Needle Receiving Port With Intermediary Stop And Particulate Chamber
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Solution Overview
Problem
Existing medical device ports risk damaging hypodermic needle tips during insertion and withdrawal due to physical engagement with the septum, and they fail to effectively prevent particulate matter from entering the reservoir or catheter.
Innovation Solution
A medical device needle receiving port with a stop member having a hole that allows the needle point to extend into it without passing through, preventing tip damage, and a particulate collection chamber to filter out particles, where the hole's diameter is greater than the needle's outer diameter but less than its tip diameter, and the chamber has outlets to prevent particle passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a physical stop pad is inserted below the septum to engage the needle tip, then needle penetration is limited and tactile feedback is provided, but the fragile needle tip can engage the stop surface and curl up like a fish hook, causing damage to the septum when the needle is withdrawn
Solution Approach 1:
The patent introduces an intermediary structure (the hole with specific dimensions) between the needle tip and the stop pad. The hole acts as a mediator that allows the needle to be stopped without direct engagement between the needle tip and the stop pad surface, thus preventing the needle tip from curling while still providing stopping function and tactile feedback.
Solution Approach 2:
The patent segments the stopping function from the tactile feedback function. The hole provides the stopping function by limiting needle penetration, while the stop pad provides tactile feedback. This segmentation allows each component to perform its specific function without causing harmful interactions between the needle tip and the stop surface.
2Object-affected harmful factors
If a needle receiving port includes filtering means to prevent introduction of particulate matter, then particle prevention is improved, but the structure becomes more complex
Solution Approach 1:
The patent merges the filtering function with the existing hole structure. The hole serves dual purposes: it acts as a stop for the needle while also functioning as a filter for particulate matter. This merging of functions eliminates the need for separate filtering components, thus reducing structural complexity while maintaining particle prevention capability.
Data Source
AI summary
A medical device needle receiving port configured to stop a needle's penetration without physically engaging the needle's tip thereby reducing the likelihood of tip damage. The port preferably incorporates a particulate chamber for collecting particulates larger then a fluid outlet dimension.