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Integrated cobra-shaped biliary stent

A cobra, one-piece technology, applied in the field of one-piece cobra-shaped biliary stent, can solve problems such as non-detachment, and achieve the effects of avoiding discomfort, reducing the risk of bile leakage, and avoiding bile loss.

Active Publication Date: 2017-04-12
田明国 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the non-detachment of the existing integrated biliary stent and various defects of the existing self-falling biliary stent, the present invention provides an integrated cobra-shaped biliary stent, which is designed according to the anatomical structure and physiological characteristics of the human bile-pancreatic duct. Cobra shape, one end of the bracket is oblique S-shaped, the other end is α-shaped, and the middle is the drainage section

Method used

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  • Integrated cobra-shaped biliary stent

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Stent placement during common bile duct exploration. After taking out the stones under the choledochoscope, insert the guide wire to the distal opening of the common bile duct through the operating hole of the choledochoscope, and then insert the Figure 4 The integrated stent connected with the middle S-shaped structure and the push tube covers the guide wire and pushes it to the distal end of the common bile duct and the duodenum. After the guide wire and pusher are withdrawn, the elastic recovery of the stent is Figure 8 In the SJ shape, the common bile duct incision was closed with primary suture. After the operation, the stent can be pushed off by the chyme in the intestinal lumen or peristalsis after the bile is drained for a period of time.

Embodiment 2

[0031] The stent was retrogradely placed under duodenoscopy. Find the duodenal papilla under the microscope, insert the guide wire into the biliary tract through the operation hole, and then insert the Figure 4 The one-piece biliary stent connected with the middle α-shaped structure and the push tube covers the guide wire and is inserted through the operation hole of the duodenoscope, and the push tube is used to push the stent into the common bile duct. When the drainage section of the stent enters the biliary tract, push out the guide wire and guide tube, the stent returns to Figure 8 The SJ shape in.

Embodiment 3

[0033] The stent was placed through percutaneous transhepatic biliary puncture. Percutaneous transhepatic biliary puncture was performed under B-ultrasound positioning. After the puncture was successful, the guide wire was inserted through the puncture needle hole to the distal end of the bile duct, so that the guide wire passed through the stenosis and entered the duodenum. Withdraw the puncture needle, cover the guide wire with the dilation catheter from the body, push the dilation to the stricture of the liver parenchyma and bile duct, and withdraw the dilation catheter. Will Figure 4 The one-piece biliary stent connected with the middle α-shaped structure and the push tube covers the guide wire and pushes it into the common bile duct and the duodenum. Withdraw the guide wire, guiding tube and pusher, and the stent elastically returns to its JS shape. Since the α end is above the narrow section of the bile duct, and the S-shaped structure is weakly driven by intestinal pe...

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Abstract

The invention provides an integrated cobra-shaped biliary stent comprising a biliary stent body, a stent push pipe, a stent guiding pipe, and a stent protection casing pipe. The stent guiding pipe passes through the stent push pipe and the biliary stent body successively to connect a loop and a through hole pedestal into one. The stent protection casing pipe sleeves the top ends of the biliary stent body and the stent push pipe to protect the stent structure before usage. The biliary stent body is in an oblique S shape, the other end of the biliary stent body is in a shape like alpha, and the middle part of the biliary stent body serves as a drainage segment. Under guidance of a guide wire, the integrated biliary stent can pass through a choledochal duct cut, a T-shaped pipe sinus tract, and a percutaneous transhepatic biliary puncture sinus tract successively and then enters a biliary drainage part in a direct motion manner or can be placed into a biliary drainage part through a duodenoscope in a retrograde motion manner. The stent can fall automatically. Different stent drainage time can be obtained by selecting S-shaped structures with different radians according to clinic demands; and on the basis of the special S-shaped structure of the stent, a phenomenon that pancreatitis is caused because of pressing at a pancreiatic duct opening when the stent is discharged out of the biliary duct can be avoided.

Description

[0001] Technical field: [0002] The invention relates to a bracket for biliary drainage, which is an integrated cobra-shaped biliary bracket. Background technique [0003] In the surgical treatment of choledocholithiasis or endoscopic sphincterotomy, a biliary stent is often used to place the bile duct into the bile duct for bile drainage. Currently, the commonly used biliary stent is an integrated plastic stent, that is, the stent, the stent pushing tube and the stent. The guide tube is connected as a whole, and the stent can be retrogradely inserted into the duodenum and bile duct through the endoscope, or placed antegrade into the bile duct and duodenum through the surgical incision of the common bile duct. However, this one-piece plastic stent is hard and is fixed in the bile duct by the barbs at both ends, so it cannot fall off by itself. It needs to be taken out again through endoscopy after the purpose of treatment or prevention is achieved, which increases the pain of...

Claims

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Application Information

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IPC IPC(8): A61F2/856A61F2/97
Inventor 田明国田杨
Owner 田明国
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