on the distal anchor wings 113, and thus the anchoring stability of the distal anchor 110 can be further improved. Further, the two distal connecting arms 112 are symmetrically arranged with respect to the distal main body 111.

[0168] The surface of the distal anchor wing 113 is rough. At least one first protrusion 114 is provided on the surface of the distal anchor wing 113 to increase the roughness of the surface of the distal anchor wing 113, so that the distal anchor wing 113 is not easily displaced relative to the tissue and the anchoring stability of the distal anchor wing 113 is improved. The first protrusion 114 is preferably serrated, so that the first protrusion 114 can better fit the tissue and further improve the anchoring stability of the distal anchor wing 113. In other embodiments, at least one first groove is formed on the surface of the distal anchor wing 113 to increase the roughness of the surface of the distal anchor wing 113.

[0169] The distal body 111, distal connecting arm 112, distal anchoring wing 113 and distal locking member are integrally formed.

[0170] In this embodiment, the distal anchoring is formed by cutting a pipe. The distal anchoring wing includes a fifth surface, a sixth surface opposite to the fifth surface, and a seventh surface and an eighth surface connecting the fifth surface and the sixth surface. The fifth surface corresponds to the outer surface of the pipe, the sixth surface corresponds to the inner surface of the pipe, the seventh surface and the eighth surface correspond to the two cut surfaces of the pipe, and the first protrusion and / or the first groove are provided on the seventh surface and the eighth surface.

[0171] The distal connecting arm 112 and the distal anchoring wing 113 are made of a shape memory material. Thus, the pressed distal anchoring 110 can be restored to a herringbone shape in the released state.

[0172] The distal anchoring 110 can be made of an elastic material, including but not limited to metals, polymers, etc. Typical examples of such materials include but are not limited to nitinol, stainless steel 304, stainless steel 316, polyurethane, and nylon.

[0173] Embodiment Eight

[0174] This embodiment provides an anchoring device. The difference between the anchoring device in this embodiment and the anchoring device in Embodiment Four lies in that the distal anchoring 110 is different. In this embodiment, the connection manner between the distal anchoring 110 and the connecting member 130 is the same as the connection manner of the proximal anchoring 120 in Embodiment Four. In this embodiment, the distal anchoring 110 and the connecting member 130 are also connected in a locking manner, and the locking structure between the distal anchoring 110 and the connecting member 130 in this embodiment is the same.

[0175] The distal anchoring 110 includes a distal body 111, a distal connecting arm 112, a distal anchoring wing 113 and a distal locking member. The distal end of the distal body 111 is fixedly connected to one end of the distal connecting arm 112, the other end of the distal connecting arm 112 is fixedly connected to one end of the distal anchoring wing 113, and the other end of the distal anchoring wing 113 is a free end.

[0176] The distal anchor 110 has a release state and a gripping state. In the release state, the distal connecting arm 112 and the distal anchoring wing 113 are open, and the distal connecting arm 112, the distal anchoring wing 113 and the distal body 111 are in a "F" shape. The angle between the free end of the distal anchoring wing 113 and the axis of the distal body 111 is greater than 90°. In the gripping state, the distal connecting arm 112 and the distal anchoring wing 113 are folded on the connecting piece 130. When the distal anchor 110 is implanted in the tissue, the free end of the distal anchoring wing 113 can be inserted into the tissue, which can improve the anchoring performance of the distal anchoring wing 113 compared to the distal anchor 110 in a "F" shape after release, and improve the anchoring effectiveness and anchoring stability of the anchoring device 100.

[0177] The distal body 111 is tubular. The distal locking member comprises a distal locking body and at least one distal elastic sheet portion, the distal end of the distal locking body is connected to the proximal end of the distal body 111, the proximal end of the distal locking body is a free end, a distal window corresponding to the distal elastic sheet portion is provided on the distal locking body, the distal elastic sheet portion extends from the proximal edge of the distal window to the inner cavity of the distal locking body, the end of the distal elastic sheet portion close to the proximal edge of the distal window is a fixed end, and the end of the distal elastic sheet portion close to the inner cavity of the distal locking body is a free end;

[0178] The connecting member 130 further includes a distal connecting segment 132, and the distal end of the main segment 131 is fixedly connected to the proximal end of the distal connecting segment 132.

[0179] Among them, the distal body 111 and the distal locking piece are sleeved on the main body section 131, the distance between the fixed end of the distal spring piece part and the axis of the distal body is greater than the distance between the free end of the distal spring piece part and the axis of the distal body, and the maximum outer diameter of the distal connecting section 132 is greater than or equal to the distance between the free end of the distal spring piece part and the axis of the distal body.

[0180] The number of the distal connecting arms 112 is two, and the number of the distal anchoring wings 113 is two. The distal end of the distal body 111 is fixedly connected to one end of the two distal connecting arms 112, and the other ends of the two distal anchoring wings 113 are both free ends. The number of the distal anchoring wings 113 is two, which can improve the stability of the distal anchor 110. Preferably, the two distal anchoring wings 113 are symmetrically arranged with respect to the distal body 111, which can further improve the stability of the distal anchor 110. Furthermore, the two distal connecting arms 112 are symmetrically arranged with respect to the distal body 111.

[0181] In the released state, the distal anchoring wing 113 is arc-shaped.

[0182] In this embodiment, the surface of the distal anchoring wing 113 is rough. Specifically, at least one first protrusion 114 is provided on the surface of the distal anchoring wing 113 to increase the roughness of the surface of the distal anchoring wing 113, so that the distal anchoring wing 113 is not easily displaced relative to the tissue, and the stability of the anchoring of the distal anchoring wing 113 is improved. The first protrusion 114 is preferably serrated, so that the first protrusion 114 can better fit the tissue, further improving the stability of the anchoring of the distal anchoring wing 113. In other embodiments, at least one groove is formed on the surface of the distal anchoring wing 113 to increase the roughness of the surface of the distal anchoring wing 113.

[0183] The distal body 111, the distal connecting arm 112, the distal anchoring wing 113 and the distal locking member are integrally formed. For example, it can be manufactured by means of pipe cutting, and in other embodiments, it can also be manufactured by other means, and the present invention does not limit this.

[0184] The distal connecting arm 112 and the distal anchoring wing 113 are made of shape memory material. Thus, the pressed distal anchor 110 can return to a J shape in the released state.

[0185] The distal anchor 110 can be made of an elastic material, including but not limited to metals, polymers, etc. Typical examples of such materials include but are not limited to nitinol, stainless steel 304, stainless steel 316, polyurethane, and nylon.

[0186] The anchoring device in the present invention can not only be used for the treatment of benign prostatic hyperplasia, but also contract other tissues for corresponding treatment. The present invention does not limit the specific application positions and application scenarios of the anchoring device.

[0187] The "proximal end" and "distal end" in the above embodiments are the relative orientations, relative positions, and directions of the elements or actions relative to each other from the perspective of a doctor using the medical device. Although the "proximal end" and "distal end" are not restrictive, the "proximal end" generally refers to the end of the medical device that is close to the doctor during normal operation, and the "distal end" generally refers to the end that first enters the patient's body. In addition, the term "or" in the above embodiments is generally used in the sense of including "and / or", unless otherwise explicitly stated. In the above embodiments, the "two ends" refer to the proximal end and the distal end.

[0188] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention according to the above disclosure are within the scope of protection of the claims.

Claims

1. An anchoring device, comprising a proximal anchor, a distal anchor and a connecting member, characterized in that, The distal anchor and the proximal anchor are sleeved on the connecting member. The connecting member is used to restrict the distal movement of the distal anchor relative to the connecting member and to restrict the proximal movement of the proximal anchor relative to the connecting member; The proximal anchor includes a proximal main body, a proximal locking member, and proximal anchor wings. The proximal locking member includes at least one proximal elastic piece portion. The connecting member includes a main body section and a proximal connecting section, and the proximal end of the main body section is fixedly connected to the proximal connecting section; Wherein, the proximal main body and the proximal locking member are sleeved on the proximal connecting section. The distance between the fixed end of the proximal elastic piece portion and the axis of the proximal main body is greater than the distance between the free end of the proximal elastic piece portion and the axis of the proximal main body. The maximum outer diameter of the proximal connecting section is greater than or equal to the distance between the free end of the proximal elastic piece portion and the axis of the proximal main body; The proximal connecting section includes a proximal connecting main body and at least one proximal limiting portion. The proximal limiting portion is annularly disposed around the outer surface of the proximal connecting main body. The distance between the free end of the proximal elastic piece portion and the axis of the proximal main body is less than or equal to the maximum outer diameter of the proximal limiting portion. The proximal limiting portion and the free end of the proximal elastic piece portion cooperate with each other to restrict the free end of the proximal locking member from moving proximally relative to the connecting member; The proximal locking member further includes a proximal locking main body. The proximal locking main body is tubular. The proximal end of the proximal locking main body is connected to the distal end of the proximal main body, and the distal end of the proximal locking main body is a free end. A proximal window corresponding to the proximal elastic piece portion is formed on the proximal locking main body. The proximal elastic piece portion extends from the edge of the distal end of the proximal window into the inner cavity of the proximal locking main body. One end of the proximal elastic piece portion close to the edge of the distal end of the proximal window is the fixed end, and one end of the proximal elastic piece portion close to the inner cavity of the proximal locking main body is the free end; The proximal anchor is formed by cutting a pipe. The proximal anchor wings include a first surface, a second surface opposite to the first surface, and a third surface and a fourth surface connecting the first surface and the second surface. The first surface corresponds to the outer surface of the pipe, the second surface corresponds to the inner surface of the pipe, and the third surface and the fourth surface correspond to the two cut surfaces of the pipe.

2. The anchoring device according to claim 1, characterized in that, The proximal locking member is fixedly connected to the proximal end of the proximal main body. The fixed end of the proximal elastic piece portion is connected to the proximal end of the proximal main body, and the other end of the proximal elastic piece portion is the free end.

3. The anchoring device according to claim 1, characterized in that The distal anchor includes a distal main body and a distal locking member. The distal locking member includes at least one distal elastic piece portion. The connecting member further includes a distal connecting section, and the distal end of the main body section is fixedly connected to the proximal end of the distal connecting section; Wherein, the distal main body and the distal locking member are sleeved on the distal connecting section. The distance between the fixed end of the distal elastic piece portion and the axis of the distal main body is greater than the distance between the free end of the distal elastic piece portion and the axis of the distal main body. The maximum outer diameter of the distal connecting section is greater than or equal to the distance between the free end of the distal elastic piece portion and the axis of the distal main body.

4. The anchoring device according to claim 3, characterized in that, The distal locking member is fixedly connected to the distal end of the distal main body. One end of the distal elastic piece portion is connected to the distal end of the distal main body, and the other end of the distal elastic piece portion is a free end.

5. The anchoring device according to claim 3, characterized in that, The distal locking member further includes a distal locking main body. The distal locking main body is tubular. The distal end of the distal locking main body is connected to the proximal end of the distal main body. The proximal end of the distal locking main body is a free end. A distal window corresponding to the distal elastic piece portion is formed on the distal locking main body. The distal elastic piece portion extends from the edge proximal to the distal window into the inner cavity of the distal locking main body. One end of the distal elastic piece portion close to the edge proximal to the distal window is a fixed end, and one end of the distal elastic piece portion close to the inner cavity of the distal locking main body is a free end.

6. The anchoring device according to any one of claims 3-5, characterized in that, The distal connection section includes a distal connection main body and at least one distal limiting portion. The distal limiting portion is arranged on the outer surface of the distal connection main body. The distal limiting portion cooperates with the free end of the distal elastic piece portion to limit the free end of the distal locking member from moving distally towards the connector.

7. The anchoring device according to claim 6, characterized in that, In the axial cross-section of the connector, the distal limiting portion is serrated or barbed.

8. The anchoring device according to claim 6, characterized in that The distal limiting portions are arranged in sequence along the axial direction of the distal connection main body. The maximum outer diameter of the distal limiting portions increases in sequence from the distal end to the proximal end of the connector.

9. The anchoring device according to claim 1, wherein The distal anchor includes a distal main body, a distal connection arm, and a distal anchor wing. The proximal end of the distal main body is fixedly connected to one end of the distal connection arm. The other end of the distal connection arm is fixedly connected to one end of the distal anchor wing. The other end of the distal anchor wing is a free end. The distal main body is fixedly connected to the connector. The distal anchor has a release state. In the release state, the distal anchor wing is linear; or The distal end of the distal main body is fixedly connected to one end of the distal connection arm. The other end of the distal connection arm is fixedly connected to one end of the distal anchor wing. The other end of the distal anchor wing is a free end. The distal main body is fixedly connected to the connector. The distal anchor has a release state. In the release state, the distal anchor wing is arc-shaped.

10. The anchoring device according to claim 9, characterized in that, At least one first protrusion is arranged on the surface of the distal anchor wing, or at least one first groove is formed.

11. The anchoring device according to claim 10, characterized in that, The distal anchor is formed by cutting a pipe. The distal anchor wing includes a fifth surface, a sixth surface opposite to the fifth surface, and a seventh surface and an eighth surface connecting the fifth surface and the sixth surface. The fifth surface corresponds to the outer surface of the pipe, the sixth surface corresponds to the inner surface of the pipe, the seventh surface and the eighth surface correspond to the two cut surfaces of the pipe, and the first protrusion and / or the first groove is arranged on the seventh surface and the eighth surface.

12. The anchoring device according to claim 11, wherein, There are at least two distal anchor wings.

13. The anchoring device according to claim 1, characterized in that, In the axial cross-section of the connector, the proximal limiting portion is serrated or barbed.

14. The anchoring device according to claim 1, characterized in that, The proximal limiting portions are arranged in sequence along the axial direction of the proximal connection main body. The maximum outer diameter of the proximal limiting portions increases in sequence from the proximal end to the distal end of the connector.

15. The anchoring device according to claim 1, characterized in that, The proximal anchor also includes a proximal connecting arm, the distal end of the proximal body is fixedly connected to one end of the proximal connecting arm, the other end of the proximal connecting arm is fixedly connected to one end of the proximal anchoring wing, the other end of the proximal anchoring wing is a free end, the proximal end of the proximal body is connected to the proximal locking member, the proximal locking member is used to limit the proximal anchoring relative to the connecting member to move toward the proximal end, the proximal anchoring has a released state, wherein in the released state, the proximal anchoring wing is linear; or, The proximal end of the proximal body is fixedly connected to one end of the proximal connecting arm, the other end of the proximal connecting arm is fixedly connected to one end of the proximal anchoring wing, the other end of the proximal anchoring wing is a free end, the distal end of the proximal body is connected to the proximal locking piece, the proximal anchoring has a released state, and in the released state, the proximal anchoring wing is arc-shaped.

16. The anchoring device according to claim 15, characterized in that, At least one second protrusion is arranged on the surface of the proximal anchoring wing, or at least one second groove is opened.

17. The anchoring device according to claim 16, characterized in that, The second protrusion and / or the second groove are arranged on the third surface and the fourth surface.

18. The anchoring device according to claim 15, characterized in that, There are at least two of the proximal anchoring wings.

19. The anchoring device according to claim 1, wherein, The proximal anchor has a release state and a gripping state. In the release state, the proximal anchor is in a "F" shape or a "V" shape. In the gripping state, the proximal anchor is folded onto the connecting piece. The distal anchor has a release state and a gripping state. In the release state, the distal anchor is in a "X" shape or a "V" shape. In the gripping state, the distal anchor is retracted on the connecting piece.

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