Compliant Syringe Needle Helical Spring Reduces Insertion Pressure
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Solution Overview
Problem
Current needle insertion systems for medical procedures often cause pain and are not adaptable to individual patient pain sensitivity, limiting their effectiveness and applicability across different injection sites.
Innovation Solution
A compliant syringe system with a helical or spring-based design that reduces insertion pressure by incorporating a compliant portion, allowing for tailored compliance to suit patient-specific needs and enabling use across various injection sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional rigid needle is used for injection, then the needle structure is simple and easy to manufacture, but the insertion pressure is high causing pain and non-compliance
Solution Approach 1:
The patent applies a flexible membrane structure to the needle assembly that can deform during insertion. The membrane acts as a compliant interface between the rigid needle core and the tissue, allowing the system to reduce peak insertion pressure while maintaining structural integrity and manufacturability.
Solution Approach 2:
The patent changes the mechanical parameters of the needle system by introducing a compliant membrane with specific elasticity characteristics. This transforms the rigid needle into a system with controlled compliance, reducing insertion pressure through parameter modification rather than complete structural redesign.
2Object-affected harmful factors
If a compliant needle design is implemented to reduce insertion pressure, then patient comfort improves, but the device complexity increases
Solution Approach 1:
The needle assembly is segmented into distinct functional components: a rigid core needle for structural support and fluid delivery, and a separate compliant membrane layer for pressure reduction. This segmentation allows each component to be optimized independently while maintaining overall system simplicity.
Solution Approach 2:
The compliant membrane serves multiple functions simultaneously: it reduces insertion pressure, maintains needle structural integrity, and can be integrated with standard syringe configurations. This multi-functionality reduces the need for additional specialized components.
3Object-affected harmful factors
If a compliant portion is added to the syringe system, then insertion pressure is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The compliant portion is implemented as a thin membrane film that can be manufactured using standard film-forming techniques and then integrated into the needle assembly. This approach maintains ease of manufacture by using established manufacturing processes rather than requiring new complex fabrication methods.
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 compliant syringe system significantly decreases the critical pressure required for needle insertion, reducing pain and improving the reliability of needle insertion across different tissue types and patient sensitivities.
Implementation Method 1
a spring; wherein the spring is located in the inner tube space in between a tube end opening and the syringe
Data Source
AI summary
In an embodiment, a syringe needle comprises a helical portion located in between a needle tip portion and a distal portion. In another embodiment, a compliant article comprises a casing tube comprising a tube end opening located at a needle tube end of the casing tube, a distal tube opening located at a distal tube end of the casing tube, and an inner tube space; and a syringe needle that traverses the tube end opening; wherein the compliant article comprises a compliant portion that allows for a reduced insertion pressure of the syringe needle as compared to an insertion pressure of a corresponding syringe needle in an article without the compliant portion.