Needleless access port valves
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Solution Overview
Problem
Existing needleless access port valves lack alternative designs that effectively manage fluid flow and microbial growth, particularly in medical applications where antimicrobial properties and efficient fluid path creation are crucial.
Innovation Solution
A valve assembly with a piston having a helical slit configuration and antimicrobial agents like silver, gold, and copper, integrated into the piston, valve housing, and nut fitting to enhance fluid flow management and prevent microbial growth, utilizing a combination of materials and cutting processes for the slit creation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional piston design is used, then the valve structure is simple, but fluid flow management is insufficient and microbial growth cannot be effectively prevented
Solution Approach 1:
The piston is segmented into multiple functional zones including a helical slit configuration that divides the fluid path into controlled segments, allowing directional flow management while maintaining structural integrity. The slit creates distinct flow channels that improve fluid dynamics without requiring multiple separate components.
Solution Approach 2:
The piston incorporates composite construction combining base piston material with integrated antimicrobial agents or coatings. This composite approach provides both mechanical sealing function and antimicrobial protection within a single component, enhancing reliability without proportionally increasing complexity.
2Object-affected harmful factors
If antimicrobial agents are integrated into the valve components, then microbial growth is prevented, but manufacturing complexity increases
Solution Approach 1:
Antimicrobial agents are merged directly into the piston and valve housing materials during the molding process, or applied as integrated coatings. This combining approach eliminates the need for separate antimicrobial components or assembly steps, reducing manufacturing complexity while maintaining protective functionality.
Solution Approach 2:
The antimicrobial protection is achieved by modifying material parameters during manufacturing - either by incorporating antimicrobial additives into the base material formulation or by applying surface treatments that alter the material's biological properties. These parameter changes are integrated into existing manufacturing processes rather than requiring entirely new fabrication methods.
3Productivity
If a helical slit configuration is created in the piston, then fluid flow is efficiently managed, but manufacturing precision requirements increase
Solution Approach 1:
The complex helical slit configuration is created not through traditional mechanical machining but through molding processes or laser cutting. This substitution replaces precision mechanical milling with forming techniques that achieve the same geometric complexity with lower precision requirements and greater design flexibility.
Solution Approach 2:
The helical slit introduces a three-dimensional spiral pathway for fluid flow, transforming a simple linear or radial flow pattern into a controlled helical flow. This dimensional complexity is achieved through the slit's spiral geometry rather than through complex valve mechanisms, improving fluid dynamics while using a relatively simple structural modification.
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 solution provides efficient fluid flow management and antimicrobial properties, reducing microbial growth and improving the reliability of needleless access port valves in medical applications.
Implementation Method 1
the piston further comprising a slit having an upper slit section and two lower slit sections extending radially across two opposed exterior surface sections of the flange and lengthwise in a direction of the inlet opening towards the bottom opening and through at least part of the neck section below the flange
Implementation Method 2
a body section defining an interior cavity with a pliable and resilient piston base
Implementation Method 3
incorporating antimicrobial agents into at least one of a piston, a valve housing, and a nut fitting for controlling unwanted microbial growth
Data Source
Figure 1~3
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Figure 6~7
AI summary
Needleless access port valves are generally discussed herein with particular discussions extended to needleless access port valves incorporating a piston comprising slit along an upper piston section for accommodating fluid flow. The slit opens when the piston is compressed by a medical implement, such as a syringe tip, to permit fluid communication between the inlet and the outlet of the vale housing. The slit may be cut using high frequency cutting machine or a multi-axis robot arm and a cutting blade.