Pancreas and intestine magnetic anastomat

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a pancreas and intestine magnetic anastomat which comprises a tube body, a flow guide hole is formed in the tube wall of the tube body, a backflow inner hole is formed in the tube body, the flow guide hole is formed in the far end of the tube body, the flow guide hole is communicated with the backflow inner hole, a magnetic ring clamping groove is further formed in the tube body, and the magnetic ring clamping groove is communicated with the backflow inner hole. The outer wall of the magnetic ring clamping groove is connected with at least two magnetic rings in a sleeved mode, an opening spacer sleeve is arranged between the two magnetic rings, organs and tissues needing to be anastomosed are clamped through the magnetic force effect of the magnetic rings, the suturing operation difficulty in an operation is reduced, and the work intensity of a doctor is relieved.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically a pancreaticojejunostomy device. Background Technology

[0002] The most effective treatment for pancreatic cancer is pancreaticoduodenectomy. Pancreaticoduodenectomy is also a major surgical procedure for treating tumors of the pancreatic head, duodenal papilla, ampullary region, and descending duodenum; it is one of the most significant surgeries in abdominal surgery. The surgery involves removing six organs in the pancreaticoduodenal region and performing three anastomoses: pancreaticojejunostomy, choledochojejunostomy, and gastrojejunostomy. Because pancreatic tissue is very fragile and the pancreatic juice it secretes has a strong corrosive effect, pancreaticojejunostomy failure leading to pancreatic fistula has always been a challenging problem for pancreatic surgeons. During the surgery, the narrow cavities of the pancreatic tissue require highly skilled suturing techniques from the medical staff, easily resulting in incomplete anastomosis, fistula formation, and pancreatic fistula.

[0003] Therefore, existing technologies are looking for solutions to the difficulties in pancreaticoduodenectomy anastomosis, reducing the difficulty of the surgeon's operation, and increasing the success rate of the surgery. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a pancreaticojejunostomy device that is reasonably designed, simple in structure, easy to use, reduces the workload of surgeons in suturing, and lowers the risks associated with poor suturing.

[0005] This utility model provides the following technical solution: a pancreaticojejunostomy device, comprising a tube body, a guide hole on the tube wall, a backflow inner hole inside the tube body, the guide hole being located at the distal end of the tube body, the guide hole and the backflow inner hole being connected, and a magnetic ring slot on the tube body, wherein at least two magnetic rings are sleeved on the outer wall of the magnetic ring slot, and an opening stop is provided between the two magnetic rings.

[0006] The pancreaticojejunostomy device in the above technical solution is made of a stable, elastic, and strong polymer material such as PE, PU, ​​or TPU. The tube body is extruded and has a drainage hole to guide the drainage of pancreatic juice. The drainage hole and the backflow inner hole are connected to drain the pancreatic juice out of the body. To prevent the magnetic rings from sticking together when not in use, an open sleeve is used to block the magnetic rings. After peeling off the open sleeve, the prepared anastomosis site of the intestinal body and the anastomosis site of the pancreatic body are placed between the two magnetic rings. Then, due to the magnetic force, the magnetic rings will clamp the organs and tissues to be anastomosed.

[0007] The two magnetic rings include a first magnetic ring and a second magnetic ring, which are located at the two ends of the opening sleeve, respectively. The two contact surfaces of the first magnetic ring and the second magnetic ring have opposite magnetic properties. When the opening sleeve is peeled off, the first magnetic ring and the second magnetic ring slide towards each other along the magnetic ring slot to complete the attraction.

[0008] The drainage hole is located inside the pancreas, the second magnetic ring is located inside the pancreas, the first magnetic ring is located inside the intestine, and the intestinal anastomosis and the pancreatic anastomosis are located between the first magnetic ring and the second magnetic ring. When the opening sleeve is peeled off, the first magnetic ring and the second magnetic ring clamp the intestinal anastomosis and the pancreatic anastomosis to be anastomosed due to magnetism.

[0009] The opening retainer has an opening through groove on one side wall, through which the opening retainer and the outer wall of the magnetic ring slot are installed and removed.

[0010] The magnetic ring slot is formed by a pair of shoulders on the tube body, with the tube body and the shoulders forming the magnetic ring slot between the pair of shoulders.

[0011] The shoulder serves two purposes: first, it limits the position of the magnetic rings during anastomosis. During surgery, the pancreaticojejunostomy device is inserted. When the second magnetic ring is inside the pancreas and the opening sleeve is inside the intestine, the opening sleeve is removed. Surgical instruments are used to assist in positioning the already prepared intestinal-to-pancreatic anastomosis between the two magnetic rings. At this point, one end of the second magnetic ring rests against the adjacent shoulder, and the other end rests against the prepared pancreatic-to-pancreatic anastomosis, providing support for both anastomosis. The first magnetic ring is then moved closer to the second. Subsequently, the first and second magnetic rings will attract each other due to their opposite magnetic properties, eventually clamping the intestinal-to-pancreatic anastomosis together. This prevents the first and second magnetic rings from magnetically attracting each other during the preparation of the anastomosis, thus avoiding any hindrance to the process. Secondly, it prevents the magnetic rings from falling off.

[0012] Each shoulder has a larger outer diameter at the end closest to the magnetic ring than at the end furthest from the magnetic ring. The maximum diameter of the shoulder is greater than or equal to the outer diameter of the magnetic ring. Because the shoulder is higher than the outer wall of the tube, the variation in the shoulder's length along the tube's axis facilitates the insertion and withdrawal of the pancreaticojejunal magnetic anastomosis device and minimizes damage to other tissues. The maximum diameter of the shoulder is located at the end adjacent to the magnetic ring, and this maximum diameter, greater than or equal to the outer diameter of the magnetic ring, prevents the magnetic ring from having excessive protrusions that could scrape tissue during insertion and withdrawal.

[0013] The proximal end connection joint of the tube body.

[0014] The above-mentioned connectors can be used with connectors of different structures and functions, such as Luer connectors and quick-connect connectors.

[0015] The drainage holes are machined on one side of the tube at intervals on both the front and back sides. This facilitates the rapid drainage of pancreatic juice.

[0016] The outer diameter of the tube is 2mm-4mm, and the outer diameter of the magnetic ring is 4mm-6mm. Because the surgery requires a small incision in the patient's abdomen, the size was chosen to consider both the size of the incision and the magnetic anastomosis effect of the magnetic ring. Furthermore, if the magnetic ring is too large, firstly, the openings of the pancreatic and intestinal bodies will inevitably enlarge when the pancreaticojejunostomy device is inserted, increasing the subsequent suturing and finishing process; secondly, the pancreas and intestines are relatively fragile, and a large magnetic ring would result in a larger pressure area on the pancreatic anastomosis site, affecting the anastomosis effect.

[0017] The distal end of the tube is a guide cone, which serves for insertion and guidance.

[0018] Compared with the prior art, this utility model has the following beneficial effects: the drainage hole guides the drainage of pancreatic juice, and the drainage hole and the backflow inner hole are connected to drain the pancreatic juice out of the body, which has a drainage function and prevents pancreatic juice from corroding the wound and surrounding tissues; in order to prevent the magnetic rings from sticking together when not in use, an opening sleeve is used to block the magnetic rings. After peeling off the opening sleeve, the prepared intestinal body anastomosis and pancreatic body anastomosis are placed between the two magnetic rings. Then, due to the magnetic force, the magnetic rings will clamp the organs and tissues to be anastomosed, reducing the difficulty of suturing during surgery and reducing the workload of doctors. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a pancreaticojejunostomy device according to a specific embodiment 1 of the present invention;

[0020] Figure 2 This is a cross-sectional structural diagram of a pancreaticojejunostomy device according to a specific embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of a pancreaticoduodenectomy procedure involving the removal of part of the organs, as described in Embodiment 1 of this utility model.

[0022] Figure 4 This is a schematic diagram illustrating the use of a pancreaticojejunal magnetic anastomosis device according to a specific embodiment 1 of this utility model.

[0023] In the picture:

[0024] 1-Pipe body; 11-Backflow inner hole; 12-Drainage hole; 13-Guide cone; 14-Magnetic ring slot;

[0025] 2-Shoulder; 3-Magnetic ring; 31-First magnetic ring; 32-Second magnetic ring; 4-Opening retaining sleeve; 5-Connector. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In existing techniques, the posterior margin of the pancreatic stump is sutured to the jejunal loop at the mesenteric margin as the posterior layer of the anastomosis. The jejunum is then incised, and the posterior wall of the pancreatic duct is sutured to the jejunal wall with several fine sutures. Next, the anterior wall of the pancreatic duct is sutured to the other side of the jejunal incision with several sutures, and after tying the knots, a mucosal-to-mucosal anastomosis of the pancreatic duct and jejunum is completed, and a support catheter can be placed within the pancreatic duct. Then, approximately 1.5–2.0 cm from the pancreatic cut margin, the anterior pancreatic membrane is sutured to the jejunal wall with several sutures. After suturing, the two are brought together and the sutures are tied. As a result, the pancreatic stump is inserted into the jejunal lumen, and the insertion point of the pancreas and jejunum is then sutured for reinforcement. During the procedure, due to the fragility of the pancreatic tissue and the narrowness of the lumen, the suturing technique requires high skill from the medical staff, which can easily lead to incomplete anastomosis, fistulas, and pancreatic fistulas.

[0028] Specific Implementation Example 1: Please refer to Figure 1-4 Pancreaticojejunal magnetic anastomosis device, a digestive tract connector for digestive tract reconstruction during duodenectomy, used for anastomosing the pancreas and jejunum during digestive tract reconstruction in duodenectomy.

[0029] like Figure 1 , Figure 2 The "pancreaticojejunal magnetic anastomosis device" is constructed using a stable, elastic, and strong polymer material such as PE, PU, ​​or TPU. After extrusion molding, the tube body has a tapered guide cone 13 at the end for insertion and guidance. Drainage holes 12 are machined on both the front and back sides of the distal end of the tube body 1 to guide the drainage of pancreatic juice. Two shoulders 2 are then bonded to appropriate locations on the tube body 1, forming magnetic ring grooves 14. At this point, the two magnetic rings 3 (the first magnetic ring) are inserted... The first magnetic ring 31 and the second magnetic ring 32 are inserted into the magnetic ring slot 14. Note that the two surfaces of the two magnetic rings 3 that are in contact have different magnetic properties and can be attracted normally. To prevent the magnetic rings from attracting when not in use, an open sleeve 4 is used to block the magnetic rings 3 (between the first magnetic ring 31 and the second magnetic ring 32). One side wall of the open sleeve 4 is provided with an open through groove, which allows the installation and removal of the open sleeve 4 and the outer wall of the magnetic ring slot 14. A connector 5 is installed near the tube body 1 to facilitate the connection of the drainage container.

[0030] like Figure 3As shown, pancreaticoduodenectomy involves the en bloc removal of the pancreatic head, distal stomach, duodenum, gallbladder, distal common bile duct, proximal jejunum, and focal lymph nodes, followed by pancreaticojejunostomy, jejunocholic anastomosis, and gastrojejunostomy. The subsequent anastomosis of the pancreas, common bile duct, stomach, and jejunum to reconstruct the digestive tract is time-consuming and highly invasive. Therefore, it is necessary to be able to quickly complete the anastomosis between the pancreas, common bile duct, stomach, and jejunum to reduce surgical time and patient trauma.

[0031] like Figure 4 The tube body 1 has an inner diameter of 1-2 mm and an outer diameter of 2-4 mm; the magnetic ring 3 has an outer diameter of 4-6 mm. Therefore, a small hole can be made at a suitable location in the patient's abdomen, and the "pancreatico-intestinal magnetic anastomosis device" can be passed through the abdominal opening and pierced through the intestinal body until it reaches the pancreatic body (tail) remaining after the partial pancreatic resection. Then, surgical suturing is used to reshape the intestinal opening and pancreatic opening that need to be anastomosed. When the "pancreatico-intestinal magnetic anastomosis device" is inserted into the opening retainer 4 (that is, when the second magnetic ring 32 is in the pancreatic body and the opening retainer 4 is in the intestinal body), the opening retainer 4 is peeled off, and surgical instruments are used to assist the reshaped intestinal anastomosis and pancreatic anastomosis between the two magnetic rings 3. Then, due to the magnetic force, the magnetic rings 3 will clamp the organs and tissues that need to be anastomosed. At the same time, pancreatic juice secreted by the pancreas and fluids produced during the operation can enter the backflow inner hole 11 through the tube opening at the end of the tube body and the drainage hole 12, and be discharged from the body through the drainage container connected to the connector 5.

[0032] The aforementioned connector 5 can be connected to connectors of different structures and functions, such as Luer connectors and quick-connect connectors.

[0033] Specific Embodiment 2: The difference between this specific embodiment and Specific Embodiment 1 is that the shoulder 2 is integrally formed with the tube body 1.

[0034] Specific implementation 3: The difference from specific implementation 1 is that the inner diameter of tube 1 is 1mm and the outer diameter is 2mm; the outer diameter of magnetic ring 3 is 4mm.

[0035] Specific implementation 4: The difference from specific implementation 1 is that the inner diameter of tube 1 is 1.5mm and the outer diameter is 3mm; the outer diameter of magnetic ring 3 is 5mm.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pancreaticojejunostomy device, comprising a tube body, wherein the tube body has a flow guide hole on its wall, characterized in that, The tube body is provided with a backflow inner hole, and the guide hole is located at the far end of the tube body. The guide hole and the backflow inner hole are connected. The tube body is also provided with a magnetic ring slot. At least two magnetic rings are sleeved on the outer wall of the magnetic ring slot, and an opening sleeve is provided between the two magnetic rings.

2. The pancreaticojejunal magnetic anastomosis device according to claim 1, characterized in that: The two magnetic rings include a first magnetic ring and a second magnetic ring, which are located at the two ends of the opening sleeve, respectively. The two contact surfaces of the first magnetic ring and the second magnetic ring have opposite magnetic properties. When the opening sleeve is peeled off, the first magnetic ring and the second magnetic ring slide towards each other along the magnetic ring slot to complete the attraction.

3. The pancreaticojejunal magnetic anastomosis device according to claim 2, characterized in that: The drainage hole is located inside the pancreas, the second magnetic ring is located inside the pancreas, the first magnetic ring is located inside the intestine, and the intestinal anastomosis and the pancreatic anastomosis are located between the first magnetic ring and the second magnetic ring. When the opening sleeve is peeled off, the first magnetic ring and the second magnetic ring clamp the intestinal anastomosis and the pancreatic anastomosis to be anastomosed due to magnetism.

4. The pancreaticojejunal magnetic anastomosis device according to claim 1, characterized in that: The opening retainer has an opening through groove on one side wall, through which the opening retainer and the outer wall of the magnetic ring slot are installed and removed.

5. A pancreaticojejunostomy device according to claim 4, characterized in that: The magnetic ring slot is formed by a pair of shoulders on the tube body, with the tube body and the shoulders forming the magnetic ring slot between the pair of shoulders.

6. A pancreaticojejunal magnetic anastomosis device according to claim 5, characterized in that: The outer diameter of each shoulder is greater at the end closest to the magnetic ring than at the end furthest from the magnetic ring, and the maximum diameter of the shoulder is greater than or equal to the outer diameter of the magnetic ring.

7. The pancreaticojejunal magnetic anastomosis device according to claim 1, characterized in that: The proximal end connection joint of the tube body.

8. A pancreaticojejunostomy device according to claim 1, characterized in that: The flow guide holes are machined and installed on one side of the tube body at intervals on both the front and back sides.

9. A pancreaticojejunal magnetic anastomosis device according to claim 7, characterized in that: The outer diameter of the tube is 2mm-4mm, and the outer diameter of the magnetic ring is 4mm-6mm.

10. A pancreaticojejunal magnetic anastomosis device according to claim 1, characterized in that: The distal end of the tube is a guide cone.

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