Blood vessel suturing device

Abstract

The invention discloses a blood vessel suturing device which comprises a handle, a sheathing canal and a piston connected with the handle in a sliding mode, a hard needle is arranged on the piston, at least part of the hard needle is arranged in the sheathing canal in a sliding mode, and the hard needle is further connected with a suture and is driven to advance or be pulled out towards a host so as to complete blood vessel suturing work. The syringe is characterized in that the handle is detachably connected with the sheath tube, and the piston is detachably connected with the hard needle. The sheath tube and the handle are arranged to be detachable, so that the handle part can be repeatedly used, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a blood vessel suturing device. Background Art

[0002] In recent years, with the continuous improvement of living standards, the incidence of arteriosclerosis has tended to increase gradually. Arteriosclerosis is a non-inflammatory lesion of the arteries. It is usually a disease in which lipid substances such as cholesterol are deposited on the inner wall of human blood vessels, causing local necrosis of the blood vessel wall, accompanied by fibrous tissue hyperplasia, resulting in thickening and hardening of the arterial blood vessel wall. The surgical treatment of atherosclerosis includes surgical operations such as recanalization, reconstruction or bypass transplantation of narrowed or occluded blood vessels. In related technologies, interventional vascular suture devices are usually used to perform surgery on cases of atherosclerosis.

[0003] However, existing vascular suturing devices are usually disposable as medical devices. However, only the front sheath part actually comes into contact with the patient. Since the front sheath and the handle part are non-detachable, they need to be discarded completely, and the cost of use is very high. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a blood vessel suturing device, wherein the sheath and the handle are detachable, so that the handle portion can be reused, thereby reducing the use cost.

[0005] The present invention is achieved through the following technical solutions:

[0006] A vascular suturing device comprises a handle, a sheath and a piston slidably connected to the handle, wherein the piston is provided with a hard needle, and the hard needle is at least partially slidably arranged in the sheath, the hard needle is also connected to a suture and is driven to advance toward or be withdrawn from a host to complete the vascular suturing work, the handle is detachably connected to the sheath, and the piston is detachably connected to the hard needle.

[0007] Furthermore, the blood vessel suturing device also includes a quick-release assembly, and the handle and the sheath are detachably connected via the quick-release assembly.

[0008] Furthermore, the quick release assembly is provided with a first slot, the sheath is provided with a first limit block, the sheath is at least partially accommodated in the quick release assembly and the first limit block is clamped in the first slot.

[0009] Furthermore, the quick-release assembly includes a first component and a second component matched with each other, the first component is provided with a first limiting groove, the second component is provided with a second limiting groove, and the first limiting groove and the second limiting groove constitute the first clamping groove.

[0010] Furthermore, a first positioning pin and a second positioning pin are formed on the first component, and a first positioning groove and a second positioning groove cooperating with the first positioning pin and the second positioning pin are formed on the second component.

[0011] Furthermore, the inner peripheral wall of the handle is gap-matched with the outer peripheral surface of the quick-release assembly.

[0012] Furthermore, the quick release assembly is elastic and has at least two cantilevers formed on its outer circumferential surface, each of the cantilevers is formed with a second limit block, the quick release assembly can be inserted into the handle, and the handle is formed with a second slot that is engaged with the second limit block.

[0013] Furthermore, the trigger drives the sheath tube through the linkage assembly, a connecting piece is provided in the linkage assembly, and the sheath tube is detachably connected to the connecting piece.

[0014] Furthermore, a transmission needle is arranged in the sheath tube, an open groove is formed on the connecting piece, a slide groove is formed on the inner wall of the open groove, and the transmission needle slides along the direction of the slide groove and is matched with the slide groove.

[0015] Furthermore, a ball head is formed at the end of the transmission needle, a ball groove connected to the sliding groove is provided in the connecting piece, and the ball head can be received in the opening groove.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1. By providing a quick-release assembly, and the handle and the sheath are detachably connected through the quick-release assembly, the sheath can be simply removed and discarded after use of the device, and the handle part can be reused, thereby reducing the use cost.

[0018] 2. By providing a ball head groove in the connector and providing a corresponding ball head on the transmission needle in the sheath, the sheath and the connecting device can be simply connected, which is convenient for installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a blood vessel suturing device according to an embodiment of the present invention;

[0020] Figure 2 An exploded view of a vascular suturing device according to an embodiment of the present invention;

[0021] Figure 3 A cross-sectional view of a vascular suturing device according to an embodiment of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a quick-release assembly according to an embodiment of the present invention;

[0023] Figure 5 An exploded view of a quick-release assembly according to an embodiment of the present invention;

[0024] Figure 6 It is a structural schematic diagram of a connecting piece according to an embodiment of the present invention;

[0025] Figure 7 4 is a cross-sectional view of a connecting member according to an embodiment of the present invention.

[0026] Description of the drawings: 1. handle; 2. sheath; 3. piston; 4. quick release assembly; 10. hard needle; 12. suture; 20. first limit block; 40. first slot; 45. round hole; 43. first component; 44. second component; 430. first positioning pin; 431. second positioning pin; 440. first positioning slot; 441. second positioning slot; 401. first limit slot; 402. second limit slot; 41. cantilever; 410. second limit block; 42. second slot; 15. docking part; 14. linkage assembly; 11. trigger; 140. connector; 21. transmission needle; 22. expansion part; 210. ball head; 141. ball slot; 142. opening slot; 144. chamfer; 143. slide slot; 18. elastic element; 17. outer peripheral surface; 16. inner peripheral wall. DETAILED DESCRIPTION

[0027] The following is a further non-restrictive detailed description of the technical solution of the invention in conjunction with the preferred embodiments and the accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limitations on the present invention.

[0028] like Figure 1 and Figure 2As shown, a vascular suturing device according to an embodiment of the present invention comprises a handle 1, a sheath tube 2, a quick-release assembly 4, and a piston 3 slidably connected to the handle 1. A hard needle 10 is arranged on the piston 3, and the hard needle 10 is at least partially slidably arranged in the sheath tube 2. The hard needle 10 is also connected to a suture 12 and is driven to move forward or withdraw toward the host to complete the vascular suturing work. The handle 1 and the sheath tube 2 are detachably connected by the quick-release assembly 4, and the piston 3 is detachably connected to the hard needle 10.

[0029] The sheath tube 2 is at least partially contained in the quick release assembly 4. Figure 3 and Figure 4 A first limit block 20 is provided on the sheath 2, and the quick release assembly 4 is provided with a first slot 40 and a circular hole 45. The sheath 2 can be at least partially placed in the circular hole 45, and the first limit block 20 is clamped in the first slot 40 to limit the displacement of the sheath 2.

[0030] Reference Figure 5 The quick release assembly 4 includes a first component 43 and a second component 44 that are matched with each other. The first component 43 is formed with a first positioning pin 430 and a second positioning pin 431, and the second component 44 is formed with a first positioning groove 440 and a second positioning groove 441 that respectively match the first positioning pin 430 and the second positioning pin 431. The first component 43 and the second component 44 are positioned and closed by the first positioning pin 430 and the second positioning pin 431 and the first positioning groove 440 and the second positioning groove 441 to form a nearly cylindrical quick release assembly 4.

[0031] A first limiting groove 401 is formed on the first component 43, and a second limiting groove 402 is formed on the second component 44. When the first component 43 and the second component 44 are closed, the first limiting groove 401 and the second limiting groove 402 constitute the above-mentioned first clamping groove 40. During installation, the first component 43 and the second component 44 are separated first, and then the sheath 2 is placed in the circular hole 45 and it is ensured that one side of the first limiting block 20 is located in the first limiting groove 401 and the other side is located in the second limiting groove 402. Then, the first positioning pin 430 and the second positioning pin 431 are positioned and closed to ensure that the first limiting block 20 is located in the first clamping groove 40, so as to achieve the function of limiting the sheath 2.

[0032] In addition, the quick release assembly 4 can be inserted into the handle 1 , and the inner circumferential wall 16 of the handle 1 and the outer circumferential surface 17 of the quick release assembly 4 are gap-matched, so that the sheath 2 together with the quick release assembly 4 and the handle 1 are fixed.

[0033] Specifically, the quick release assembly 4 is elastic and has at least two cantilevers 41 formed on the outer peripheral surface 17 of the quick release assembly 4 . The cantilevers 41 are each formed with a second limit block 410 . The handle 1 is formed with a second slot 42 that is engaged with the second limit block 410 .

[0034] Further, the handle 1 includes a docking portion 15, on which a second slot 42 is formed to be engaged with the second limit block 410, and the quick release assembly 4 can be inserted into the docking portion 15. During the insertion of the quick release assembly 4 into the docking portion 15, the second limit block 410 is squeezed by the inner peripheral wall 16 of the handle 1, so that the cantilever 41 is deformed inwardly. When the second limit block 410 moves to the second slot 42, the cantilever 41 is reset under its own elastic action, and the second limit block 410 is engaged in the corresponding second slot 42 to achieve the fixation of the quick release assembly 4 and the handle 1. In this embodiment, a cantilever 41 is formed on each of the first component 43 and the second component 44, and they are symmetrically arranged, so that the quick release assembly 4 is subjected to uniform force, the fixation is more stable, and it is convenient to disassemble.

[0035] Reference Figure 2 The handle 1 further includes a trigger 11 and a linkage assembly 14. The trigger 11 drives the sheath 2 through the linkage assembly 14. A connector 140 is provided in the linkage assembly 14. The sheath 2 is detachably connected to the connector 140. Further, the sheath 2 includes a transmission needle 21 and an expansion part 22. The transmission needle 21 is connected to the expansion part 22. Pulling the transmission needle 21 can expand the expansion part 22. The transmission needle 21 is detachably connected to the connector 140.

[0036] Specifically, the connecting member 140 is formed with an opening groove 142, and the end of the transmission needle 21 can be inserted into the opening groove 142 and thus inserted into the connecting member 140. A sliding groove 143 is formed on the inner wall of the opening groove 142, and the transmission needle 21 can slide along the direction of the sliding groove 143 and match with the sliding groove 143.

[0037] In addition, a ball head 210 is formed at the end of the transmission needle 21 , and a ball groove 141 connected to the slide groove 143 is provided in the connecting member 140 . The ball head 210 can be received in the ball groove 141 to achieve the effect of limiting the displacement of the transmission needle 21 .

[0038] Finally, a chamfer 144 is formed at the end of the opening slot 142 to facilitate the insertion of the ball head 210 .

[0039] An elastic element 18 is also provided in the linkage assembly 14 , one end of the elastic element 18 abuts against the inner wall of the linkage assembly 14 , and the other end abuts against the connecting member 140 , for playing a buffering role in the process of the trigger 11 pulling the linkage assembly 14 and thereby pulling the transmission needle 21 .

[0040] In this embodiment, a fixing hole for inserting the hard needle 10 is provided in the piston 3, and the hard needle 10 is detachably fixed in the fixing hole.

[0041] After the user has finished using the vascular suturing device, the user needs to press the second limit block 410 to disengage the second limit block 410 from the second slot 42. At this time, the sheath 2 and the quick-release assembly 4 are taken out from the handle 1 together, and the sheath 2 and the quick-release assembly 4 can be disassembled by disassembling the quick-release assembly 4, and the hard needle 10 can be pulled out of the piston 3 and discarded.

[0042] When the user needs to use it again, after disinfecting the handle 1 and the piston 3, take out the new sheath 2 and the hard needle 10, first insert the hard needle 10 into the fixing hole, and ensure the exposed length of the hard needle 10 by the limiting tooling, then close the first component 43 and the second component 44 and fix the new sheath 2, and then insert the quick-release assembly 4 into the docking part 15, and make the second limit block 410 engage with the second slot 42, and at the same time, align the ball head 210 with the open slot 142 on the connecting piece 140, when the second limit block 410 is engaged with the second slot 42, the ball head 210 is simultaneously engaged with the ball slot 141, and finally, insert the piston 3 together with the hard needle 10 into the handle 1.

[0043] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A vascular suturing device, comprising a handle (1), a sheath (2) and a piston (3) slidably connected to the handle (1), wherein a hard needle (10) is arranged on the piston (3), and the hard needle (10) is at least partially slidably arranged in the sheath (2), and the hard needle (10) is also connected to a suture (12) and the hard needle (10) is driven to move forward or withdraw toward a host to complete the vascular suturing work, characterized in that: The handle (1) is detachably connected to the sheath tube (2), and the piston (3) is detachably connected to the hard needle (10).

2. The vascular suturing device according to claim 1, characterized in that: The blood vessel suturing device further comprises a quick-release assembly (4), and the handle (1) and the sheath tube (2) are detachably connected via the quick-release assembly (4).

3. The vascular suturing device according to claim 2, characterized in that: The quick-release assembly (4) is provided with a first card slot (40), the sheath tube (2) is provided with a first limit block (20), the sheath tube (2) is at least partially accommodated in the quick-release assembly (4), and the first limit block (20) is clamped in the first card slot (40).

4. The vascular suturing device according to claim 3, characterized in that: The quick-release assembly (4) comprises a first component (43) and a second component (44) which are matched with each other, the first component (43) is provided with a first limiting groove (401), the second component (44) is provided with a second limiting groove (402), and the first limiting groove (401) and the second limiting groove (402) constitute the first clamping slot (40).

5. The vascular suturing device according to claim 4, characterized in that: The first component (43) is formed with a first positioning pin (430) and a second positioning pin (431), and the second component (44) is formed with a first positioning groove (440) and a second positioning groove (441) that cooperate with the first positioning pin (430) and the second positioning pin (431).

6. The vascular suturing device according to claim 4, characterized in that: The inner peripheral wall (16) of the handle (1) is gap-matched with the outer peripheral surface (17) of the quick-release assembly (4).

7. The vascular suturing device according to claim 3, characterized in that: The quick-release assembly (4) is elastic and at least two cantilevers (41) are formed on the outer peripheral surface (17) of the quick-release assembly (4), each of the cantilevers (41) being formed with a second limit block (410). The quick-release assembly (4) can be inserted into the handle (1), and the handle (1) is formed with a second slot (42) for engaging with the second limit block (410).

8. The vascular suturing device according to claim 1, wherein the handle (1) comprises a trigger (11) and a linkage assembly (14), wherein the trigger (11) drives the sheath (2) via the linkage assembly (14), wherein a connecting piece (140) is provided in the linkage assembly (14), and the sheath (2) is detachably connected to the connecting piece (140).

9. The blood vessel suturing device according to claim 8, characterized in that: A transmission needle (21) is arranged in the sheath tube (2), an opening groove (142) is formed on the connecting piece (140), a sliding groove (143) is formed on the inner wall of the opening groove (142), and the transmission needle (21) slides along the direction of the sliding groove (143) and is matched with the sliding groove (143).

10. The blood vessel suturing device according to claim 9, characterized in that: A ball head (210) is formed at the end of the transmission needle (21), a ball groove (141) connected to the slide groove (143) is provided in the connecting member (140), and the ball head (210) can be received in the opening groove (142).

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