CN111317531A - Thread hooking needle assembly - Google Patents

Abstract

The invention provides a line hooking needle assembly, which comprises a line hooking needle shell and two line hooking needles positioned in the line hooking needle shell, wherein each line hooking needle comprises a needle head positioned at the far end of the line hooking needle; the needle head can extend out from the far end of the thread hooking needle shell, and an included angle is formed between the extending directions of the needle heads of the two thread hooking needles. By adopting the invention, after the linear anastomat closes the tissue, the cat ear can be drawn into the stub by adopting the thread hooking needle so as to be conveniently removed in the subsequent anastomosis; because the anastomotic line of the linear anastomat is linear instead of a bunched pouch, the two crocheting needles are arranged in the crocheting needle assembly and extend out of the crocheting needle shell respectively towards two different directions to form an outward-expanded crocheting structure, so that the cat ear can be pulled into the residual end at the starting point position of the anastomotic line, and the occurrence of fistula is reduced.

Description

Thread hooking needle assembly

Technical Field

The invention relates to the technical field of medical instruments, in particular to a thread hooking needle assembly.

Background

Digestive tract diseases are one of the high-grade diseases of human beings, and in the treatment process, an anastomat is often used for performing anastomosis on physiological tissues such as the digestive tract instead of manual operation of a doctor. In the operation process, tissues are anastomosed and cut by using a linear anastomat or an arc-line anastomat, after the tissues are anastomosed by the linear anastomat or the arc-line anastomat, the formed anastomotic line is linear, and two sharp corners are formed at two ends of the anastomotic line, which are commonly called as cat ears. If the cat ear is not treated, the risk of anastomotic fistula can be greatly increased after the operation, which is very unfavorable for the patient.

Disclosure of Invention

In view of the problems in the prior art, it is an object of the present invention to provide a needle assembly for hooking a wire, which can be used to retract a cat ear into a stump after a linear stapler or an arc stapler has stapled tissue, so as to remove the cat ear during subsequent anastomosis.

The embodiment of the invention provides a thread hooking needle assembly, which comprises a thread hooking needle shell and two thread hooking needles positioned in the thread hooking needle shell, wherein each thread hooking needle comprises a needle head positioned at the far end of the thread hooking needle; the needle head can extend out from the far end of the thread hooking needle shell, and an included angle is formed between the extending directions of the needle heads of the two thread hooking needles.

Optionally, the protruding directions of the needle heads of the two crochet needles are respectively deflected towards two opposite directions relative to the axial direction of the crochet needle shell.

Optionally, the crochet hook housing comprises a housing head located at a distal end of the crochet hook housing, and the housing head is a tapered structure with a large distal end and a small proximal end.

Optionally, the thread hooking needle comprises a pushing-out part located at the proximal end of the thread hooking needle, and the proximal end of the pushing-out part extends out of the proximal end of the thread hooking needle housing.

Optionally, the pushing-out portions of the two crocheting needles are arranged in parallel with each other.

Optionally, a reset piece is arranged at the pushing-out part of the thread hooking needle, when external force is applied to the pushing-out part to push the needle head out of the far end of the thread hooking needle shell, the reset piece deforms, and when the applied external force is eliminated, the deformation restoring force of the reset piece enables the needle head to return to the inside of the thread hooking needle shell.

Optionally, the reset member is a pressure spring, a stepped portion is disposed at a position of the needle hooking housing corresponding to the distal end of the pressure spring, and the stepped portion defines a moving position of the distal end of the pressure spring.

Optionally, the distal end of the pressure spring is further provided with a stop member, the stop member is fixed to the hook needle, the stop member is located on the proximal end side of the stepped portion, and the stop member and the stepped portion abut against each other to limit the moving position of the distal end of the pressure spring.

Optionally, a connecting portion is further arranged between the needle head of the suture hooking needle and the pushing-out portion, and the connecting portion is a flexible connecting portion.

Optionally, the connecting portion comprises a plurality of connecting pieces arranged side by side.

Optionally, the thread hooking needle housing comprises 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.

Optionally, a protrusion is disposed on an inner side surface of the first casing, a groove corresponding to the protrusion is disposed on an inner side surface of the second casing, or a groove is disposed on an inner side surface of the first casing, and a protrusion corresponding to the groove is disposed on an inner side surface of the second casing.

Optionally, two open grooves are respectively formed in inner side surfaces of the first shell and the second shell, when the first shell and the second shell are closed, the two open grooves of the first shell and the open grooves of the second shell are respectively closed to form two crochet hook grooves, and the two crochet hooks are respectively arranged in the two crochet hook grooves.

Optionally, the portable electronic device further comprises a fixing member, wherein a first fixing groove is formed in an inner side surface of the first shell, a fixing hole is formed in a position, opposite to the first fixing groove, of the second shell, and the fixing member penetrates through the fixing hole and then is inserted into the first fixing groove.

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

Optionally, a second fixing groove communicated with the fixing hole is further formed in the outer side surface of the second shell, 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 with the second fixing member, and the second fixing member is embedded in the second fixing groove.

Optionally, the first and second fixtures are rotatably connected.

Optionally, the second fixing groove comprises a first end and a second end, the first end of the second fixing groove is communicated with the fixing hole, and the second end of the second fixing groove extends to the proximal end face of the second shell; 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 outward from the second end of the second fixing groove.

The thread hooking needle assembly provided by the invention has the following advantages:

the invention provides a thread hooking needle assembly, which can be used for retracting a cat ear into a stub after a linear anastomat closes a tissue so as to remove the cat ear during subsequent anastomosis; because the anastomotic line of the linear anastomat is linear instead of a bunched pouch, the two crocheting needles are arranged in the crocheting needle assembly and extend out of the crocheting needle shell respectively towards two different directions to form an outward-expanded crocheting structure, so that the cat ear can be pulled into the residual end at the starting point position of the anastomotic line, and the occurrence of fistula is reduced; in addition, the suture needle of the present invention is not limited to the treatment of the tissue after the anastomosis by the linear stapler, and may be applied to a closed opening in which the tissue is sutured by other means.

Drawings

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

FIG. 1 is a schematic view of a needle assembly with a housing removed from one side thereof according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a needle for hooking thread according to an embodiment of the present invention;

FIG. 3 is a perspective view of a needle assembly for use with the present invention;

FIG. 4 is an elevational view of a crochet needle assembly in accordance with one embodiment of the present invention;

FIG. 5 is a schematic view of the first needle assembly of the present invention showing the first needle being pushed out;

FIG. 6 is a schematic view of the needle assembly of the present invention with both needles pushed out;

FIG. 7 is a schematic view of the mating of the first housing and the second housing of an embodiment of the present invention;

FIGS. 8 and 9 are schematic views of a first housing of an embodiment of the present invention;

FIGS. 10 and 11 are schematic views of a second housing of an embodiment of the present invention;

FIG. 12 is a schematic view of a needle assembly for holding a suture when a fastener is inserted in accordance with an embodiment of the present invention;

FIG. 13 is a schematic view of a fastener of one embodiment of the invention in an inserted state;

fig. 14 is a schematic view of a fixing member according to an embodiment of the present invention after insertion.

Reference numerals:

1 hook needle casing 23 first hook needle push-out part

11 pushing pin of first hook needle of shell head 231

111 reset piece of 24 first crocheting needles at far end of head of shell

112 housing head proximal end 25 first crochet hook stop

12 casing tail 3 second crochet needle

13 hook wire needle groove 31 needle head of second hook wire needle

14 step part 32 second crocheting needle connecting part

18 first housing 33 second hook needle push-out part

181 first fitting part 4 fixing part

182 first fixing groove 41 first fixing member

19 first end of first fixing member of second housing 411

191 second mating portion 412 a second end of the first fastener

192 fixing hole 42 second fixing piece

193 second fixing groove 421 first end of second fixing member

2 the second end of the second fixing part of the first thread hooking needle 422

Needle head 43 fixing pin of 21 first thread hooking needle

22 connecting part of first crocheting needle

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

In order to solve the technical problems in the prior art, the invention provides a crocheting needle assembly, which comprises a crocheting needle shell and two crocheting needles positioned in the crocheting needle shell, wherein each crocheting needle comprises a needle head positioned at the far end of the crocheting needle; the syringe needle can follow the distal end of colluding the line needle casing is outwards stretched out, stretches out the back at the syringe needle from the distal end of colluding the line needle casing, also can return to colluding the line needle casing again along the route that stretches out, just two the syringe needle of colluding the line needle stretch out an contained angle between the direction, and two syringe needles of colluding the line needle stretch out respectively to two directions that have certain contained angle promptly.

In the present invention, the distal end and the proximal end are relative to the operator, and the end closer to the operator is the proximal end, and the end farther from the operator, i.e., the end closer to the surgical site is the distal end. In the crochet needle component, the inner side and the outer side are relative to the axis of the crochet needle shell, one side close to the axis is the inner side, and one side far away from the axis is the outer side.

During surgery for digestive tract diseases, after the tissue is closed using the linear stapler, the cat ear can be retracted into the stump using the crochet needle assembly to remove the cat ear during subsequent anastomosis. When the anastomat is used, the thread hooking needle assembly is inserted into an operation position, the needle head is pushed out from the far end of the thread hooking needle shell to puncture the purse string, the purse string is hooked, the cat ear is pulled into the stub through the purse string, the anastomosis string at the stub and the cat ear are cut off by adopting instruments such as a circular tube type anastomat and the like, and finally a smooth annular anastomosis opening is formed, so that the occurrence of anastomosis fistula is reduced. Because the anastomotic line of the linear anastomat is linear instead of a bunched pouch, the two crocheting needles are arranged in the crocheting needle assembly and extend out of the crocheting needle shell respectively towards two different directions to form an outward-expanded crocheting structure, so that the cat ear can be pulled into the residual end at the starting point position of the anastomotic line, and the occurrence of fistula is reduced.

The above-described procedure is merely an example, and in practice, the method of suturing tissue used before insertion of the hook needle assembly is not limited to the use of a linear stapler, nor is the method of cutting a cat ear after the hook needle assembly has pulled the cat ear into the stump limited to the use of a circular tube-type stapler. The thread hooking needle can be used for hooking the purse string in other occasions and belongs to the protection scope of the invention.

The structure of the needle assembly for hooking thread according to an embodiment of the present invention will be further described with reference to fig. 1 to 14.

The invention provides a thread hooking needle assembly which comprises a thread hooking needle housing 1 and two thread hooking needles 2 and 3 positioned in the thread hooking needle housing 1. The two thread hooking needles 2 and 3 are basically the same in composition and are composed of a needle head at the far end, a connecting part at the middle part and a pushing-out part at the near end, and the needle head is barbed and provided with a hook part facing to the near end. Specifically, the first hooking needle 2 includes a needle head 21, a connecting portion 22 and a pushing-out portion 23, and the second hooking needle 3 includes a needle head 31, a connecting portion 32 and a pushing-out portion 33. The pinhead 21, 31 can follow the distal end of the crocheting needle housing 1 stretches out outwards, and after the pinheads 21 and 31 stretch out from the distal end of the crocheting needle housing 1, the crocheting needle housing 1 can also be returned along the stretching path, and an included angle is formed between the stretching directions of the pinheads 21 and 31 of the two crocheting needles 2 and 3, namely, the pinheads 21 and 31 of the two crocheting needles 2 and 3 stretch out respectively to two directions with a certain included angle.

In this embodiment, the projecting directions of the needle tips 21, 31 of the two barbed needles 2, 3 are deflected in two opposite directions with respect to the axial direction of the barbed needle housing 1, respectively. As shown in FIG. 6, the needle tip 21 of the first crochet needle 2 is extended and retracted in the A1 direction, and the needle tip 31 of the second crochet needle 3 is extended and retracted in the A2 direction. The needle head 21 of the first crocheting needle 2 is deflected in the direction B1 with respect to the axial direction S of the crocheting needle housing 1, the needle head 31 of the second crocheting needle 3 is deflected in the direction B2 with respect to the axial direction S of the crocheting needle housing 1, and the projecting direction of the needle head 21 of the first crocheting needle 2, the projecting direction of the needle head 31 of the second crocheting needle 3, and the axis of the crocheting needle housing 1 are preferably on the same plane. In the operation of low rectal cancer, the anastomotic line of the linear type or the arc type anastomat is larger than the diameter of the anal canal of a human body, and the needle head 21 of the first thread hooking needle 2 and the needle head 31 of the second thread hooking needle 3 are expanded outwards when extending to the far end, so that the cat ear can be pulled in at the initial point position of the anastomotic line better, and the occurrence of fistula is reduced. As can be seen from fig. 6, in this embodiment, the included angle between a1 and S is equal to the included angle between a2 and S, and the needle tip 21 of the first crochet needle 2 and the needle tip 31 of the second crochet needle 3 can symmetrically protrude from the distal end of the crochet needle housing 1. However, the present invention is not limited thereto, and the included angle between a1 and S may not be equal to the included angle between a2 and S, or an included angle between a1 and S may exist, while a2 is parallel to S, or a1 is parallel to S, and an included angle between a2 and S, etc., all of which fall within the protection scope of the present invention.

In this embodiment, as shown in fig. 3 and 4, the housing 1 comprises a housing head 11 at the distal end of the housing 1 and a housing tail 12 at the proximal end of the housing 1. In order to adapt to the structures of tubular tissues such as intestinal tracts of human bodies, the cross section of the shell of the suture needle is adaptively circular so as to be more attached to the tissues of the human bodies. Therefore, the outer diameter of the far-end shell is similar to that of a nail bin assembly of the circular tube type anastomat, and different outer diameters can be set according to different human tissues, for example: 33 mm, 29 mm, 25 mm, etc. The housing head 11 is of a conical configuration with a larger distal end 111 than a smaller proximal end 112 so that the proximal diameter is smaller than the diameter of the body's tubular tissue. I.e. the housing head 11 of the crochet housing tapers in diameter from the distal end to the proximal end. In the low rectal cancer operation, after the shell head 11 enters the anus, the diameter of the shell head 11 is gradually reduced, so that the sphincter can not be continuously expanded, and the damage to the function of the sphincter is reduced.

As shown in FIGS. 1 and 2, the proximal end of the pushing-out portion 23 of the first thread hooking needle 2 is provided with a pushing leg 231, and the pushing leg 231 extends out of the proximal end of the thread hooking needle housing 1. Similarly, the proximal end of the pushing-out portion 33 of the second hook needle 3 is provided with a pushing leg, which extends out of the proximal end of the hook needle housing 1. In this embodiment, the pushing-out portion 23 of the first knitting needle 2 and the pushing-out portion 33 of the second knitting needle 3 are arranged in parallel with each other. And since the needle head 21 of the first hooking needle 2 and the needle head 31 of the second hooking needle 3 are outwardly expanded, the connecting part 22 of the first hooking needle 2 and the connecting part 32 of the second hooking needle 3 are bent. Therefore, the needle head 21, 31 and the push-out portion 23, 33 of the crochet needle are rigid, and the connecting portion 22, 32 is flexible. In this embodiment, the pushing-out portion 23 of the first crocheting needle 2 is provided with a resetting piece 24, when an external force is applied to the pushing-out portion 23 to push the needle head 21 out of the distal end of the crocheting needle housing 1, the resetting piece 24 deforms, and when the applied external force is removed, the deformation restoring force of the resetting piece 24 enables the needle head 21 to return to the inside of the crocheting needle housing 1. The pushing-out part 33 of the second thread hooking needle 3 is also provided with a resetting piece, and the working principle of the resetting piece is similar to that of the first thread hooking needle 2, and the details are not repeated.

The connection portions 22 and 32 may be configured to include a plurality of connection pieces arranged side by side. Each connecting piece can be a metal sheet, a plastic sheet and the like, and the connecting pieces are combined together in parallel for use, so that not only can certain bendable flexibility of the connecting parts 22 and 32 be ensured, but also enough connecting strength along the longitudinal direction between the needle head 21 and the pushing-out part 23 and enough connecting strength along the longitudinal direction between the needle head 31 and the pushing-out part 33 can be provided, the pushing force can be transmitted to the needle heads 21 and 31 through the connecting parts 22 and 32 when an operator pushes the pushing-out part 23 and the pushing-out part 33, and when the operator releases the pushing-out parts 23 and 33, the restoring force of the restoring piece 24 can be transmitted to the needle heads 21 and 31 through the connecting parts 22 and 32, and the smoothness of the longitudinal movement of the first thread hooking needle 2 and the second thread hooking needle 3 is ensured.

The piece that resets 24 can be the pressure spring, collude line needle casing 1 with the position that the distal end of pressure spring corresponds is provided with step portion 14, step portion 14 is injectd the shift position of the distal end of pressure spring realizes the location of pressure spring, and the near-end of pressure spring can be spacing by colluding line needle casing 1 equally. The function of the compression spring will be described below by taking the first hook needle 2 as an example, and the second hook needle 3 has a similar principle. When the needle is used, an operator pushes the push leg 231 towards the distal end direction of the crochet hook shell 1, the push leg 231 transmits the pushing force to the needle head 21 through the connecting part 22, and the needle head 21 is pushed out from the distal end of the crochet hook shell 1, and meanwhile, the compression spring is compressed, so that the compression spring generates compression deformation. After the needle 21 hooks the purse string, the operator releases the push foot 231, and the needle 21 retracts into the interior of the hook needle housing 1 again under the deformation restoring force of the compression spring. The reset element 24 may also adopt other structures, such as a resilient sheet that can be restored after deformation, a tension spring that connects the needle 21 and the crochet hook housing 1, and the like, all of which are within the protection scope of the present invention.

It will be appreciated that the needle head 21, 31 of the crochet hook 2, 3 is sharp and may cause injury to an operator or damage to surrounding tissue when the crochet hook 2, 3 enters human tissue, and therefore the needle head 21, 31 of the crochet hook 2, 3 is located in the housing in the initial state.

In this embodiment, the distal end of the compressed spring is further provided with a stopper 25, the stopper 25 is fixed on the first suture hooking needle 2, the stopper 25 is located on the proximal end side of the stepped portion 14, and the distal end surface of the stopper 25 is in contact with the proximal end surface of the stepped portion 14 to limit the moving position of the distal end of the compressed spring. The second thread hooking needle 3 can also be provided with a stop part, and the thread hooking needle housing 1 can also be provided with a step part corresponding to the stop part of the second thread hooking needle 3 to limit the far end of the reset pressure spring of the second thread hooking needle 3.

In this embodiment, as shown in fig. 7 to 11, the housing 1 of the hook needle includes a first housing 18 and a second housing 19 which can be opened and closed relatively, the first housing 18 and the second housing 19 are detachably connected, and the two hook needles 2 and 3 are disposed between the first housing 18 and the second housing 19. Further, the first hooking needle 2 and the second hooking needle 3 are detachably provided between the first housing 18 and the second housing 19. When the first case 18 and the second case 19 are opened, the first hook needle 2 and the second hook needle 3 can be taken out. In this embodiment, the inner side surface of the first housing 18 is provided with a first matching portion 181, and the inner side surface of the second housing 19 is provided with a second matching portion 191 corresponding to the first matching portion 181 in a one-to-one manner. The first matching parts are detachably connected with the corresponding second matching parts. As shown in fig. 9 and 10, in this embodiment, the first fitting portion 181 is a groove, the second fitting portion 191 is a projection, and the projection and the groove are preferably an interference fit. However, the present invention is not limited to this, the first matching portion may also adopt a protrusion, the second matching portion is a corresponding groove, and the first matching portion and the second matching portion may also adopt a snap pair, a hook and loop pair, etc. to prevent the first housing 18 and the second housing 19 from moving relatively in the axial direction.

In this embodiment, the housing head of the first housing 18 is provided with at least one first fitting portion 181 at a position between the needle heads 21, 31 of the two barbed needles 2, 3, and correspondingly, the housing head of the second housing 19 is provided with at least one second fitting portion 191 at a position between the needle heads 21, 31 of the two barbed needles 2, 3. The positions of the shell tail of the first shell 18 corresponding to the two outer sides of the connecting portions 22 and 32 of the two hook needles 2 and 3 are respectively provided with at least one first matching portion 181, and correspondingly, the positions of the shell tail of the second shell 19 corresponding to the two outer sides of the connecting portions 22 and 32 of the two hook needles 2 and 3 are respectively provided with at least one second matching portion 191. However, the present invention is not limited thereto, and the positions and the number of the first engagement portion 181 and the second engagement portion 191 may be selected as needed.

In this embodiment, two open grooves are correspondingly formed on the inner side surfaces of the first housing 18 and the second housing 19, when the first housing 18 and the second housing 19 are closed, the two open grooves of the first housing 18 and the open grooves of the second housing 19 are closed to form two crochet hook grooves 13, and the two crochet hooks 2 and 3 are respectively disposed in the two crochet hook grooves 13.

As shown in fig. 9 to 14, in this embodiment, the needle hooking assembly further includes a fixing member 4, the first fixing groove 182 is disposed on the inner side surface of the first housing 18, a fixing hole 192 is disposed at a position of the second housing 19 opposite to the first fixing groove 182, and the fixing member 4 is inserted into the first fixing groove 182 after passing through the fixing hole 192. The first fixing groove 182 may be a blind hole or a through hole penetrating through the sidewall of the first housing 18. The fixing member 4 and the first fixing groove 182 are preferably in interference fit, and an end surface of the fixing member 4 inserted into the end portion of the first fixing groove 182 is a guide surface, such as an arc surface or a tapered surface, to guide the end portion of the fixing member 4 to be inserted into the first fixing groove 182.

In this embodiment, further, a second fixing groove 193 communicating with the fixing hole 192 is further formed on the outer side surface of the second housing 19, 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, and 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, and the second fixing member 42 is embedded in the second fixing groove 422.

In this embodiment, the first fixing member 41 and the second fixing member 42 are rotatably connected. In particular, it may be rotatably connected by a pin 43. As shown in fig. 12 and 13, when the fixing member 4 is inserted into the crochet needle casing 1, the first fixing member 41 and the second fixing member 42 are substantially aligned, and 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 to be inserted into the second fixing groove 422, and at this time, the first fixing member 41 and the second fixing member 42 have an L-shaped structure as shown in fig. 14. But the invention is not limited thereto. The first fixing member 41 and the second fixing member 42 may also be fixedly connected to each other in a non-rotatable manner, i.e., fixed in an L-shaped configuration, and directly inserted into the crochet needle housing 1 in the L-shaped configuration.

In this embodiment, the second fixing groove 193 extends in the axial direction of the crochet hook 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 communicates with the fixing hole, and the second end of the second fixing groove 193 extends to the proximal end face of the second housing 19; the second end 422 of the second fixing member 42 extends out from the second end of the second fixing groove 193, so that the operator can conveniently detach the crocheting needle housing 1. When the operator needs to replace the crochet needle 2, 3 in the crochet needle housing 1, the operator can firstly hold the second end 422 of the second fixing member 42, pull out the second fixing member 42 and the first fixing member 41 to be basically in a straight line, pull out the whole fixing member 4 from the crochet needle housing 1, 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 hooking needles 2 and 3 are directly taken out. Because the two ends of the pressure spring 24 of the crocheting needles 2 and 3 are respectively provided with the stopping parts, the pressure spring 24 and the crocheting needles are integrated, and are integrally replaced in the replacement process, and an operator does not need to install the pressure spring 24 and the crocheting needles 2 and 3. Then, the operator puts a new crochet needle into the crochet needle groove 13, aligns the first housing 18 and the second housing 19, inserts the fixing member 4 into the first fixing groove 182 in the posture shown in fig. 12, rotates the second fixing member 42 around the first end 421 of the second fixing member 42 until the second fixing member 42 is inserted into the second fixing groove 193, and the replacement of the crochet needle in the crochet needle assembly is completed. The whole crochet hook component has high structural stability after being combined, and is very convenient to mount and dismount.

The thread hooking needle assembly provided by the invention has the following advantages:

the invention provides a thread hooking needle assembly, which can be used for retracting a cat ear into a stub after a linear anastomat closes a tissue so as to remove the cat ear during subsequent anastomosis; because the anastomotic line of the linear anastomat is linear instead of a bunched pouch, the two crocheting needles are arranged in the crocheting needle assembly and extend out of the crocheting needle shell respectively towards two different directions to form an outward-expanded crocheting structure, so that the cat ear can be pulled into the residual end at the starting point position of the anastomotic line, and the occurrence of fistula is reduced; in addition, the suture needle of the present invention is not limited to the treatment of the tissue after the anastomosis by the linear stapler, and may be applied to a closed opening in which the tissue is sutured by other means.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (18)

1. A thread hooking needle assembly is characterized by comprising a thread hooking needle shell and two thread hooking needles positioned in the thread hooking needle shell, wherein each thread hooking needle comprises a needle head positioned at the far end of the thread hooking needle;

the needle head can extend out from the far end of the thread hooking needle shell, and an included angle is formed between the extending directions of the needle heads of the two thread hooking needles.

2. The crochet needle assembly of claim 1, wherein the protruding directions of the needle tips of the two crochet needles are deflected in two opposite directions with respect to the axial direction of the crochet needle housing, respectively.

3. The crochet needle assembly of claim 1, wherein the crochet needle housing comprises a housing head at a distal end of the crochet needle housing, the housing head being of a conical configuration with a larger distal end and a smaller proximal end.

4. The crochet needle assembly of claim 1, wherein the crochet needle comprises a push-out portion at a proximal end of the crochet needle, the proximal end of the push-out portion extending beyond the proximal end of the crochet needle housing.

5. The crochet needle assembly of claim 4, wherein the pushing-out portions of the two crochet needles are arranged in parallel with each other.

6. The crochet needle assembly of claim 4, wherein the pushing-out part is provided with a resetting piece, the resetting piece deforms when external force is applied to the pushing-out part to push the needle head out of the far end of the crochet needle housing, and the deformation restoring force of the resetting piece enables the needle head to return to the inside of the crochet needle housing when the applied external force is eliminated.

7. The needle assembly of claim 6, wherein the reset element is a compression spring, and the needle housing is provided with a step at a position corresponding to a distal end of the compression spring, and the step defines a moving position of the distal end of the compression spring.

8. The needle assembly of claim 7, wherein the distal end of the compression spring is further provided with a stopper fixed to the needle, the stopper is located on the proximal side of the step, and the stopper limits the moving position of the distal end of the compression spring against the step.

9. The needle assembly of claim 4, wherein a connection part is further provided between the needle head and the pushing-out part of the needle, and the connection part is a flexible connection part.

10. The needle assembly of claim 9, wherein the connecting portion comprises a plurality of connecting tabs disposed side-by-side.

11. The crocheting needle assembly of claim 1, wherein the crocheting needle housing comprises a first housing and a second housing, the first housing and the second housing are detachably connected, and the two crocheting needles are arranged between the first housing and the second housing.

12. The needle assembly of claim 11, wherein the first housing has a protrusion on the inner surface thereof, and the second housing has a groove on the inner surface thereof corresponding to the protrusion, or the first housing has a groove on the inner surface thereof corresponding to the protrusion.

13. The needle assembly of claim 11, wherein the inner side surfaces of the first and second housings are respectively provided with two open grooves, and when the first and second housings are closed, the two open grooves of the first housing are respectively closed with the open grooves of the second housing to form two needle grooves, and the two needles are respectively disposed in the two needle grooves.

14. The needle assembly of claim 11, further comprising a fixing member, wherein a first fixing groove is formed on an inner side surface of the first housing, a fixing hole is formed at a position of the second housing opposite to the first fixing groove, and the fixing member is inserted into the first fixing groove after passing through the fixing hole.

15. The needle assembly of claim 14, wherein the retaining member is an interference fit with the first retaining groove.

16. The needle assembly of claim 14, wherein the outer side of the second housing further defines a second fixing groove communicating with the fixing hole, 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.

17. The needle assembly of claim 16 wherein said first and second anchors are rotatably connected.

18. The needle assembly of claim 16 wherein said second retaining groove includes a first end and a second end, said first end of said second retaining groove being in communication with said retaining aperture, said second end of said second retaining groove extending to said proximal face of said 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 outward from the second end of the second fixing groove.

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