Disposable biliary stent

Abstract

The invention relates to the technical field of medical instruments, and discloses a disposable biliary tract stent which comprises a conveying system, and the conveying system is used for observing and positioning the affected part of the liver and gall of a patient, conveying a stent assembly to the affected part of the liver and gall of the patient and then placing the stent assembly, and taking out the conveying system after the stent assembly is placed. According to the disposable biliary tract stent, the edge shadow block, the middle line shadow block and the middle shadow block are arranged, so that the placement position of the stent sleeve can be accurately positioned through an X-ray machine during use, the stent sleeve is placed at the accurate position and then expanded, and the supporting effect of the stent sleeve on the narrow part of the biliary tract is ensured; under the action of the supporting ring, the narrow part of the biliary tract and the stent sleeve can be supported in a contact mode, the phenomenon that the middle of the stent sleeve collapses when the stent sleeve is used for a long time is avoided, the service life of the stent sleeve is prolonged, meanwhile, the number of times of replacing the stent sleeve by a patient is reduced, and the psychological pressure and economic pressure of the patient are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a disposable biliary stent. Background Art

[0002] The intrahepatic bile duct starts from the capillary bile duct, gradually merges into larger bile ducts, and finally merges into the left and right hepatic ducts, which exit the liver from the porta hepatis. The left and right hepatic ducts merge into the common duct after leaving the liver; the common hepatic duct and the cystic duct merge into the common bile duct, which opens into the duodenal papilla at the left posterior wall of the descending duodenum and then merges with the pancreatic duct. There is a circular sphincter around the opening of the common bile duct, called the sphincter of Oddi, which can control the discharge of bile. After the common bile duct or the common hepatic duct is blocked, bile cannot be excreted, which can cause obstructive jaundice; the biliary system has the functions of secreting, storing, concentrating and transporting bile, and plays an important regulatory role in the discharge of bile into the duodenum. Malignant biliary obstruction caused by malignant tumors such as cholangiocarcinoma, liver cancer, pancreatic cancer and metastatic cancer has a high incidence rate and is often discovered in the late stage. Implanting a biliary stent into the stenotic or obstructed area is a good way to treat biliary obstruction.

[0003] After the existing disposable biliary stent is placed in the patient's bile duct, the placement position of the stent can only be observed through an endoscope, which makes it difficult to place it accurately. In addition, the stent is prone to collapse at the contact point with the stricture of the bile duct during use, thereby affecting the flow of bile. The stent needs to be replaced frequently, which adds psychological and economic burdens to patients. Most of the existing biliary stents are set as an integral whole and their length cannot be adjusted, which has poor practicality. For this reason, we propose a disposable biliary stent. Summary of the invention

[0004] The purpose of the present invention is to provide a disposable biliary stent to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a disposable biliary stent, comprising: The delivery system is used to observe and locate the patient's hepatobiliary affected area, and to deliver the stent assembly to the patient's hepatobiliary affected area for placement. After the stent assembly is placed, the delivery system is removed; The stent assembly is limited on the conveying assembly in the conveying system, and is delivered to the patient's liver and gallbladder affected area by the conveying system to support the narrow part of the patient's liver and gallbladder ducts so that the patient's bile can flow normally in the ducts.

[0006] Preferably, the bracket assembly includes a bracket line, and the bracket line is combined into a tubular bracket sleeve, and the bracket sleeve is sleeved on the conveying assembly of the conveying system, and the edges of both ends of the bracket sleeve are fixedly connected with edge shadow blocks, the middle of both ends of the bracket sleeve is fixedly connected with a midline shadow block, and the middle of the bracket sleeve is fixedly connected with a middle shadow block.

[0007] Preferably, a support ring is fixedly connected to the outside of the bracket sleeve, and two support rings are provided, and the two support rings are symmetrically distributed on the left and right sides of the bracket sleeve.

[0008] Preferably, the width of the support ring is set to 2 mm, the thickness of the support ring is set to 0.5 mm, and the distance between the two support rings is 2 / 1 of the total length of the bracket sleeve.

[0009] Preferably, a fixing block 1 is fixedly connected to the left side of the bracket line, a protrusion is fixedly connected to the left side of the fixing block 1, a fixing block 2 is fixedly connected to the right side of the bracket line, a groove is opened on the right side of the fixing block 2, and the left side of the protrusion is located inside the groove.

[0010] Preferably, a clamping block is fixedly connected to the outer side of the protrusion, a clamping slot is provided on the inner side of the groove, and the clamping block is located on the inner side of the clamping slot.

[0011] Preferably, the shapes of the clamping blocks and the clamping slots are both configured to be barb-shaped, the clamping blocks are evenly spaced and distributed on the outside of the protrusion, and the clamping slots are evenly spaced and densely distributed on the inside of the groove.

[0012] Preferably, a covering film is fixedly connected to the outside of the stent circuit, the thickness of the covering film is set to 0.2 mm, and the stent circuit is made of a memory alloy nickel-titanium alloy.

[0013] Preferably, the delivery system includes an endoscopic observation module, the output end signal of the endoscopic observation module is connected to the affected part imaging module, the output end signal of the affected part imaging module is connected to the affected part measurement module, the output end signal of the affected part measurement module is connected to the stent delivery module, the output end signal of the stent delivery module is connected to the position determination module, the output end signal of the position determination module is connected to the constraint cancellation module, and the output end signal of the constraint cancellation module is connected to the tool withdrawal module.

[0014] Preferably, the endoscopic observation module refers to inserting an endoscope into the patient's liver and gallbladder, observing and locating the patient's affected part through the endoscope and X-ray machine, inserting a catheter into the patient's affected part, injecting an appropriate amount of contrast agent into the affected part duct, measuring the size of the affected part through the inserted catheter, and the stent delivery module delivers the stent sleeve to the affected part, and after removing the constraint of the stent sleeve, the stent sleeve expands to prop up the narrow hepatobiliary duct, and then withdraws the tool.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The disposable biliary stent is provided with edge shadow blocks, midline shadow blocks and middle shadow blocks. When in use, the placement position of the stent sleeve can be accurately located by an X-ray machine, and it can be expanded after being placed in the correct position, thereby ensuring the supporting effect of the stent sleeve on the stenosis of the bile duct. In addition, under the action of the support ring, the stenosis of the bile duct can be supported in contact with the stent sleeve, thereby avoiding the phenomenon of collapse in the middle of the stent sleeve during long-term use, thereby increasing the service life of the stent sleeve, reducing the number of times the patient needs to replace the stent sleeve, and reducing the patient's psychological and economic pressures.

[0016] The disposable biliary stent can adjust the length of the stent sleeve by setting the protrusions, grooves, blocks and slots, and the length of the stent sleeve can be spliced ​​according to actual needs, so that the length of the stent sleeve can be adjusted according to the length of the patient's bile duct during hepatobiliary surgery, thereby avoiding the phenomenon of the stent sleeve being too short or too long, affecting the supporting effect on the bile duct, and has good practicality. In addition, under the action of the delivery system, the stent sleeve can be accurately delivered to the appropriate position of the patient's bile duct, thereby improving the installation efficiency of the stent sleeve, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front side of the overall structure of the present invention; Figure 2 It is a partial cross-sectional schematic diagram of the stent of the present invention; Figure 3 It is a partial cross-sectional schematic diagram of the support line of the present invention; Figure 4 for Figure 3 The enlarged structural diagram at A in the middle; Figure 5 Schematic diagram of the conveying system of the present invention.

[0018] In the figure: 1. Conveying system; 101. Endoscopic observation module; 102. Affected part angiography module; 103. Affected part measurement module; 104. Stent conveying module; 105. Position determination module; 106. Constraint cancellation module; 107. Tool withdrawal module; 2. Stent assembly; 201. Edge shadow block; 202. Centerline shadow block; 203. Stent line; 204. Covering film; 205. Support ring; 206. Middle shadow block; 207. Fixed block one; 208. Bump; 209. Slot; 210. Block; 211. Groove; 212. Fixed block two. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention provides the following technical solutions: See also Figure 1-5 , disposable biliary stent, including: The delivery system 1 is used to observe and locate the affected part of the liver and gallbladder of the patient, and to deliver the stent assembly 2 to the affected part of the liver and gallbladder of the patient for placement, and then take out the delivery system 1 after the stent assembly 2 is placed; The support assembly 2 is limited on the conveying assembly in the conveying system 1, and is conveyed by the conveying system 1 to the patient's liver and gallbladder affected area to support the narrow part of the patient's liver and gallbladder ducts so that the patient's bile can flow normally in the ducts.

[0021] The stent assembly 2 includes a stent line 203, which is combined into a tubular stent sleeve. The stent sleeve is sleeved on the conveying assembly of the conveying system 1. The edges of both ends of the stent sleeve are fixedly connected with edge shadow blocks 201, the middle of both ends of the stent sleeve are fixedly connected with centerline shadow blocks 202, and the middle of the stent sleeve is fixedly connected with middle shadow blocks 206. By setting the edge shadow blocks 201, the centerline shadow blocks 202 and the middle shadow blocks 206, the placement position of the stent sleeve can be accurately located by an X-ray machine during use, and it can be expanded after being placed in the exact position to ensure the supporting effect of the stent sleeve on the stenosis of the bile duct.

[0022] Furthermore, a support ring 205 is fixedly connected to the outside of the stent sleeve. Two support rings 205 are provided, and the two support rings 205 are symmetrically distributed on the left and right sides of the stent sleeve. Under the action of the support ring 205, the stenosis of the bile duct and the contact with the stent sleeve can be supported, avoiding the phenomenon of collapse in the middle of the stent sleeve during long-term use, thereby improving the service life of the stent sleeve.

[0023] Furthermore, the width of the support ring 205 is set to 2 mm, the thickness of the support ring 205 is set to 0.5 mm, and the distance between the two support rings 205 is 2 / 1 of the total length of the stent sleeve, ensuring that the covering film 204 is located at the stenosis of the bile duct.

[0024] Furthermore, a fixing block 207 is fixedly connected to the left side of the bracket circuit 203, a protrusion 208 is fixedly connected to the left side of the fixing block 207, and a fixing block 212 is fixedly connected to the right side of the bracket circuit 203. A groove 211 is provided on the right side of the fixing block 212, and the left side of the protrusion 208 is located on the inner side of the groove 211. Under the action of the fixing block 1 207 and the fixing block 212, the two groups of bracket circuits 203 can be spliced.

[0025] Furthermore, a clamping block 210 is fixedly connected to the outer side of the protrusion 208, a clamping slot 209 is opened inside the groove 211, and the clamping block 210 is located inside the clamping slot 209. Under the action of the clamping block 210 and the clamping slot 209, the fixed block 1 207 and the fixed block 2 212 can be limited.

[0026] Furthermore, the shapes of the block 210 and the slot 209 are both set to be barb-shaped, the block 210 is evenly spaced outside the protrusion 208, and the slots 209 are evenly spaced and densely distributed inside the groove 211. The barb-shaped setting facilitates the protrusion 208 to enter the groove 211.

[0027] Furthermore, a covering film 204 is fixedly connected to the outside of the stent circuit 203, and the thickness of the covering film 204 is set to 0.2 mm. The stent circuit 203 is made of a memory alloy nickel-titanium alloy, and the memory alloy nickel-titanium alloy can ensure the stability of the stent sleeve.

[0028] Furthermore, the delivery system 1 includes an endoscopic observation module 101, the output end signal of the endoscopic observation module 101 is connected to the affected part imaging module 102, the output end signal of the affected part imaging module 102 is connected to the affected part measurement module 103, the output end signal of the affected part measurement module 103 is connected to the stent delivery module 104, the output end signal of the stent delivery module 104 is connected to the position determination module 105, the output end signal of the position determination module 105 is connected to the constraint cancellation module 106, and the output end signal of the constraint cancellation module 106 is connected to the tool withdrawal module 107.

[0029] Furthermore, the endoscopic observation module 101 refers to inserting an endoscope into the patient's liver and gallbladder, observing and locating the patient's affected part through the endoscope and X-ray machine, inserting a catheter into the patient's affected part, injecting a proper amount of contrast agent into the affected part duct, measuring the size of the affected part through the inserted catheter, and the stent delivery module 104 delivers the stent sleeve to the affected part, and after removing the constraint of the stent sleeve, the stent sleeve expands to prop up the narrow hepatobiliary duct, and then withdraws the tool.

[0030] During actual operation, when this device is used, carefully take out the delivery system 1 from the package and thoroughly check whether the product is intact, then insert the endoscope from the patient's mouth into the patient's bile duct, observe the specific position of the affected part through the endoscopic observation module 101, and then insert the guide wire into the patient's bile duct, determine its specific position through the guide wire, and then inject contrast agent into the patient's bile duct through the affected part imaging module 102, determine the shape of the patient's bile duct stenosis with the cooperation of the X-ray machine, and deliver the stent sleeve to the appropriate position of the patient's bile duct through the stent delivery module 104. The position of the stent sleeve can be determined by the edge shadow block 201, the midline shadow block 202 and the middle shadow block 206. After placement, the stent sleeve can be expanded through the constraint cancellation module 106. After expansion, the corresponding tool is withdrawn, and the bile flows in the bile duct conveniently under the support of the stent sleeve.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A disposable biliary stent, characterized in that: include: A delivery system (1), the delivery system (1) is used to observe and locate the affected part of the patient's liver and gallbladder, and to deliver the stent assembly (2) to the affected part of the patient's liver and gallbladder for placement; after the stent assembly (2) is placed, the delivery system (1) is removed; The support assembly (2) is limited on the conveying assembly in the conveying system (1), and is conveyed by the conveying system (1) to the affected part of the patient's liver and gallbladder to support the narrowed part of the patient's liver and gallbladder duct, so that the patient's bile can flow normally in the duct.

2. The disposable biliary stent according to claim 1, characterized in that: The support assembly (2) comprises a support line (203), the support line (203) being combined into a tubular support sleeve, the support sleeve being sleeved on the conveying assembly of the conveying system (1), edge shadow blocks (201) being fixedly connected to the edges of both ends of the support sleeve, midline shadow blocks (202) being fixedly connected to the middle of both ends of the support sleeve, and a middle shadow block (206) being fixedly connected to the middle of the support sleeve.

3. The disposable biliary stent according to claim 1, characterized in that: A support ring (205) is fixedly connected to the outside of the bracket sleeve, and two support rings (205) are provided, and the two support rings (205) are symmetrically distributed on the left and right sides of the bracket sleeve.

4. The disposable biliary stent according to claim 3, characterized in that: The width of the support ring (205) is set to 2 mm, the thickness of the support ring (205) is set to 0.5 mm, and the distance between the two support rings (205) is 2 / 1 of the total length of the bracket sleeve.

5. The disposable biliary stent according to claim 1, characterized in that: The left side of the bracket line (203) is fixedly connected to a fixing block 1 (207), the left side of the fixing block 1 (207) is fixedly connected to a protrusion (208), the right side of the bracket line (203) is fixedly connected to a fixing block 2 (212), the right side of the fixing block 2 (212) is provided with a groove (211), and the left side of the protrusion (208) is located inside the groove (211).

6. The disposable biliary stent according to claim 5, characterized in that: A clamping block (210) is fixedly connected to the outer side of the protrusion (208), a clamping slot (209) is provided on the inner side of the groove (211), and the clamping block (210) is located on the inner side of the clamping slot (209).

7. The disposable biliary stent according to claim 6, characterized in that: The shapes of the clamping blocks (210) and the clamping slots (209) are both configured to be barb-shaped; the clamping blocks (210) are evenly spaced and distributed outside the protrusion (208); and the clamping slots (209) are evenly spaced and densely distributed inside the groove (211).

8. The disposable biliary stent according to claim 1, characterized in that: A covering film (204) is fixedly connected to the outside of the support circuit (203); the thickness of the covering film (204) is set to 0.2 mm; and the support circuit (203) is made of a memory alloy nickel-titanium alloy.

9. The disposable biliary stent according to claim 1, characterized in that: The delivery system (1) comprises an endoscopic observation module (101); an output end signal of the endoscopic observation module (101) is connected to an affected part angiography module (102); an output end signal of the affected part angiography module (102) is connected to an affected part measurement module (103); an output end signal of the affected part measurement module (103) is connected to a stent delivery module (104); an output end signal of the stent delivery module (104) is connected to a position determination module (105); an output end signal of the position determination module (105) is connected to a constraint cancellation module (106); and an output end signal of the constraint cancellation module (106) is connected to a tool withdrawal module (107).

10. The disposable biliary stent according to claim 1, characterized in that: The endoscopic observation module (101) is a module that inserts an endoscope into the patient's liver and gallbladder, observes and locates the patient's affected area through the endoscope and an X-ray machine, inserts a catheter into the patient's affected area, injects an appropriate amount of contrast agent into the affected area, and measures the size of the affected area through the inserted catheter. The stent delivery module (104) delivers the stent sleeve into the affected area, and after removing the constraint of the stent sleeve, the stent sleeve expands to prop up the narrow liver and gallbladder duct, and then withdraws the tool after propping up.

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