Puncturing Needle Flow Path for Clearer Septal Penetration Imaging
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Solution Overview
Problem
Existing puncturing devices for the fossa ovalis suffer from poor visibility of the ejected liquid during intracardiac echocardiography or X-ray irradiation, making it difficult to confirm penetration.
Innovation Solution
A puncturing device with a resin tube and metal member configuration that includes a flow path between the inner surface of the resin tube and the outer surface of the metal member, with an opening on the distal side of the metal tube and proximal side of the metal tip, allowing for wide ejection of liquids like saline or contrast medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional puncturing needle is used, then the structure is simple and easy to manufacture, but the visibility of the ejected liquid in intracardiac echocardiography or X-ray irradiation is poor
Solution Approach 1:
The puncturing device employs a nested structure where the metal tube is disposed inside the resin tube, and the metal member is disposed inside the metal tube. This nested configuration allows multiple functional components to be integrated within a compact form factor, improving liquid visibility through the metal components' radiopacity while maintaining overall device simplicity and ease of manufacture.
Solution Approach 2:
The device combines different materials with complementary properties: the resin tube provides flexibility and biocompatibility, while the metal tube and metal member provide radiopacity for enhanced visibility during X-ray irradiation and intracardiac echocardiography. This composite material approach resolves the contradiction between visibility improvement and device complexity.
2Measurement precision
If the flow path is enlarged for wide liquid ejection, then the visibility improves, but the device structure becomes more complex
Solution Approach 1:
The flow path is designed to utilize the natural space between the resin tube's inner surface and the metal member's outer surface, eliminating the need for additional flow path components. The liquid automatically flows through this annular space driven by pressure differential, providing wide ejection for improved visibility without adding structural complexity.
Solution Approach 2:
The flow path is segmented into multiple regions: the lumen of the metal tube, the annular space between the resin tube and metal member, and the opening portion. This segmentation allows optimized liquid flow distribution that enhances visibility while maintaining a relatively simple overall structure.
3Measurement precision
If the opening portion is positioned for optimal liquid ejection, then the visibility in imaging improves, but the manufacturing precision requirements increase
Solution Approach 1:
The opening portion is strategically positioned on the resin tube at a specific location (between the distal end of the metal tube and the proximal end of the metal tip) to optimize liquid ejection direction and visibility. This localized quality enhancement at the opening portion does not require high precision throughout the entire device, as other sections can be manufactured with standard tolerances.
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
Enhances visibility in intracardiac echocardiography and X-ray irradiation by enabling wide-range ejection of liquids, facilitating easier confirmation of puncture hole presence.
Implementation Method 1
current is conducted to the septum puncturing needle, to cauterize and penetrate the fossa ovalis
Implementation Method 2
the resin tube includes a flow path which is present between an inner surface of the resin tube and an outer surface of the metal member and which is in communication with a lumen of the metal tube
Data Source
AI summary
A puncturing device comprising: a resin tube having a distal end and a proximal end, and extending in a longitudinal direction; a metal tube disposed in a lumen of the resin tube; a metal member disposed at a distal end portion of the metal tube; and a metal tip disposed at a distal end portion of the metal member, wherein a flow path is present between an inner surface of the resin tube and an outer surface of the metal member and is in communication with a lumen of the metal tube, the resin tube further includes an opening portion through which the flow path and outside of the resin tube are in communication with each other, and the opening portion is present on a distal side relative to a distal end of the metal tube and on a proximal side relative to the proximal end of the metal tip.