Papilla Pulling Bile Duct Insertion Tool

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Solution Overview

Problem

Inserting medical devices into bile ducts is challenging due to narrowed and tortuous portions, which existing technologies have not effectively addressed.

Innovation Solution

A method involving the insertion of a first device into the duodenum and advancing a second device within the bile duct by pulling the papilla with the first device, utilizing an endoscopic treatment tool with a sheath and forceps jaw that can move radially to facilitate device insertion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional medical devices are used for bile duct insertion, then the device structure remains simple, but the insertion difficulty increases due to narrowed and tortuous bile duct portions

Engineering Contradiction:

Improveinsertion easeVSAvoiddevice structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The device is divided into multiple functional segments: a papilla gripping portion with forceps jaws for securing the papilla, a sheath for guiding and protecting the medical device, and a guide wire lumen for device passage. This segmentation allows each component to perform its specific function efficiently, resolving the contradiction between insertion ease and structural simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The guide wire tube is inserted through the sheath, and the guide wire is advanced through the guide wire tube lumen. This nested configuration allows multiple functional elements to be integrated within a compact structure, enabling complex insertion maneuvers without proportionally increasing external device complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If the bile duct is pulled to facilitate device insertion, then insertion ease improves, but the risk of tissue damage increases

Engineering Contradiction:

Improveinsertion easeVSAvoidtissue damage risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The forceps jaws are positioned to grip the papilla before device insertion begins. This preliminary action secures the papilla in an optimal position, allowing subsequent device advancement to proceed smoothly without requiring excessive pulling forces that could cause tissue damage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The sheath acts as an intermediary between the operator and the bile duct tissue. It provides a smooth, controlled interface for device passage and distributes mechanical forces evenly, reducing the risk of concentrated stress and tissue damage during insertion maneuvers.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20240382079A1Method for insertion into bile duct and endoscopic treatment tool

Publication Date: 2024.11.21 OLYMPUS MEDICAL SYST CORP

AI summary

A method for insertion into a bile duct includes inserting a first device from a duodenum into an opening of a papilla, and advancing a second device within the bile duct while pulling the papilla with the first device.