Blood vessel suturing device

Abstract

The utility model discloses a blood vessel suturing device which comprises a shell, a needle handle assembly and a sheath tube assembly are arranged at the two ends of the shell respectively, the needle handle assembly comprises a needle handle connecting piece, the needle handle connecting piece is movably connected with the shell, and a safety device is arranged between the needle handle connecting piece and the shell. The safety device comprises a sliding block and a positioning block, and the sliding block is connected with the needle handle connecting piece; the safety device is arranged at the joint between the needle handle assembly and the shell, the safety device limits the connection between the needle handle assembly and the shell by arranging the sliding block, when the sliding block does not slide towards one side of the shell, the sliding block limits the needle handle assembly and the shell, and when the shell moves towards one side of the shell by a certain distance, the sliding block can slide towards the other side of the shell. Namely, after the needle head is connected with the needle sleeve, the safety device relieves limiting between the needle handle assembly and the shell, the needle handle assembly can be pulled out of the shell, and the situation that the interior of the stitching instrument is damaged due to misoperation of an operator is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a vascular suture device. Background Technology

[0002] Interventional surgery has become the preferred treatment option for cardiovascular diseases such as aneurysms, vascular stenosis, and acute myocardial infarction in recent years. With its advantages of minimal invasiveness, high efficiency, precise treatment, and safety, interventional surgery has become the third most common clinical treatment after surgery and internal medicine. Interventional surgery relies heavily on vascular puncture, with femoral artery puncture being not only a classic route for coronary intervention but also accounting for 90% of puncture routes in peripheral interventional procedures. However, hemostasis after femoral artery puncture has always been a challenge for clinicians. Traditional hemostasis methods involve manual pressure, requiring up to 25 minutes of pressure on the puncture site, and the patient must remain in bed for an extended period afterward. This is not only time-consuming and labor-intensive for medical staff but also inconvenient for patients who cannot lie flat for extended periods. Therefore, there is an urgent need for a hemostatic device that offers significant hemostasis, a safe and reliable vascular closure method, a large puncture site range, and postoperative remedial capability.

[0003] Existing vascular suturing devices lack safety mechanisms. Users often make mistakes during operation, pulling the needle handle assembly directly out of the vascular suturing device without connecting the needle sheath, rendering the entire device unusable and causing trauma to the vascular suture site. Utility Model Content

[0004] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a vascular suturing device.

[0005] The technical solution adopted by this utility model is as follows: It includes a shell, with a needle handle assembly and a sheath assembly respectively provided at both ends of the shell. The needle handle assembly includes a needle handle connector, which is movably connected to the shell. A safety device is provided between the needle handle connector and the shell. The safety device includes a sliding block and a positioning block. The sliding block is connected to the needle handle connector and slidably connected to the positioning block. A suture assembly is provided on the sheath assembly. The suture assembly includes a thread lead, which is connected to the needle handle assembly via a thread lead pull wire. A bridging wire is connected to the thread lead.

[0006] As a preferred embodiment of the present invention, the needle handle assembly further includes a needle handle and a needle handle fixing member. The needle handle is installed and connected to the needle handle connecting member, and the needle handle fixing member is fixedly connected to the needle handle connecting member. A fixing plate is fixedly provided on the needle handle connecting member, and a fixing shaft is provided on the fixing plate. The fixing shaft is fixedly connected to the fixing plate.

[0007] As a preferred embodiment of this utility model, a positioning groove is formed on the sliding block, the positioning groove is adapted to the fixed shaft, the positioning block is fixedly connected to the outer shell, a sliding groove is formed on the positioning block, the sliding groove is inclined along the length direction of the outer shell, a positioning shaft is fixedly provided on the sliding block, and the positioning shaft slides in cooperation with the sliding groove.

[0008] As a preferred embodiment of this utility model, the outer casing is provided with a wrench, which is rotatably connected to the outer casing. The lead is rotatably connected to the sheath assembly. The lead is provided with a lead pull wire, one end of which is fixedly connected to the lead and the other end is fixedly connected to the wrench. The two ends of the lead are respectively provided with mounting grooves, which penetrate the lead, and the cross-sectional dimension of one end of the mounting groove is larger than the cross-sectional dimension of the other end.

[0009] As a preferred embodiment of this utility model, the sheath assembly has a hanging hole located on one side of the lead wire. A needle sleeve is installed in the mounting groove and is engaged with the mounting groove. Two needle sleeves are connected by a bridging wire and pass through the hanging hole.

[0010] As a preferred embodiment of this utility model, a solid needle and a hollow needle tube are fixedly provided on the needle handle fixing member. The solid needle and the hollow needle tube pass through the thread foot and are respectively located on one side of the mounting groove. A needle tip is connected to one end of the solid needle and the hollow needle tube. A suture thread is connected to the needle tip. A fisherman's knot is formed on the suture thread. The fisherman's knot is located inside the thread foot. A pusher needle is provided inside the hollow needle tube. One end of the pusher needle is fixedly connected to the needle handle connecting member, and the other end abuts against the needle tip.

[0011] As a preferred embodiment of this invention, a through hole is formed inside the needle sleeve, a pressure plate is provided on the needle sleeve, and the needle tip is installed and connected to the needle sleeve through the through hole.

[0012] As a preferred embodiment of the present invention, a marking cavity is formed on the outer shell, and the marking cavity is connected to the sheath assembly.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention relates to a vascular suturing device. A safety device is installed at the connection between the needle handle assembly and the outer shell. This safety device uses a sliding block to limit the connection between the needle handle assembly and the outer shell. When the sliding block is not sliding towards the outer shell, it limits the connection between the needle handle assembly and the outer shell. When the outer shell moves a certain distance towards the outer shell, i.e., after the needle tip is connected to the needle sheath, the safety device releases the limitation between the needle handle assembly and the outer shell, allowing the needle handle assembly to be pulled out of the outer shell. This prevents operator error from damaging the internal components of the suture device and protects the vascular suturing site from injury. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a partial cross-sectional structural schematic diagram of the present invention;

[0018] Figure 3 This is a partial frontal sectional view of the present invention.

[0019] Figure 4 This is a utility model Figure 3 A magnified structural diagram at point A;

[0020] Figure 5 This is a schematic diagram of the structure of the sliding block of this utility model;

[0021] Figure 6 This is a cross-sectional structural schematic diagram of the stitching assembly of this utility model;

[0022] Figure 7 This is a cross-sectional view of the connection between the needle tip and the hollow needle tube of this utility model.

[0023] Figure 8 This is a schematic diagram of the structure of the needle sleeve of this utility model;

[0024] Figure 9 This is a schematic diagram of the needle handle assembly of this utility model.

[0025] In the diagram: 1. Needle handle assembly; 2. Outer shell; 3. Sheath assembly; 4. Sewing assembly; 5. Wrench; 6. Marking cavity; 11. Needle handle; 12. Needle handle connector; 13. Needle handle fixing component; 21. Safety device; 210. Sliding block; 211. Positioning block; 212. Positioning shaft; 213. Slide groove; 214. Positioning groove; 215. Fixing shaft; 216. Fixing plate; 111. Push needle; 131. Solid needle; 132. Hollow needle tube; 41. Needle tip; 42. Suture thread; 43. Thread foot; 44. Thread foot pull thread; 45. Needle sheath; 46. Bridging thread; 422. Hanging hole; 430. Mounting groove; 453. Pressure plate; 454. Through hole; 481. Fisherman's knot. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] The following is combined Figure 1-3This invention describes a vascular suture device comprising a housing 2, with a needle handle assembly 1 and a sheath assembly 3 at each end. The needle handle assembly 1 includes a handheld part for interventional surgery and a control part for the suture assembly 4. The needle handle assembly 1 includes a needle handle connector 12, which is movably connected to the housing 2. Different surgical needles and sutures 42 in the suture assembly 4 are inserted into the blood vessel through the needle handle assembly 1. A safety device 21 is provided between the needle handle connector 12 and the housing 2. The safety device 21 controls the mutual movement between the needle handle assembly 1 and the housing 2. During surgery, when the needle tip 41 is not connected to the needle sheath 45, the needle handle connector 12 cannot be pulled out. The safety device 21 must first push the needle handle connector 12 a certain distance to one side of the housing 2 to achieve connection between the needle tip 41 and the sheath before releasing the restriction between the needle handle connector 12 and the housing 2. The safety device 21 effectively prevents misuse of the suture device and damage to the sutured wound. The safety device 21 includes a sliding block 210 and a positioning block 211. The sliding block 210 is connected to the needle handle connector 12 and slidably connected to the positioning block 211. The top of the sliding block 210 is used to restrict the pull-out of the needle handle connector 12. When the needle handle 11 pushes the sliding block 210 towards the outer shell 2, the sliding block 210 slides synchronously towards the outer shell 2. Since the positioning block 211 provides a downward sliding path for the sliding block 210, after the sliding block 210 completes its sliding, the top releases the needle. The needle handle assembly 1 can be pulled outward by limiting the handle connector 12, thereby limiting or releasing the needle handle assembly 1; the sheath assembly 3 is provided with a suture assembly 4, which includes a suture 43. The suture 43 is connected to the needle handle assembly 1 through a suture pull line 44. A bridging line 46 is connected to the suture 43. The suture 43 is used to spread on the blood vessel wall during interventional surgery, providing support for blood vessel puncture, achieving accurate perforation of the blood vessel wall, and passing through the suture 42 to suture the blood vessel.

[0029] Please refer to Figure 2 , 3As shown in Figures 4, 5, and 9, the needle handle assembly 1 further includes a needle handle 11 and a needle handle fixing member 13. The needle handle 11 is installed and connected to the needle handle connecting member 12, and the needle handle fixing member 13 is fixedly connected to the needle handle connecting member 12. A fixing plate 216 is fixedly provided on the needle handle connecting member 12, and a fixing shaft 215 is provided on the fixing plate 216. The fixing shaft 215 is fixedly connected to the fixing plate 216. The needle handle 11 and the needle handle connecting member 12 are connected by a plug-in connection, and the needle handle connecting member 12 and the needle handle fixing member... 13. The needle handle 11, the needle handle connector 12 and the needle handle fixing member 13 form an integrated structure. During surgery, the end of the needle handle fixing member 13 away from the needle handle 11 is connected to different surgical needles and threads, and they pass through the outer shell 2. The needle handle connector 12 is adapted to the outer shell 2 to realize the installation and cooperation between the needle handle assembly 1 and the outer shell 2. A fixing plate 216 is fixedly provided on the needle handle connector 12, and a fixing shaft 215 is fixedly connected on the fixing plate 216. The fixing shaft 215 is in contact with the top of the sliding block 210.

[0030] Please refer to Figure 4-6 As shown, a positioning groove 214 is formed on the sliding block 210, which is adapted to the fixed shaft 215. The positioning block 211 is fixedly connected to the outer shell 2, and a sliding groove 213 is formed on the positioning block 211. The sliding groove 213 is inclined along the length direction of the outer shell 2. A positioning shaft 212 is fixedly provided on the sliding block 210, and the positioning shaft 212 slides in cooperation with the sliding groove 213. When the safety device 21 limits the needle handle assembly 1, the fixed shaft 215 fixed on the fixed plate 216 is located in the positioning groove 214 at the top of the sliding block 210, while the positioning shaft 212 on the sliding block 210 is located in the sliding groove 213. Since the sliding groove 213 is inclined, when the positioning shaft 212 is located at the left end of the sliding groove 213, the sliding block 210... The fixed shaft 215 is limited and cannot disengage from the positioning groove 214. When the needle handle assembly 1 moves towards the outer shell 2, the fixed shaft 215 and the needle handle assembly 1 move towards the outer shell 2 simultaneously. At the same time, the fixed shaft 215 drives the sliding block 210 to slide obliquely downward along the slide groove 213. The positioning groove 214 and the fixed shaft 215 gradually separate. When the sliding block 210 slides to a certain distance, the fixed shaft 215 and the positioning groove 214 are completely separated. Finally, the safety device 21 releases the limitation on the needle handle assembly 1, allowing the needle handle assembly 1 to be pulled out of the outer shell 2, effectively avoiding damage to the inside of the suture device. During the process of the safety device 21 releasing the limitation, the needle 41 and the needle sheath 45 are connected simultaneously to puncture the blood vessel wall, allowing the suture 42 to pass through the blood vessel wall.

[0031] Please refer to Figure 1-6As shown, the outer casing 2 is equipped with a wrench 5, which is rotatably connected to the outer casing 2. The wrench 5 is rotatably connected to the outer casing 2 and can be flipped to unfold or retract the suture 43. The suture 43 is rotatably connected to the sheath assembly 3. The suture 43 can be unfolded or retracted on the blood vessel wall by the operator. In the retracted state, it matches the diameter of the sheath assembly 3 and can pass through the blood vessel wall to different surgical sites. In the unfolded state, the two ends of the suture 43 abut against the blood vessel wall at both ends of the puncture point, facilitating the passage of the surgical needle and suture 42 through the blood vessel wall. The suture 43 is equipped with a suture pull line 44. One end of the suture pull line 44 is fixedly connected to the suture 43, and the other end is fixedly connected to the wrench 5. After the sheath assembly 3 is inserted into the blood vessel to the required position, the wrench 5 can be flipped to unfold or retract the suture 43. The wrench 5 is moved so that the thread 44 connected to the wrench 5 can pull the thread 43 to unfold and press against the blood vessel walls on both sides of the puncture point. After puncture, when it is necessary to pull out the puncture needle and the suture 42 that has passed through the blood vessel wall, the wrench 5 is rotated to reset, so that the thread 43 is retracted, thus suturing the blood vessel wall. The two ends of the thread 43 are respectively provided with mounting grooves 430, which pass through the thread 43. The cross-sectional dimension of one end of the mounting groove 430 is larger than that of the other end. In some embodiments, the shape of the mounting groove 430 can be a frustum or a cone. In this example, the mounting groove 430 is a frustum. By designing the bottom cross-section to be larger than the top cross-section, it is easy to accurately align and connect the surgical needle with the internal components of the mounting groove 430.

[0032] Please refer to Figure 6 As shown, the sheath assembly 3 has a hanging hole 422 located on one side of the suture 43. A needle sleeve 45 is installed in the mounting groove 430 and is engaged with the mounting groove 430. Two needle sleeves 45 are connected by a bridging wire 46, which passes through the hanging hole 422. The needle sleeve 45 is embedded in one side of the mounting groove 430. A through groove (not shown) is provided between the needle sleeve 45 and the mounting groove 430 for removing the needle sleeve 45 embedded in the mounting groove 430. A needle sleeve 45 is provided at each end of the suture 43, and the two needle sleeves 45 are connected by a bridging wire 46. The bridging wire 46 passes through the hanging hole 422 and is pushed synchronously with the sheath assembly 3 to the required position in the blood vessel, so as to achieve the requirement for the suture 42 to pass through the blood vessel wall and facilitate the suturing of the blood vessel wall.

[0033] Please refer to Figure 9. A solid needle 131 and a hollow needle tube 132 are fixedly mounted on the needle handle fixing member 13. The solid needle 131 and the hollow needle tube 132 pass through the thread foot 43 and are positioned on one side of the mounting groove 430. A needle tip 41 is connected to one end of the solid needle 131 and the hollow needle tube 132. A suture 42 is connected to the needle tip 41, and a fisherman's knot 481 is formed on the suture 42. A pusher needle 111 is provided inside the hollow needle tube 132. One end of the pusher needle 111 is fixedly connected to the needle handle connecting member 12, and the other end abuts against the needle tip 41. During the process of releasing the limiting position of the needle handle connecting member 12, the needle handle connecting member 12 simultaneously drives the pusher needle 111 to push. The needle 41 moves towards the needle sheath 45 to connect the needle 41 and the needle sheath 45. During the movement of the needle 41, it passes through the blood vessel wall, allowing the suture 42 to pass through the blood vessel wall. The fisherman's knot 481 is located inside the suture leg 43. The needle 41 and the needle sheath 45 are connected and cooperated. By connecting the needle 41 and the needle sheath 45, the suture 42 on the needle 41 is connected to the bridging thread 46. By pulling one end of the bridging thread 46, that is, pulling the solid needle 131, the suture 42 can pass through the blood vessel wall. Since the fisherman's knot 481 is pre-formed on the suture 42, the fisherman's knot 481 can avoid knotting during blood vessel suturing. Only one end of the suture 42 needs to be pulled to suturing and knotting the blood vessel wall.

[0034] Please refer to Figure 8 As shown, a through hole 454 is formed inside the needle sleeve 45, and a pressure plate 453 is provided on the needle sleeve 45. The needle 41 is installed and connected to the needle sleeve 45 through the through hole 454. The pressure plate 453 realizes the connection between the needle 41 and the needle sleeve 45 and the mutual snap-fit ​​after connection, thereby improving the stability of the connection between the needle 41 and the needle sleeve 45.

[0035] Please refer to the figure. A marking cavity 6 is formed on the outer shell 2. The marking cavity 6 is connected to the sheath assembly 3. The marking cavity 6 is connected to the sheath assembly 3. When the sheath assembly 3 is pushed in the blood vessel, it is pushed to the required position. The blood in the blood vessel flows out through the marking cavity 6. The amount of blood flowing out can be used to determine whether the sheath assembly 3 has been pushed to the required position.

[0036] The working principle of this utility model:

[0037] The sheath assembly 3 of the vascular suture device is pushed into the vascular lumen. The position is determined by the marking cavity 6. After being pushed into the vascular lumen, the blood within the lumen will flow out through the marking cavity 6. Once pushed to the appropriate position, the wrench 5 is rotated. The suture pull 44 connected to the wrench 5 causes the suture 43 to unfold, so that both ends of the suture 43 abut against the vascular walls on both sides of the puncture point. The two ends of the suture 43 have two needle sleeves 45 connected by a bridging suture 46. The bridging suture 46 follows the suture 43. The needle is simultaneously pushed into the blood vessel lumen. During suturing, the needle handle connector 12 is pushed, causing the needle pusher 111 to move. The needle pusher 111 moves the needle tip 41 into the needle sheath 45, ultimately allowing the needle tip 41 to penetrate the blood vessel wall and engage with the needle sheath 45. At the same time, the movement of the needle handle connector 12 causes the fixing plate 216 and the fixing shaft 215 on the fixing plate 216 to move towards the outer shell 2. The fixing shaft 215 drives the sliding block 210 outward through the positioning groove 214. As the shell 2 moves to one side, the movement of the sliding block 210 is restricted by the slide groove 213. Since the slide groove 213 is inclined downwards towards the shell 2, as the sliding block 210 gradually moves towards the shell 2, the fixed shaft 215 gradually separates from the sliding block 210, thereby releasing the limit on the needle handle connector 12. This prevents damage to the suture device from pulling out the needle handle connector 12 when the needle tip 41 and needle sleeve 45 are not connected. The needle handle connector 12 can then be pulled out towards the shell 2, simultaneously pulling out the solid needle 13. 1. The hollow needle tube 132 is pulled out inside the blood vessel. Since there is a bridging line 46 between the two needle sheaths 45, and the other end of the needle sheath 45 is connected to the suture 42, by pulling out the solid needle 131 and controlling the distance of the hollow needle tube 132, the suture 42 is finally able to pass through the blood vessel wall. Since the fisherman's knot 481 is reserved on the suture 42, the fisherman is not required to tie the suture 42. By cutting off the excess suture 42 outside the fisherman's knot 481, the blood vessel wall is finally sutured.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this application, they should all fall within the protection scope of this utility model.

Claims

1. A vascular suture device, characterized in that: The device includes an outer casing, with a needle handle assembly and a sheath assembly at each end. The needle handle assembly includes a needle handle connector, which is movably connected to the outer casing. A safety device is provided between the needle handle connector and the outer casing. The safety device includes a sliding block and a positioning block. The sliding block is connected to the needle handle connector and slidably connected to the positioning block. The sheath assembly is provided with a suture assembly, which includes a thread lead. The thread lead is connected to the needle handle assembly via a thread lead pull line, and a bridging thread is connected to the thread lead.

2. The vascular suture device according to claim 1, characterized in that: The needle handle assembly further includes a needle handle and a needle handle fixing member. The needle handle is installed and connected to the needle handle connecting member. The needle handle fixing member is fixedly connected to the needle handle connecting member. A fixing plate is fixedly provided on the needle handle connecting member. A fixing shaft is provided on the fixing plate. The fixing shaft is fixedly connected to the fixing plate.

3. The vascular suture device according to claim 2, characterized in that: A positioning groove is formed on the sliding block, the positioning groove is adapted to the fixed shaft, the positioning block is fixedly connected to the outer shell, a sliding groove is formed on the positioning block, the sliding groove is inclined along the length direction of the outer shell, a positioning shaft is fixedly provided on the sliding block, and the positioning shaft slides in cooperation with the sliding groove.

4. The vascular suture device according to claim 1, characterized in that: The outer casing is provided with a wrench, which is rotatably connected to the outer casing. The lead is rotatably connected to the sheath assembly. The lead is provided with a lead pull wire, one end of which is fixedly connected to the lead and the other end is fixedly connected to the wrench. The two ends of the lead are respectively provided with mounting grooves, which pass through the lead, and the cross-sectional dimension of one end of the mounting groove is larger than the cross-sectional dimension of the other end.

5. A vascular suture device according to claim 4, characterized in that: The sheath assembly has a hanging hole located on one side of the lead. A needle sleeve is installed in the mounting groove and engages with the mounting groove. Two needle sleeves are connected by a bridging wire and pass through the hanging hole.

6. A vascular suture device according to claim 5, characterized in that: A solid needle and a hollow needle tube are fixedly provided on the needle handle fixing member. The solid needle and the hollow needle tube pass through the thread foot respectively and are located on one side of the mounting groove. A needle tip is connected to one end of the solid needle and the hollow needle tube. A suture thread is connected to the needle tip. A fisherman's knot is formed on the suture thread. The fisherman's knot is located inside the thread foot. A pusher needle is provided inside the hollow needle tube. One end of the pusher needle is fixedly connected to the needle handle connecting member, and the other end abuts against the needle tip.

7. A vascular suture device according to claim 6, characterized in that: A through hole is formed inside the needle sleeve, and a pressure plate is provided on the needle sleeve. The needle tip is installed and connected to the needle sleeve through the through hole.

8. A vascular suture device according to claim 1, characterized in that: A marking cavity is formed on the outer shell, and the marking cavity is connected to the sheath assembly.

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