Endoscopic ultrasonography guided biliary tract admission passage system

Abstract

The present invention provides an admission passage system which has an operational duct assembly. The duct assembly is configured to provide an admission passage to a target vessel and guide the target vessel for follow-up treatment. The admission passage system comprises an adjustable transmission handle assembly and an admission passage pipe sub assembly which has an operational admission passage duct configured to be transmitted to a target position (such as the duodenum) so as to assist in the treatment of diseases (such as bile duct drainage through endoscopic ultrasonography guided biliary tract drainage (EUS-BD)). The admission passage duct comprises at least a far side section which has an adjustable part along the length direction. The adjustable part is configured to be converted to a preset arc shape so as to provide a direction control for the far end of the duct when guiding the adjustable part to pass through a pulse duct (such as bile duct). The handle assembly comprises other elements which are configured to permit clinicians to control and operate the far end of the admission passage duct.

Description

technical field [0001] The present disclosure relates generally to minimally invasive access devices, and more particularly to an endoscopic ultrasound (EUS) guided access system having a steerable catheter assembly configured to provide Access to and guide target vessels for subsequent treatment. Background technique [0002] Diseases and disorders of the gallbladder, pancreas, and bile ducts (eg, the pancreaticobiliary system) are associated with significant morbidity, mortality, and impact on quality of life. Obstructions, tumors, lesions, leaks, and lesions can occur in these structures, which can eventually lead to conditions such as biliary colic, cholecystitis, choledocholithiasis, gallstone disease, pancreatitis, pancreatic duct stones, and chronic abdominal pain. disease. Additionally, diseases / disorders of the pancreaticobiliary system may be associated with nutritional disorders such as malnutrition, obesity, and high cholesterol. [0003] figure 1 A part of t...

AI Technical Summary

Problems solved by technology

Specifically, existing needle designs are rigid, thus severely limiting the clinician's ability to guide the guide wire

Furthermore, biliary drainage by rendezvous technique may not be feasible in cases where the guidewire cannot be advanced through the ampulla due to difficult angulation or narrowing of distal biliary structures

Therefore, biliary drainage by the needle rendezvous technique may require repeated punctures with different angles, often resulting in a prolonged high-intensity procedure with the risk of shearing the guide wire and / or bile leakage

Additional difficulties currently identified by clinicians performing the EUS / ERCP rendezvous technique are difficulty in advancing a guidewire or navigating a guidewire through an obstruction, difficulty achieving penetration into the bile duct, clinical complications such as pancreas from trauma to the duct Inflammation etc.

Also, endoscope exchange between an EUS endoscope and an ERCP endoscope in order to retrieve the guidewire can be tedious and difficult to maneuver

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