Endoscope Puncture Device Resin Guide Wire Protection
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Solution Overview
Problem
During endoscopic ultrasound-guided biliary drainage (EUS-BD) procedures, guide wires are prone to damage due to contact with the blade surface of the puncture needle, which can occur during operations like pushing, pulling, and rotating.
Innovation Solution
An endoscope puncture device with a hollow puncture needle featuring a resin molded body inside the tip opening portion, which has a through hole for the guide wire and an edge portion extending along the circumference, preventing contact between the guide wire and the blade surface of the puncture needle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a hollow puncture needle with a blade surface is used for puncturing, then puncturing capability is improved, but the guide wire is damaged due to contact with the blade surface
Solution Approach 1:
A resin molded body is introduced as an intermediary component between the guide wire and the blade surface of the puncture needle. This resin molded body has a through hole that guides the guide wire, preventing direct contact between the guide wire and the sharp blade edges while still allowing the puncture needle to perform its cutting function effectively.
2Ease of operation
If operations such as pushing, pulling, and rotating the guide wire are performed, then guide wire insertion and positioning are facilitated, but contact with the blade surface causes damage
Solution Approach 1:
The resin molded body serves as a protective intermediary that allows free manipulation of the guide wire (pushing, pulling, rotating) while preventing harmful contact with the blade surface. The through hole in the resin molded body provides a safe pathway for guide wire operations.
Solution Approach 2:
The resin molded body is positioned in advance within the puncture needle to provide protective cushioning for the guide wire before any manipulative operations are performed. This pre-positioned protection prevents damage during subsequent pushing, pulling, and rotating operations.
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
Provided is an endoscope puncture device having a puncture needle capable of preventing damage to a guide wire. An endoscope puncture device (6) has: a sheath (7) inserted into an endoscope; a hollow puncture needle (8) disposed in the sheath (7) and provided with a blade surface (82) at the tip thereof; and a hollow resin molded body (10) provided in the puncture needle (8) and at least partially disposed inside a tip opening portion (80a) of the puncture needle (8).