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 desi

Method used

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  • Integrated cobra-shaped biliary stent
  • Integrated cobra-shaped biliary stent
  • Integrated cobra-shaped biliary stent

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] A stent is placed during the exploration of the common bile duct. After removing the stones under the choledochoscope, insert the guide wire into the distal opening of the common bile duct through the operation hole of the choledochoscope, and then Figure 4 The integrated stent connected with the middle S-shaped structure and the push tube covers the guide wire and pushes to the distal end of the common bile duct and the duodenum. After the guide wire and the pusher are withdrawn, the stent elastically returns to Figure 8 In the SJ shape, the common bile duct incision is closed with primary suture. The postoperative stent can be pushed off by intestinal chyme or intestinal peristalsis after a period of time after the bile has been drained.

Example Embodiment

[0030] Example 2

[0031] Place the stent retrogradely under duodenoscope. Find the duodenal papilla under the microscope, insert the guide wire into the biliary tract through the operating hole, and then Figure 4 The integrated biliary stent with the middle α-shaped structure connected to the push tube covers the guide wire and inserts it through the duodenoscope operation hole. The push tube pushes the stent into the common bile duct. When the drainage section of the stent enters the biliary tract, the guide wire is pushed out And guide tube, the stent returns to Figure 8 SJ shape in.

Example Embodiment

[0032] Example 3

[0033] The stent is placed by percutaneous transhepatic biliary puncture. Percutaneous transhepatic biliary puncture under B-ultrasound positioning. After successful puncture, the guide wire is inserted into the distal end of the bile duct through the puncture needle hole, so that the guide wire passes through the stenosis and enters the duodenum. Withdraw the puncture needle, and push the dilation catheter from the body over the guide wire to the liver parenchyma and the stenosis of the bile duct, and exit the dilation catheter. will Figure 4 An integrated biliary stent with a middle α-shaped structure connected with the push tube covers the guide wire and pushes into the common bile duct and duodenum. Withdraw the guide wire, guide tube and pusher, the stent elastically returns to its JS shape, because the α end is above the narrow segment of the bile duct, and the S-shaped structure is weakly driven by intestinal peristalsis and chyme in the duodenum. The...

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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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