Lithotripsy basket catheter

Abstract

The invention provides a lithotripsy basket catheter, which comprises a catheter and a connecting rod type basket arranged in the catheter. A metal connecting rod channel and a contrast agent / guide wire channel are arranged in the catheter, and a first lithotripsy electrode and a second lithotripsy electrode are further arranged in the catheter. The first lithotripsy electrode, the second lithotripsy electrode, the metal connecting rod channel for displacement and the liquid injection channel body part are parallel to one another and do not make contact with one another. The basket comprises four metal wires, the metal connecting rod and a basket connecting rod connected to the tail end of the metal connecting rod, and a basket handle is connected to the tail of the basket connecting rod.The basket metal wires penetrate out of the side wall of the catheter, so that the distance between the basket metal wires is constant, basket deformation can be avoided, and calculi are easy to takeout. After calculi are taken out of the basket, the basket is tightened, and the calculi can be fixed and tightly attached to the lithotripsy electrodes at the head end of the catheter. And it is notnecessary to use a choledochoscope for assistance, and the lithotripsy basket catheter is more suitable for primary hospitals and is low in cost and convenient to popularize.

Description

technical field [0001] The invention relates to the technical field of bile duct medical devices, in particular to a gravel mesh basket catheter. Background technique [0002] Choledocholithiasis is a common and frequently-occurring disease in my country. Blockage of the common bile duct by stones can induce complications such as acute cholangitis, obstructive jaundice, and acute biliary pancreatitis. Symptoms include chills, fever, abdominal pain, and jaundice. Cause shock, long-term calculus stimulation has the risk of cholangiocarcinoma, which is an important disease that endangers human health. The current treatment options for choledocholithiasis include open biliary tract exploration, laparoscopic biliary exploration, endoscopic retrograde cholangiopancreatography (ERCP) stone extraction, percutaneous transhepatic bile duct puncture (PTCD) + fistula dilation + percutaneous transhepatic biliary tract Endoscopic (PTCS) stone extraction, duodenal papillary balloon dilatio...

AI Technical Summary

Problems solved by technology

The head end of the above-mentioned technique has the following disadvantages: 1. Before the stone is completely removed, the risk of large papillary sphincter incision and large balloon papillary expansion is relatively high, and short-term complications such as nipple hemorrhage, acute pancreatitis, and perforation are prone to occur during the perioperative period. And long-term complications such as reflux cholangitis, early recurrence of stones, and cholangitis; 2. Huge common bile duct stones often cause common bile duct obstruction. Due to the narrow space, it is difficult to remove huge common bile duct stones by placing a stone basket through ERCP ;3. The efficiency of mechanical stone crushing with mesh basket is low, and some hard cholesterol stones are difficult to be crushed by the mesh basket; , can only choose general anesthesia for biliary tract exploration surgery, which is risky; 5. The placement of SpyGlass lithotripsy under direct vision through ERCP is a new technology developed recently. The cost is extremely high, ordinary hospitals have not carried out this technology, and ordinary families cannot afford the huge and high treatment costs

The diameter of choledocholithiasis is more than 1.5cm. This treatment has the following disadvantages: 1. Using a balloon with a diameter of more than 1.5cm to dilate the duodenal papillary sphincter is prone to papillary tear bleeding, acute pancreatitis, perforation, etc. Short-term complications, as well as long-term complications such as reflux cholangitis, recurrence of stones, and cholangiocarcinoma; 2. Before PTCS, the fistula tract needs to be dilated before choledochoscopy can enter the common bile duct. Repeated dilation of the fistula tract in one operation is prone to fistula tract tear, hemorrhage, liver abscess and other complications; multiple operations to dilate the fistula tract are less risky, but the total cost is high, the course of disease is longer, and patients who carry external biliary drainage tubes for a long time have poor medical compliance and difficult nursing; 3. Biliary endoscopy is required for PTCS removal of stones, and the cost of choledochoscopy equipment is relatively high, and general hospitals do not have choledochoscopy equipment

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