CN112451017B

CN112451017B - Pancreas intestine anastomat

Info

Publication number: CN112451017B
Application number: CN202011337559.5A
Authority: CN
Inventors: 顾闻
Original assignee: Zhejiang Haichuang Medical Device Co ltd
Current assignee: Zhejiang Haichuang Medical Device Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2022-02-18
Anticipated expiration: 2040-11-25
Also published as: CN112451017A

Abstract

The invention aims to provide a pancreas and intestine anastomat capable of draining pancreatic juice, which comprises a catheter divided into a pancreas inner area, an intestine inner area and a body outer area, a winding fixing device arranged at the junction of the pancreas inner area and the intestine inner area, and a catheter limiting device arranged at the junction of the intestine inner area and the body outer area, wherein drainage holes are formed in the pancreas inner area; the winding fixing device comprises a fixing sleeve and a winding lug, the fixing sleeve is sleeved on the guide pipe, one end of the winding lug is fixed on the fixing sleeve, and the other end of the winding lug is a free end; the catheter limiting device comprises a fixed ring fixedly sleeved on the catheter, a movable ring movably sleeved on the catheter and a folding piece for connecting the movable ring and the fixed ring, wherein the movable ring is positioned at one end far away from the intestinal region, and folding grooves are formed in the two ends and the middle of the folding piece; when the movable ring is close to the fixed ring, the folding piece is bent at the folding groove, so that the middle position of the folding piece is bent towards the direction far away from the axis of the fixed ring; the winding fixing device and the catheter limiting device are both made of medical absorbable materials; the structure of the invention can guide pancreatic juice and is convenient to dismantle as soon as possible.

Description

Pancreas intestine anastomat

Technical Field

The invention relates to a medical instrument, in particular to a pancreatico-intestinal anastomat.

Background

After the pancreatectomy is performed, a pancreaticotomy anastomosis operation is also needed to enable pancreatic juice to flow into the small intestine again, and the operation needs to cut a small hole on the intestinal wall, then sew the intestinal wall, the pancreatic section and the pancreatic duct cut end together, seal the pancreatic section and reconstruct a pancreatic and intestinal anastomosis opening. The problem in the prior art is that the pancreatic juice is corrosive, when the pancreatico-intestinal anastomotic stoma is not healed, the healing time is prolonged due to the contact of the pancreatico-intestinal anastomotic stoma with the pancreatic juice, and the anastomotic stoma is difficult to heal due to the formation of a fistula or edema, so the pancreatic juice is preferably led out of the body before the pancreatico-intestinal anastomotic stoma is healed. The prior art does not have a device specially aiming at the requirement, and pancreatic juice generally naturally flows out of a pancreatic duct and enters the small intestine.

Disclosure of Invention

The invention aims to provide a pancreaticojejunostomy device capable of draining pancreatic juice.

The technical purpose of the invention is realized by the following technical scheme:

a pancreas intestine anastomat comprises a catheter, wherein a drainage hole is formed in the wall of the catheter, and the pancreas intestine anastomat further comprises a winding fixing device and a catheter limiting device which are fixedly arranged on the outer wall of the catheter; the winding fixing device comprises a circular tube-shaped fixing sleeve and a winding lug, the fixing sleeve is sleeved on the guide tube, one end of the winding lug, close to the pancreatic inner area, is fixedly arranged on the outer circumferential surface of the fixing sleeve, and the other end of the winding lug is a free end; the catheter limiting device comprises a fixed ring, a movable ring and a folding piece for connecting the movable ring and the fixed ring, the fixed ring is sleeved on the catheter and is fixed with the catheter, the movable ring is sleeved on the catheter and can move along the axial direction of the catheter, the movable ring is positioned at one end of the fixed ring, which is far away from the intestinal region, and folding grooves are respectively arranged at two ends of the folding piece and in the middle position of the folding piece in the length direction; when the movable ring is close to the fixed ring, the folding piece is bent at the folding groove, and the middle position of the folding piece is bent towards the direction far away from the axis of the fixed ring; the winding fixing device and the catheter limiting device are both made of medical absorbable materials.

Preferably, the surface of the winding lug is provided with a fixing groove, and the fixing groove surrounds the root of the winding lug for a circle.

Preferably, the specific surface area of the fixing sleeve is smaller than that of the winding lug.

Preferably, one end of the peripheral surface of the fixing sleeve, which faces away from the inner area of the intestine, is a circular table, and the end with the smaller diameter of the circular table is positioned at the end part.

Preferably, the outer surface of the fixing sleeve is provided with an anti-skid groove.

Preferably, the folding piece is in a strip shape and is arranged along the axial direction of the fixed ring, and the folding piece is provided with a plurality of circles which are uniformly distributed by taking the axis of the fixed ring as the center.

Preferably, the fold groove is located on an outward surface of the fold.

Preferably, the end of the stationary ring facing the pancreatic inner region is provided with a conical structure.

Preferably, the conduit is rounded at the end located within the pancreatic inner region.

Preferably, the device further comprises an extracorporeal fixing device detachably and fixedly connected with the catheter, and the extracorporeal fixing device is arranged on the extracorporeal area.

Preferably, the fixed ring and/or the upper part is provided with an absorption groove.

Preferably, the fixed ring is provided with an anti-rotation groove, and the anti-rotation groove is a long groove with the length arranged along the generatrix of the fixed ring.

The invention has the following beneficial effects:

the invention relates to a pancreas intestine anastomat, which comprises a catheter for drainage, a winding fixing device and a catheter limiting device, wherein the winding fixing device comprises a round-tube-shaped fixing sleeve and a winding lug with one end fixed and the other end free; the catheter limiting device comprises a fixed ring and a movable ring which are sleeved on the catheter and a folding piece which is connected with the movable ring and the fixed ring, the fixed ring is fixedly connected with the catheter, the movable ring can move along the axial direction of the catheter, the movable ring is positioned at one end, far away from the intestinal region, of the fixed ring, when the catheter limiting device enters the small intestine, the catheter is pulled, the fixed ring can be drawn towards the movable ring under the action of natural bending of the folding piece, and the folding piece expands in the axial direction, so that the anastomat cannot move outwards, the position of the anastomat is limited, the catheter is further pulled, one end of the catheter is pulled out from the body, the small intestine can be drawn towards the abdominal wall under the pulling action of the catheter limiting device, the catheter is further fixed in the body by using the catheter fixing device, the positions of pancreas, the small intestine and the abdominal wall are relatively stable, and pancreatic juice is collected by the drainage tube and then is discharged out of the body through the other end of the catheter of the anastomat. The winding fixing device and the catheter limiting device are made of medical absorbable materials, after the pancreatico-intestinal anastomotic stoma is healed, the winding fixing device and the catheter limiting device can be partially absorbed, so that a suture line is separated from the catheter, the limiting is invalid, the catheter is pulled outwards at the moment, the anastomat can be detached, and the catheter is quite convenient to detach.

Drawings

FIG. 1 is a schematic structural view of an embodiment of the pancreaticojejunostomy of the present invention with the catheter retention device unexpanded;

FIG. 2 is a schematic structural view of an embodiment of a winding fixture according to the present invention;

FIG. 3 is a schematic view of the catheter fixing device of the present invention, wherein the catheter fixing device is in an initial state;

FIG. 4 is a schematic view of the catheter fixing device of the present invention, wherein the catheter fixing device is in a limiting state;

FIG. 5 is a schematic view of the position of the pancreaticojejunostomy device in use with a body organ.

The description of the reference numerals,

10. a conduit; 11. an pancreatic inner region; 12. the intestinal compartment; 13. an extracorporeal region; 14. a drainage hole;

20. a winding fixing device; 21. fixing a sleeve; 22. a wire winding lug; 23. fixing grooves; 24. an anti-slip groove; 25. a yielding groove;

30. a catheter limiting device; 31. fixing a ring; 32. a moving ring; 33. folding the piece; 34. folding the groove; 35. an anti-rotation slot;

40. an extracorporeal fixation device; 50. a pancreas; 60. the small intestine; 70. the abdominal wall.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals.

A pancreaticojejunostomy device, as shown in figure 1, comprises a catheter 10 for leading pancreatic juice out, a winding fixing device 20 for fixing the relative position of the anastomat and the pancreaticojejunostomy, and a catheter limiting device 30 for limiting the movement of the catheter 10 to the outside of a human body. One end of the catheter 10 penetrates through the abdominal wall 70 and the small intestine 60 and is inserted into the pancreatic duct, and the other end is positioned outside the abdominal wall 70, and the catheter 10 is used for communicating the pancreatic duct and leading pancreatic juice out of the body. Referring to fig. 1 and 5, the catheter 10 is an elongated tube, which is divided into a pancreatic inner region 11, an intestinal region 12 and an extracorporeal region 13 in the longitudinal direction thereof, wherein the extracorporeal region 13 is mainly located outside the human body, the intestinal region 12 is located in the small intestine 60, and the pancreatic inner region 11 is located in the pancreatic duct. The tube wall of the duct 10 of the pancreas inner area 11 is provided with drainage holes 14 which are communicated with the inside and the outside of the duct 10, and pancreatic juice in the pancreas enters the duct 10 through the drainage holes 14. The end of the catheter 10 in the pancreatic inner region 11 is rounded to avoid injury to the pancreatic duct by the sharp tip of the catheter 10 when inserted into the pancreatic duct. The pancreatico-enterostomy instrument of the invention is provided with a plurality of specifications, the diameters of the anastomat catheters 10 with different specifications are different, and the specification that the diameter of the catheter 10 is matched with the thickness of the pancreatic duct of a patient can be selected when the pancreatico-enterostomy instrument is used.

As shown in fig. 2, the winding fixture 20 includes a fixing sleeve 21 and a winding lug 22. The fixing sleeve 21 is a circular tube, the inner wall of the fixing sleeve 21 is matched with the outer wall of the catheter 10 and is fixedly sleeved at the junction of the pancreatic inner area 11 and the intestinal area 12 of the catheter, and when the catheter is used, one end, located at the pancreatic inner area 11, of the fixing sleeve 21 is used for plugging a gap between a pancreatic duct and the catheter 10 and preventing pancreatic juice from flowing out of the gap between the pancreatic duct and the catheter 10. The winding lug 22 is arranged along the direction of the tube center line of the fixing sleeve and is fixedly arranged on the outer circumferential surface of the fixing sleeve 21, wherein one end of the winding lug 22 close to the pancreas inner region 11 is connected with the fixing sleeve 21, and the other end is a free end. When the device is used, one end of the catheter penetrates through the abdominal wall 70 and the small intestine 60 to enable the pancreatic inner area of the catheter to be inserted into the pancreatic duct, the fixing sleeve blocks a gap between the pancreatic duct and the catheter, the suture thread is adopted to suture the intestinal wall, the pancreatic 50 section and the pancreatic duct fracture, and the suture thread for suturing the intestinal wall, the pancreatic 50 section and the pancreatic duct fracture is wound at the joint of the wire winding lug 22 and the fixing sleeve 21, namely the root of the wire winding lug 22 to enable the pancreatic intestine anastomotic stoma and the anastomat to be relatively fixed, so that the pancreatic juice is prevented from leaking out when the wire winding fixing device 20 moves before the healing of the pancreatic intestine anastomotic stoma, and the wire winding lug 22 with one end being opened and one end being connected is convenient to wind the suture thread in an operation. The winding fixing device 20 is made of medical absorbable materials, such as polylactic acid, polyvinyl alcohol, polydioxanone and the like, the winding fixing device 20 is gradually absorbed by a human body after an operation, and in practical use, the absorption time of the winding fixing device 20 can be set according to the recovery speed of the human body, so that the absorption time of the winding fixing device 20 by the human body is slightly later than the healing time of the pancreaticotomy anastomotic stoma, and thus, a suture line can be separated from the catheter 10 after the pancreaticotomy anastomotic stoma is healed, and the anastomat can be dismantled. Therefore, when the anastomat is dismantled, only the pancreatico-intestinal anastomotic stoma is healed, the pancreatic juice can not overflow, the operation line is not required to be completely absorbed, the joint of the pancreatic section and the intestinal wall is not required to be healed, the time for dismantling the catheter of the anastomat can be greatly advanced, and the pancreatic juice can return to the human body as soon as possible.

Preferably, the specific surface area of the pouch 21 is smaller than that of the winding lug 22, so that the winding lug 22 absorbs faster than the pouch 21, the winding lug 22 will preferentially be absorbed,the suture is separated from the catheter before the fixing sleeve 21 is completely absorbed, the catheter can be detached without the constraint of the suture, the degree of absorption and deformation of the fixing sleeve 21 is relatively small, the influence on the blocking capacity of the fixing sleeve 21 is relatively small, and the requirements that the anastomat needs to be kept stable before the healing of the pancreatico anastomotic stoma and can be rapidly detached after the healing can be better met. Preferably, the fixing groove 23 is formed on the surface of the root of the winding lug 22, the fixing groove 23 surrounds the root of the winding lug 22 for a circle, the fixing groove 23 can restrain the suture to improve the stability of the suture, the material of the root of the winding lug 22 can be reduced, the root of the winding lug 22 can be absorbed before the winding lug body, the winding lug falls off, the connection relation between the suture and the winding fixing device 20 can be changed from a stable connection state to a disconnection state along with the falling of the winding lug 22, therefore, the suture does not need to wait for the winding lug 22 to be completely absorbed, and the deformation of the fixing sleeve 21 is smaller when the suture falls off. Only one end of the anastomat and the human body fixing winding lug 22 is fixedly connected with the fixing sleeve 21 by winding the suture on the winding lug 22, so that a designer can conveniently determine the thickness of the material at the connection part according to the relation between the healing speed of the human body wound and the absorption speed of the material, for example, when the materials such as polylactic acid, polyvinyl alcohol, polydioxanone and the like are adopted, the cross section area of the connection part of the winding lug 22 and the fixing sleeve can be set to be 0.2mm²～1mm²In the meantime. The winding lug 22 is preferably arranged to be a long strip-shaped structure, the length direction of the long strip-shaped structure is parallel to the axis of the fixing sleeve 21, the long strip-shaped structure can enable the winding lug 22 to have a relatively large volume and a relatively small root, and the large winding lug 22 is more convenient for a doctor to observe and operate in the operation process on the premise that the time required for falling off of the winding lug 22 is not prolonged; the resistance of the strip-shaped winding lug 22 when entering the human body is relatively small; additionally, the longer winding ears 22 also reduce the likelihood of the suture falling off of the winding ears 22. Preferably, a plurality of anti-slip grooves 24 are arranged on the outer surface of the fixing sleeve 21 along the circumferential direction of the fixing sleeve 21, the anti-slip grooves 24 are axially arranged along the fixing sleeve 21, and the anti-slip grooves 24 can increase the resistance between the fixing sleeve 21 and the surrounding human tissues when the fixing sleeve 21 axially moves, thereby being beneficial to improving the winding capacity during the operation and the wound healingThe stability of the fixing means 20, in addition to accelerating the absorption of the fixing sleeve 21. Preferably, the retaining sleeve 21 is provided with a relief groove 25 opposite the winding lug 22, which allows a larger space for the suture thread, which facilitates the exposure of the winding lug 22 to the human body and improves the material absorption efficiency. The outer wall of the end part of the fixing sleeve 21 for plugging the pancreatic duct is preferably set to be a circular table surface, wherein the end with smaller diameter of the circular table surface faces outwards, so that part of the circular table surface can enter the pancreatic duct and be attached to the inner wall of the pancreatic duct when a gap between the pancreatic duct and the catheter is plugged, the contact area between the fixing sleeve 21 and the inner wall of the pancreatic duct is increased, the plugging effect of the fixing sleeve is improved, and the possibility of pancreatic juice outflow is reduced; in addition, the resistance is less when the round platform structure enters human tissues. Preferably, the external wall of the sheath 21 close to the enteral zone 12 is also provided as a circular table with the smaller diameter end facing outwards, which can serve as a guide when the stapler is removed, helping to reduce the resistance of the sheath 21 when it passes through the intestinal wall and the abdominal wall 70.

As shown in fig. 3 and 4, the catheter limiting device 30 is disposed at a junction between the intestinal region 12 and the extracorporeal region 13, the catheter limiting device 30 includes a fixed ring 31, a movable ring 32 and a folding member 33, the fixed ring 31 is sleeved on the catheter 10 and fixed with the catheter 10, the movable ring 32 is sleeved on the catheter 10 and can move axially along the catheter 10, wherein the fixed ring 31 is disposed adjacent to the winding fixing device 20, the folding member 33 is in a strip shape and disposed axially along the fixed ring, the folding member 33 is disposed between the fixed ring 31 and the movable ring 32, and two ends of the folding member are respectively connected to the fixed ring 31 and the movable ring 32. The folding piece 33 is provided with folding grooves 34 at both ends and in the middle. After the catheter limiting device 30 enters the small intestine in an initial state that the folding piece 33 is straightened, the catheter 10 is pulled to enable the movable ring 32 to abut against the intestinal wall, the catheter is continuously pulled, the fixed ring 31 and the movable ring 32 are mutually closed, the folding piece is naturally bent and expanded in the axial direction to enter a limiting state, and the catheter limiting device 30 in the limiting state cannot pass through an opening in the human body, through which the catheter limiting device 30 enters, so that the anastomat is limited from moving outwards, and the pancreatic and intestinal anastomotic stoma is prevented from being pulled when the catheter 10 is pulled accidentally. The catheter limiting device 30 is made of medical absorbable materials, such as polylactic acid, polyvinyl alcohol, poly-p-dioxanone and the like, the absorbable materials are gradually absorbed by a human body after an operation, after a period of time, the catheter limiting device 30 is absorbed, the catheter can be detached after limiting failure, the limiting failure time of the catheter limiting device 30 is later than the time when a suture line is separated from a winding fixing device, and therefore the pancreatic and intestinal anastomotic stoma can not be pulled when the catheter is detached. It is best to set up the position that the folded groove 34 department is the thinnest position of pipe stop device material, such structure can make the material of folded groove 34 department absorbed preferentially, make piece 33 drop from fixed ring and rotating ring, lose the folded piece 33 that gets up and block, pipe stop device also can get into failure state, outwards pull pipe 10 this moment, fixed ring 31 moves along with pipe 10 and pushes away after contacting rotating ring 32 and crowd moving ring 32 and wear out the human body, compare in the whole required time of being absorbed completely of pipe stop device, the speed that the material was absorbed to exhaustion in folded groove 34 department is more easily controlled, for the designer, the size of folded piece 33 and folded groove 34 is convenient for more to design according to the human speed of recovering in folded groove 34 department material thinnest structure, make pipe stop device lose efficacy at the required time point.

Preferably, the folding piece 33 is provided with a strip-shaped thin plate, the plate surface of the folding piece 33 is opposite to the axis of the fixed ring, the folding groove 34 is arranged along the plate surface and is in a strip shape, and the length direction of the folding groove 34 is perpendicular to the length direction of the folding piece 33, so that the folding piece 33 can be bent more conveniently. The folding pieces 33 are preferably arranged in a plurality, and the folding pieces 33 are uniformly distributed on the circumference by taking the axis of the fixed ring 31 as the center, so that the radial size of the catheter limiting device 30 can be increased after the folding pieces 33 are bent, and the limiting effect and the stability of the catheter limiting device 30 are improved. Preferably, the folding groove 34 is formed on the outward facing surface of the folding member 33, which facilitates the processing of the folding groove 34. The cross section of the folding groove 34 can be set to any shape, but is preferably in the shape of an inward concave arc, such folding groove 34 is convenient for processing, and the possibility that the folding piece 33 is directly broken at the folding groove 34 when being folded can be reduced. Preferably, the fixed ring and the movable ring are coaxial and have the same outer diameter, and the outward plate surface of the folding piece 33 is on the same circumferential surface as the outer circumferential surfaces of the fixed ring and the movable ring, so that the catheter limiting device has small resistance when entering the human body. The end of the stationary ring 31 facing away from the movable ring 32 is preferably provided with a tapered structure, so that the tapered portion of the stationary ring 31 facilitates penetration into the intestinal wall and the wound of the abdominal wall during installation. Preferably, a plurality of anti-rotation grooves 35 are formed in the outer circumferential surface of the conical structure, the anti-rotation grooves 35 are uniformly distributed on the outer circumference of the conical structure, the anti-rotation grooves 35 are long-strip-shaped and are arranged along the direction of a generatrix of the outer circumferential surface of the conical structure, and the anti-rotation grooves 35 can increase the friction force between the rotating ring 32 and human tissues when the rotating ring rotates, so that the possibility of rotation of the catheter limiting device 30 is reduced, and the possibility of the whole anastomat rotating to pull the pancreatic and intestinal anastomotic stoma is further reduced. The outer surfaces of the fixed ring 31 and the movable ring 32 can be provided with absorption grooves, the absorption grooves can accelerate the absorption of materials, and are beneficial to reducing the external dimensions of the fixed ring 31 and the movable ring 32 when the pancreatico anastomotic stoma is healed, so that the resistance when the anastomat is dismantled is reduced, the absorption grooves can be set to be in various shapes such as square, round and annular shapes, and the like as long as the materials can be removed, the anti-rotation grooves 35 can be used as the absorption grooves on the fixed ring 31, and the absorption grooves on the movable ring 32 are not shown in the figure.

The catheter 10 of the external region 13 can be fixed by arranging a detachable external fixing device 40 outside the body, so that the catheter 10 of the external region 13 is prevented from entering the human body, and the external fixing device 40 is matched with the catheter limiting device 30 to realize the fixation of the external region 13 and the intestinal region 12 with the human body. The external fixing device 40 can be a common medical adhesive plaster, and the catheter 10 is adhered to the external skin by the adhesive plaster to realize fixation; the extracorporeal fixing device 40 may be a special catheter 10 fixing device, such as a catheter 10 fixing device disclosed in chinese patent application No. 201721806118.9 or a pancreatic duct external drainage fixing device disclosed in chinese patent application No. 201820952118.8, as long as the extracorporeal region 13 is prevented from moving into the human body.

As shown in figure 5, when the pancreatico-enterostomy instrument is used, firstly, the anastomat is penetrated into a human body, a catheter 10 penetrates through an abdominal wall 70, penetrates through a small intestine 60 and is inserted into the pancreatic duct, a fixing sleeve 21 is pressed against a fracture of the pancreatic duct, an intestinal region 12 and a catheter limiting device 30 are all inserted into the small intestine 60, the catheter limiting device 30 is in an initial state during penetration, then a pancreatic section, the fracture of the pancreatic duct and an intestinal wall are sutured, a suture thread is wound at the root part of a thread winding ear 22, after suturing, an external region 13 is pulled outwards, the catheter limiting device 30 is expanded to be in a limiting state, the catheter is further pulled, one end of the catheter is pulled out from the body, the small intestine is drawn by the catheter limiting device and is closed to the abdominal wall, the catheter is fixed outside the body by the catheter fixing device, so that the positions of the pancreas, the small intestine and the abdominal wall are relatively stable, the installation of the pancreatico-enterostomy instrument is completed, pancreatic juice is collected by a drainage tube, is discharged out of the body through the other end of the catheter of the anastomat.

The provision of the folding groove 34 around the root of the lug 22 and the fold 33 is designed so that the time taken for the absorption to be exhausted is slightly longer than the time taken for the pancreaticotomy to heal. In the operation recovery process, the materials of the winding fixing device 20 and the catheter limiting device 30 are gradually absorbed by the human body, after the pancreatico-enterostomy is healed, the materials of the root of the winding ear 22 and the folding piece 33 at the folding groove 34 are completely absorbed, the winding ear 22 and the folding piece 33 fall off, the catheter 10 is pulled outwards at the moment, the movable ring 32, the fixed ring 31 and the fixed sleeve 21 on the catheter 10 can sequentially penetrate through the small intestine 60 and the opening on the abdominal wall 70, the anastomat is dismantled, pancreatic juice is returned to the small intestine as soon as possible, and then the wound which is passed by the anastomat on the abdominal wall and the intestinal wall and the joint of the pancreatic section and the intestinal wall are healed slowly. The specific examples are merely illustrative of the invention and are not intended to be limiting.

Claims

1. The utility model provides a pancreas intestines anastomat, includes pipe (10), is provided with drainage hole (14) on the pipe wall of pipe (10), its characterized in that: the novel medical catheter is characterized by further comprising a winding fixing device (20) and a catheter limiting device (30) which are fixedly arranged on the outer wall of the catheter (10), the catheter (10) is sequentially divided into a pancreas inner area (11), an intestine area (12) and an external area (13) in the length direction of the catheter, the drainage holes (14) are formed in the pancreas inner area (11), the winding fixing device (20) is arranged at the junction of the pancreas inner area (11) and the intestine area (12), and the catheter limiting device (30) is arranged at the junction of the intestine inner area (12) and the external area (13); the winding fixing device (20) comprises a circular tube-shaped fixing sleeve (21) and a winding lug (22), the fixing sleeve (21) is sleeved on the guide pipe (10), one end, close to the pancreas inner area (11), of the winding lug (22) is fixedly arranged on the outer circumferential surface of the fixing sleeve (21), and the other end of the winding lug is a free end; the catheter limiting device (30) comprises a fixed ring (31), a movable ring (32) and a folding piece (33) connecting the movable ring (32) and the fixed ring (31), the fixed ring (31) is sleeved on the catheter (10) and fixed with the catheter (10), the movable ring (32) is sleeved on the catheter (10) and can axially move along the catheter (10), the movable ring (32) is located at one end, far away from the intestinal region (12), of the fixed ring (31), and folding grooves (34) are respectively formed in the two ends of the folding piece (33) and in the middle of the folding piece (33) in the length direction; when the movable ring (32) is close to the fixed ring (31), the folding piece (33) is bent at the folding groove (34), and the middle position of the folding piece (33) is bent towards the direction far away from the axis of the fixed ring (31); the winding fixing device (20) and the catheter limiting device (30) are both made of medical absorbable materials;

the specific surface area of the fixing sleeve (21) is smaller than that of the winding lug (22).

2. The pancreaticojejunostomy device of claim 1, wherein: the surface of the winding lug (22) is provided with a fixing groove (23), and the fixing groove (23) surrounds the root of the winding lug (22) for a circle.

3. The pancreaticojejunostomy device of claim 1, wherein: the end, back to the intestinal inner area (12), of the peripheral surface of the fixing sleeve (21) is a circular table top, and the end with the smaller diameter of the circular table top is located at the end part.

4. The pancreaticojejunostomy device of claim 1, wherein: the outer surface of the fixed sleeve (21) is provided with an anti-skid groove (24).

5. The pancreaticojejunostomy device of claim 1, wherein: the folding pieces (33) are long-strip-shaped and are arranged along the axial direction of the fixed ring (31), and the folding pieces (33) are provided with a plurality of uniform circumferential distributions by taking the axis of the fixed ring (31) as the center.

6. The pancreaticojejunostomy device of claim 5, wherein: the folding groove (34) is positioned on the outward surface of the folding piece (33).

7. The pancreaticojejunostomy device of claim 1, wherein: the end of the stationary ring (31) facing the pancreatic inner region (11) is provided with a conical structure.

8. The pancreaticojejunostomy device of claim 1, wherein: the conduit (10) is rounded at its end within the pancreatic inner region (11).

9. The pancreaticojejunostomy device of claim 1, wherein: the device also comprises an extracorporeal fixing device (40) detachably and fixedly connected with the catheter (10), wherein the extracorporeal fixing device (40) is arranged on the extracorporeal area (13).

10. The pancreaticojejunostomy device of claim 1, wherein: the fixed ring (31) and/or the movable ring (32) are provided with absorption grooves.

11. The pancreaticojejunostomy device of claim 1, wherein: an anti-rotation groove (35) is formed in the fixed ring (31), and the anti-rotation groove (35) is a long groove with the length being arranged along the generatrix of the fixed ring (31).