Anti-leakage device after rectal cancer surgery

Abstract

The present invention discloses a postoperative leakage prevention device for rectal cancer, which is used to be inserted into the rectum after rectal cancer surgery; it includes a hollow hose, which realizes axial expansion and contraction and universal bending through its own segment structure; it includes a first hollow section and a second hollow section in sequence from the direction of insertion into the rectum, and the outer diameter of the first hollow section is greater than the outer diameter of the second hollow section. The present invention is aimed at preventing anastomotic leakage after rectal cancer surgery, and adopts a hollow tube body with different axial outer diameters as a support, the hollow tube body part with a large outer diameter is located in the intestinal cavity proximal to the anastomosis, and the anastomosis is located in the range of the hollow tube body part with a small outer diameter, and its outer diameter is smaller than the inner diameter of the anastomosis, which will not increase the tension of the anastomosis, and can avoid the defect of the intestinal stent breaking the anastomosis in the prior art, thereby causing the occurrence of anastomotic leakage. A quick docking structure is adopted to connect with the collection bag, which is convenient for replacing the collection bag.

Description

Technical Field

[0001] The invention relates to the technical field of medical supplies, in particular to a leakage prevention device after rectal cancer surgery. Background Art

[0002] At present, there is a risk of anastomotic leakage after low-level anastomosis for rectal cancer. Once anastomotic leakage occurs, it will cause serious complications. Temporary ileal protective colostomy can protect the occurrence of anastomotic leakage and reduce the complications caused by anastomotic leakage. The more common practice of protecting the anastomosis is to make a protective colostomy on the human abdominal wall, that is, after the colon is cut off, the colon ends that are connected to the esophagus and stomach are pulled to the abdominal wall and fixed on the abdominal wall to form a temporary colostomy. After the anastomosis in the rectum is healed, a secondary operation is performed to restore the intestine. However, the secondary restoration also has the risk of complications such as anastomotic leakage and intestinal obstruction. How to avoid secondary restoration surgery and avoid the risks brought by secondary restoration has always been a direction explored by anorectal surgeons.

[0003] Existing intestinal stents do not have the functions of axial expansion and universal bending, and the outer diameter of existing intestinal stents is greater than or equal to the inner diameter of the anastomosis. When the rectum bends and expands, the intestinal stent will cause the anastomosis of the inner wall of the rectum to open, and then rupture the anastomosis, causing anastomotic leakage. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a rectal cancer postoperative leakage prevention device and a use method thereof in view of the deficiencies of the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a postoperative leakage prevention device for rectal cancer, which is used to be inserted into the rectum after rectal cancer surgery; it includes a hollow hose, which realizes axial expansion and contraction and universal bending through its own segment structure; it includes a first hollow section and a second hollow section in sequence from the direction of insertion into the rectum, the outer diameter of the first hollow section is larger than the outer diameter of the second hollow section, and the outer diameter of the second hollow section is smaller than the inner diameter of the rectal anastomosis.

[0006] In the above technical solution, the tubular body with a segmented structure formed by a memory metal mesh is used as a support and is covered with the waterproof elastic coating layer to form the hollow hose.

[0007] In the above technical solution, the tubular body with segment structure is formed by sequentially splicing a number of memory metal mesh circular ring segments with successively larger or smaller radii, and adjacent memory metal mesh circular ring segments have relative expansion and contraction margins.

[0008] In the above technical solution, the adjacent memory metal mesh ring segments are movably connected via wires.

[0009] In the above technical solution, the memory metal mesh is bonded and fixed to the waterproof elastic covering layer.

[0010] In the above technical solution, the outer diameter of the first hollow section is 2-5 cm, and the axial length is 1-3 cm.

[0011] In the above technical solution, the outer diameter of the second hollow section is 1-3 cm, and the axial length is 5-15 cm.

[0012] In the above technical solution, the end of the second hollow section is connected to a collection bag via a quick connection structure.

[0013] The method for using the postoperative leakage prevention device for rectal cancer comprises inserting the first hollow section of the postoperative leakage prevention device for rectal cancer from the anus into the rectum to the inner side of the rectal anastomosis.

[0014] In the above technical solution, the starting end of the second hollow section is inserted into the inner side of the anastomotic opening and the axial length from the starting end to the anastomotic opening is 0.5-2 cm.

[0015] The beneficial effects of the present invention are:

[0016] 1. For the recovery of anastomosis after rectal cancer surgery, a hollow tube body with different axial outer diameters is used as support. The part of the hollow tube body with a large outer diameter is located on the inner side of the anastomosis, and the anastomosis is located within the range of the part of the hollow tube body with a small outer diameter. This will not increase the tension of the anastomosis, avoid the problem of anastomotic leakage caused by the anastomosis being stretched in the prior art, and promote the growth and healing of the anastomosis.

[0017] 2. This device adopts a quick connection structure to connect with the collection bag, which is convenient for replacing the collection bag.

[0018] 3. This device adopts a segmental structure, has excellent axial expansion and contraction and universal bending functions, and can adapt to the expansion and contraction and bending of the rectum. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the anus and intestine.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the leakage prevention device of the present invention.

[0021] Figure 3 It is a detailed structural schematic diagram of the leakage prevention device of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of a tubular body composed of several memory metal mesh ring segments of the leakage prevention device of the present invention (not connected by wires).

[0023] Figure 5 It is a schematic diagram of a quick connection structure of the collecting bag of the present invention.

[0024] Figure 6 It is a schematic diagram of another quick connection structure of the collecting bag of the present invention.

[0025] Figure 7 It is a schematic diagram of the implementation of the device of the present invention.

[0026] In the figure, 1, anus; 2, rectum; 3, anastomosis; 4, first hollow section; 5, second hollow section; 6, waterproof elastic coating layer; 7, memory metal mesh ring section; 8, collecting bag; 9, tight hoop; 10, nut; 11, wire body; 12, bag opening; 13, transition section. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1-7 As shown, a postoperative leakage prevention device for rectal cancer is used to be inserted into the rectum 2 after rectal cancer surgery; it includes a hollow hose, which realizes axial expansion and contraction and universal bending through its own segment structure; it includes a first hollow section 4 and a second hollow section 5 in sequence from the direction of insertion into the rectum 2, the outer diameter of the first hollow section 4 is larger than the outer diameter of the second hollow section 5, and the outer diameter of the second hollow section 5 is smaller than the inner diameter of the rectal anastomosis 3.

[0029] In this embodiment, the above-mentioned hollow hose is formed by a tubular body with a segmented structure formed by a memory metal mesh as a support and the waterproof elastic coating layer 6 is wrapped outside. The tubular body with a segmented structure is formed by splicing a plurality of memory metal mesh ring segments 7 with successively smaller radii in sequence, and the adjacent memory metal mesh ring segments 7 have a relative telescopic margin. The radius is successively reduced or enlarged relative to each other, and it is successively reduced from the beginning to the end in the second hollow segment 5. The memory metal mesh ring segment 7 of the next segment can be tightened in the memory metal mesh ring segment 7 of the previous segment, and because the adjacent memory metal mesh ring segments 7 are movably connected by the wire body 11, the wire body 11 has a margin for movement when connected, so the adjacent memory metal mesh ring segments 7 have an axial telescopic range. Of course, in addition to adopting a segmented tubular body structure, an integral structure can also be adopted according to design needs, similar to the commonly used telescopic plastic water pipe, which is spirally surrounded by a metal wire into a hollow tube, and plastic is used as a wall. According to medical needs, the plastic can be adjusted to a softer material, such as silicone, etc. In this embodiment, the waterproof elastic coating layer 6 adopts a silicone film, and can also adopt a heat shrink film, waterproof elastic cloth or waterproof elastic paper, etc.; the waterproof elastic coating layer 6 in this embodiment is an integrated structure, and can also adopt a split structure, such as a segmented metal mesh, but each segment needs to be sealed and connected. The memory metal mesh is used as the structural body of the tubular body. First, the memory metal mesh has a soft structure and good plasticity. Second, when inserted into the rectum 2, the device can be squeezed into a small volume at low temperature and then inserted into the rectum 2. The temperature in the rectum 2 restores the memory metal mesh to its original tubular structure. In this embodiment, the waterproof elastic coating layer 6 is only an outer layer, and can also be set as an inner layer. The edge of the memory metal mesh can be connected by a metal ring, or coated by a coating layer flange to avoid scratching the inner wall of the rectum 2.

[0030] In this embodiment, the outer diameter of the first hollow section 4 is 2-5 cm, and the axial length A is 1-3 cm. The outer diameter of the second hollow section 5 is 1-3 cm, and the axial length B is 5-15 cm. There is a transition section 13 between the first hollow section 4 and the second hollow section 5, and the transition section 13 is in the shape of a truncated cone.

[0031] In this embodiment, the memory metal mesh and the waterproof elastic coating layer 6 are bonded and fixed, and the bonding can be glue bonding or hot melting to weld the waterproof elastic coating layer 6 to the memory metal mesh.

[0032] In this embodiment, the end of the second hollow section 5 is connected to the collecting bag 8 through a quick connection structure. Generally speaking, the end of the second hollow section 5 is exposed outside the anus 1. The function of the collecting bag 8 is to collect feces. The quick connection structure can be that the end of the second hollow section 5 is sleeved on the bag opening 12 of the collecting bag 8 and fixed by a tightening member, and when replacing, it is only necessary to loosen the tightening member. In this embodiment, a combination of a tightening ring 9 and a nut 10 can be used. The tightening ring 9 has a stud spliced ​​at the head and tail. The tightening ring 9 is tightened by the nut 10 and the stud thread to make the end of the second hollow section 5 tightly sleeved on the bag opening 12. Or the bag opening 12 of the collecting bag 8 is set to a shape that is narrow at the top and wide at the bottom, and the end of the second hollow section 5 is directly sleeved on the bag opening 12. Or the end of the second hollow section 5 is set or increased to a rigid section such as a plastic tube, and the connection with the bag opening 12 is achieved by a buckle.

[0033] The method for using the postoperative leakage prevention device for rectal cancer is to insert the first hollow section 4 of the postoperative leakage prevention device for rectal cancer from the anus 1 into the rectum 2 to the inner side of the rectal anastomosis 3. The beginning of the second hollow section 5 is inserted into the inner side of the anastomosis 3 and the axial length distance C from the beginning to the anastomosis 3 is 0.5-2cm. When in use, the inner diameter of the anastomosis 3 is smaller than the outer diameter of the second hollow section 5 and because the first hollow section 4 supports the inner wall of the inner side of the anastomosis, the tension of the anastomosis 3 will not be increased, thereby avoiding the occurrence of anastomotic leakage. When inserted into the rectum 2, the device can be squeezed into a small volume at a low temperature and then inserted into the rectum 2. The temperature in the rectum 2 restores the original tubular structure of the memory metal mesh. When the insertion begins, a thin tube can be inserted into the device as an auxiliary insertion, and it can be pulled out after successful insertion.

[0034] The principle of the present invention is that the enlarged part at the upper end of the device, i.e., the first hollow section 4, is adapted to the inner diameter of the intestinal tube and fits tightly to the inner wall of the intestinal tube, and the feces in the intestine are discharged into the external collection bag through the device, thereby isolating the feces from the anastomosis, promoting the growth and healing of the anastomosis, and reducing the occurrence of anastomotic leakage.

[0035] The above embodiments are only for illustration rather than limitation of the present invention, so all equivalent changes or modifications made according to the method described in the scope of the present patent application are included in the scope of the present patent application.

Claims

1. A postoperative leakage prevention device for rectal cancer, characterized in that: Used to be inserted into the rectum after rectal cancer surgery; comprising a hollow hose, the hollow hose realizes axial expansion and contraction and universal bending through its own segment structure; starting from the direction of insertion into the rectum, it comprises a first hollow section and a second hollow section in sequence, the outer diameter of the first hollow section is larger than the outer diameter of the second hollow section, and the outer diameter of the second hollow section is smaller than the inner diameter of the rectal anastomosis; The hollow hose is formed by using a tubular body with a segmented structure formed by a memory metal mesh as a support and covered with a waterproof elastic coating layer; the tubular body with a segmented structure is formed by sequentially splicing a plurality of memory metal mesh circular ring segments with successively larger or smaller radii, and adjacent memory metal mesh circular ring segments have relative expansion and contraction margins; the adjacent memory metal mesh circular ring segments are movably connected by wires; The memory metal mesh is bonded and fixed to the waterproof elastic covering layer.

2. The postoperative leakage prevention device for rectal cancer according to claim 1, characterized in that: The first hollow section has an outer diameter of 2-5 cm and an axial length of 1-3 cm.

3. The postoperative leakage prevention device for rectal cancer according to claim 2, characterized in that: The outer diameter of the second hollow section is 1-3 cm, and the axial length is 5-15 cm.

4. The postoperative leakage prevention device for rectal cancer according to claim 1, characterized in that: The end of the second hollow section is connected with a collection bag via a quick connection structure.

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