Wire winding fixing device for pancreaticojejunal stapler and pancreaticojejunal stapler

Abstract

The object of the present invention is to provide a wire winding fixing device for a pancreatic-intestinal stapler having a structure for fixing a human body and a catheter that is different from that of the prior art, and a pancreatic-intestinal stapler. The wire winding fixing device for the pancreatic-intestinal stapler comprises a cylindrical fixing sleeve and a wire winding ear, one end of the wire winding ear is fixedly arranged on the fixing sleeve, and the other end is a free end. The wire winding fixing device is made of a medical absorbable material. The pancreatic-intestinal stapler comprises a catheter, which is provided with a drainage hole, and also comprises the above-mentioned wire winding fixing device. The fixing sleeve is arranged on the catheter and is fixedly connected to the catheter. It is very convenient to remove the catheter using the structure of the present invention.

Description

Technical Field

[0001] The invention relates to a medical device, in particular to a wire winding fixing device for a pancreatico-enteric stapler and the pancreatico-enteric stapler. Background Art

[0002] After the pancreatic head is removed, a pancreaticojejunostomy is required to allow the pancreatic juice to flow back into the small intestine. This operation requires a small hole to be cut in the intestinal wall first, and then the intestinal wall is sutured with the pancreatic section and the broken end of the pancreatic duct to close the pancreatic section and recreate the pancreaticojejunostomy. Since pancreatic juice is corrosive, when the pancreaticojejunostomy has not yet healed, the contact of the pancreaticojejunostomy with pancreatic juice will prolong the healing time. Therefore, it is best to drain the pancreatic juice out of the body before the pancreaticojejunostomy heals. The existing technology uses a pancreaticojejunostomy stapler to drain the pancreas and intestine out of the body. The existing pancreaticojejunostomy stapler includes a catheter for connecting the pancreatic duct and a structure for fixing the human body and the catheter. There are many different pancreaticojejunostomy staplers on the market, and they use different structures and methods to fix the human body and the catheter. Summary of the invention

[0003] The purpose of the present invention is to provide a wire winding fixing device for a pancreatico-enteric stapler and a pancreatico-enteric stapler, which has a structure for fixing a human body and a catheter different from that of the prior art.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A wire winding fixing device for a pancreatico-enteric stapler comprises a cylindrical fixing sleeve and a wire winding ear. One end of the wire winding ear is fixedly arranged on the fixing sleeve and the other end is a free end. The wire winding fixing device is made of medical absorbable material.

[0006] Preferably, the specific surface area of ​​the fixing sleeve is smaller than the specific surface area of ​​the winding ear.

[0007] Preferably, a fixing groove is provided on the surface of the winding ear, and the fixing groove surrounds the base of the winding ear.

[0008] Preferably, the winding ear is in the shape of an elongated strip, and the length direction of the winding ear is parallel to the axial direction of the fixing sleeve.

[0009] Preferably, two winding ears are provided and are arranged on the fixing sleeve in a mirror-symmetrical manner.

[0010] Preferably, one end of the fixing sleeve close to the free end of the winding ear is configured in a truncated cone shape, and the end with a smaller diameter of the truncated cone is located at the end.

[0011] Preferably, the end of the fixing sleeve away from the free end of the winding ear is arranged in a truncated cone shape, and the end with a smaller diameter of the truncated cone is located at the end.

[0012] Preferably, an anti-slip groove is provided on the outer surface of the fixing sleeve.

[0013] Preferably, a clearance groove is provided at a position where the fixing sleeve is opposite to the winding ear.

[0014] A pancreatico-enteric stapler comprises a catheter, a drainage hole is arranged on the catheter, and the above-mentioned winding fixing device, wherein a fixing sleeve is arranged on the catheter and fixedly connected with the catheter.

[0015] The present invention has the following beneficial effects:

[0016] The wire winding fixing device of the present invention comprises a cylindrical fixing sleeve and a wire winding ear with one end fixed and the other end free. When in use, the gap between the pancreatic duct and the catheter is blocked by the fixing sleeve. During surgery, the suture is wound around the root of the wire winding ear to fix the relative position of the pancreaticojejunal anastomosis and the stapler, so that the catheter is stable in the human body. The wire winding fixing device is made of medical absorbable material. After the pancreaticojejunal anastomosis is healed, the wire winding fixing device can be absorbed, so that the suture is separated from the catheter. At this time, the stapler can be removed by pulling out the catheter, and the removal of the catheter is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a wire winding fixing device for a pancreatico-enteric stapler of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the pancreatico-enteric stapler of the present invention;

[0019] Figure 3 is a schematic structural diagram of the catheter fixing device of the present invention, wherein the catheter fixing device is in an initial state;

[0020] Figure 4 is a schematic diagram of the structure of the catheter fixing device in the present invention, wherein the catheter fixing device is in a limited position state;

[0021] Figure 5 This is a schematic diagram of the position of the pancreaticojejunal stapler and human organs when in use.

[0022] Explanation of the reference numerals: 10, catheter; 11, intrapancreatic area; 12, intraintestinal area; 13, extracorporeal area; 14, drainage hole; 20, wire winding fixing device; 21, fixing sleeve; 22, wire winding ear; 23, fixing groove; 24, anti-slip groove; 25, yield groove; 30, catheter limiting device; 31, fixed ring; 32, moving ring; 33, folding piece; 34, folding groove; 40, extracorporeal fixing device; 50, pancreas; 60, small intestine; 70, abdominal wall. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings, wherein the same components are represented by the same reference numerals.

[0024] A pancreatico-enteric stapler, such as Figure 2As shown, it includes a catheter 10 and a wire-wrap fixing device 20. One end of the catheter 10 penetrates the abdominal wall 70 and the small intestine 60 and is inserted into the pancreatic duct, and the other end is located outside the abdominal wall 70. The catheter 10 is used to connect the pancreatic duct and the outside of the body to guide the pancreatic juice out. Figure 2 and Figure 5 As shown, the catheter 10 is a long and thin tube, which is divided into an intrapancreatic area 11, an intestinal area 12 and an extrapancreatic area 13 in the length direction. When in use, the extrapancreatic area 13 is mainly located outside the human body, the intestinal area 12 is located in the small intestine 60, and the intrapancreatic area 11 is located in the pancreatic duct. The wall of the catheter 10 in the intrapancreatic area 11 is provided with a drainage hole 14 connecting the inside and outside of the catheter 10, and the pancreatic juice in the pancreatic duct enters the catheter 10 through the drainage hole 14.

[0025] like Figure 1 As shown, the wire winding fixing device 20 includes a fixing sleeve 21 and a wire winding ear 22. The fixing sleeve 21 is a round tube, the inner wall of which is adapted to the outer wall of the catheter 10 and fixedly arranged at the junction of the pancreatic region 11 and the intestinal region 12 of the catheter. When in use, the fixing sleeve 21 is located at one end of the pancreatic region 11 to block the gap between the pancreatic duct and the catheter 10, and prevent pancreatic fluid from flowing out of the gap between the pancreatic duct and the catheter 10. The wire winding ear 22 is arranged in the direction of the tube centerline of the fixing sleeve, and is fixedly arranged on the outer circumferential surface of the fixing sleeve 21, wherein one end of the wire winding ear 22 close to the pancreatic region 11 is connected to the fixing sleeve 21, and the other end is a free end. When in use, one end of the catheter penetrates the abdominal wall 70 and the small intestine 60 so that the intrapancreatic area of ​​the catheter is inserted into the pancreatic duct, the fixed sleeve blocks the gap between the pancreatic duct and the catheter, and the intestinal wall, the pancreatic 50 section and the pancreatic duct cut are sutured with sutures. The sutures for suturing the intestinal wall, the pancreatic 50 section and the pancreatic duct cut are wound around the connection between the winding ear 22 and the fixed sleeve 21, thereby preventing the winding fixing device 20 from moving before the pancreaticojejunostomy is healed to cause pancreatic fluid leakage, thereby preventing the winding fixing device 20 and the catheter 10 from moving before the pancreaticojejunostomy is healed. In this way, the winding ear 22 with one end open and the other end connected is more convenient for winding sutures during surgery. The winding fixture 20 is made of medical absorbable materials, such as polylactic acid, polyvinyl alcohol, polydioxanone and the like. After the operation, the winding fixture 20 is gradually absorbed by the human body. According to the recovery speed of the human body, the time when the winding fixture 20 is absorbed is set to be slightly later than the healing time of the pancreaticojejunal anastomosis, so that the time when it is absorbed by the human body is slightly later than the healing time of the pancreaticojejunal anastomosis. In this way, after the pancreaticojejunal anastomosis is healed, the suture can be separated from the catheter 10, so that the stapler can be removed. In this way, when removing the stapler, as long as the pancreaticojejunal anastomosis is healed and the pancreatic fluid does not overflow, it is not necessary to wait until the surgical thread is completely absorbed and the junction between the pancreatic section and the intestinal wall is completely healed. The time for removing the stapler catheter can be greatly advanced, so that the pancreatic fluid can return to the human body as soon as possible.

[0026] Preferably, the specific surface area of ​​the fixed sleeve 21 is smaller than the specific surface area of ​​the winding ear 22, so that the absorption speed of the winding ear 22 is faster than that of the fixed sleeve 21, and the winding ear 22 will be absorbed first, so that the suture is separated from the catheter before the fixed sleeve 21 is completely absorbed, and the catheter can be removed without the constraint of the suture. At this time, the degree of absorption and deformation of the fixed sleeve 21 is relatively small, and the impact on the blocking ability of the fixed sleeve 21 is relatively small, which can better meet the requirements that the stapler needs to remain stable before the pancreatico-enteric anastomosis heals and the stapler can be quickly removed after healing. It is best to set a fixing groove 23 on the surface of the root of the winding ear 22. The fixing groove 23 surrounds the root of the winding ear 22. The fixing groove 23 can not only constrain the suture to improve the stability of the suture, but also reduce the material at the root of the winding ear 22. The root of the winding ear 22 will be absorbed before the winding ear body, causing the winding ear to fall off. The connection between the suture and the winding fixing device 20 will change from a stable connection state to a disconnected state as the winding ear 22 falls off. In this way, there is no need to wait for the winding ear 22 to be completely absorbed, and the deformation of the fixing sleeve 21 will be smaller when the suture falls off. The anastomosis device is fixed to the human body by winding the suture on the winding ear 22. Only one end of the winding ear 22 is fixedly connected to the fixing sleeve 21, which is convenient for the designer to determine the thickness of the material at the connection according to the relationship between the healing speed of the human wound and the absorption speed of the material. For example, when using the above-mentioned polylactic acid, polyvinyl alcohol, polydioxanone and other materials, the cross-sectional area of ​​the connection between the winding ear 22 and the fixing sleeve can be set at 0.2mm 2 ~1mm 2 between.

[0027] The winding ear 22 is preferably configured as a long strip structure, and its length direction is parallel to the axis of the fixing sleeve 21. The long strip structure can make the winding ear 22 have a relatively large volume and a relatively small root. Under the premise of not extending the time required for the winding ear 22 to fall off, the larger winding ear 22 is more convenient for the doctor to observe and operate during the operation; the long strip winding ear 22 is also relatively less resistant when entering the human body; in addition, the longer winding ear 22 can also reduce the possibility of the suture falling off the winding ear 22.

[0028] Preferably, a plurality of anti-skid grooves 24 are provided on the outer surface of the fixing sleeve 21 along the circumference of the fixing sleeve 21, and the plurality of anti-skid grooves 24 are arranged axially along the fixing sleeve 21. The anti-skid grooves 24 can increase the resistance between the fixing sleeve 21 and the surrounding human tissue when the fixing sleeve 21 moves axially, which helps to improve the stability of the winding fixation device 20 during surgery and wound healing, and can also accelerate the absorption of the fixing sleeve 21.

[0029] It is best to provide two winding ears 22, and symmetrically arranged on the fixing sleeve 21. When in use, the wire is wound on both winding ears 22, which helps to maintain the balance of the winding fixing device 20.

[0030] It is best to set a clearance groove 25 at the position of the fixing sleeve 21 opposite to the winding ear 22, so that a larger space can be reserved for the suture thread, which helps to expose the winding ear 22 to the human body and helps to improve the material absorption efficiency.

[0031] The outer wall of the end of the fixed sleeve 21 that blocks the pancreatic duct is preferably set as a frustum, wherein the end with a smaller diameter of the frustum faces outward, so that when blocking the gap between the pancreatic duct and the catheter, part of the frustum can enter the pancreatic duct and fit with the inner wall of the pancreatic duct, increasing the contact area between the fixed sleeve 21 and the inner wall of the pancreatic duct, which helps to improve the blocking effect of the fixed sleeve and reduce the possibility of pancreatic fluid outflow; in addition, the frustum structure has less resistance when entering human tissue. Preferably, the outer wall of the fixed sleeve 21 near the intestinal area 12 is also set as a frustum, wherein the end with a smaller diameter of the frustum faces outward, and when removing the stapler, this frustum can play a guiding role, which helps to reduce the resistance of the fixed sleeve 21 when passing through the intestinal wall and the abdominal wall 70.

[0032] like Figure 5 As shown, in addition to the catheter 10 and the wire winding fixing device 20 fixed on the catheter 10, the pancreatico-enteric stapler of the present invention can also be provided with a catheter limiting device 30 for limiting the movement of the catheter 10 outside the human body and an external fixing device 40 for limiting the movement of the catheter 10 into the human body, so as to prevent the movement of the external catheter 10 and the pancreatico-enteric anastomosis. A feasible structure is given below for illustration.

[0033] Combination Figure 2-4As shown, the catheter limiting device 30 includes a fixed ring 31, a movable ring 32 and a folding piece 33. The fixed ring 31 is sleeved on the catheter 10 and fixed to the catheter 10, and the movable ring 32 is sleeved on the catheter 10 and can move along the axial direction of the catheter 10, wherein the fixed ring 31 is arranged adjacent to the winding fixing device 20, and the folding piece 33 is long and arranged along the axial direction of the fixed ring, and the folding piece 33 is arranged between the fixed ring 31 and the movable ring 32, and its two ends are respectively connected to the fixed ring 31 and the movable ring 32. Folding grooves 34 are respectively arranged at both ends and in the middle of the folding piece 33. When the catheter limiting device 30 enters the human body in the initial state with the folding piece 33 stretched, the movable ring 32 abuts against the intestinal wall. At this time, the catheter 10 is pulled outward, the movable ring 32 will approach the fixed ring 31, the folding piece 33 will bend at the folding groove 34, and the middle part of the folding piece 33 will bend in the direction away from the axis of the fixed ring 31. The bent folding piece 33 makes the catheter limiting device 30 larger in the radial direction of the fixed ring and enters a limiting state. The catheter limiting device 30 in the limiting state cannot pass through the opening on the human body for the catheter limiting device 30 to enter, thereby limiting the catheter 10 from further moving out of the human body, thereby avoiding the pancreatico-intestinal anastomosis being pulled when the catheter 10 is accidentally pulled. The catheter stopper 30 is made of medical absorbable material, such as polylactic acid, polyvinyl alcohol, polydioxanone, etc. After the operation, the absorbable material is gradually absorbed by the human body. After a period of time, the catheter stopper 30 is absorbed and the stopper fails, and the catheter can be removed. The time when the catheter stopper 30 fails should be later than the time when the suture is separated from the winding fixing device, so as to ensure that the pancreaticojejunostomy will not be affected when the catheter is removed. Of course, the catheter stopper 30 can also adopt other structures that can limit the movement of the catheter 10.

[0034] The extracorporeal fixing device 40 can be a common medical tape, through which the catheter 10 is adhered to the skin outside the body; the extracorporeal fixing device 40 can also be a special catheter 10 fixing device, such as a catheter 10 fixing device disclosed in Chinese patent application number 201721806118.9, or a pancreatic duct external drainage fixing device disclosed in Chinese patent application number 201820952118.8, as long as the extracorporeal region 13 catheter 10 can be stably fixed outside the body.

[0035] When in use, the stapler is first inserted into the human body, the catheter 10 passes through the abdominal wall 70, penetrates the small intestine 60 and enters the pancreatic duct, the intrapancreatic area 11 enters the pancreatic duct, the fixed sleeve 21 presses against the cut end of the pancreatic duct, the intraintestinal area 12 and the catheter limiting device 30 in the initial state all enter the small intestine 60, and then the pancreatic cross section, the pancreatic duct cut end and the intestinal wall are sutured and the suture is wrapped around the root of the winding ear 22. After the suturing is completed, the catheter 10 is pulled outward, and the fixed ring 31 moves accordingly to approach the dynamic ring 32 pressing against the intestinal wall, and the folding piece 33 is bent to expand the catheter limiting device 30 to limit the catheter 10 from continuing to move outward, and then the catheter 10 is fixed from outside the body with the external fixing device 40 to complete the installation of the pancreatico-intestinal stapler.

[0036] The root of the winding ear 22 and the folding groove 34 of the folding piece 33 are designed to be absorbed in a slightly longer time than the time taken for the pancreaticojejunostomy to heal. During the recovery process of the operation, the materials of the winding fixing device 20 and the catheter limiting device 30 are gradually absorbed by the human body. After the pancreaticojejunostomy is healed, the materials of the root of the winding ear 22 and the folding groove 34 of the folding piece 33 will be absorbed, and the winding ear 22 and the folding piece 33 will fall off. At this time, the catheter 10 is pulled outward, and the dynamic ring 32, the fixed ring 31 and the fixed sleeve 21 on the catheter 10 can pass through the openings on the small intestine 60 and the abdominal wall 70 in turn, and the stapler is removed, so that the pancreatic juice returns to the small intestine as soon as possible, and then the wounds on the abdominal wall and the intestinal wall for the stapler to pass through and the junction of the pancreatic section and the intestinal wall are slowly healed.

[0037] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention.

Claims

1. A wire winding fixing device for a pancreatico-enteric stapler, characterized in that: It comprises a cylindrical fixing sleeve (21) and a wire winding ear (22), one end of the wire winding ear (22) is fixedly arranged on the fixing sleeve (21), and the other end is a free end, and the wire winding fixing device is made of a medical absorbable material; The specific surface area of ​​the fixing sleeve (21) is smaller than the specific surface area of ​​the winding ear (22); A fixing groove (23) is provided on the surface of the winding ear (22), and the fixing groove (23) surrounds the root of the winding ear (22); One end of the fixing sleeve (21) close to the free end of the winding ear (22) is configured as a truncated cone, and the end of the truncated cone with a smaller diameter is located at the end; An anti-slip groove (24) is provided on the outer surface of the fixing sleeve (21); The winding ear (22) is in the shape of an elongated strip, and the length direction of the winding ear (22) is parallel to the axial direction of the fixing sleeve (21); During the operation, sutures are wrapped around the base of the winding ears to fix the relative position of the pancreaticojejunostomy and the stapler.

2. The wire winding fixing device for a pancreatico-enteric stapler according to claim 1, characterized in that: Two winding ears (22) are arranged on the fixing sleeve (21) in a mirror-symmetrical manner.

3. The wire winding fixing device for a pancreatico-enteric stapler according to claim 1, characterized in that: The end of the fixing sleeve (21) away from the free end of the winding ear (22) is arranged in a truncated cone shape, and the end of the truncated cone with a smaller diameter is located at the end.

4. The wire winding fixing device for a pancreatico-enteric stapler according to claim 1, characterized in that: A clearance groove (25) is provided at a position opposite to the fixing sleeve (21) and the winding ear (22).

5. A pancreatico-enteric stapler, comprising a catheter (10), the catheter (10) being provided with a drainage hole (14), characterized in that: It also comprises a wire winding fixing device as claimed in any one of claims 1 to 4, wherein the fixing sleeve (21) is sleeved on the catheter (10) and fixedly connected to the catheter (10).

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