Endoscope Guide Wire Positioning for Safe Instrument Replacement
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Solution Overview
Problem
The existing endoscope systems require repetitive and time-consuming operations to position the guide wire correctly for instrument replacement in pancreaticobiliary duct treatments, leading to inefficient treatment processes.
Innovation Solution
The endoscope design includes a treatment instrument raising stand that guides the guide wire in a vertical direction, with a guide wire fixing mechanism near the distal end, allowing the guide wire to be positioned at a tilt angle equal to or smaller than the central axis of the field of view, ensuring the guide wire is fixed near the central line of the endoscopic image, facilitating safe and efficient instrument replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the guide wire is fixed using a conventional fixing structure, then the treatment instrument replacement is facilitated, but the guide wire distal point is not positioned at the appropriate location on the endoscopic image, requiring repetitive drawing or pushing operations that increase treatment time
Solution Approach 1:
The treatment instrument raising stand is designed to preliminarily position the guide wire at the correct tilt angle (equal to or smaller than the central axis tilt angle) before final fixation. This preliminary positioning ensures that when the guide wire is maximally raised, its distal point automatically appears at the appropriate location on the endoscopic image, eliminating the need for repetitive adjustment operations and reducing treatment time
2Measurement precision
If the distal end portion of the endoscope is positioned at the center of the field of view for optimal observation, then sharp and bright endoscopic images are obtained, but the guide wire distal point may not be at the appropriate position for instrument replacement
Solution Approach 1:
The invention changes the tilt angle parameter of the guide wire by designing the treatment instrument raising stand to raise the guide wire at a specific angle (equal to or smaller than the central axis tilt angle). This parameter adjustment ensures that when the distal end portion is positioned at the center of the field of view for optimal observation, the guide wire distal point simultaneously appears at the appropriate location on the endoscopic image, allowing both high image quality and ease of operation to be achieved concurrently
Data Source
AI summary
When a guide wire 5 is maximally raised on a treatment instrument raising stand 35, a distal point of the guide wire 5 is operated so as to be capable of always observing a papillary opening portion 7, which is a subject to be treated, from the front (in a basic position where the portion to be treated is positioned at the center of the field of view). The treatment instrument raising stand 35 is maximally raised in order that the tilt angle β of the guide wire 5 is equal to the tilt angle α of a central axis of a field of view of an observation window 30. Then, the guide wire 5 is fixed and a treatment instrument such as a drainage tube is replaced, whereby a treatment instrument can be easily and more safely replaced via the guide wire 5.