Outline needle assembly

Abstract

The present invention provides a thread-hooking needle assembly. The thread-hooking needle assembly includes a thread-hooking needle housing and two thread-hooking needles located in the thread-hooking needle housing. The thread-hooking needle includes a needle tip located at the distal end of the thread-hooking needle. The needle tip can extend outward from the distal end of the thread-hooking needle housing, and there is an included angle between the extending directions of the needle tips of the two thread-hooking needles. By adopting the present invention, after the linear stapler closes the tissue, the thread-hooking needle can be used to tuck the cat's ears into the stump so as to remove the cat's ears during subsequent anastomosis. Since the anastomosis line of the linear stapler is linear rather than a clustered purse-string, two thread-hooking needles are provided in the thread-hooking needle assembly of the present invention, and the two thread-hooking needles extend out of the thread-hooking needle housing in two different directions respectively, forming an outward-expanding thread-hooking structure, which can pull the cat's ears into the stump at the starting point position of the anastomosis line and reduce the occurrence of fistulas.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a thread-hooking needle assembly. Background Art

[0002] Digestive tract diseases are one of the high-incidence diseases in humans. During the treatment process, staplers are often used to replace the manual operation of doctors to anastomose physiological tissues such as the digestive tract. During the operation, generally, a linear stapler or an arc-shaped stapler is first used to anastomose and cut tissues. After the linear stapler or the arc-shaped stapler anastomoses the tissues, the formed anastomotic line is linear, and two sharp corners, commonly known as "cat ears", will be formed at both ends of the anastomotic line. If the cat ears are not processed, the risk of anastomotic leakage will be greatly increased after the operation, which is very unfavorable to the patient. Summary of the Invention

[0003] Aiming at the problems in the prior art, the purpose of the present invention is to provide a thread-hooking needle assembly, which can retract the cat ears into the stump after the linear stapler or the arc-shaped stapler anastomoses the tissues, so as to remove the cat ears during subsequent anastomosis.

[0004] An embodiment of the present invention provides a thread-hooking needle assembly, which includes a thread-hooking needle housing and two thread-hooking needles located in the thread-hooking needle housing. The thread-hooking needle includes a needle tip located at the distal end of the thread-hooking needle; the needle tip can protrude outwards from the distal end of the thread-hooking needle housing, and there is an included angle between the protruding directions of the needle tips of the two thread-hooking needles.

[0005] Optionally, the protruding directions of the needle tips of the two thread-hooking needles are deflected towards two opposite directions respectively with respect to the axial direction of the thread-hooking needle housing.

[0006] Optionally, the thread-hooking needle housing includes a housing head located at the distal end of the thread-hooking needle housing, and the housing head is a conical structure with a larger distal end and a smaller proximal end.

[0007] Optionally, the thread-hooking needle includes a pushing portion located at the proximal end of the thread-hooking needle, and the proximal end of the pushing portion protrudes outside the proximal end of the thread-hooking needle housing.

[0008] Optionally, the pushing portions of the two thread-hooking needles are arranged parallel to each other.

[0009] Optionally, a reset member is arranged at the pushing portion of the thread-hooking needle. When an external force is applied to the pushing portion to push the needle tip out from the distal end of the thread-hooking needle housing, the reset member deforms. When the applied external force is eliminated, the deformation restoring force of the reset member causes the needle tip to return to the inside of the thread-hooking needle housing.

[0010] Optionally, the reset member is a compression spring, and a stepped portion is provided at a position corresponding to the distal end of the compression spring on the thread hooking needle housing, and the stepped portion defines the moving position of the distal end of the compression spring.

[0011] Optionally, a stopper is further provided at the distal end of the compression spring. The stopper is fixed to the thread hooking needle, is located on the proximal side of the stepped portion, and the stopper abuts against the stepped portion to limit the moving position of the distal end of the compression spring.

[0012] Optionally, a connecting portion is further provided between the needle tip and the pushing portion of the thread hooking needle, and the connecting portion is a flexible connecting portion.

[0013] Optionally, the connecting portion includes a plurality of connecting pieces arranged side by side.

[0014] Optionally, the thread hooking needle housing includes a first housing and a second housing. The first housing and the second housing are detachably connected, and the two thread hooking needles are arranged between the first housing and the second housing.

[0015] Optionally, a convex block is provided on the inner side surface of the first housing, and a groove corresponding to the convex block is provided on the inner side surface of the second housing, or a groove is provided on the inner side surface of the first housing, and a convex block corresponding to the groove is provided on the inner side surface of the second housing.

[0016] Optionally, two open slots are respectively provided on the inner side surfaces of the first housing and the second housing. When the first housing and the second housing are closed, the two open slots of the first housing are respectively closed with the open slots of the second housing to form two thread hooking needle slots, and the two thread hooking needles are respectively arranged in the two thread hooking needle slots.

[0017] Optionally, a fixing member is further included. A first fixing groove is provided on the inner side surface of the first housing, a fixing hole is provided at a position of the second housing opposite to the first fixing groove, and the fixing member passes through the fixing hole and is inserted into the first fixing groove.

[0018] Optionally, the fixing member and the first fixing groove are in interference fit.

[0019] Optionally, a second fixing groove communicating with the fixing hole is further provided on the outer side surface of the second housing. The fixing member includes a first fixing member and a second fixing member. The first fixing member includes a first end and a second end. The first end of the first fixing member is inserted into the first fixing groove, the second end of the first fixing member is connected to the second fixing member, and the second fixing member is embedded in the second fixing groove.

[0020] Optionally, the first fixing member and the second fixing member are rotatably connected.

[0021] Optionally, the second fixing groove includes a first end and a second end. The first end of the second fixing groove communicates with the fixing hole, and the second end of the second fixing groove extends to the proximal end face of the second housing; the second fixing member includes a first end and a second end. The first end of the second fixing member is connected to the first fixing member, and the second end of the second fixing member extends outwards from the second end of the second fixing groove.

[0022] The wire-hooking needle assembly provided by the present invention has the following advantages:

[0023] The present invention provides a wire-hooking needle assembly. After the linear stapler closes the tissue, the wire-hooking needle assembly can be used to retract the cat ears into the stump, so as to remove the cat ears during subsequent anastomosis; since the anastomosis line of the linear stapler is linear rather than a clustered purse string, two wire-hooking needles are provided in the wire-hooking needle assembly of the present invention, and the two wire-hooking needles extend out of the wire-hooking needle housing in two different directions respectively, forming an outwardly expanding wire-hooking structure, which can pull the cat ears into the stump at the starting point of the anastomosis line and reduce the occurrence of fistulas; in addition, the wire-hooking needle of the present invention is not limited to processing the tissue after anastomosis by the linear stapler, and can be applied to the closed openings of tissues sutured by other methods. Description of the Drawings

[0024] Other features, objects and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0025] Figure 1 is a schematic structural view of the wire-hooking needle assembly removing one side housing according to an embodiment of the present invention;

[0026] Figure 2 is a schematic structural view of the wire-hooking needle according to an embodiment of the present invention;

[0027] Figure 3 is a perspective view of the wire-hooking needle assembly according to an embodiment of the present invention;

[0028] Figure 4 is a front view of the wire-hooking needle assembly according to an embodiment of the present invention;

[0029] Figure 5 is a schematic view of the first wire-hooking needle being pushed out in the wire-hooking needle assembly according to an embodiment of the present invention;

[0030] Figure 6 is a schematic view of both wire-hooking needles being pushed out in the wire-hooking needle assembly according to an embodiment of the present invention;

[0031] Figure 7 is a schematic view of the cooperation between the first housing and the second housing according to an embodiment of the present invention;

[0032] Figure 8 and Figure 9 are schematic diagrams of the first housing of an embodiment of the present invention;

[0033] Figure 10 and Figure 11 are schematic diagrams of the second housing of an embodiment of the present invention;

[0034] Figure 12 is a schematic structural diagram of the thread hooking needle assembly when the fixing member is inserted in an embodiment of the present invention;

[0035] Figure 13 is a schematic diagram of the form when the fixing member is inserted in an embodiment of the present invention;

[0036] Figure 14 is a schematic diagram of the form after the fixing member is inserted in an embodiment of the present invention.

[0037] Reference numerals:

[0038] 1 Thread hooking needle housing 23 Pushing portion of the first thread hooking needle

[0039] 11 Housing head 231 Pushing foot of the first thread hooking needle

[0040] 111 Distal end of the housing head 24 Reset member of the first thread hooking needle

[0041] 112 Proximal end of the housing head 25 Stopping member of the first thread hooking needle

[0042] 12 Housing tail 3 Second thread hooking needle

[0043] 13 Thread hooking needle groove 31 Needle tip of the second thread hooking needle

[0044] 14 Step portion 32 Connecting portion of the second thread hooking needle

[0045] 18 First housing 33 Pushing portion of the second thread hooking needle

[0046] 181 First mating portion 4 Fixing member

[0047] 182 First fixing groove 41 First fixing member

[0048] 19 Second housing 411 First end of the first fixing member

[0049] 191 Second mating portion 412 Second end of the first fixing member

[0050] 192 Fixing hole 42 Second fixing member

[0051] 193 Second fixing groove 421 First end of the second fixing member

[0052] 2 First thread-hooking needle 422 Second end of the second fixing member

[0053] 21 Needle tip of the first thread-hooking needle 43 Fixing pin

[0054] 22 Connecting portion of the first thread-hooking needle Detailed implementation manners

[0055] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and thus their repetitive description will be omitted.

[0056] To solve the technical problems in the prior art, the present invention provides a thread-hooking needle assembly, the thread-hooking needle assembly includes a thread-hooking needle housing and two thread-hooking needles located in the thread-hooking needle housing, the thread-hooking needle includes a needle tip located at the distal end of the thread-hooking needle; the needle tip can extend outward from the distal end of the thread-hooking needle housing, and after the needle tip extends out from the distal end of the thread-hooking needle housing, it can also return to the thread-hooking needle housing along the extending path, and there is an included angle between the extending directions of the needle tips of the two thread-hooking needles, that is, the needle tips of the two thread-hooking needles extend in two directions with a certain included angle respectively.

[0057] In the present invention, the distal end and the proximal end are relative to the operator. The end closer to the operator is the proximal end, and the end farther from the operator, that is, the end closer to the surgical site is the distal end. In the thread-hooking needle assembly, the inner side and the outer side are relative to the axis of the thread-hooking needle housing. The side closer to the axis is the inner side, and the side away from the axis is the outer side.

[0058] During the surgical process of digestive tract diseases, after using a linear stapler to close the tissue, this thread-hooking needle assembly can be used to tuck the cat ears into the stump to remove the cat ears during subsequent anastomosis. When in use, insert the thread-hooking needle assembly into the surgical site, then push the needle tip out from the distal end of the thread-hooking needle housing, puncture the purse string, hook the purse string, then pull the cat ears into the stump through the purse string, and then use instruments such as a circular stapler to cut off the anastomosis line of the stump together with the cat ears, finally forming a smooth circular anastomotic stoma, thereby reducing the occurrence of anastomotic leakage. Since the anastomosis line of the linear stapler is linear rather than a bundled purse string, there are two thread-hooking needles in the thread-hooking needle assembly of the present invention, and the two thread-hooking needles extend out of the thread-hooking needle housing in two different directions respectively, forming an outward-expanding thread-hooking structure, which can pull the cat ears into the stump at the starting point of the anastomosis line and reduce the occurrence of leakage.

[0059] The surgical procedures described above are only examples. In actual operation, the method of suturing tissues before inserting the wire-hooking needle assembly is not limited to using a linear stapler, and the method of removing the cat's ears after the wire-hooking needle assembly pulls the cat's ears into the stump is not limited to using a circular stapler. Using the wire-hooking needle of the present invention to hook the purse-string suture in other occasions is feasible and falls within the protection scope of the present invention.

[0060] The following further introduces the structure of the wire-hooking needle assembly according to an embodiment of the present invention in conjunction with the attached Figures 1 to 14 drawings.

[0061] The present invention provides a wire-hooking needle assembly, which includes a wire-hooking needle housing 1 and two wire-hooking needles 2 and 3 located in the wire-hooking needle housing 1. The compositions of the two wire-hooking needles 2 and 3 are basically the same, both consisting of a distal needle tip, a middle connecting portion, and a proximal pushing portion. The needle tip is barbed and provided with a hook portion facing the proximal direction. Specifically, the first wire-hooking needle 2 includes a needle tip 21, a connecting portion 22, and a pushing portion 23, and the second wire-hooking needle 3 includes a needle tip 31, a connecting portion 32, and a pushing portion 33. The needle tips 21 and 31 can extend outwards from the distal end of the wire-hooking needle housing 1, and after the needle tips 21 and 31 extend out from the distal end of the wire-hooking needle housing 1, they can also return to the wire-hooking needle housing 1 along the extending path, and there is an included angle between the extending directions of the needle tips 21 and 31 of the two wire-hooking needles 2 and 3, that is, the needle tips 21 and 31 of the two wire-hooking needles 2 and 3 extend in two directions with a certain included angle respectively.

[0062] In this embodiment, the extending directions of the needle tips 21 and 31 of the two wire-hooking needles 2 and 3 are deflected in two opposite directions relative to the axis of the wire-hooking needle housing 1. As Figure 6 shown, the needle tip 21 of the first wire-hooking needle 2 extends and retracts along the A1 direction, and the needle tip 31 of the second wire-hooking needle 3 extends and retracts along the A2 direction. The needle tip 21 of the first wire-hooking needle 2 is deflected along the B1 direction relative to the axis S of the wire-hooking needle housing 1, and the needle tip 31 of the second wire-hooking needle 3 is deflected along the B2 direction relative to the axis S of the wire-hooking needle housing 1, and the extending direction of the needle tip 21 of the first wire-hooking needle 2, the extending direction of the needle tip 31 of the second wire-hooking needle 3, and the axis of the wire-hooking needle housing 1 are preferably in the same plane. In the operation of low rectal cancer, the anastomosis lines of the linear or arc-shaped stapler are larger than the diameter of the human anal canal, and when the needle tips 21 of the first wire-hooking needle 2 and the needle tips 31 of the second wire-hooking needle 3 extend distally, they expand outwards, which can better pull the cat's ears in at the starting point of the anastomosis line and reduce the occurrence of fistulas. From Figure 6It can be seen that in this embodiment, the included angle between A1 and S is equal to the included angle between A2 and S, and the needle tips 21 of the first thread-hooking needle 2 and the needle tips 31 of the second thread-hooking needle 3 can symmetrically extend from the distal end of the thread-hooking needle housing 1. However, the present invention is not limited thereto. The included angle between A1 and S may not be equal to the included angle between A2 and S, or there may be an included angle between A1 and S while A2 is parallel to S, or A1 is parallel to S and there is an included angle between A2 and S, etc., all of which fall within the protection scope of the present invention.

[0063] In this embodiment, as Figure 3 and Figure 4 shown, the thread-hooking needle housing 1 includes a housing head 11 at the distal end of the thread-hooking needle housing 1 and a housing tail 12 at the proximal end of the thread-hooking needle housing 1. In order to adapt to the structure of tubular tissues such as the human intestine, the cross-section of the housing of the thread-hooking needle is adaptively circular to better fit with human tissues. Therefore, the outer diameter of the distal housing is similar to the outer diameter of the staple cartridge assembly of a circular stapler. According to different human tissues, different outer diameters can also be provided, such as: 33 mm, 29 mm, 25 mm, etc. The housing head 11 is a conical structure with a larger distal end 111 and a smaller proximal end 112 so that the proximal diameter is smaller than the diameter of the human tubular tissue. That is, the diameter of the housing head 11 of the thread-hooking needle housing gradually decreases from the distal end to the proximal end. In low rectal cancer surgery, after the housing head 11 enters the anus, since the diameter of the housing head 11 gradually decreases, it will not cause continuous dilation of the sphincter, thus reducing the damage to the sphincter function.

[0064] As Figure 1 and Figure 2 shown, a push foot 231 is provided at the proximal end of the pushing part 23 of the first thread-hooking needle 2, and the push foot 231 extends beyond the proximal end of the thread-hooking needle housing 1. Similarly, a push foot is also provided at the proximal end of the pushing part 33 of the second thread-hooking needle 3, and the push foot extends beyond the proximal end of the thread-hooking needle housing 1. In this embodiment, the pushing part 23 of the first thread-hooking needle 2 and the pushing part 33 of the second thread-hooking needle 3 are arranged parallel to each other. And since the needle tips 21 of the first thread-hooking needle 2 and the needle tips 31 of the second thread-hooking needle 3 expand outward, the connecting parts 22 of the first thread-hooking needle 2 and the connecting parts 32 of the second thread-hooking needle 3 are curved. Therefore, the needle tips 21, 31 and the pushing parts 23, 33 of the thread-hooking needle are rigid, while the connecting parts 22, 32 are flexible. In this embodiment, a reset member 24 is provided on the pushing part 23 of the first thread-hooking needle 2. When an external force is applied to the pushing part 23 to push the needle tip 21 out of the distal end of the thread-hooking needle housing 1, the reset member 24 deforms. When the applied external force is eliminated, the deformation restoring force of the reset member 24 causes the needle tip 21 to return to the inside of the thread-hooking needle housing 1. A reset member is also provided on the pushing part 33 of the second thread-hooking needle 3, and its working principle is similar to that of the first thread-hooking needle 2 and will not be elaborated here.

[0065] In addition, the connecting parts 22 and 32 may also be structures respectively including a plurality of connecting pieces arranged side by side. Each connecting piece may be a metal sheet, a plastic sheet, etc. Using the connecting pieces in a side-by-side combination can not only ensure that the connecting parts 22 and 32 have a certain flexible bendability, but also provide sufficient longitudinal connection strength between the needle tips 21 and the pushing parts 23, as well as sufficient longitudinal connection strength between the needle tips 31 and the pushing parts 33, ensuring that when the operator pushes the pushing parts 23 and 33, the thrust can be transmitted to the needle tips 21 and 31 through the connecting parts 22 and 32, and when the operator releases the pushing parts 23 and 33, the restoring force of the restoring member 24 can also be transmitted to the needle tips 21 and 31 through the connecting parts 22 and 32, ensuring the smooth longitudinal movement of the first thread-hooking needle 2 and the second thread-hooking needle 3.

[0066] The restoring member 24 may be a compression spring. A step portion 14 is provided at a position corresponding to the distal end of the compression spring on the thread-hooking needle housing 1. The step portion 14 defines the moving position of the distal end of the compression spring to achieve the positioning of the compression spring, and the proximal end of the compression spring can also be limited by the thread-hooking needle housing 1. Here, taking the first thread-hooking needle 2 as an example to introduce the function of the compression spring, the principle of the second thread-hooking needle 3 is similar. During use, the operator pushes the push foot 231 towards the distal end direction of the thread-hooking needle housing 1. The push foot 231 transmits the thrust to the needle tip 21 through the connecting part 22. While pushing the needle tip 21 out of the distal end of the thread-hooking needle housing 1, the compression spring is also compressed, causing the compression spring to undergo compression deformation. After the needle tip 21 hooks the purse string, the operator releases the push foot 231. Under the action of the deformation restoring force of the compression spring, the needle tip 21 retracts back into the interior of the thread-hooking needle housing 1. The restoring member 24 may also adopt other structures, such as a resilient piece that can be restored after deformation, a tension spring connecting the needle tip 21 and the thread-hooking needle housing 1, etc., which are all within the protection scope of the present invention.

[0067] It can be understood that the needle tips 21 and 31 of the thread-hooking needles 2 and 3 are sharp, which may cause harm to the operator or cause damage to the surrounding tissues when the thread-hooking needles 2 and 3 enter the human tissue. Therefore, in the initial state, the needle tips 21 and 31 of the thread-hooking needles 2 and 3 are located inside the housing.

[0068] In this embodiment, a stop member 25 is further provided at the distal end of the compression spring. The stop member 25 is fixed on the first thread-hooking needle 2. The stop member 25 is located on the proximal side of the step portion 14, and the distal end face of the stop member 25 abuts against the proximal end face of the step portion 14 to limit the moving position of the distal end of the compression spring. A stop member may also be provided on the second thread-hooking needle 3, and a step portion corresponding to the stop member of the second thread-hooking needle 3 may also be provided in the thread-hooking needle housing 1 to limit the distal end of the restoring compression spring of the second thread-hooking needle 3.

[0069] As Figures 7 to 11 shown, in this embodiment, the thread-hooking needle housing 1 includes a first housing 18 and a second housing 19 that can be relatively opened and relatively closed, the first housing 18 and the second housing 19 are detachably connected, and the two thread-hooking needles 2, 3 are arranged between the first housing 18 and the second housing 19. Further, the first thread-hooking needle 2 and the second thread-hooking needle 3 are detachably arranged between the first housing 18 and the second housing 19. When the first housing 18 and the second housing 19 are opened, the first thread-hooking needle 2 and the second thread-hooking needle 3 can be taken out. In this embodiment, a first mating portion 181 is provided on the inner side surface of the first housing 18, and a second mating portion 191 corresponding to the first mating portion 181 one by one is provided on the inner side surface of the second housing 19. The first mating portion and the corresponding second mating portion are detachably connected. As Figure 9 and Figure 10 shown, in this embodiment, the first mating portion 181 is a groove, the second mating portion 191 is a protrusion, and the protrusion and the groove are preferably in an interference fit. However, the present invention is not limited thereto. The first mating portion may also adopt a protrusion, the second mating portion is a corresponding groove, and the first mating portion and the second mating portion may also adopt snap pairs, hook-and-loop pairs, etc. to prevent the relative movement of the first housing 18 and the second housing 19 in the axial direction.

[0070] In this embodiment, at least one first mating portion 181 is provided at a position between the needle heads 21, 31 of the two thread-hooking needles 2, 3 on the housing head of the first housing 18. Correspondingly, at least one second mating portion 191 is provided at a position between the needle heads 21, 31 of the two thread-hooking needles 2, 3 on the housing head of the second housing 19. At positions corresponding to the two outer sides of the connection portions 22, 32 of the two thread-hooking needles 2, 3, at least one first mating portion 181 is respectively provided on the housing tail of the first housing 18. Correspondingly, at positions corresponding to the two outer sides of the connection portions 22, 32 of the two thread-hooking needles 2, 3, at least one second mating portion 191 is respectively provided on the housing tail of the second housing 19. However, the present invention is not limited thereto, and the positions and numbers of the first mating portion 181 and the second mating portion 191 can be selected as needed.

[0071] In this embodiment, two open slots are respectively provided on the inner side surfaces of the first housing 18 and the second housing 19 in a corresponding manner. When the first housing 18 and the second housing 19 are closed, the two open slots of the first housing 18 are respectively closed with the open slots of the second housing 19 to form two thread-hooking needle slots 13, and the two thread-hooking needles 2, 3 are respectively arranged in the two thread-hooking needle slots 13.

[0072] As Figures 9 to 14As shown, in this embodiment, the thread-hooking needle assembly further includes a fixing member 4. An inner side surface of the first housing 18 is provided with a first fixing groove 182. A fixing hole 192 is formed at a position of the second housing 19 opposite to the first fixing groove 182. The fixing member 4 passes through the fixing hole 192 and is inserted into the first fixing groove 182. The first fixing groove 182 may be a blind hole or a through hole penetrating the side wall of the first housing 18. The fixing member 4 and the first fixing groove 182 are preferably in interference fit, and an end face of an end of the fixing member 4 inserted into the first fixing groove 182 is a guiding surface, such as an arc surface or a conical surface, etc., to guide the end of the fixing member 4 to be inserted into the first fixing groove 182.

[0073] In this embodiment, further, an outer side surface of the second housing 19 is further provided with a second fixing groove 193 communicating with the fixing hole 192. The fixing member 4 includes a first fixing member 41 and a second fixing member 42. The first fixing member 41 includes a first end 411 and a second end 412. The second fixing member 42 includes a first end 421 and a second end 422. The first end 411 of the first fixing member 41 is inserted into the first fixing groove 182. The second end 412 of the first fixing member 41 is connected to the first end 421 of the second fixing member 42. The second fixing member 42 is embedded in the second fixing groove 422.

[0074] In this embodiment, the first fixing member 41 and the second fixing member 42 are rotatably connected. Specifically, they can be rotatably connected by a pin 43. As Figure 12 and Figure 13 shown, when the fixing member 4 is inserted into the thread-hooking needle housing 1, the first fixing member 41 and the second fixing member 42 are substantially in a straight line. After the first end 411 of the first fixing member 41 is inserted into the first fixing groove 182, the second fixing member 42 is rotated downward until it is embedded in the second fixing groove 422. At this time, the structures of the first fixing member 41 and the second fixing member 42 are as Figure 14 shown, being an L-shaped structure. However, the present invention is not limited thereto. The first fixing member 41 and the second fixing member 42 can also be set as a non-rotatable fixed connection, that is, fixed as an L-shaped structure and directly inserted into the thread-hooking needle housing 1 in the L-shaped structure.

[0075] In this embodiment, the second fixing groove 193 extends along the axial direction of the thread hook needle housing 1, but the present invention is not limited thereto. The second fixing groove 193 includes a first end and a second end, the first end of the second fixing groove 193 is connected to the fixing hole, and the second end of the second fixing groove 193 extends to the proximal end surface of the second housing 19; the second end 422 of the second fixing member 42 extends outward from the second end of the second fixing groove 193, so that the operator can disassemble the thread hook needle housing 1 conveniently. When the operator needs to replace the thread hook needles 2 and 3 in the thread hook needle housing 1, the operator can first hold the second end 422 of the second fixing member 42, pull it outward, and after the second fixing member 42 and the first fixing member 41 are basically in a straight line, pull the fixing member 4 out of the thread hook needle housing 1 as a whole, and then apply an external force to overcome the matching force between the first matching portion 181 and the second matching portion 191 to separate the first housing 18 and the second housing 19. Then the thread hook needles 2 and 3 are directly taken out. Since the two ends of the compression spring 24 of the thread hooking needle 2, 3 are respectively provided with a stopper, the compression spring 24 and the thread hooking needle are integrated, and they are replaced as a whole during the replacement process, without the operator having to install the compression spring 24 and the thread hooking needle 2, 3 again. Then, the operator puts the new thread hooking needle into the thread hooking needle groove 13, and then aligns the first shell 18 with the second shell 19, and puts the fixing member 4 with the fixing member 4. Figure 12 The second fixing member 42 is inserted into the first fixing groove 182 in the posture of the second fixing member 42, and the second fixing member 42 is rotated around the first end 421 of the second fixing member 42 until the second fixing member 42 is embedded in the second fixing groove 193, and the replacement of the thread hooking needle in the thread hooking needle assembly is completed. The entire thread hooking needle assembly has a high structural stability after assembly, and is very convenient to install and disassemble.

[0076] The thread hook needle assembly provided by the present invention has the following advantages:

[0077] The present invention provides a hook thread needle assembly, which can be used to collect cat ears into the stump after a linear stapler closes tissue, so as to remove the cat ears during subsequent anastomosis; since the anastomotic line of a linear stapler is linear rather than a clustered purse, two hook thread needles are provided in the hook thread needle assembly of the present invention, and the two hook thread needles extend out of the hook thread needle housing in two different directions respectively, forming an outwardly expanding hook thread structure, which can pull the cat ears into the stump at the starting point of the anastomotic line, thereby reducing the occurrence of fistula; in addition, the hook thread needle of the present invention is not limited to processing tissue after anastomosis by a linear stapler, and can be applicable to closed openings of tissues sutured in other ways.

[0078] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A wire-hooking needle assembly, characterized in that, after the stapler anastomoses tissues, it is used to receive the sharp corners at both ends of the anastomosis thread into the stump. The assembly includes a wire-hooking needle housing and two wire-hooking needles located in the wire-hooking needle housing. The wire-hooking needle includes a needle tip located at the distal end of the wire-hooking needle; the wire-hooking needle housing includes a housing head located at the distal end of the wire-hooking needle housing, and the housing head is a conical structure with a larger distal end and a smaller proximal end; In the initial state, the needle tip of the wire-hooking needle is located inside the housing, the needle tip can extend outwards from the distal end of the wire-hooking needle housing, and there is an included angle between the extending directions of the needle tips of the two wire-hooking needles; The wire-hooking needle includes a pushing part located at the proximal end of the wire-hooking needle. The proximal end of the pushing part extends outside the proximal end of the wire-hooking needle housing. A connecting part is also provided between the needle tip of the wire-hooking needle and the pushing part, and the connecting part is a flexible connecting part.

2. The wire-hooking needle assembly according to claim 1, characterized in that, the extending directions of the needle tips of the two wire-hooking needles are deflected towards two opposite directions respectively relative to the axis of the wire-hooking needle housing.

3. The wire-hooking needle assembly according to claim 1, characterized in that, the pushing parts of the two wire-hooking needles are arranged parallel to each other.

4. The wire-hooking needle assembly according to claim 1, characterized in that, a reset member is provided at the pushing part. When an external force is applied to the pushing part to push the needle tip out from the distal end of the wire-hooking needle housing, the reset member deforms. When the applied external force is eliminated, the deformation restoring force of the reset member causes the needle tip to return to the inside of the wire-hooking needle housing.

5. The wire-hooking needle assembly according to claim 4, characterized in that, the reset member is a compression spring, and a step portion is provided at a position corresponding to the distal end of the compression spring on the wire-hooking needle housing, and the step portion defines the moving position of the distal end of the compression spring.

6. The wire-hooking needle assembly according to claim 5, characterized in that, a stop member is further provided at the distal end of the compression spring. The stop member is fixed on the wire-hooking needle, the stop member is located on the proximal side of the step portion, and the stop member abuts against the step portion to limit the moving position of the distal end of the compression spring.

7. The wire-hooking needle assembly according to claim 1, characterized in that, the connecting part includes a plurality of connecting pieces arranged side by side.

8. The wire-hooking needle assembly according to claim 1, characterized in that, the wire-hooking needle housing includes a first housing and a second housing. The first housing and the second housing are detachably connected, and the two wire-hooking needles are arranged between the first housing and the second housing.

9. The wire-hooking needle assembly according to claim 8, characterized in that, a convex block is provided on the inner side surface of the first housing, and a groove corresponding to the convex block is provided on the inner side surface of the second housing, or a groove is provided on the inner side surface of the first housing, and a convex block corresponding to the groove is provided on the inner side surface of the second housing.

10. The wire-hooking needle assembly according to claim 8, characterized in that, Two open slots are respectively provided on the inner sides of the first housing and the second housing. When the first housing and the second housing are closed, the two open slots of the first housing are respectively closed with the open slots of the second housing to form two thread-hooking needle slots, and the two thread-hooking needles are respectively arranged in the two thread-hooking needle slots.

11. The thread-hooking needle assembly according to claim 8, characterized in that, further comprising a fixing member. A first fixing groove is provided on the inner side of the first housing, and a fixing hole is formed at a position of the second housing opposite to the first fixing groove. The fixing member passes through the fixing hole and then is inserted into the first fixing groove.

12. The thread-hooking needle assembly according to claim 11, characterized in that, the fixing member and the first fixing groove are in interference fit.

13. The thread-hooking needle assembly according to claim 11, characterized in that, a second fixing groove communicating with the fixing hole is further formed on the outer side of the second housing. The fixing member comprises a first fixing member and a second fixing member. The first fixing member comprises a first end and a second end. The first end of the first fixing member is inserted into the first fixing groove, the second end of the first fixing member is connected to the second fixing member, and the second fixing member is embedded in the second fixing groove.

14. The thread-hooking needle assembly according to claim 13, characterized in that, the first fixing member and the second fixing member are rotatably connected.

15. The thread-hooking needle assembly according to claim 14, characterized in that, the second fixing groove comprises a first end and a second end. The first end of the second fixing groove communicates with the fixing hole, and the second end of the second fixing groove extends to the near end face of the second housing; the second fixing member comprises a first end and a second end. The first end of the second fixing member is connected to the first fixing member, and the second end of the second fixing member extends outwards from the second end of the second fixing groove.

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