Puncture Needle Structure for High Flow and Distal Tip Strength
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Solution Overview
Problem
Existing puncture needles face challenges in maintaining strength at the leading end when increasing the size or number of openings to enhance fluid flow, leading to difficulty in puncturing the fossa ovalis, and have complex production processes.
Innovation Solution
A puncturing device comprising a resin tube with a metal core member and metal tip, featuring a flow path between the resin tube and metal core member, allowing communication with the lumen of a metal tube, and including openings on the resin tube for fluid discharge, which maintains strength and facilitates production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number or size of openings in the puncture needle is increased to enhance fluid flow rate, then the flow rate of liquid is improved, but the strength of the leading end portion is decreased
Solution Approach 1:
The puncture needle is divided into multiple components: a leading end portion with openings for fluid discharge, a shaft portion extending from the leading end, and a handle portion at the proximal end. This segmentation allows the leading end portion to be optimized for fluid flow while the shaft and handle portions provide structural strength and support.
Solution Approach 2:
The puncture needle combines materials with different properties: the leading end portion is made of a material suitable for tissue puncture and fluid discharge, while the shaft portion incorporates a flexible tube with a lumen. This composite structure enables the device to simultaneously achieve high fluid flow rate through multiple openings and maintain sufficient strength for puncturing the fossa ovalis.
2Ease of operation
If the opening size or number is increased to facilitate confirmation of puncture hole, then the ease of operation is improved, but the manufacturing complexity increases
Solution Approach 1:
The device is segmented into distinct functional portions: the leading end portion containing the openings for fluid ejection, the shaft portion providing structural support, and the handle portion for operator control. This segmentation simplifies manufacturing by allowing each portion to be produced and optimized independently, then assembled together.
Solution Approach 2:
Different portions of the puncture needle have different structural characteristics optimized for their specific functions. The leading end portion has openings arranged to maximize fluid discharge for easy puncture confirmation, while the shaft portion has a lumen and flexible tube structure for strength and flexibility. This local optimization achieves ease of operation without requiring complex manufacturing throughout the entire device.
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 robustness at the distal end while enhancing fluid flow rate, simplifying production, and improving ease of use in puncturing the fossa ovalis.
Implementation Method 1
a metal core member (30) joined to a distal end portion of the metal tube (20)... The puncturing device (1) has a flow path (50) for a liquid, between an inner surface of the resin tube (10) and an outer surface of the metal core member (30)
Implementation Method 2
The resin tube (10) has, in a side face thereof, an opening (11) that allows communication between the flow path (50) and outside of the resin tube (10)
Data Source
AI summary
A puncturing device (1) comprising: a resin tube (10) having a distal end and a proximal end and extending in a longitudinal direction; a metal tube (20) disposed in a lumen of the resin tube (10); a metal core member (30) joined to a distal end portion of the metal tube (20); and a metal tip (40) joined to a distal end portion of the metal core member (30), wherein the puncturing device (1) has a flow path for a liquid, between an inner surface of the resin tube (10) and an outer surface of the metal core member (30), the flow path is in communication with a lumen of the metal tube (20), and the resin tube (10) has, in a side face thereof, an opening (11) that allows communication between the flow path and outside of the resin tube (10).