Puncture Device Shaft Flexibility for Angled Endoscope Stability

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Solution Overview

Problem

Existing puncture devices for endoscopes face challenges with needle stability and accuracy when the endoscope is angled, leading to potential bending and deformation of the puncture needle, which compromises the ability to accurately target and penetrate the puncture site.

Innovation Solution

The puncture device incorporates a needle member with a puncture portion and a shaft portion, where the shaft portion includes a core member and an outer layer body. This configuration allows for adjustable flexibility of the shaft portion, ensuring it remains more flexible than the puncture portion, thereby maintaining stability and accuracy even when the endoscope is angled.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the puncture needle is pushed out in a state where the endoscope is angled, then the puncture can reach the target site, but the puncture needle itself may bend and be deformed

Engineering Contradiction:

Improvepuncture capability when endoscope is angledVSAvoidstraightness of puncture needle

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The puncture needle is divided into two distinct segments: a puncture portion with a sharp distal end for penetration, and a shaft portion with a core member and outer layer body that provides flexibility. This segmentation allows each part to perform its specific function optimally - the sharp puncture portion maintains stability during penetration while the flexible shaft portion accommodates angling without bending

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different parts of the puncture needle have different mechanical properties tailored to their specific functions. The puncture portion has high rigidity and sharpness for stable penetration, while the shaft portion has controlled flexibility through its core member and outer layer body structure. This local differentiation of properties resolves the contradiction between needing straightness for puncture accuracy and flexibility for angled operation

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If the shaft portion is made more flexible to accommodate endoscope angling, then the puncture device can be operated in angled states, but the stability and straight advancing capability may be compromised

Engineering Contradiction:

Improveflexibility of shaft portionVSAvoidstraight advancing stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The shaft portion is designed with dynamic flexibility through its core member and outer layer body structure, allowing it to adapt to angled positions. The flexibility is carefully controlled so that the shaft can bend to accommodate endoscope angling while maintaining sufficient straight advancing stability during the actual puncture operation, thus achieving both adaptability and reliability

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250049471A1Puncture device

Publication Date: 2025.02.13 ASAHI INTECC CO LTD

AI summary

A puncture device includes a puncture portion having a needle tip with a sharp distal end, and a shaft portion on a proximal end side of the puncture portion. The shaft portion includes a core member and an outer layer body arranged on an outer peripheral surface of the core member.