Universal pancreatic duct stent

Abstract

The utility model discloses a universal pancreatic duct support. The universal pancreatic duct support comprises a conical support body. The cutting marks are arranged on the outer wall of the support body and used for marking different cutting positions; the positioning line is arranged on the stent body, extends in the length direction of the stent body and is used for developing under X rays. The universal pancreatic duct support is simple in structure, convenient to use and suitable for different patients with different pancreatic duct diameters, clinical requirements can be met to the maximum extent, operation efficiency is improved, pancreatic fistula is reduced, and postoperative complication risks of the patients are reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical technology, and in particular to a universal pancreatic duct stent. Background Technology

[0002] Pancreaticoduodenectomy, also known as Whipple's procedure, is a surgical treatment for diseases such as cancer of the middle and lower common bile duct, periampullary carcinoma, duodenal malignancies, early-stage pancreatic head cancer, and severe pancreatic and duodenal trauma. Pancreaticoduodenectomy involves the removal of multiple organs and multiple anastomoses (including pancreaticojejunostomy, choledochojejunostomy, and gastrojejunostomy), making pancreaticojejunostomy difficult to perform. The incidence of pancreatic fistula can reach 20%–40% postoperatively. Therefore, the surgery carries significant risks and a high complication rate. Pancreatic fistula is a serious complication, even leading to massive intra-abdominal hemorrhage and patient death. Surgeons have made numerous improvements to pancreaticojejunostomy techniques to address this complication. While the incidence of pancreatic fistula has decreased, it is difficult to completely eliminate it. Placing a pancreatic duct stent within the remaining pancreas and pancreatic duct is now a consensus in the field, facilitating drainage and reducing the occurrence of pancreatic fistula. The placement of a pancreatic duct stent can reduce the occurrence of pancreatic fistula, and the best results are achieved when a stent with the most suitable pancreatic duct diameter is used.

[0003] Currently, commonly used pancreatic duct stents (also known as pancreatic duct stent-supported drainage tubes) in clinical practice include: pediatric gastric tubes, infusion sets, scalp vein needles, indwelling needles, suction catheters, and even epidural catheters. However, these pancreatic duct stents have the following problems: 1. The distal and proximal diameters of the pancreatic duct stent are the same, which does not conform to the physiological structure of the pancreatic duct (from thin to thick, similar to a cone, as shown in the figure), making placement in the pancreatic duct difficult. 2. Patients have significant individual differences in their pancreatic ducts, and selecting a suitable pancreatic duct stent takes a long time. Sometimes, it takes 30-45 minutes to try various consumables, which may be consumed but not all suitable, greatly limiting the efficiency of the operation.

[0004] In addition, some pancreatic duct stents exist in existing technologies, such as the anti-slip and anti-pancreatic leakage pancreatic duct drainage device with patent number CN216798345U. This device has a conical pancreatic duct drainage tube with a narrow end opening as the drainage fluid inlet and a wide end opening as the drainage fluid outlet. The narrow end of the drainage tube has barbs and side holes. However, this device is not suitable for patients with different pancreatic duct diameters. A separate pancreatic duct diameter measuring tube is required to measure the pancreatic duct diameter, resulting in higher costs, more complicated operation, and reduced surgical efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems by providing a universal pancreatic duct stent with a simple structure, convenient use, and applicability to different patients with different pancreatic duct diameters. It can meet clinical needs to the greatest extent, improve surgical efficiency, reduce the occurrence of pancreatic fistula, and reduce the risk of postoperative complications.

[0006] To achieve the above-mentioned objectives of this utility model, this utility model provides a universal pancreatic duct stent, comprising: a tapered stent body; multiple cutting marks disposed on the outer wall of the stent body for identifying different cutting positions; and a positioning line disposed on the stent body and extending along its length for X-ray visualization.

[0007] Preferably, the positioning line is a medical barium line.

[0008] Preferably, the positioning lines are coated or adhered to the outer wall of the support body.

[0009] Preferably, the cutting mark includes a scale marking line coated or pasted on the outer wall of the support body for marking the diameter at the corresponding part of the support body.

[0010] Preferably, the cutting mark further includes an easy-to-cut structure arranged around the periphery of the support body along the scale marking line.

[0011] Preferably, the easy-to-cut structure is a point-break structure used to connect the portions of the bracket body located on both sides of the cut mark.

[0012] Preferably, the stent body is a single-layer stent tube or a double-layer stent tube, wherein the double-layer stent tube includes an inner stent tube and an outer stent tube fitted outside the inner stent tube.

[0013] Preferably, the scale markings are disposed on the outer support tube.

[0014] Preferably, the easily cut structure is disposed on the outer support tube and the inner support tube and the positions are corresponding.

[0015] Preferably, it also includes a positioning hole disposed on the outer support tube and close to the easily cuttable structure.

[0016] Preferably, it also includes one or more drainage holes disposed on the portion of the support body separated by an easily cuttable structure and near the smaller end of the diameter.

[0017] Compared with the prior art, the universal pancreatic duct stent of this utility model has the following advantages:

[0018] 1. The universal pancreatic duct stent of this utility model has a simple structure, is easy to use, and is suitable for different patients with different pancreatic duct diameters. It can meet clinical needs to the greatest extent, improve surgical efficiency, reduce the occurrence of pancreatic fistula, and reduce the risk of postoperative complications for patients.

[0019] 2. The universal pancreatic duct stent of this utility model has multiple cutting marks on the outer wall of the stent body to mark different cutting positions. When using it, the stent body can be cut at the corresponding cutting mark according to the diameter of the patient's pancreatic duct to select the required stent part, which makes it more convenient to use and can be applied to different patients with different pancreatic duct diameters. Compared with the existing technology, which requires 30-45 minutes to try various consumables, it greatly improves the efficiency of the operation.

[0020] 3. The universal pancreatic duct stent of this utility model has a positioning line extending along its length on the stent body for X-ray visualization. This facilitates rapid positioning of the stent during postoperative X-ray follow-up examinations, enabling doctors to quickly assess the placement effect of the pancreatic duct stent and take timely measures to promote the patient's early recovery.

[0021] 4. The universal pancreatic duct stent of this utility model has a drainage hole set near the smaller diameter end of the stent body, which improves the drainage effect.

[0022] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first structure of the general-purpose pancreatic duct stent of this utility model;

[0024] Figure 2 This is a schematic diagram of the second structure of the general-purpose pancreatic duct stent of this utility model;

[0025] Figure 3 This is a schematic diagram of the third structure of the general-purpose pancreatic duct stent of this utility model;

[0026] Figure 4 This is a front view of the outer support tube of this utility model;

[0027] Figure 5 This is a perspective view of the first structure of the outer support tube of this utility model;

[0028] Figure 6 This is a perspective view of the second structure of the outer support tube of this utility model;

[0029] Figure 7 This is a perspective view of the third structure of the outer support tube of this utility model;

[0030] Figure 8 This is a perspective view of the fourth structure of the outer support tube of this utility model;

[0031] Figure 9 This is a perspective view of the fifth structure of the outer support tube of this utility model. Detailed Implementation

[0032] like Figures 1-3 The figures show different structural schematic diagrams of the universal pancreatic duct stent of this utility model. As can be seen from the figures, the universal pancreatic duct stent of this utility model includes: a conical stent body 1; multiple cutting marks on the outer wall of the stent body for marking different cutting positions; and a positioning line 2 on the stent body and extending along its length for X-ray imaging.

[0033] Specifically, the stent body of this utility model is a tapered tube with a length of 30cm-45cm, and a through hole in the center for connecting to the pancreatic duct to facilitate drainage. The inner diameter of the small end is 0.5mm, and the inner diameter of the large end is 5mm, and the wall thickness of the small end is less than that of the large end (for reference). Figure 3 , Figure 4 ).

[0034] Multiple cutting marks are provided on the outer wall of the stent body to mark different cutting positions. These cutting marks include scale lines 3 coated or pasted on the outer wall of the stent body to mark the diameter of corresponding locations on the stent body. Furthermore, the cutting marks may also include an easy-cutting structure 4 arranged around the outer periphery of the stent body along the scale lines. This easy-cutting structure is a point-break structure used to connect the portions of the stent body located on both sides of the cutting marks. The point-break structure can refer to existing point-break structures that facilitate the breaking of an object in the middle, and will not be described in detail here.

[0035] In this invention, cutting marks are set on the outer wall of the stent body at positions corresponding to inner diameters of 0.5mm, 0.8mm, 1mm, 2mm, 3mm, etc., so that the stent body can be cut during the operation according to the thickness of the patient's pancreatic duct and the size of the pancreatic duct as assessed by CT scan. The required stent drainage length and the appropriate cutting marks that match the inner diameter of the pancreatic duct can be selected comprehensively.

[0036] The stent body of this invention is 30cm-45cm in length, ensuring sufficient extensibility for clinical use (the standard clinical length is 10cm). The smaller end (relative to the smaller end of the stent diameter) is used as the stent tail region, and the larger end (relative to the larger end of the stent diameter) is used as the stent head region. This stent is inserted between the pancreatic duct and the intestinal tract (the smaller end is inserted into the pancreatic duct, and the larger end into the intestinal tract). The stent body length is longer than the required insertion length, resulting in a smaller diameter gradient. It can be cut at any graduation line, and the diameter difference between the two ends after cutting is small. Furthermore, it conforms to the physiological state of the conical pancreatic duct, facilitating better anastomosis between the pancreatic duct and the intestinal tract after insertion.

[0037] To facilitate rapid stent positioning during postoperative X-ray follow-up examinations, enabling doctors to quickly assess the placement effect of the pancreatic duct stent and take timely measures to promote early patient recovery, this invention includes a positioning line extending along the length of the stent body for clear visualization under X-ray. This positioning line can be made of medical barium wire and fixed to the outer wall of the stent body by coating or adhesive, or it can be fixed to the outer wall of the stent body using other methods available in the prior art.

[0038] Furthermore, this utility model can provide a positioning hole 7 on the support body near the easily cut structure (see reference). Figure 7 , Figure 8 As shown, the positioning hole is located on the side of the stent body near the large end of the stent. In use, the stent tube can be sewn onto the intestinal tube and fixed by passing a medical surgical suture through the positioning hole.

[0039] To facilitate the fixation of the stent to the intestinal tract, an easy-break structure can be provided on both sides of the positioning hole near the position of the stent tube. The easy-break structure can be an existing point-break structure. The corresponding part of the stent tube can be cut open through the easy-break structure, and the part of the stent tube with the positioning hole can be folded over to make it easier to fix the stent tube to the intestinal tract.

[0040] Furthermore, one or more drainage holes can be provided on the portion of the support body separated by the easily cuttable structure, near the smaller diameter end, with the multiple drainage holes spaced apart along the axial direction of the support body (see [reference]). Figure 9 (The diagram shows two drainage holes, each approximately 2mm in diameter, with a distance of about 5mm between adjacent holes.) These drainage holes enhance the drainage effect. Furthermore, the drainage holes can also be spaced out along the circumference of the support body.

[0041] The support body of this utility model can be a single-layer support tube or a double-layer support tube. Preferably, it adopts the following... Figure 3 The double-layer support tube shown includes an inner support tube 5 and an outer support tube 6 that is fitted over and can be attached to the inner support tube.

[0042] When using double-layer support tubes, such as Figure 3 , Figure 4 As shown, the wall thickness at the large end of the outer support tube is greater than that at the small end, while the inner support tube can be a tube with the same wall thickness. The graduation marks are located on the outer support tube (e.g., ...). Figure 5 As shown), the positioning line is also set on the outer support tube (of course, it can also be set on the inner support tube).

[0043] Furthermore, an easily cuttable structure 4 can be provided circumferentially at the position corresponding to the scale mark line on the outer support tube (e.g., Figure 6As shown in the diagram, correspondingly, easy-cut structures are also provided circumferentially at the locations corresponding to the easy-cut structures on the inner and outer support tubes. This allows the inner and outer support tubes to be cut simultaneously at the easy-cut structures as needed during use.

[0044] Furthermore, this utility model can also provide a positioning hole 7 (e.g., near the easily cut structure) on the outer support tube. Figure 7 , Figure 8 As shown, the positioning hole is located on the side of the outer stent tube near the larger diameter end. In use, the outer stent tube can be sewn onto the intestinal tube by passing a medical surgical suture through the positioning hole.

[0045] To facilitate the fixation of the stent to the intestinal tract, a breakable structure 8 can be made on both sides of the positioning hole near the position of the easy-to-cut structure of the outer stent tube. This is a point-breakable structure. By cutting the corresponding part of the easy-to-cut structure of the outer stent tube, it is easy for the outer stent tube to be folded relative to the inner stent tube. While the outer stent tube is conveniently fixed to the intestinal tract by passing medical surgical suture through the positioning hole, the corresponding part of the inner stent tube and the outwardly folded part of the outer stent tube can continue to extend into the intestine, preventing the drained pancreatic juice from flowing out of the intestine.

[0046] Furthermore, one or more drainage holes 9 can be provided on the portion of the outer and inner support tubes separated by the easily cuttable structure, near the smaller diameter end. Multiple drainage holes can be spaced apart axially along the outer and inner support tubes (see [reference]). Figure 9 (The diagram shows two drainage holes, each approximately 2mm in diameter, with a distance of about 5mm between adjacent holes.) Furthermore, drainage holes can be spaced apart along the circumference of both the outer and inner support tubes. The drainage holes on the inner and outer support tubes also form a connecting hole.

[0047] During manufacturing, the support structure of this utility model can be made of either absorbable or non-absorbable materials.

[0048] As can be seen, this utility model's universal pancreatic duct stent can be used as a pancreatic duct stent in various pancreaticojejunostomy surgeries. Its conical shape conforms to the pancreatic duct, and the quantified stent inner diameter markings (i.e., scale markings) facilitate measurement of the human pancreatic duct size and allow for selection of the required stent diameter based on actual conditions, with the remaining portion easily cut off and discarded. During follow-up, the barium line on the stent allows for clear visualization of the stent via X-ray, enabling doctors to quickly assess the placement effect and take timely action in case of complications. This utility model stent has a wide range of applications, not only solving the drainage problem in pancreaticojejunostomy surgeries and reducing postoperative complications, but also saving patients money compared to existing technologies. It addresses clinical pain points and needs, possessing strong practicality and high applicability, and achieving excellent technical results.

[0049] Although the present invention has been described in detail above, it is not limited thereto. Those skilled in the art can make modifications based on the principles of the present invention. Therefore, all modifications made in accordance with the principles of the present invention should be understood as falling within the protection scope of the present invention.

Claims

1. A universal pancreatic duct stent, characterized in that, include: The support body is conical in shape; Multiple cutting marks are set on the outer wall of the support body to identify different cutting positions; Positioning lines for X-ray imaging are set on the support body and extend along its length.

2. The universal pancreatic duct stent according to claim 1, characterized in that, The positioning line is a medical barium line.

3. The universal pancreatic duct stent according to claim 1 or 2, characterized in that, The positioning lines are coated or pasted onto the outer wall of the support body.

4. The universal pancreatic duct stent according to claim 1, characterized in that, The cutting marks include scale marking lines coated or pasted on the outer wall of the stent body for marking the diameter at the corresponding location on the stent body.

5. The universal pancreatic duct stent according to claim 4, characterized in that, The cutting mark also includes an easy-cutting structure that is arranged around the outer periphery of the support body along the scale mark line.

6. The universal pancreatic duct stent according to claim 5, characterized in that, The easily cut structure is a point-break structure used to connect the portions of the bracket body located on both sides of the cut mark.

7. The universal pancreatic duct stent according to claim 6, characterized in that, The stent body is a single-layer stent tube or a double-layer stent tube. The double-layer stent tube includes an inner stent tube and an outer stent tube that is fitted outside the inner stent tube.

8. The universal pancreatic duct stent according to claim 7, characterized in that, The scale markings are set on the outer support tube.

9. The universal pancreatic duct stent according to claim 7, characterized in that, The easily cuttable structure is disposed on the outer support tube and the inner support tube and is positioned correspondingly.

10. The universal pancreatic duct stent according to claim 7, characterized in that, It also includes positioning holes disposed on the outer support tube and near the easily cuttable structure.

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