Cyathiform stone removing mesh basket with ball bag

Abstract

The invention relates to the technical field of medical apparatus and instruments, in particular to a cyathiform stone removing mesh basket with a ball bag for an endoscopic retrograde cholangiopancreatography. The cyathiform stone removing mesh basket comprises a cyathiform mesh basket body, a snare, the ball bag, an outer cannula and an inner cannula. The inner cannula is a double-cavity pipe and comprises a pipe cavity I and a pipe cavity II. A metal connecting rod of the cyathiform mesh basket body is wrapped with the inner cannula. A connecting rod of the snare passes through the interiorof the pipe cavity I of the inner cannula, and the head end of the connecting rod is in an inverted-L shape. A ball bag catheter passes through the pipe cavity II of the inner cannula, is a double-cavity catheter and comprises a pipe cavity III and a pipe cavity IV. The pipe cavity III communicates with the ball bag at the head end of the ball bag catheter. A zebra guide wire passes through the pipe cavity IV. The snare is in an 8 shape and divided into two rings, wherein the larger ring is connected with an opening of the cyathiform mesh basket body, and the smaller ring penetrates through the ball bag catheter. The cyathiform stone removing mesh basket can be widely popularized in the fields such as therapeutic endoscopy of extrahepatic bile duct stone.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a cup-shaped stone extraction basket with a balloon for endoscopic retrograde cholangiopancreatography. Background technique [0002] Extrahepatic bile duct stones are a common and frequently-occurring disease in my country. With the continuous development of endoscopic technology and the continuous improvement of accessories, extrahepatic bile duct stones are usually removed by endoscopic retrograde cholangiopancreatography (ERCP). Compared with traditional laparotomy or modern laparoscopic biliary tract exploration, ERCP has the advantages of less trauma, high safety factor, and faster recovery. [0003] At present, the consumables for ERCP stone removal are mainly stone removal balloon and stone removal mesh basket. Smaller stones are often removed through the balloon, and stones with a diameter of more than 1 cm are usually removed by the mesh basket. The stone extra...

AI Technical Summary

Problems solved by technology

The stone extraction baskets for clinical application are all wire-woven baskets, the head and tail ends of the basket are fixed, and the released baskets are oval or spindle-shaped. The above-mentioned stone extraction baskets have the following disadvantages: 1. Push the basket so that the stones enter the basket through the side holes of the basket, and the success rate of removing stones at one time is low; 2. The side holes of the basket are large, and the stones can overflow through the side holes of the basket during the process of tightening the basket , leading to the failure of stone removal; 3. When the common bile duct does not expand or the stone is large, the basket cannot be released, and it is difficult to remove the stone successfully; 4. If the stone is too large to be removed by ERCP, it is difficult to remove the stone. It is released from the basket, which leads to a dilemma in ERCP stone removal. Once the above situation occurs, the duodenoscope can only be converted to laparotomy before the stone can be removed and the duodenoscope can be withdrawn.

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