A suture ligating device for percutaneous venous vessel ligation

Abstract

The application provides a suture device for transdermal venous vessel ligation, which comprises a suture member, a guide member and an operating member; the suture member comprises a guide part and a suture thread, the end of the suture thread is provided with an elastic blocking member, the guide part is provided with a first guide cavity for the suture thread to penetrate, and the width of the elastic blocking member in the compressed state is greater than the diameter of the first guide cavity; the guide member is provided with a second guide cavity for the suture member to penetrate, and the end of the guide member is provided with a first connecting part; the operating member comprises a second connecting part, the second connecting part is rotationally connected with the first connecting part, the end of the operating member away from the second connecting part is provided with a channel for the elastic blocking member to penetrate, the second connecting part is provided with a third guide cavity for the suture member to penetrate, and the channel and the third guide cavity are oppositely arranged. The device solves the problem that the existing suture device is contrary to the conventional suture habit, is inconvenient to operate when penetrating into the tissue at the front end, and further reduces the doctor's suture feeling.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a suturing device for percutaneous venous ligation. Background Technology

[0002] High ligation of the great saphenous vein or superficial vein ligation is one of the important surgical treatments for varicose great saphenous veins. Traditional ligation methods require making an incision in the skin and then ligating the vein. This method is highly invasive and has a slow recovery time. Minimally invasive superficial vein ligation methods have emerged to address this need. Chinese patents CN209899494U disclose a ligator for percutaneous great saphenous vein ligation surgery, CN209136728U disclose a minimally invasive venous ligation suture device, and CN211131231U disclose a tubular tissue ligator. All three ligation devices can perform percutaneous minimally invasive ligation of the great saphenous vein. However, all three ligation devices are integrally molded, with the part inserted into the body and the part outside the body on the same axis. This structure deviates from conventional suturing habits (the axis of the needle and the needle holder are perpendicular), making operation inconvenient when inserting the tip into the tissue, thus reducing the surgeon's suturing feel.

[0003] Therefore, it is necessary to provide a ligation device for percutaneous venous ligation to solve the above-mentioned problems existing in the prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a ligation device for percutaneous venous ligation, particularly for the ligation of the great saphenous vein. This ligation device employs a rotating connection between the operating component and the guide component, which facilitates operation and solves the problem of ligation devices deviating from conventional suturing practices, causing inconvenience when inserting the tip into the tissue, thus reducing the surgeon's ligation feel. Furthermore, this device can complete suture embedding in a single suture, and the suture forming a loop within the body does not wrap around excessive perivascular tissue, resulting in a secure knot, good ligation effect, and reduced surgical trauma area, making it highly practical.

[0005] To achieve the above objectives, the present invention provides a ligation device for percutaneous venous ligation, comprising:

[0006] A suture assembly includes a guide portion and a suture thread. An elastic blocking member is provided at the end of the suture thread. The guide portion has a first guide cavity through which the suture thread passes. The width of the elastic blocking member in the compressed state is greater than the diameter of the first guide cavity.

[0007] The guide has a second guide cavity through which the sewing piece passes, and a first connecting part is provided at the end of the guide;

[0008] An operating component includes a second connecting portion, which is rotatably connected to the first connecting portion. The end of the operating component away from the second connecting portion has a channel through which the elastic blocking member passes. The second connecting portion has a third guide cavity through which the suturing member passes. The width of the elastic blocking member in its extended state is greater than the diameter of the channel, and the channel and the third guide cavity are arranged opposite to each other.

[0009] The beneficial effect of the suture device for percutaneous venous ligation of the present invention is that: the elastic blocking member blocks the suture at the top of the guide portion, preventing the suture from retracting into the guide portion; after the operating member enters the designated position in the human body, the guide portion drives the elastic blocking member and the suture to move towards the channel until the elastic blocking member penetrates the channel; since the width of the elastic blocking member in its extended state is greater than the diameter of the channel, the suture can connect with the operating member under the obstruction of the elastic blocking member, thus guiding the suture... The suture is pulled out of the body, and the operating component drives the suture pack around the blood vessel and brings the suture out of the body, thereby completing the knot of the suture; the second connecting part is rotatably connected to the first connecting part, which can facilitate operation and solve the problem that the suture ligation device is contrary to conventional suturing habits, and is inconvenient to operate when the front end is inserted into the tissue, thus reducing the doctor's suturing feel. In addition, the device can complete the suture embedding in one suture, and the suture forming a loop in the human body will not wrap around too many blood vessel surrounding tissues, the knot is firm, the suturing effect is good, and at the same time, it also reduces the surgical trauma area, making it highly practical.

[0010] Optionally, the suturing device further includes a connector, which comprises a first connector and a second connector that are adapted to each other. The first connecting portion and the second connecting portion are rotatably connected through the adaptation of the first connector and the second connector. The advantage is that providing the first connector and the second connector enables the first connecting portion and the second connecting portion to be rotatably connected, thereby making the suturing device easier to operate when the tip pierces the tissue.

[0011] Optionally, the first connecting part is a U-shaped structure, the first connecting member is a snap-fit ​​groove, and the first connecting part is provided with at least one of the snap-fit ​​grooves; the second connecting member is a snap-fit ​​block, and the second connecting part is provided with at least one of the snap-fit ​​blocks. The advantage is that the first connecting part and the second connecting part are rotatably connected through the snap-fit ​​block and the snap-fit ​​groove, thereby making the suture device easier to operate when the tip pierces the tissue.

[0012] Optionally, either the first connecting portion or the second connecting portion is provided with a positioning block, and the other of the first connecting portion and the second connecting portion is provided with a positioning groove adapted to the positioning block. The advantage is that the positioning block and the positioning groove allow the operating member and the guide member to be fixed in one position.

[0013] Optionally, the positioning groove includes a first positioning groove, a second positioning groove, and a third positioning groove. The first, second, and third positioning grooves are respectively located at different positions on the first connecting portion and close to the operating member, and the positioning block is located on the second connecting portion. The advantage of this is that the multiple positioning grooves allow the operating member and the guide member to be fixed in different orientations, thereby enabling the suturing device to be used flexibly.

[0014] Optionally, when the positioning block is engaged with the second positioning groove, the central axis of the channel, the central axis of the second guide cavity, and the central axis of the third guide cavity coincide. The beneficial effect is that when the central axes of the channel, the second guide cavity, and the third guide cavity coincide, the guide portion can smoothly move the elastic blocking member and the suture from the second guide cavity to the third guide cavity, and the elastic blocking member can pass through the channel, thereby allowing the ligation device to complete the wrapping of the blood vessel.

[0015] Optionally, the operating component includes a first operating part and a second operating part, wherein the first operating part and the second operating part are connected at an angle of 70° to 120°, and the second operating part is inclinedly connected to the second connecting part. The advantage is that the angled connection between the first and second operating parts (70° to 120°) allows the operating component to better enter the human body and smoothly reach the designated position.

[0016] Optionally, the operating component is a one-piece molded structure. Its advantages include: making the overall structure of the operating component more robust and preventing breakage between its components.

[0017] Optionally, the operating member further includes a tip, which is disposed at the end of the operating member away from the guide. The advantage of this is that the tip allows the suture device to be more easily inserted into the human body.

[0018] Optionally, the suturing device further includes a grip portion disposed outside the guide member. The advantage of this is that the grip portion increases friction between the grip portion and the hand, making the suturing device less likely to slip off the hand.

[0019] Optionally, the guide, the operating member, and the guide portion are made of stainless steel, while the grip portion is made of an elastic material. The advantages are: the stainless steel construction of the guide, the operating member, and the guide portion prevents deformation when the suture device enters the human body; and the elastic material of the grip portion increases comfort between the grip portion and the hand.

[0020] Optionally, the suture material can be either a non-absorbable material or an absorbable material.

[0021] Alternatively, the suture material can be a non-absorbable material. The advantages are that using a non-absorbable material allows the suture to maintain its effect for a longer period, and the non-absorbable material is inexpensive.

[0022] Alternatively, the suture material can be a bio-absorbable material. The advantage is that the bio-absorbable material can be absorbed by the body, eliminating the need for a second surgery to remove the suture, thus reducing harm to the body. Attached Figure Description

[0023] Figure 1 This is a cross-sectional structural schematic diagram of the suturing device in some embodiments of the present invention;

[0024] Figure 2 This is a schematic cross-sectional view of the sewing element in some embodiments of the present invention;

[0025] Figure 3 This is a cross-sectional structural diagram of the guide member in some embodiments of the present invention;

[0026] Figure 4 for Figure 3 A partially enlarged cross-sectional view of the guide component;

[0027] Figure 5 This is a schematic cross-sectional view of the operating component in some embodiments of the present invention, which is arc-shaped.

[0028] Figure 6 This is a schematic cross-sectional view of the operating component in some embodiments of the present invention, which is V-shaped.

[0029] Figure 7 for Figure 6 A partially enlarged cross-sectional view of the operating component;

[0030] Figure 8 This is a schematic diagram of the positioning block being snapped into the first positioning groove in some embodiments of the present invention;

[0031] Figure 9This is a schematic diagram of the positioning block being snapped into the second positioning groove in some embodiments of the present invention;

[0032] Figure 10 This is a schematic diagram of the positioning block being snapped into the third positioning groove in some embodiments of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but does not exclude other elements or objects.

[0034] To overcome the problems existing in the prior art, the purpose of this invention is to provide a suturing device for percutaneous venous ligation.

[0035] Figure 1 This is a cross-sectional structural schematic diagram of the suturing device in some embodiments of the present invention; Figure 2 This is a cross-sectional structural diagram of the sewing element in some embodiments of the present invention; Figure 3 This is a cross-sectional structural diagram of the guide member in some embodiments of the present invention; Figure 4 for Figure 3 A partially enlarged cross-sectional view of the guide component; Figure 5 This is a schematic cross-sectional view of the operating component in some embodiments of the present invention, which is arc-shaped. Figure 6 This is a schematic cross-sectional view of the operating component in some embodiments of the present invention, which is V-shaped. Figure 7 for Figure 6 A partially enlarged view of the cross-sectional structure of the operating component.

[0036] In embodiments of the present invention, reference is made to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7The suturing device 1 includes a suturing member 11, a guide member 12, and an operating member 13. The suturing member 11 includes a guide portion 111 and a suture 112. An elastic blocking member 113 is provided at the end of the suture 112. The guide portion 111 has a first guide cavity 1111 through which the suture 112 passes. The width of the elastic blocking member 113 in the compressed state is greater than the diameter of the first guide cavity 1111. The guide member 12 has a second guide cavity 121 through which the suturing member 11 passes. A first connecting portion is provided at the end of the guide member 12 (Figure 13). (Not shown in the figure); The operating member 13 includes a second connecting part 134, which is rotatably connected to the first connecting part (not shown in the figure). The operating member 13 has a channel 131 at one end away from the second connecting part 134 for the elastic blocking member 113 to pass through. The second connecting part 134 has a third guide cavity 1341 for the sewing member 11 to pass through. The width of the elastic blocking member 113 in the extended state is greater than the diameter of the channel 131, and the channel 131 and the third guide cavity 1341 are arranged opposite to each other.

[0037] Specifically, the elastic blocking member blocks the suture at the top of the guide portion, preventing the suture from retracting into the guide portion. After the operating member enters the designated position inside the body, the guide portion drives the elastic blocking member and the suture towards the channel until the elastic blocking member penetrates the channel. Since the width of the elastic blocking member in its extended state is greater than the diameter of the channel, the suture can connect with the operating member under the obstruction of the elastic blocking member, pulling the guide portion out of the body. The operating member then drives the suture bundle around the blood vessel and brings the suture out of the body, thus completing the knotting of the suture. The second connecting part is rotatably connected to the first connecting part, which facilitates operation and solves the problem that suture ligation devices deviate from conventional suturing habits, making operation inconvenient when the front end pierces the tissue, thus reducing the doctor's suturing feel. Furthermore, this device can complete the suture embedding in one suture. The suture forming a loop in the body does not wrap around too much tissue around blood vessels, resulting in a firm knot and good suturing effect. At the same time, it also reduces the surgical trauma area and is highly practical.

[0038] In some embodiments of the present invention, reference is made to Figure 1 , Figure 2 and Figure 7 The elastic blocking member 113 is triangular in shape. The maximum width of the elastic blocking member 113 in the compressed state is less than the diameter of the second guide cavity 121 and the diameter of the third guide cavity 1341, so that the guide part 111 drives the elastic blocking member 113 and the sewing thread 112 to move within the second guide cavity 121 and the third guide cavity 1341.

[0039] In some embodiments of the present invention, the second connecting part and the first connecting part are rotatable by an angle of -90° to +90°, that is, the...

[0040] In some embodiments of the present invention, the suturing device further includes a connector, which includes a first connector and a second connector that are adapted to each other. The first connecting part and the second connecting part are rotatably connected by the first connector and the second connector. The first connector and the second connector enable the first connecting part and the second connecting part to be rotatably connected, thereby making the suturing device easier to operate when the front end is inserted into the tissue.

[0041] In some specific embodiments of the present invention, the first connecting part is a U-shaped structure, the first connecting member is a snap-fit ​​groove, the first connecting part is provided with at least one snap-fit ​​groove, the second connecting member is a snap-fit ​​block, the second connecting part is provided with at least one snap-fit ​​block, and the first connecting part and the second connecting part are rotatably connected through the snap-fit ​​block and the snap-fit ​​groove, thereby making it more convenient to operate the suture device when the front end is inserted into the tissue.

[0042] In some other embodiments of the present invention, the first connecting part is a U-shaped structure, and the inner wall of the U-shaped structure is formed by a first end face and a second end face that are disposed opposite to each other.

[0043] In some more specific embodiments of the present invention, any one or both of the first end face and the second end face include a snap-fit ​​groove, the second connecting part includes a snap-fit ​​block (not shown in the figure) adapted to the snap-fit ​​groove, and the second connecting part and the first connecting part are rotatably connected by the snap-fit ​​block and the snap-fit ​​groove being adapted to each other.

[0044] In some specific embodiments of the present invention, reference is made to Figure 4 , Figure 5 and Figure 6 The first end face 122 includes a first snap-fit ​​groove 1224, the second end face 123 includes a second snap-fit ​​groove (not shown in the figure), the second connecting part 134 includes a first snap-fit ​​block 1342 adapted to the first snap-fit ​​groove 1224, and the second connecting part 134 includes a second snap-fit ​​block 1343 adapted to the second snap-fit ​​groove (not shown in the figure). The first connecting part (not shown in the figure) and the second connecting part 134 are rotatably connected by the adaptation of the first snap-fit ​​groove 1224 and the first snap-fit ​​block 1342, and the adaptation of the second snap-fit ​​groove (not shown in the figure) and the second snap-fit ​​block 1343.

[0045] In some embodiments of the present invention, either the first connecting portion or the second connecting portion is provided with a positioning block, and the other of the first connecting portion or the second connecting portion is provided with a positioning groove adapted to the positioning block.

[0046] In some specific embodiments of the present invention, either the second connecting part or the first end face is provided with a positioning block, and the other of the second connecting part and the first end face is provided with a positioning groove adapted to the positioning block. The positioning block and the positioning groove are provided so that the operating member and the guide member can be fixed in one position.

[0047] In some more specific embodiments of the present invention, the first end face is provided with the positioning block, and the second connecting part is provided with a positioning groove adapted to the positioning block.

[0048] In some more specific embodiments of the present invention, reference is made to Figure 4 and Figure 7 The second connecting part 134 is provided with the positioning block 1344, and the first end face 122 is provided with a positioning groove (not shown in the figure) that is adapted to the positioning block 1344.

[0049] In some embodiments of the present invention, reference is made to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The positioning groove (not shown in the figure) includes a first positioning groove 1221, a second positioning groove 1222, and a third positioning groove 1223. The first positioning groove 1221, the second positioning groove 1222, and the third positioning groove 1223 are respectively disposed at different positions on the first end face 122 and close to the operating member 13. The positioning block 1344 is disposed on the second connecting part 134. The guide member 12 and the operating member 13 are snapped into any one of the first positioning groove 1221, the second positioning groove 1222, and the third positioning groove 1223 by the positioning block 1344, thereby fixing the guide member 12 and the operating member 13 in one position. At the same time, multiple positioning grooves (not shown in the figure) are provided so that the operating member 13 and the guide member 12 can be fixed in different positions, thereby enabling the suturing device 1 to be used flexibly.

[0050] In some specific embodiments of the present invention, reference is made to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7When the positioning block 1344 is engaged in the first positioning groove 1221, the operating member 13 rotates relative to the guide member 12 to a first preset position (not shown in the figure), the central axis of the channel 113 coincides with the central axis of the third guide cavity 1341, and both the central axis of the channel 113 and the central axis of the third guide cavity 1341 are perpendicular to the central axis of the second guide cavity 121; when the positioning block 1344 is engaged in the second positioning groove 1222, the operating member 13 rotates relative to the guide member 12 to a second preset position (not shown in the figure), the channel 113... The central axis of the operating member 13, the central axis of the second guide cavity 121, and the central axis of the third guide cavity 1341 coincide; when the positioning block 1344 is engaged with the third positioning groove 1223, the operating member 13 rotates relative to the guide member 12 to a third preset position (not shown in the figure), the central axis of the channel 113 and the central axis of the third guide cavity 1341 coincide, and the central axis of the channel 113 and the central axis of the third guide cavity 1341 are both perpendicular to the central axis of the second guide cavity 121; the first preset position and the third preset position are set opposite to each other.

[0051] Figure 8 This is a schematic diagram of the positioning block being snapped into the first positioning groove in some embodiments of the present invention.

[0052] In some specific embodiments of the present invention, reference is made to Figure 8 When the positioning block 1344 is engaged with the first positioning groove 1221, the operating member 13 rotates relative to the guide member 12 to a first preset position.

[0053] Figure 9 This is a schematic diagram of the positioning block being snapped into the second positioning groove in some embodiments of the present invention.

[0054] In some specific embodiments of the present invention, reference is made to Figure 9 When the positioning block 1344 is engaged with the second positioning groove 1222, the operating member 13 rotates relative to the guide member 12 to the second preset position.

[0055] Figure 10 This is a schematic diagram of the positioning block being snapped into the third positioning groove in some embodiments of the present invention.

[0056] In some specific embodiments of the present invention, reference is made to Figure 10 When the positioning block 1344 is engaged with the second positioning groove 1223, the operating member 13 rotates relative to the guide member 12 to a third preset position.

[0057] In other specific embodiments of the present invention, reference is made to Figure 4The first positioning groove 1221, the second positioning groove 1222, and the third positioning groove 1223 are arranged around the snap-fit ​​groove 1224 and close to the side of the operating member 13. The first positioning groove 1221, the second positioning groove 1222, and the third positioning groove 1223 form a semicircle around the snap-fit ​​groove 1224. The first positioning groove 1221 and the third positioning groove 1223 are located at the two ends of the arc of the semicircle, and the second positioning groove 1222 is located at the midpoint of the arc of the semicircle.

[0058] In other specific embodiments of the present invention, reference is made to Figure 1 , Figure 4 and Figure 7 When the positioning block 1344 is engaged with the second positioning groove 1222, the central axis of the channel 131, the central axis of the second guide cavity 121 and the central axis of the third guide cavity 1341 coincide.

[0059] Specifically, when the positioning block 1344 is engaged with the second positioning groove 1222, the central axis of the channel 131, the central axis of the second guide cavity 121, and the central axis of the third guide cavity 1341 coincide, so that the guide part 111 can smoothly drive the elastic blocking member 113 and the suture 112 through the second guide cavity 121 and the third guide cavity 1341, thereby allowing the elastic blocking member 113 to pass through the channel 131. Under the action of the operating member 13, the elastic blocking member 113 and the suture 112 enable the ligation device 1 to complete the wrapping of the blood vessel.

[0060] In some embodiments of the present invention, the operating component includes a first operating part and a second operating part, wherein the first operating part and the second operating part are connected at an angle of 70° to 120°, and the second operating part is inclinedly connected to the second connecting part, so that the operating component can better enter the human body and smoothly reach the designated position.

[0061] In some embodiments of the present invention, the operating component is a one-piece molded structure, which makes the overall structure of the operating component more robust and prevents breakage between the components of the operating component.

[0062] Specifically, the one-piece molding structure refers to the first operating part and the second operating part being completed by a one-piece molding process. That is, the first operating part and the second operating part are made of the same material, and the material can be completed in a single processing without the need for secondary processing. Products using the one-piece molding process are relatively rare. The product has no welding marks, better quality, and a longer service life.

[0063] In some embodiments of the present invention, reference is made to Figure 5The operating member 13 is arc-shaped, and the junction of the first operating part 132 and the second operating part 133 is an arc-shaped structure. The included angle α between the first extension line 1321 of the first operating part 132 and the second extension line 1331 of the second operating part 133 is in the range of 70 to 120°.

[0064] In some specific embodiments of the present invention, the included angle α between the first extension line 1321 of the first operation part 132 and the second extension line 1331 of the second operation part 133 is any one of 70°, 80°, 90°, 100°, 110° and 120°.

[0065] In some other embodiments of the present invention, the included angle α between the first extension line 1321 of the first operation part 132 and the second extension line 1331 of the second operation part 133 is 100°.

[0066] In some embodiments of the present invention, reference is made to Figure 6 The operating member 13 is V-shaped, and the junction of the first operating part 132 and the second operating part 133 is at a sharp angle. The angle α between the reverse extension line of the first operating part 132 and the reverse extension line of the second operating part 133 is in the range of 70 to 120°.

[0067] In some specific embodiments of the present invention, the included angle α between the reverse extension line of the first operation part 132 and the reverse extension line of the second operation part 133 is any one of 70°, 80°, 90°, 100°, 110° and 120°.

[0068] In some other embodiments of the present invention, the angle α between the reverse extension line of the first operation part 132 and the reverse extension line of the second operation part 133 is 90°.

[0069] In some embodiments of the present invention, reference is made to Figure 1 , Figure 5 and Figure 6 The operating member 13 further includes a tip 135 located at the end of the operating member 13 away from the guide member 12.

[0070] In some embodiments of the present invention, reference is made to Figure 1 and Figure 3 The suturing device 1 also includes a gripping part 14, which is disposed outside the guide member 12.

[0071] The specific usage process is as follows:

[0072] An incision is made in the skin to allow the manipulator 13 to enter. The manipulator 13 is then inserted through the incision to the posterior side of the blood vessel. At this point, depending on the specific surgical procedure, the initial relative position of the manipulator 13 and the guide 12 is as follows: Figure 8 Or such as Figure 10 As shown; when the suture 11 reaches the third guide cavity 1341, keep the position of the operating member 13 unchanged, rotate the guide member 12, so that the relative position of the operating member 13 and the guide member 12 is as shown. Figure 9 As shown; push the suture ligator 11 so that the elastic blocking member 113 aligns with the channel 131, and then retract the guide part 111; pull back the operating member 13 through the guide member 12, and under the action of the operating member 13, the suture ligator 1 completes the wrapping of the blood vessel; continue to pull back the guide member 12 so that the operating member 13 is outside the body, at which point both ends of the suture 112 are outside the body; then use a surgical knotter to tie the suture 112 wrapped around the blood vessel.

[0073] In some embodiments of the present invention, the guide, the operating member, and the guide portion are made of stainless steel, and the grip portion is made of an elastic material. The stainless steel material of the guide, the operating member, and the guide portion makes the suture device less prone to deformation when it enters the human body; the elastic material of the grip portion increases the comfort between the grip portion and the hand.

[0074] In some specific embodiments of the present invention, the guide member, the operating member, and the guide portion are made of stainless steel 316L.

[0075] In some specific embodiments of the present invention, the material of the gripping part is an elastic material, and the elastic material is rubber.

[0076] In embodiments of the present invention, the suture material is either a non-absorbable material or an absorbable material.

[0077] In some embodiments of the present invention, the suture material is a non-absorbable material, which makes the suturing effect of the suturing device last longer, and the non-absorbable material is inexpensive.

[0078] In some other embodiments of the present invention, the suture material is a human absorbable material, eliminating the need for a second surgery to remove the suture from the body, thereby reducing harm to the human body.

[0079] Specifically, the international standard ISO 10993, the authoritative standard for the biological evaluation of medical devices, provides a clear definition: it refers to materials that can be degraded and absorbed in the biological environment of the body.

[0080] In some specific embodiments of the present invention, the human-absorbable materials can be mainly divided into three categories: polymeric materials, inorganic materials, and composite materials. Polymeric materials include absorbable gelatin, collagen, chitosan, cellulose, and polylactic acid. Inorganic materials mainly refer to biodegradable ceramics, namely tricalcium phosphate. Absorbable composite materials refer to materials composed of two or more different absorbable materials in an optimized combination, and can be divided into composites between polymeric materials, composites between polymeric materials and inorganic materials, and composites between materials and bioactive substances.

[0081] While embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of the invention as set forth in the claims. Furthermore, the invention described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. A ligation device for percutaneous venous ligation, characterized in that, include: A suture assembly includes a guide portion and a suture thread. An elastic blocking member is provided at the end of the suture thread. The guide portion has a first guide cavity through which the suture thread passes. The width of the elastic blocking member in the compressed state is greater than the diameter of the first guide cavity. The guide has a second guide cavity through which the sewing piece passes, and a first connecting part is provided at the end of the guide; An operating component includes a second connecting portion rotatably connected to a first connecting portion. The second connecting portion is provided with a positioning block, and the first connecting portion is provided with a positioning groove adapted to the positioning block. The positioning groove includes a first positioning groove, a second positioning groove, and a third positioning groove. The first positioning groove, the second positioning groove, and the third positioning groove are respectively located at different positions of the first connecting portion and close to the operating component. The end of the operating component away from the second connecting portion has a channel through which the elastic blocking member passes. The second connecting portion has a third guide cavity through which the suture member passes. The width of the elastic blocking member in its extended state is greater than the diameter of the channel, and the channel and the third guide cavity are opposite to each other. The maximum width of the elastic blocking member in its compressed state is less than the diameter of the second guide cavity and the diameter of the third guide cavity. When the positioning block is engaged with the second positioning groove, the central axis of the channel, the central axis of the second guide cavity, and the central axis of the third guide cavity coincide.

2. The suturing device according to claim 1, characterized in that, It also includes a connector, which includes a first connector and a second connector that are adapted to each other. The first connecting part and the second connecting part are rotatably connected by the first connector and the second connector being adapted to each other.

3. The suturing device according to claim 2, characterized in that, The first connecting part is a U-shaped structure, the first connecting member is a snap-fit ​​groove, the first connecting part is provided with at least one of the snap-fit ​​grooves, the second connecting member is a snap-fit ​​block, and the second connecting part is provided with at least one of the snap-fit ​​blocks.

4. The suturing device according to claim 1, characterized in that, The operating component includes a first operating part and a second operating part. The first operating part and the second operating part are connected at an angle of 70° to 120°. The second operating part is inclinedly connected to the second connecting part.

5. The suturing device according to claim 1, characterized in that, The operating component is a one-piece molded structure.

6. The suturing device according to claim 1, characterized in that, The actuating element further includes a tip, which is disposed at the end of the actuating element away from the guide.

7. The suturing device according to claim 1, characterized in that, It also includes a gripping part, which is disposed outside the guide member.

8. The suturing device according to claim 7, characterized in that, The guide, the operating element, and the guide portion are made of stainless steel, the grip portion is made of elastic material, and the suture material is either a non-absorbable material or an absorbable material.

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