Puncture Device with Movable Base for Fiber Protection
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Solution Overview
Problem
Existing puncture devices for delivering near-infrared light to deep-seated cancer cells, such as those in the pancreas, face challenges in ensuring pushability for puncture and preventing optical fiber breakage due to blade surfaces during insertion and irradiation.
Innovation Solution
A puncture device with a metallic needle tube and an optically transparent tube accommodating an optical fiber, where the needle tip member is supported by a movable needle base member for puncture pushability and the tube is partially exposed to radiate light from the optical fiber without protruding from the blade surface, ensuring both puncture efficacy and fiber integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the optical fiber protrudes from the needle tip to ensure light delivery to the target, then the light radiation effectiveness is improved, but the optical fiber is vulnerable to breakage due to contact with the blade surface during insertion
Solution Approach 1:
The optical fiber is nested within the transparent tube, which is in turn nested within the needle tube. This nested structure protects the optical fiber from direct contact with the blade surface during insertion while allowing light to be delivered to the target when the tube is exposed after puncture.
Solution Approach 2:
The transparent tube acts as an intermediary between the optical fiber and the external environment. It protects the optical fiber during insertion while allowing light transmission to the target site after the needle has punctured the tissue.
2Ease of manufacture
If the needle tube structure is simplified for ease of manufacture, then the manufacturing cost is reduced, but the pushability and puncture efficacy are compromised
Solution Approach 1:
The needle tube is segmented into distinct components: a metallic needle tube for puncture, a transparent tube for light delivery, and an optical fiber for light generation. This segmentation allows each component to be optimized for its specific function while maintaining overall manufacturing feasibility.
3Area of stationary object
If the tube is fully exposed from the needle tube to maximize light radiation, then the light delivery coverage is improved, but the optical fiber becomes vulnerable to damage from the blade surface
Solution Approach 1:
The transparent tube is designed to be dynamically exposed after the needle punctures the target tissue. During insertion, the tube remains protected within the needle tube. After puncture, the tube can be exposed to provide light radiation coverage while the needle base member maintains protection at the insertion site.
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
The device ensures effective puncture of cancer cells while preventing optical fiber breakage, allowing for reliable delivery of near-infrared light to target sites deep within the body.
Implementation Method 1
transmitting light emitted from an optical fiber through the tube exposed from the needle tube to irradiate the irradiation site with the light
Implementation Method 2
causing the protruding needle tube to puncture a vicinity of the irradiation site
Data Source
AI summary
Provided is a puncture device includes: a needle tube; and a tube that is accommodated within the needle tube, is capable of accommodating an optical fiber, and is composed of a cylindrical optically-transparent material. The needle tube includes a tip member fixed to a distal end of the tube and having a blade surface at a tip thereof, and a base member that is disposed at a position where the base member covers a proximal end of the tube relative to the tip member and that is movable along a longitudinal axis of the needle tube. The base member advances to cause a distal end of the base member to abut on a proximal end of the tip member. The base member retracts to cause the distal end of the base member to move away from the proximal end of the tip member in a direction of the longitudinal axis.