CN108095789B

CN108095789B - Degradable anastomosis component and anastomat with same

Info

Publication number: CN108095789B
Application number: CN201810109162.7A
Authority: CN
Inventors: 赵舒
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-02-05
Filing date: 2018-02-05
Publication date: 2023-06-23
Anticipated expiration: 2038-02-05
Also published as: CN108095789A

Abstract

The invention provides a degradable anastomosis component and an anastomat with the same, wherein the degradable anastomosis component is used for anastomosis of a tubular digestive tract between a nail propping seat of the anastomat and a puncture needle bin opposite to the nail propping seat, and the degradable anastomosis component consists of a degradable anastomosis seat piece and a degradable anastomosis fastener. The degradable anastomosis component and the anastomat with the same adopt the anastomosis fastener made of the degradable material, have large anastomosis area and are not easy to fall off, and can form a puncture hole by utilizing the auxiliary puncture nails while anastomosis, so that the anastomosis fastener is not required to be made particularly fine, the strength of the anastomosis fastener is improved, and the anastomosis reliability is improved. Meanwhile, the anastomotic fastener made of the degradable material does not need to be made particularly fine, can be designed into a required structure according to the healing time, has controllable disintegration time and improves the flexibility of structural design.

Description

Degradable anastomosis component and anastomat with same

Technical Field

The present invention relates to surgical instruments for tubular tissue in the human digestive tract, such as the gastrointestinal tract, and more particularly to a degradable anastomosis assembly and an anastomat having the same.

Background

The anastomat is a medical instrument for replacing the traditional manual suture in the surgical operation, wherein the tubular anastomat is widely applied to the operation of human digestive tracts, such as the end-to-end or end-to-side anastomosis operation of esophagus, stomach, duodenum, small intestine and the like in the digestive tracts. In particular, where the interface site of operation is relatively short or the field of view is unclear, it is more desirable to employ a stapler to effect suturing of the wound. In the surgical operations such as digestive tract reconstruction, a titanium nail anastomat is adopted for wound anastomosis, and the surgical operation device has the advantages of simple operation, rapid suture, less complications and the like, and can shorten the operation time and improve the operation efficiency.

Fig. 1-3 show a schematic structural view of a conventional digestive tract anastomat, which comprises a main body 1, wherein the front end of the main body 1 is provided with a spherical crown-shaped nail supporting seat 2, a plane part 21 of the nail supporting seat 2 corresponds to an anastomotic nail bin 3a, and the rear end of the main body 1 is provided with a firing handle 4a, an adjusting knob 5a of the handle and the like. The main working principle of the existing anastomat is similar to that of a stapler, namely, the stapler performs double-row cross-staple stitching on tissues by firing and implanting two rows of mutually staggered staples into the tissues to be stitched through a firing mechanism (not shown) at the rear part of a staple cartridge 3a, the shape of the staples is similar to that of the staples, after firing, the staples deform between the firing mechanism and a staple abutting seat 2, and the staples are bent into a B shape similar to that of the staples, so that the tissues such as gastrointestinal tracts are stitched together. The anastomat of the existing clinically used digestive tract anastomat is made of inert metal nickel titanium tantalum and the like, and after tissue stapling, the titanium alloy anastomat is permanently remained in a body, so that the examination of postoperative X-rays, CT, MRI and the like is affected, and postoperative complications such as scar formation of anastomotic stoma, intestinal lumen stenosis obstruction and the like are easily caused to a certain extent.

In order to overcome the above problems, CN 1742684A discloses a degradable anastomat for human digestive tract tubular tissue and an anastomat thereof, which is a major improvement of the existing anastomat, and is characterized in that: the nail-abutting seat is replaced by an integrally formed anastomotic seat piece made of degradable materials, and the anastomotic nail is replaced by a buckling block made of the degradable materials. The working principle is that a plurality of buckling blocks are triggered to pass through tissues to be sutured through a triggering mechanism, and then each buckling block is tightly matched with a hole on an integrally formed anastomotic seat piece, so that the tissues to be sutured are clamped between the buckling blocks and the anastomotic seat piece; finally, the anastomat is taken out, and the buckling blocks and the anastomotic base piece are all left in the human body and are naturally degraded.

In the prior art, although the degradable material is adopted to overcome the defect that the metal anastomat is left in the human body, the buckling block is tightly matched with the hole on the anastomotic seat piece, the head of the buckling block is in a round blunt shape, a larger wound is formed in the process of penetrating through tissues needing to be sutured, the edge of the wound is in an irregular tearing state, the seat body at the tail end of the buckling block is in a thin stick shape, and the seat body at the tail end of the buckling block is easy to slip from the wound in the tearing state, so that suturing fails. In addition, the buckling block in the prior art replaces the nail supporting seat of the existing anastomat, and the buckling block needs to be installed in the anastomat on site during operation, so that the operation method of the traditional titanium nail tubular anastomat is changed, and operation inadaptation and study difficulty increase are brought to clinicians. And the anastomat made of degradable plastic has limited puncture capability, can not effectively puncture tissues and can not realize anastomosis.

In view of the above-mentioned drawbacks of the prior art, the applicant of the present patent proposes an improved stapler, whose patent publication number is CN 103230289A, the prior art stapler comprises a plurality of staples made of degradable material, and a plurality of caps made of degradable material, the same number as the staples, are matched with the staples, the staples are disposed in the nail holes on the annular surface of the circular staple cartridge facing the staple holder, and the caps are disposed in the cap holes of the planar portion of the staple holder. The anastomat in the prior art adopts the degradable anastomat and the nail cap, so that metal pieces cannot be left in a patient, meanwhile, the tips of the anastomat are tiny, the tissue damage is small, the matching structure of the nail cap and the anastomat is simple and small, and the gastrointestinal tract cannot be blocked.

However, in the prior art proposed by the applicant, since the staples are made of non-metallic degradable materials in the actual use process, in order to improve the piercing capability of the staples, the staples can only be made to be very thin, so that the staples can break through tissues to realize anastomosis, but because the anastomotic area is too small, the anastomosed alimentary canal is easy to separate from the clamping of the staples and the nut after the operation, which results in failure of the operation. And since the staples need to be made relatively thin, their strength is too small, is prone to premature disintegration and does not provide a reliable anastomosis effect prior to the desired healing time. In addition, because the number of the anastomotic nails and the anastomotic caps which are made of degradable materials is too large, the anastomotic nails and the anastomotic caps are troublesome to install and maintain and are easy to lose, precious rescue time can be consumed, and meanwhile, the operation inconvenience is brought to clinicians.

Disclosure of Invention

The present invention is directed to a degradable anastomosis assembly and an anastomat having the same, which can reduce or avoid the above-mentioned problems.

In order to solve the technical problems, the invention provides a degradable anastomosis component which is used for anastomosis of a tubular digestive tract between a nail abutting seat of an anastomat and a puncture needle bin opposite to the nail abutting seat, wherein the degradable anastomosis component consists of a degradable anastomosis seat piece and a degradable anastomosis fastener, and a degradable material adopted by the degradable anastomosis component comprises glycolide, lactide, p-dioxanone, caprolactone and trimethylene carbonate homopolymer or copolymer thereof, wherein the anastomosis seat piece is in an integrally-structured annular shape and is provided with a first face facing the nail abutting seat and a second face facing the anastomosis fastener opposite to the first face; the anastomotic base piece is provided with a first annular body positioned at the periphery and a second annular body positioned at the inner periphery, an annular breakable groove positioned at the first surface is formed between the first annular body and the second annular body, and a plurality of clamping holes uniformly distributed in the annular direction are formed in the first annular body; the anastomotic fastener is in an annular shape with an integral structure and is provided with a third surface facing the puncture needle bin and a fourth surface facing the anastomotic seat piece, wherein the fourth surface is opposite to the third surface; the inner diameter of the anastomotic fastener is larger than the outer diameter of the annular breakable groove, a first central channel which can be used for the second annular body to pass through the annular breakable groove and the nail supporting seat is formed in the inner diameter range of the anastomotic fastener, and buckling needles which are uniformly distributed in the circumferential direction and can be buckled corresponding to the buckling holes are formed on the fourth surface.

Preferably, a puncture hole through which the puncture needle arranged on the puncture needle bin passes is formed in one side of the root part of each snap needle facing the first central channel.

Preferably, a protective fence extending towards the nail supporting seat is formed on the outer side edge of the first annular body, and a plurality of grooves are formed on the side edge of the protective fence in an annular mode.

Preferably, the first torus is provided with a plurality of first convex-concave structures on the second surface along the circumferential direction; the anastomotic fastener is provided with a plurality of second convex-concave structures which are uniformly distributed on the fourth surface along the circumferential direction, and the positions of the first convex-concave structures and the second convex-concave structures are staggered, so that male and female buckling can be formed during anastomosis.

Preferably, the external diameter of the annular frangible groove is larger than the external diameter of the nail propping seat, and the outer diameter of the annular frangible groove is equal to the outer diameter of the annular cutter arranged on the puncture needle bin.

Preferably, the annular frangible groove and the second torus are formed as flat surfaces at corresponding positions of the second face.

Preferably, a second central channel through which the snap spring tube in threaded connection with the nail supporting seat passes is formed in the center of the second annular body, and a notch matched with the protrusion on the snap spring tube is formed in the second central channel.

Preferably, a first protrusion extending toward the latch needle is formed at the distal end of the puncture needle, the first protrusion and the top end of the puncture needle form a first inclined plane, and the lower end of the first protrusion forms an arc surface.

Preferably, a second protrusion extending away from the puncture needle is formed at the tail end of the buckling needle, a second inclined plane is formed between the second protrusion and the top end of the buckling needle, and a buckling surface is formed at the lower end of the second protrusion.

Preferably, the stapler has a guide sleeve; the puncture needle bin can be limited by the guide sleeve to move along the axial direction of the guide sleeve, the puncture needle bin comprises an annular base, the puncture needle is fixedly connected with the annular base, the middle part of the annular base is fixedly connected with an annular cutter, and the lower surface of the annular base is fixedly connected with the guide seat; the lower end of the snap spring tube is provided with an inserting and buckling structure connected with an actuating rod of the anastomat.

The degradable anastomosis component and the anastomat with the same adopt the anastomosis fastener made of the degradable material, have large anastomosis area and are not easy to fall off, and can form a puncture hole by utilizing the auxiliary puncture nails while anastomosis, so that the anastomosis fastener is not required to be made particularly fine, the strength of the anastomosis fastener is improved, and the anastomosis reliability is improved. Meanwhile, the anastomotic fastener made of the degradable material does not need to be made particularly fine, can be designed into a required structure according to the healing time, has controllable disintegration time and improves the flexibility of structural design.

Drawings

The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein, the liquid crystal display device comprises a liquid crystal display device,

FIG. 1 is a schematic view of a conventional stapler;

FIG. 2 is an exploded perspective view of one end of a staple abutment of the stapler of FIG. 1, shown in a bottom view;

FIG. 3 is an exploded perspective view of one end of a staple holder of the stapler of FIG. 1;

FIG. 4 is an exploded perspective view of one end of a stapling seat of a stapler according to one embodiment of the invention;

FIG. 5 shows a schematic cross-sectional view of a snap spring tube;

FIG. 6 shows an exploded perspective view of the lancet cartridge of FIG. 4;

fig. 7 shows an exploded perspective view of a degradable anastomosis assembly in accordance with an embodiment of the present application;

FIG. 8 is a schematic view of a preliminary snap fit of the degradable anastomosis assembly of FIG. 7;

FIG. 9 is a schematic view of the fully engaged configuration of the degradable anastomosis assembly of FIG. 7;

fig. 10 is a schematic view of an anastomosis seat member of a degradable anastomosis assembly according to another embodiment of the present application, showing another configuration not shown in fig. 7-9;

FIG. 11 is a schematic view of an anastomosis fastener of a degradable anastomosis assembly according to yet another embodiment of the present application, showing another configuration not shown in FIGS. 7-9;

fig. 12-14 are schematic cross-sectional views showing the operation steps of a stapler according to an embodiment of the present invention, wherein fig. 12 shows a state before anastomosis, fig. 13 shows a state at anastomosis, and fig. 14 shows a state after anastomosis, respectively.

Description of the embodiments

For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals.

Fig. 4 shows an exploded perspective view of one end of the stapling seat of a stapler according to an embodiment of the invention, i.e. the invention is mainly directed to improvements of the degradable stapling assembly of the stapler and the structures associated therewith, such as the stapling seat, the piercing needle cartridge, etc., while other structures of the stapler may be referred to any one of the existing staplers, such as the one shown in CN 1742684A, or the other structures of the existing staplers as shown in fig. 1-3.

Specifically, the stapler of the present invention comprises a main body 1 (not shown in fig. 4, and understood with reference to fig. 1-3), a crown-shaped abutment seat 2 is provided at the front end of the main body 1, a flat portion 21 of the abutment seat 2 corresponds to the puncture needle cartridge 3, and a firing handle and an adjusting knob (not shown in fig. 4, and understood with reference to fig. 1) of the handle are provided at the rear end of the main body 1. The position of the puncture needle cartridge 3 shown in fig. 4, in the prior art is provided with a staple cartridge, the anastomosis of the present application does not require the use of staples and, therefore, does not require prior art staple cartridges. It will be appreciated by those skilled in the art that the lancet magazine 3 provided herein is primarily intended to provide a puncture needle for assisting in puncturing, and that the puncture needle is not intended for anastomosis, and its function and function are completely different from those of staples, as will be described in further detail below.

Unlike the prior art staplers described above, and in particular as disclosed in fig. 1-3 or CN 1742684A, the stapler of the present invention further comprises a degradable stapling assembly 100 for stapling a tubular alimentary canal disposed between a staple abutment 2 of the stapler and a piercing needle cartridge 3 opposite the staple abutment 2, the degradable stapling assembly 100 being constituted by a degradable stapling seat 10 and a degradable stapling fastener 20.

Further, as shown in fig. 4, the stapler of the present application also has a guiding sleeve 6; the puncture needle cartridge 3 can be limited by the guide sleeve 6 in axial movement along the guide sleeve 6. The lower end of the nail supporting seat 2 is connected with a snap spring pipe 7 in a threaded manner, the lower end of the snap spring pipe 7 is provided with an inserting and buckling structure 71 which can be connected with the actuating rod 5 of the anastomat, as shown in the cross section of fig. 5, a schematic cross section structure of the snap spring pipe 7 is shown. As can be seen from fig. 4, the plugging and buckling structure 71 is an elastically deformable sheet structure formed in the form of a slot at the connection end of the snap spring tube 7, and a protrusion (fig. 5) is formed inside the sheet structure, so that the end of the actuating rod 5 can be conveniently inserted into the lower end of the snap spring tube 7 in a plugging manner through the plugging and buckling structure 71, thereby connecting the nail propping seat 2 and the actuating rod 5 into a whole, so that the actuating rod 5 drives the nail propping seat 2 to move towards the puncture needle bin 3.

Fig. 6 shows an exploded perspective view of the puncture needle cartridge shown in fig. 4, and as shown in fig. 4 and 6, the puncture needle cartridge 3 comprises an annular base 32, a plurality of puncture needles 31 (only two puncture needles 31 are shown in fig. 5 for clarity, one of which is shown in a perspective view, and the other is shown in a cross-sectional view) are fixedly connected to one side of the annular base 32 facing the degradable anastomosis assembly 100, the puncture needles 31 penetrate upward from the lower part of the annular base 32, and the bottom is fixedly connected by screws (not shown in the drawings), so that the upper part of the annular base 32 is visible, and each position corresponding to the puncture needles 31 comprises a flat hole for the puncture needles 31 to penetrate and a round screw hole for the screw connection. The middle part of the annular base 32 is fixedly connected with an annular cutter 9, and the lower surface of the annular base 32 is fixedly connected with a guide seat 33; the guide holder 33 has notches 331 which cooperate with the guide sleeve 6 for catching ribs (not shown) in the guide sleeve 6 through the notches 331, thereby restricting the rotation of the guide holder 33 so that it can move back and forth only in the axial direction of the guide sleeve 6.

Referring now to fig. 7-11, a schematic structural view of a degradable anastomosis assembly of the present application is described in detail, wherein fig. 7 is an exploded perspective view of the degradable anastomosis assembly according to one embodiment of the present application, fig. 8 is a schematic structural view of a preliminary snap-fit of the degradable anastomosis assembly of fig. 7, fig. 9 is a schematic structural view of a complete snap-fit of the degradable anastomosis assembly of fig. 7, and fig. 10 is a schematic structural view of an anastomosis seat of the degradable anastomosis assembly according to another embodiment of the present application, and another structure not shown in fig. 7-9 is shown; fig. 11 is a schematic view of an anastomosis fastener of a degradable anastomosis assembly according to yet another embodiment of the present application, showing another configuration not shown in fig. 7-9.

As shown in detail in fig. 7-11, anastomosis seat member 10 is in the form of a ring of unitary construction having a first face facing abutment seat 2 and a second face facing anastomosis fastener 20 opposite the first face; the anastomotic stoma fitting 10 comprises a first annular ring body 11 positioned on the outer periphery and a second annular ring body 12 positioned on the inner periphery, an annular frangible groove 13 positioned on the first surface is formed between the first annular ring body 11 and the second annular ring body 12, and a plurality of buckling holes 14 uniformly distributed in the annular direction are formed in the first annular ring body 11.

Correspondingly, the anastomotic fastener 20 is also in the shape of an annular ring with an integral structure and is provided with a third surface facing the puncture needle bin 3 and a fourth surface facing the anastomotic seat member 10 opposite to the third surface; the inner diameter of the anastomotic fastener 20 is larger than the outer diameter of the annular frangible groove 13, a first central channel 27 which can be penetrated by the second annular body 12, the annular frangible groove 13 and the nail supporting seat 2 is formed in the inner diameter range of the anastomotic fastener 20, and the fourth surface is provided with buckling needles 24 which are uniformly distributed in the circumferential direction and can be buckled corresponding to the buckling holes 14.

The root of each snap needle 24 is provided with a puncture hole 21 for a puncture needle 31 arranged on the puncture needle cartridge 3 to pass through on the side facing the first central channel 27, so that a hole is first pierced on the intestinal canal by the puncture needle 31 during anastomosis, and the snap needle 24 is assisted to penetrate the intestinal canal from the hole.

The outer edge of the first torus 11 is formed with a protective rail 15 extending facing the nail holder 2, and the side edge of the protective rail 15 is formed with a plurality of grooves 16 in a ring shape. The protective fence 15 has the function of isolating the intestinal canal from the puncture needle 31, and prevents the intestinal canal from being damaged by the puncture needle 31 penetrating out of the puncture hole 21 of the anastomotic base member 10 when the intestinal canal is contracted inwards. The grooves 16 have the effect of reducing the mass of the anastomotic seat 10 and forming degraded fragments of controlled size, for controlling the degradation rate and size of the anastomotic seat 10.

The first torus 11 is provided with a plurality of first convex-concave structures on the second surface along the circumferential direction; the anastomosis fastener 20 is provided with a plurality of second convex-concave structures uniformly distributed on the fourth surface along the circumferential direction, and the positions of the first convex-concave structures and the second convex-concave structures are staggered mutually, so that male-female buckling can be formed during anastomosis. The female and male engagement can form a larger engagement force to prevent the middle tissue from sliding off after anastomosis, and the staggered convex-concave structure can prevent the anastomosis seat member 10 and the anastomosis fastener 20 from being dislocated in the circumferential direction, so that the buckling needle 24 is prevented from being broken due to the dislocating.

The outer diameter of the annular breakable groove 13 is larger than that of the nail propping seat 2, and the outer diameter of the annular breakable groove 13 is equal to that of the annular cutter 9 arranged on the puncture needle bin 3. Through setting up annular frangible groove 13, can be so that annular cutter 9 cut off it in the position of annular frangible groove 13, annular frangible groove 13 after cutting off breaks away from first ring body 11 together with inboard second ring body 12, and annular cutter 9 just in time can with support nail seat 2 with annular frangible groove 13 and the second ring body 12 centre gripping of cutting off, of course, still have unnecessary intestines pipe of cutting off simultaneously, all can be through annular cutter 9 and support nail seat 2 centre gripping together through first ring body 11 and coincide fastener 20 first central channel 27 and withdraw from intestines pipe, avoided prior art need the trouble of taking off support nail seat 2 alone, the operating efficiency has been improved, patient's misery has been reduced.

The annular frangible groove 13 and the second torus 12 are formed to be planar at corresponding positions of the second face. When being convenient for support nail seat 2 to support like this, support nail seat 2 through the plane with the both sides of annular frangible groove 13 and withhold, when annular cutter 9 and support nail seat 2 cooperation cut off annular frangible groove 13, the weak part in annular frangible groove 13 has formed overhead structure, therefore just cuts off annular frangible groove 13 through less dynamics, is favorable to the completion smoothly of operation, has reduced operator's the operation degree of difficulty.

The center of the second torus 12 is provided with a second center channel 17 through which the snap spring tube 7 in threaded connection with the nail propping seat 2 passes, and the second center channel 17 is provided with a notch 18 matched with a protrusion 78 on the snap spring tube 7 for fixing the nail propping seat 3 through the matching of the protrusion 78 and the notch 18 and preventing the nail propping seat 3 from rotating around the axis.

The structure of the puncture needle 31 will be described in detail with reference to fig. 4. As shown in fig. 4, the tip of the puncture needle 31 is formed with a first projection 311 projecting toward the snap needle 24, the first projection 311 forms a first inclined plane 312 with the tip of the puncture needle 31, and the lower end of the first projection 311 forms an arc surface 313. The first protrusion 311 is used for hiding the snap needle 24 below the arc surface 313 by the first protrusion 311 after the puncture needle 31 passes through the puncture hole 21 (the matched state of the puncture needle 31 and the snap needle 24 can be seen in fig. 12-14), so that two different holes are prevented from being formed on the puncture needle 31 and the snap needle 24, and the intestinal canal is pricked and the anastomosis operation can not be completed. In addition, the first inclined plane 312 can form a better piercing effect, and the arc surface 313 formed at the lower end of the first protrusion 311 can facilitate the smooth movement of the snap needle 24 along the arc surface 313 to avoid jamming when the puncture needle 31 is withdrawn after anastomosis.

The structure of the snap pin 24 will be described in detail with reference to fig. 7. In another embodiment, as shown in fig. 7, the end of the latch needle 24 is formed with a second protrusion 241 extending away from the puncture needle 31, the second protrusion 241 and the top end of the latch needle 24 form a second inclined plane 242, and the lower end of the second protrusion 241 forms a latch surface 243. The second protrusion 241 at the end of the latch needle 24 is mainly used for forming a latch action with the latch hole 14 through the latch surface 243, and the second inclined plane 242 forms a sharpening structure on one hand so that the second inclined plane can smoothly pass through the hole formed by the puncture needle 31 on the intestinal canal, and on the other hand, the sharpening structure reduces the contact area between the end of the second protrusion and the arc surface 313 of the puncture needle 31, so that the friction force of the puncture needle 31 during withdrawal is reduced. The latch surface 243, however, cannot be designed as a cambered surface, preferably perpendicular to the plane of the latch needle 24, in order to achieve a secure latch.

In one particular embodiment, the degradable material employed in the degradable anastomosis assembly 100 of the present invention may comprise homopolymers of glycolide, lactide, p-dioxanone, caprolactone, trimethylene carbonate, or copolymers thereof.

The above schematically illustrates the concept of the present invention, that is, the present invention is mainly to improve the degradable anastomosis assembly 100 of the anastomat, after improving the degradable anastomosis assembly 100, the original staple cartridge is correspondingly replaced, and instead, the puncture needle cartridge 3 of the present application, so as to facilitate the smooth withdrawal of the staple supporting seat 2, the diameter of the staple supporting seat 2 may be slightly reduced. In addition, other structures of the anastomat can refer to any existing anastomat, and the implementation of the anastomat of the invention is the same, so that the structure of the existing anastomat is changed slightly, and the existing anastomat is not required to be redesigned. For example, the present invention only requires the provision of a new needle magazine 3, the abutment 2 only requires the use of a smaller diameter member, and no modification of the profile is required. The degradable anastomosis assembly 100 of the invention can be matched with an anastomosis operation easily, an operator does not need to change the original operation habit, and the difficulty of adapting and learning of the operator is greatly reduced.

The operation of the stapler and the method of use of the present invention will now be described in detail with reference to figures 12 to 14. The technical features and advantages of the present invention may be more readily understood by one skilled in the art with reference to the accompanying drawings. In this case, only the cross-sectional view of the structure of fig. 4 except for the actuator lever 5 is shown for clarity.

As shown in fig. 12, before performing the gastrointestinal tract operation, the abutment and the anastomosis seat member are first assembled together in advance, and the planar portion 21 of the abutment 2 is brought into abutment with the first face of the anastomosis seat member 10. The anastomotic fastener 20 is previously assembled at the top end of the puncture needle holder 3, and the third surface of the anastomotic fastener is attached to the top end of the puncture needle holder 3.

The combination of the nail-abutting seat 2 and the anastomotic seat piece 10 is buried in a side lumen and is bound and fastened outside by a frontal line. The anastomat body is inserted from the other side of the lumen and is also bound and fastened outside by a frontal line. The clamp spring tube 7 of the nail propping seat 2 is inserted and clamped with the actuating rod 5 of the main body 1, and the tail knob is adjusted to enable the nail propping seat 2 to move under the drive of the actuating rod 5 to prepare for closing and clamping tissues, as shown in fig. 12, which shows a schematic diagram of the state before anastomosis operation.

Fig. 13 shows a schematic view of the structure during an anastomosis operation. After the tissue is closed and clamped by the nail abutting seat 2 and the puncture needle bin 3, the puncture needle 31 and the annular cutter 9 are pushed out towards the nail abutting seat 2 together, then the puncture needle 31 penetrates through the puncture hole 21 of the anastomotic fastener 20 to puncture the two layers of clamped intestinal canal, and the annular cutter 9 also moves forwards continuously. The clip 24 pierces the intestinal wall tissue together with the piercing needle 31 to the first face of the anastomosis seat member 10; meanwhile, the annular cutter 9 pushes the intestinal wall tissue clamped in the inner cavity of the anastomat and the annular breakable groove 13 of the anastomotic base piece 10 against the edge of the nail pushing base 2, and cuts off the intestinal wall tissue, the annular breakable groove 13 and the second annular body 12 at the inner side of the annular breakable groove.

Finally, the retracting process after anastomosis is performed, as shown in fig. 14. The actuating rod 5 withdraws to drive the nail supporting seat 2, the cut second annular body 12, the annular breakable slot 13, the annular cutter 9, the puncture needle 13 and the like to withdraw from the intestinal canal; the abutment 2 has a smaller radius than the first central passage 27 of the anastomotic fastener 20 and can therefore be successfully withdrawn. The final anastomosis seat member 10 and the anastomosis fastener 20 are clamped at the outer side of the clamping hole 14 through the clamping surface 243 of the clamping pin 24, so as to realize tight buckling; the second torus 12 and the annular frangible groove 13 leave a hollow cavity after being cut by the annular cutter 9 to facilitate the flow of intestinal contents.

It should be understood by those skilled in the art that while the present invention has been described in terms of several embodiments, not every embodiment contains only one independent technical solution. The description is given for clearness of understanding only, and those skilled in the art will understand the description as a whole and will recognize that the technical solutions described in the various embodiments may be combined with one another to understand the scope of the present invention.

The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent alterations, modifications and combinations thereof will be effected by those skilled in the art without departing from the spirit and principles of this invention, and it is intended to be within the scope of the invention.

Claims

1. A degradable anastomosis component used for anastomosis of a tubular digestive tract between a nail abutting seat (2) of an anastomat and a puncture needle bin (3) opposite to the nail abutting seat (2), wherein the degradable anastomosis component (100) is composed of a degradable anastomosis seat piece (10) and a degradable anastomosis fastener (20), and the degradable material adopted by the degradable anastomosis component (100) comprises glycolide, lactide, p-dioxanone, caprolactone, trimethylene carbonate homopolymer or copolymer thereof,

the anastomotic base piece (10) is in a ring shape with an integral structure and is provided with a first surface facing the nail abutting base (2) and a second surface facing the anastomotic fastener (20) opposite to the first surface; the anastomotic base piece (10) is provided with a first annular body (11) positioned at the outer periphery and a second annular body (12) positioned at the inner periphery, an annular breakable groove (13) positioned at the first surface is formed between the first annular body (11) and the second annular body (12), and a plurality of clamping holes (14) uniformly distributed in the circumferential direction are formed in the first annular body (11);

the anastomotic fastener (20) is in a circular ring shape with an integrated structure, having a third face facing the needle magazine (3) and a fourth face facing the anastomosis seat (10) opposite to the third face; the inner diameter of the anastomotic fastener (20) is larger than the outer diameter of the annular breakable groove (13), a first central channel (27) which can be penetrated by the second annular ring body (12), the annular breakable groove (13) and the nail supporting seat (2) is formed in the inner diameter range of the anastomotic fastener (20), and buckling needles (24) which are uniformly distributed in a circumferential direction and can be buckled corresponding to the buckling holes (14) are formed on the fourth surface;

the root of each buckling needle (24) faces the first central channel (27) and is provided with a puncture hole (21) for a puncture needle (31) arranged on the puncture needle bin (3) to pass through;

the outer side edge of the first annular body (11) is provided with a protection fence (15) extending towards the nail supporting seat (2), and the side edge of the protection fence (15) is annularly provided with a plurality of grooves (16);

the outer diameter of the annular breakable groove (13) is larger than the outer diameter of the nail propping seat (2), and the outer diameter of the annular breakable groove (13) is equal to the outer diameter of an annular cutter (9) arranged on the puncture needle bin (3);

a first bulge (311) extending towards the buckling needle (24) is formed at the tail end of the puncture needle (31), a first inclined plane (312) is formed between the first bulge (311) and the top end of the puncture needle (31), and an arc-shaped surface (313) is formed at the lower end of the first bulge (311);

the tail end of the buckling needle (24) is provided with a second bulge (241) which extends out of the puncture needle (31), the second bulge (241) and the top end of the buckling needle (24) form a second inclined plane (242), and the lower end of the second bulge (241) forms a buckling surface (243).

2. The degradable anastomosis assembly according to claim 1, wherein the first torus (11) has a plurality of first convex-concave structures uniformly distributed circumferentially on the second face; the anastomotic fastener (20) is provided with a plurality of second convex-concave structures which are uniformly distributed on the fourth surface along the circumferential direction, and the positions of the first convex-concave structures and the second convex-concave structures are staggered, so that male and female buckling can be formed during anastomosis.

3. The degradable anastomosis assembly according to claim 1, wherein the annular frangible groove (13) and the second torus (12) are formed as planar surfaces at corresponding positions of the second face.

4. The degradable anastomosis assembly according to claim 1, characterized in that the second torus (12) is formed at its centre with a second central channel (17) through which a circlip tube (7) screwed with the nailing seat (2) passes, the second central channel (17) being formed with a recess (18) cooperating with a projection (78) on the circlip tube (7).

5. A stapler with a degradable anastomosis assembly according to claim 4, characterized in that it has a guiding sleeve (6); the puncture needle bin (3) can be limited by the guide sleeve (6) to move along the axial direction of the guide sleeve (6), the puncture needle bin (3) comprises an annular base (32), the puncture needle (31) is fixedly connected with the annular base (32), the middle part of the annular base (32) is fixedly connected with an annular cutter (9), and the lower surface of the annular base (32) is fixedly connected with a guide seat (33); the lower end of the snap spring tube (7) is provided with an inserting and buckling structure (71) connected with an actuating rod (5) of the anastomat.