CN111870299A - Outward-turning type annular anastomat with fixing device - Google Patents

Abstract

The invention provides an outward-turning type annular anastomat with a fixing device, which comprises a nail anvil part, a nail bin part and a fixing part, wherein the nail anvil part comprises a left nail anvil and a right nail anvil which can be separated, the left nail anvil and the right nail anvil are connected in a rotating mode, the nail bin part comprises a left nail bin and a right nail bin which can be separated, the left nail bin and the right nail bin are connected in a rotating mode, the fixing part comprises a fixing device for fixing outward-turned tissues on the outer surface of the nail anvil part, a puncture needle is arranged on the fixing device, and the fixing device is fixed on the outer surface of the nail anvil part through the puncture needle. The technical scheme of the invention can conveniently fix the everted tissue on the outer wall of the anastomat, and the two problems of separation and tissue fixation after suturing are solved on the instrument; the instrument is convenient to open after the operation is finished; the fixing method is easy to realize and has good operability.

Description

Outward-turning type annular anastomat with fixing device

Technical Field

The invention relates to the field of medical instruments, in particular to an outward-turning type annular anastomat with a fixing device, and further relates to the field of digestive tract anastomats.

Background

The anastomat is a device widely used in medicine to replace manual suture, the main working principle is to cut and anastomose tissues by using titanium nails, and the anastomat is particularly suitable for operations of hollow organs such as esophagus, stomach, small intestine, large intestine, rectum and the like, and can be used for the operations of the hollow organs.

At present, a linear cutting anastomat and a circular anastomat are mainly used in an operation, a long pipe is arranged on a body of each of the linear cutting anastomat and the circular anastomat for conveniently extending into a human body, the circular anastomat is generally used for aiming at circular suture openings of cavity tissues such as esophagus, small intestine and the like, when the circular anastomat is used for performing lumen tissue anastomosis, one end of the lumen tissue is firstly sewed with a purse, then a nail anvil cap is embedded, a small opening is formed in the lumen tissue at the other end, and the circular anastomat is inserted for anastomosis.

However, the problems of the prior art solutions are as follows: the side wall incision needs to be closed after the end-to-end anastomosis is finished, so that the chances of intestinal tract operation trauma and operation pollution are increased, bleeding and foreign body residue are easily caused, the side wall incision is inverted during anastomosis, a gap exists between a mucous membrane layer and the mucous membrane layer, and hidden troubles are buried when the fistula occurs in the postoperative anastomotic stoma.

A circular anastomat is a mechanical digestive tract reconstruction operation tool developed in nearly two thirty years, mainly uses titanium or tantalum metal nails to fix intestinal tissues, compared with the traditional manual suture of needle threads, the anastomat can simplify the operation process, shorten the operation time, enable operations with difficult exposure and small operation space to be simpler and more convenient, is in an inverted anastomosis mode, needs to completely place a nail bin assembly in the intestinal tract during working, applies pressure to enable intestinal serosa at two ends to be attached, then triggers the metal nails to fix soft tissues, cuts off redundant residual ends to form digestive tract reconstruction, is the same as the needle thread suture, needs suture materials in the anastomosis process, and inevitably brings inflammatory reaction to the human body.

The ideal tissue repair is that the tissue defect is completely repaired by cells with the original property, and the original tissue structure and function are restored, namely the tissue defect is completely repaired, so that the modern suture technology emphasizes suturing according to anatomical layers, correctly closing and suturing tissues of the same type, improving the healing quality of wounds, and restoring the original anatomical structure and physiological function of the wounds. The intestinal section tissue is mainly divided into three layers of serous membrane, muscle layer and mucosa from outside to inside, and the layer-by-layer involution suture is the most ideal tissue repair mode, but in the clinical use process, the difficulty degree of implementation and the balance of risk and income need to be considered.

In the existing everting anastomat, for example, in the prior art with the patent number of CN201510282427.X, a nail bin and a nail box are respectively an integer, after suturing, a nail anvil, the nail bin and a cutting knife need to be cut off by scissors, the instrument can be opened, the instrument and an intestinal canal tissue can be separated, and the nail anvil needs to bear the larger striking force generated by impacting and bending a suturing nail and cutting off the intestinal canal tissue by the cutting knife, so that the requirement on the material strength is met, and the method for cutting off the nail anvil and the annular knife of the nail bin is difficult to realize.

In addition, the conventional eversion stapler, for example, the prior art eversion stapler of patent No. CN201410461465.7, has complicated structure of the instrument, complicated operation, inability of one-handed operation, and high requirement for the user, and thus, it is difficult to perform the eversion stapling operation, and it does not have a cutting function, and it is necessary to perform a secondary cutting operation after removing the instrument.

Therefore, an outward-turning annular anastomat is needed to be provided to solve the technical problem that after the end-end anastomosis of the intestinal tract is completed by arranging the working part in the intestinal tract side wall incision, the side wall incision needs to be closed, so that the injury of the intestinal tract operation and the operation pollution risk are increased. The existing inversion anastomat and the existing eversion anastomat need to fix excess tissues of an intestinal canal of a sutured part by adopting a manual purse-string method, have requirements on the proficiency of an operator and consume time. Therefore, a method for fixing the everted intestinal tube without a purse string is yet to be proposed.

Disclosure of Invention

The invention provides an outward-turning type annular anastomat, which at least solves the technical problem that outward-turned tissues in the prior art need to be wrapped and fixed on the outer side of the anastomat.

The invention provides an outward-turning type annular anastomat with a fixing device, which comprises a nail anvil part, a nail bin part and a fixing part, wherein the nail anvil part comprises a left nail anvil and a right nail anvil which can be separated, the left nail anvil and the right nail anvil are connected in a rotating mode, the nail bin part comprises a left nail bin and a right nail bin which can be separated, the left nail bin and the right nail bin are connected in a rotating mode, the fixing part comprises a fixing device for fixing outward-turned tissues on the outer surface of the nail anvil part, a puncture needle is arranged on the fixing device, and the fixing device is fixed on the outer surface of the nail anvil part through the puncture needle.

Optionally, the fixing device includes a fixing clip, a fixing puncture needle and a locking component, the fixing puncture needle is located on the inner surface of the fixing clip, the inner surface of the fixing clip is attached to the outer surface of the nail anvil portion, and the locking component fixes the fixing clip on the outer surface of the nail anvil portion.

Optionally, the fixing devices are semi-ring structures, and the two fixing devices fix the everted tissues on the outer surfaces of the left nail anvil and the right nail anvil respectively.

Optionally, at least two of the fixing puncture needles are arranged on the inner surface of the fixing clip.

Optionally, the locking member is a locking screw.

Optionally, the fixing clip is provided with a fixing hole, the left nail anvil is provided with a threaded hole, and the locking screw penetrates through the fixing hole on the fixing clip and is locked with the threaded hole on the left nail anvil.

Optionally, the fixing device is an integral fixing clip, and the integral fixing clip is provided with an integral fixing puncture needle.

Optionally, the integral retainer retains everted tissue on the outer surface of the anvil portion via the integral retainer spike.

Optionally, the outer surfaces of the left nail anvil and the right nail anvil are provided with sixth holes, and the integrally fixed puncture needle on the integrally fixed clamp is inserted into the sixth holes to fix the integrally fixed clamp on the outer surfaces of the left nail anvil and the right nail anvil.

Optionally, the securing means secures everted tissue to the outer surface of the anvil portion to provide support for severing the tissue.

The annular nail anvil, the nail bin, the nail pusher and the cutting knife are divided into two openable and closable structures, the two parts can be opened after being triggered to separate tissues from an instrument, and the problem that the tissues need to be opened and separated after the outward turning anastomat is sutured is solved.

The invention provides an outward-turning annular anastomat, aiming at the defects in the prior art, the outward-turning annular anastomat is provided, and the outward-turning annular anastomat is required to be opened to separate tissues after being sutured.

According to the technical scheme, a series of parts such as a nail anvil, a nail bin, an annular knife and the like do not need to be cut off, the opening and closing capacity is achieved, the positioning is achieved automatically during anastomosis, the parts surrounding the intestinal canal tissue automatically return to the initial state after anastomosis, all the parts can be opened after the anastomosis process is completed, the instrument and the intestinal canal are separated, the instrument cannot be damaged, and the intestinal canal tissue cannot be damaged. According to the technical scheme, additional purse-string is not needed, the redundant tissue of the intestinal canal does not need to be cut off manually after anastomosis is finished, the anastomosis process can finish the operation of percussion titanium nail suturing and the operation of cutting off the redundant tissue by the semi-ring cutter, and the surgical instrument has the characteristics of low requirement on a user, simplicity and convenience in operation and short operation time.

This creates a problem of how to separate the stapler after suturing, due to the need to suture the intestinal tube externally. The nail bin, the nail box and the cutting knife are separated, the semi-ring cutter in the shape of the outer wall of the nail bin is arranged in the nail bin, the nail bin is an integral body when being triggered, the semi-ring cutter pushes the sewing nail along with the nail pushing piece to complete the operation of cutting off redundant tissues on the outer ring of the intestinal canal when the sewing nail is sewed, and the semi-ring cutter can be opened and closed along with the nail bin. After being fired, the anastomat can be separated into two pieces, and the anastomat and the intestinal canal can be safely separated. Meanwhile, the instrument has the characteristic of simple operation, can be held by one hand for operation, and can be opened by one hand after being fired, so that the operation steps are saved, and the purpose of shortening the operation time is achieved.

Aiming at the method of needing to be pouched in the existing anastomosis operation process, the invention does not need to be pouched, only uses the fixing device to fix the everted intestinal canal, can also achieve the effect of the original manual pounding, and shortens the operation time. Considering the problem that the everted tissues need to be packed and fixed on the outer side of the anastomat, the fixing system is innovatively designed, the everted tissues can be conveniently fixed on the outer wall of the anastomat, and the two problems of separation and tissue fixing after suturing are solved on an instrument. Has the advantages that the everted intestinal canal tissue is directly fixed on the apparatus by the fixing device without being wrapped by a purse; and after the operation is finished, the instrument is convenient to open, the fixing method is easy to realize, and the operability is good.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

FIG. 1 is a schematic view of an alternative eversion ring stapler according to an embodiment of the present invention;

FIG. 2 is a diagrammatic view of an alternative anvil component provided in accordance with an embodiment of the present invention;

FIG. 3-1 is a schematic view of an alternative staple cartridge component provided by an embodiment of the present invention;

FIG. 3-2 is a schematic view of an alternative left staple cartridge component provided in accordance with an embodiment of the present invention;

figure 4 is a schematic view of an alternative eversion fixation device provided by an embodiment of the present invention;

FIG. 5 is a schematic view of an alternative incremental launching firing device provided by embodiments of the present invention;

FIG. 6 is a schematic view of an alternative staple cartridge having a half-ring cutter mounted in a half-ring groove according to an embodiment of the present invention;

figure 7 is a schematic view of an alternative and more convenient valgus fixation device provided by an embodiment of the present invention;

FIG. 8 is a diagrammatic illustration of an alternative anvil and staple cartridge partially guided engagement in accordance with an embodiment of the present invention;

FIG. 9 is a schematic view of an alternative everting stapler firing completion separation provided by an embodiment of the present invention;

FIG. 10 is a schematic view of an alternative attachment of the stationary portion to the anvil portion provided by an embodiment of the present invention;

FIG. 11 is a schematic view of an alternative anvil portion and closure portion attachment provided by embodiments of the present invention;

FIG. 12 is a schematic view of an alternative staple cartridge portion and closure portion attachment provided by embodiments of the present invention;

FIG. 13 is a schematic view of an alternative firing portion attachment provided by embodiments of the present invention;

figure 14-1 is a schematic view of an alternative fixation section adapted to an alternative form of an integral non-separating eversion stapler according to an embodiment of the invention;

figure 14-2 is a schematic view of an alternative fixation section fitting split eversion stapler in accordance with an embodiment of the present invention;

figures 14-3 schematically illustrate an alternative fastening portion adapted to fit other everting staplers, in accordance with an embodiment of the present invention;

FIG. 15 is a schematic view of an alternative anvil rotation and anvil attachment arrangement according to embodiments of the present invention.

Reference numerals:

the nail anvil comprises a nail anvil part 1, a left nail anvil 11, a right nail anvil 12, a nail anvil fixing block 13, a knife anvil 14, a first pin 131, a nail anvil positioning sheet 15, a threaded hole 114, a first groove 132 and a first positioning hole 113;

the nail bin comprises a nail bin part 2, a left nail bin 21, a right nail bin 22, a semi-ring cutter 211, a nail bin fixing block 23, a guide post 24, a nail bin positioning sheet 25, a nail pushing fixing plate 26, a nail pushing bottom plate 27, a nail pushing sheet 210, a second hole 232, a spring 241, an inner hexagonal flat end fastening screw 28, a limiting nut 29 and a second positioning hole 123;

the closing part 3, the rail connector 31, the handle rail 32, the first screw 36, the first hole 321, the third hole 311, the third screw 37, the second spring 361, the pressing plate 33, the handle rail pull rod 34, the locking pin 35, the second screw 38, the third positioning hole 321, and the locking block 362;

a firing portion 4, a firing frame 41, a second pin 46, a fourth hole 411, a fifth hole 412;

a fixing part 5, a fixing clip 51, a fixing hole 512, a fixing puncture needle 52, a locking screw 53, an integral fixing clip 6, an integral fixing puncture needle 61 and a sixth hole 111.

Detailed Description

The principles and spirit of the present invention will be described with reference to a number of exemplary embodiments. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

This embodiment is shown in fig. 1 to 15.

The embodiment of the invention provides an outward-turning annular anastomat, which comprises an anvil part 1 and a nail bin part 2, wherein the anvil part 1 comprises a left anvil 11 and a right anvil 12 which can be separated, as shown in fig. 15, the left anvil 11 is connected with an anvil fixing block 13, the right anvil 12 is connected with the anvil fixing block 13 through a pin 131 and can rotate around the pin 131, the nail bin part 2 comprises a left nail bin 21 and a right nail bin 22 which can be separated, and the left nail bin 21 is connected with the right nail bin 22 in a rotating mode.

Further, the left nail anvil 11, the right nail anvil 12, the left nail bin 21 and the right nail bin 22 are all in a half-ring structure, the left nail anvil 11 and the right nail anvil 12 form an annular nail anvil, and the left nail bin 21 and the right nail bin 22 form an annular nail bin.

Further, the left nail magazine 21 and the right nail magazine 22 respectively include a left half ring groove 213 and a right half ring groove 223, and the left half ring groove 213 and the right half ring groove 223 respectively accommodate therein a half ring cutter 211, as shown in fig. 6.

Further, the magazine portion 2 further includes a staple fixing plate 26, a staple bottom plate 27, and staple sheets 210, wherein the staple fixing plate 26 and the staple bottom plate 27 fix the half-ring cutter 211 and the staple sheets 210 in the left half-ring groove 213 and the right half-ring groove 223, respectively.

Further, the staple fixing plate 26 and the staple base plate 27 are connected by a guide post 24, and the staple fixing plate 26 and the staple base plate 27 can reciprocate along the guide post 24.

Further, the nail anvil part 1 further comprises a nail anvil fixing block 13, the left nail anvil 11 and the right nail anvil 12 are respectively fixed in a groove of the nail anvil fixing block 13, and the left nail anvil 11 and the right nail anvil 12 can rotate in the groove of the nail anvil fixing block 13.

Further, the left anvil 11 and the right anvil 12 are respectively fixed in the groove of the anvil fixing block 13 by a pin 131, and the left anvil 11 and the right anvil 12 can rotate away from each other with the pin 131 as an axis.

Further, the left anvil 11 and the right anvil 12 can rotate away from each other to an angle of 90 degrees around the first pin 131.

Further, the nail anvil portion 1 further comprises a nail anvil positioning plate 15, the nail anvil positioning plate 15 combines the left nail anvil 11 and the right nail anvil 12 to form an annular nail anvil, the nail cartridge portion 2 further comprises a nail cartridge positioning plate 25, and the nail cartridge positioning plate 25 combines the left nail cartridge 21 and the right nail cartridge 22 to form an annular nail cartridge.

Further, the left anvil 11 and the right anvil 12 are in a semi-circular symmetric structure, and the left staple cartridge 21 and the right staple cartridge 22 are in a semi-circular symmetric structure.

The fixing portion 5 includes a fixing device for fixing the tissue turned outside on the outer surface of the anvil portion 1, and the fixing device is provided with a puncture needle and fixed on the outer surface of the anvil portion 1 through the puncture needle.

Further, the fixing device includes a fixing clip 51, a fixing puncture needle 52 and a locking member 53, the fixing puncture needle 52 is located on the inner surface of the fixing clip 51, the inner surface of the fixing clip 51 is attached to the outer surface of the anvil portion 1, and the locking member 53 fixes the fixing clip 51 on the outer surface of the anvil portion 1.

Further, the fixing devices are semi-ring structures, and the two fixing devices fix the everted tissues on the outer surfaces of the left anvil 11 and the right anvil 12 respectively.

Further, at least two fixing puncture needles 52 are provided on the inner surface of the fixing clip 51.

Further, the locking member 53 is a locking screw 53.

Furthermore, the fixing clip 51 is provided with a fixing hole 512, the left anvil 11 is provided with a threaded hole 114, and the locking screw 53 passes through the fixing hole 512 of the fixing clip 51 and is locked with the threaded hole 114 of the left anvil 11.

Further, the fixing means is an integral fixing clip 6, and an integral fixing puncture needle 61 is provided on the integral fixing clip 6.

Further, the above-mentioned integral fixing clip 6 fixes the everted tissue to the outer surface of the above-mentioned anvil portion 1 by the above-mentioned integral fixing puncture needle 61.

Furthermore, the outer surfaces of the left anvil 11 and the right anvil 12 are provided with sixth holes 111, and the integral fixing puncture needle 61 of the integral fixing clip 6 is inserted into the sixth holes 111 to fix the integral fixing clip 6 on the outer surfaces of the left anvil 11 and the right anvil 12.

Further, the above-mentioned fixing means fix the everted tissue on the outer surface of the above-mentioned anvil portion 1, providing support for cutting the tissue.

Specifically, the present invention is directed to a flip-up circular stapler assembly comprising a component 5, such as the anvil portion 1, the cartridge portion 2, the closure portion 3, the firing portion 4 and the stapling portion 5 shown in FIG. 1.

As shown in fig. 1 to 15:

the connection relationship among the five parts is as follows:

the fixing portion 5 is connected to the anvil portion 1, and the screw 53 passes through the hole 512 of the fixing clip 51 and is locked with the threaded hole 114 of the left anvil 11 of the anvil portion 1, so as to complete the fixing, as shown in fig. 10.

The connection relationship between the nail anvil part 1 and the closing part 3 is as follows: the first slot 132 of the anvil fixing block 13 is matched with the guide rail 32 of the closing part 3, and fixed with the hole of the anvil fixing block 13 through the first hole 321 of the guide rail 32 by the first screw 36, as shown in fig. 11.

The connection relationship between the nail bin part 2 and the closing part 3 is as follows: the cartridge fixing block 23 is engaged with the rail connecting member 31 and fixed to the third hole 311 of the rail connecting member 31 by the first screw 36 through the second hole 232 of the cartridge fixing block 23, as shown in fig. 12.

The connection relationship between the firing part 4 and the closing part 3 is as follows: the firing frame 41 is connected to the rail connecting member 31 by a second pin 46, and the second pin 46 is positioned by passing through the fourth hole 411 of the firing frame 41 and the hole of the rail connecting member 31, and is fixed to the fifth hole 412 of the firing frame 41 by passing through the rail connecting member 31 by a third screw 37, as shown in fig. 13.

The distinguishing technical characteristics are an anvil part 1, a nail box part 2 and a fixing part 5.

The above-mentioned anvil portion 1 includes: a left anvil 11, a right anvil 12, an anvil fixing block 13 and a knife anvil 14, as shown in fig. 2.

The above-mentioned anvil portion 1 functions as: the suturing nail is formed to assist the semi-ring cutter to cut off the intestinal canal tissue, and the outward turned intestinal canal tissue is fixed with the fixing clamp part.

The above cartridge section 2 includes: the left nail bin 21, the right nail bin 22, the nail bin fixing block 23, the guide pillar 24, the spring 241, the nail pushing fixing plate 26, the nail pushing bottom plate 27, the limiting nut 29, the nail pushing sheet 210 and the half-ring cutter 211 are shown in fig. 3-1.

The connection of the nail bin part 2 is as follows: the staple and the staple pusher 210 are accommodated in the groove of the left staple cartridge 21, the half-ring cutter 211 is accommodated in the half-ring groove, the half-ring cutter 211 and the staple pusher 210 are fixed between the staple fixing plate 26 and the staple pusher 27, the staple fixing plate 26 and the staple pusher 27 are connected by two guide posts 24, the staple fixing plate 26 and the staple pusher 27 can reciprocate along the guide posts 24, move forward under the force of the handle push rod to complete the firing operation, the spring 241 on the guide post 24 pushes the staple fixing plate 26 to return, and the position is limited by the limit nut 29 at the end of the guide post 24, as shown in fig. 8. The above components are composed of two identical parts, and are respectively installed on the left nail bin 21 and the right nail bin 22, when the left nail bin 21 is opened, the components installed in the left nail bin 21 also move together with the left nail bin 21, as shown in fig. 3-2.

The function of the cartridge section 2 described above: the staple is received, the tissue of the intestine is cut off, and the everted tissue of the intestine is fixed to the fixing portion 5.

In addition, the guidance and automatic retraction functions are embodied as: the externally-turned annular anastomat provided by the embodiment of the invention has an accurate guiding function, when the anastomat is closed, the left nail anvil 11, the right nail anvil 12, the left nail bin 21 and the right nail bin 22 can be accurately aligned, the four guide posts 24 are fixed on the left nail bin 21 and the right nail bin 22 through hexagon socket flat end set screws 28, as shown in fig. 8, when the anastomat is closed, the four guide posts 24 enter the first positioning hole 113 of the left nail anvil 11 and the second positioning hole 123 of the right nail anvil 12 to be positioned. The guide post 24 has a double-side guiding function, and when the trigger is triggered, the trigger fixing plate 26 and the trigger push plate 27 move forward along the guide post 24, and after the trigger action is completed, the trigger fixing plate retracts under the action of the spring 241 of the guide post 24, returns to the tail end of the guide post, and stops after reaching the limit nut 29, as shown in fig. 8.

Separation function: after the percussion is completed, the outwardly-turned annular anastomat provided by the embodiment of the invention has the function of quickly and conveniently separating an instrument from a sutured intestinal canal, the nail anvil positioning piece 15 positioned on the right nail anvil 12 is opened downwards, the nail bin positioning piece 25 positioned on the right nail bin 22 is opened downwards, the left nail anvil 11 and the left nail bin 21 can be rotated upwards by taking the nail anvil positioning block 13 and the nail bin positioning block 23 as axes, the sutured intestinal canal 7 can be separated from the instrument, and the whole operation step is completed, as shown in fig. 9.

The separated nail bin is in an open state as shown in fig. 15, the left nail anvil 11 is fixed in the groove of the nail anvil fixing block 13 by the first pin 131, and can be rotated and opened by 90 degrees by taking the first pin 131 as an axis, in a closed state, the operation of firing a suturing nail to suture can be completed, in an open state, the intestinal canal tissue can be taken out, and the effect of separating the instrument from the intestinal canal tissue can be achieved. The opening and closing mode is simple, and the operation can be completed by one hand without using an external instrument for auxiliary operation.

The above-mentioned closing part 3 includes: as shown in fig. 5, the rail connector 31, the handle rail 32, the pressing plate 33, the handle rail lever 34, the locking pin 35, the second spring 361, and the second screw 38.

The function of the above-mentioned closing part 3: the anvil portion 1 is closed and locked, and the firing portion 4 is connected.

The movement steps of the closing part 3 are as follows: after the intestinal tubes at the two ends are fixed on the anvil portion 1 and the nail magazine portion 2, the pull handle guide rail pull rod 34 moves backwards, the handle guide rail pull rod 34 drives the handle guide rail 32 to move in the groove formed by the handle guide rail connecting piece 31 and the pressing plate 33, the handle guide rail 32 drives the anvil portion 1 to be close to the nail magazine portion 2, and when the third positioning hole 321 of the handle guide rail 32 reaches the position of the locking pin 35, the locking pin 35 enters the positioning hole 321 of the handle guide rail 32 under the action of the second spring 361, so that the anvil portion 1 is positioned. When the opening limit is needed, the second screw 38 located at the lower part of the locking block 362 is pulled to drive the locking pin 35 to move downwards, so that the guide rail 32 moves forwards, and the anvil portion 1 can be disengaged, as shown in fig. 5.

The function of the firing part 4 is shown in figure 1: providing the firing force required to fire the staples.

The above-mentioned fixing portion 5 includes a fixing clip 51, a fixing puncture needle 52 and a locking screw 53 as shown in fig. 5. The locking screw 53 can lock the fixing clip 51 to the outer wall of the anvil 1. When in use, the fixing clip 51 and the fixing puncture needle 52 compress the everted tissue to achieve the function of fixing the tissue without a purse. The cut-off effect of the tissue after the eversion cannot be influenced by the forced contraction during the cut-off.

The above-mentioned fixed part 5 functions: the everted intestinal canal is respectively fixed on the outer surfaces of the nail anvil and the nail bin, and the support is provided for the semi-ring cutter to cut off the intestinal canal.

The fixing portion 5 can be simplified as an integral part as shown in fig. 7, and the fixing can be completed by inserting the integral fixing puncture needle 61 of the integral fixing clip 6 into the sixth holes 111 of the left anvil 11 and the right anvil 12 of the anvil portion 1 by utilizing the ductility of the plastic material.

The above-described realisation of the anchoring device of the anchoring portion 5 on other eversion staplers, as illustrated in figures 14-1, 14-2 and 14-3, is directly applicable in the corresponding position.

While the spirit and principles of the invention have been described with reference to several particular embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in such aspects may not be combined to benefit. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (10)

1. The utility model provides an outwards-turned annular anastomat with fixing device, includes nail anvil part (1), nail storehouse part (2) and static part (5), its characterized in that, nail anvil part (1) is including separable left nail anvil (11) and right nail anvil (12), left nail anvil (11) with right nail anvil (12) rotate to be connected, nail storehouse part (2) are including separable left nail storehouse (21) and right nail storehouse (22), left nail storehouse (21) with right nail storehouse (22) rotate to be connected, static part (5) are including fixing the tissue of turning up the fixing device on nail anvil part (1) surface, the last pjncture needle that is equipped with of static device, static device passes through the pjncture needle is fixed on the surface of nail anvil part (1).

2. The flip-up circular stapler with fastening device according to claim 1, wherein the fastening device comprises a fastening clip (51), a fastening puncture needle (52) and a locking member (53), the fastening puncture needle (52) is located on the inner surface of the fastening clip (51), the inner surface of the fastening clip (51) is attached to the outer surface of the anvil portion (1), and the locking member (53) fixes the fastening clip (51) on the outer surface of the anvil portion (1).

3. The outwardly turned annular stapler with fastening means according to claim 2, characterized in that said fastening means are of semi-ring type, two of which fasten the outwardly turned tissues on the outer surface of the left (11) and right (12) anvil, respectively.

4. The eversion ring stapler with fastening device according to claim 2, wherein at least two of said fastening puncture needles (52) are provided on the inner surface of said fastening clip (51).

5. The external-turn annular stapler with fastening device according to claim 2, characterized in that said locking means (53) are locking screws (53).

6. The out-turned annular anastomat with fixing device according to claim 5, wherein the fixing clip (51) is provided with a fixing hole (512), the left anvil (11) is provided with a threaded hole (114), and the locking screw (53) passes through the fixing hole (512) on the fixing clip (51) and is locked with the threaded hole (114) on the left anvil (11).

7. The eversion ring stapler with a fastening device according to claim 1, wherein the fastening device is a one-piece retainer clip (6), and the one-piece retainer clip (6) is provided with an one-piece retainer puncture needle (61).

8. The out-turned annular stapler with fastening means according to claim 7, characterized in that the integral fastening clip (6) fastens the everted tissue on the outer surface of the anvil portion (1) by means of the integral fastening puncture needle (61).

9. The out-turned annular stapler with fastening device according to claim 8, characterized in that the outer surfaces of the left anvil (11) and the right anvil (12) are provided with a sixth hole (111), the integral fastening puncture needle (61) of the integral fastening clip (6) is inserted into the sixth hole (111) to fasten the integral fastening clip (6) on the outer surfaces of the left anvil (11) and the right anvil (12).

10. The outwardly turned annular stapler with fastening means according to any of the claims 1 to 9, characterized in that said fastening means fasten the outwardly turned tissue on the outer surface of the anvil portion (1) providing support for severing the tissue.

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