Endoscope Dual-Channel Biliary Insertion Guide Wire

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Solution Overview

Problem

Existing methods for inserting treatment tools into the biliary tract, such as endoscopic retrograde cholangiopancreatography (ERCP), are highly difficult and may fail to successfully insert a guide wire into the common bile duct, necessitating alternative procedures like endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) that require complex equipment and multiple scopes.

Innovation Solution

An endoscope system with two channels allows for the puncture needle to project from one channel to puncture the biliary tract, a guide wire to be inserted via the needle tube, and the treatment tool to be inserted via the guide wire, utilizing a raised angle mechanism to facilitate tool insertion without replacing scopes, reducing procedural complexity and costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If ERCP method is used to insert treatment tool into biliary tract, then treatment can be performed, but the procedure is highly difficult and may fail to successfully insert guide wire

Engineering Contradiction:

Improvesuccess rate of guide wire insertionVSAvoiddifficulty of procedure

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent uses an endoscope as an intermediary device to provide real-time visual guidance during the puncture and guide wire insertion process. The endoscope allows operators to directly observe the puncture needle entering the biliary tract and the guide wire being inserted, making the procedure more reliable and easier to perform compared to blind ERCP techniques

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If EUS-FNA method is used as alternative to ERCP, then guide wire can be inserted into biliary tract, but complex equipment and multiple scopes are required

Engineering Contradiction:

Improveability to insert guide wire into common bile ductVSAvoidnumber of scopes and equipment

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the puncture needle, needle tube, and endoscope into an integrated system. The puncture needle is inserted through the endoscope's channel, and the guide wire is inserted through the needle tube while the endoscope remains in place to provide continuous visual guidance. This merging eliminates the need for multiple separate scopes and reduces equipment complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The endoscope serves multiple functions: it provides visual guidance for puncture, allows insertion of the puncture needle through its channel, and enables observation during guide wire insertion. This multi-functionality replaces the need for separate specialized equipment required in traditional EUS-FNA procedures

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If traditional ERCP cannula insertion is used, then treatment tool can be inserted into biliary tract, but the cannula must be inserted at a fixed angle which limits accessibility

Engineering Contradiction:

Improveangle of tool insertionVSAvoidstructural complexity of endoscope channel

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent makes the endoscope channel dynamic by allowing it to change its angle relative to the biliary tract. The endoscope can be bent and positioned at different angles to accommodate various anatomical configurations, enabling treatment tools to be inserted at multiple angles rather than a fixed angle, thus improving adaptability without excessive structural complexity

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method simplifies the insertion of treatment tools into the biliary tract by allowing tools to be inserted at different angles, reducing the need for multiple scopes and operators, thereby reducing procedural time and costs while improving accessibility and ease of use.

Implementation Method 1

making a puncture needle project from a first channel of an endoscope and puncturing an upper digestive tract to place a distal end of a needle tube of the puncture needle inside a biliary tract

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

inserting a guide wire into the biliary tract via the needle tube and making a distal end of the guide wire extend out from a duodenal papilla into a duodenum

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 3

inserting the treatment tool inside the biliary tract via the guide wire

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS10016123B2Method of inserting treatment tool

Publication Date: 2018.07.10 OLYMPUS CORPORATION(JP)

AI summary

A method of inserting a treatment tool includes: making a puncture needle project from a first channel of an endoscope and puncturing an upper digestive tract to place a distal end of a needle tube of the puncture needle inside a biliary tract while observing an ultrasound image; inserting a guide wire into the biliary tract via the needle tube and making a distal end of the guide wire extend out from a duodenal papilla into a duodenum; placing a distal end portion of the endoscope in vicinity of the duodenal papilla while keeping the distal end of the guide wire extending out from the duodenal papilla while observing a captured image; pulling the guide wire extending out from the duodenal papilla into a second channel having a raised angle of the treatment tool larger than that of the first channel; and inserting the treatment tool inside the biliary tract via the guide wire.