Medical Vial Purging via Segmented Nitrogen Manifold
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Solution Overview
Problem
Existing medical vial filling systems inadequately purge oxygen from vials, allowing reactive oxygen to degrade solutions over time and allowing ambient oxygen to return during processing, which is not sufficiently replaced by non-reactive gases like nitrogen.
Innovation Solution
A medical vial filling system that directs a flow of non-reactive gas, such as nitrogen, in a specific ratio of flood volume to nozzle stream volume, above, around, and into the vial during filling and capping, utilizing a manifold and stoppering block with strategically positioned outlet ports to maintain a nitrogen-rich environment throughout the filling and capping process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple gas stream is passed over or into the vial during filling, then the device complexity is low, but the oxygen purging effectiveness is insufficient and oxygen returns during subsequent processing
Solution Approach 1:
The purging system is segmented into multiple functional zones: a filling chamber with nitrogen inlet ports for initial purging, a transfer region with nitrogen outlets to maintain inert atmosphere during movement, and a capping chamber with additional nitrogen supply. This segmentation allows effective oxygen removal at each stage without requiring a single complex system
Solution Approach 2:
Nitrogen purging is performed preliminarily during the filling operation itself, before the vial is transferred to the capping station. The filling chamber introduces nitrogen to displace oxygen while the solution is being filled, establishing an inert atmosphere in advance to prevent oxidation during subsequent processing steps
2Stability of the object's composition
If ambient air surrounds the open vial during filling and transfer, then the ease of operation is high, but oxygen degrades the solution over time
Solution Approach 1:
The system creates an inert nitrogen atmosphere throughout the filling and capping process. Nitrogen is supplied to the filling chamber and transfer region to displace ambient air, maintaining a low-oxygen environment that prevents solution degradation. The inert atmosphere is sustained from filling through transfer to capping, ensuring solution stability without complicating the operational process
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
Effectively reduces oxygen content in medical vials to minimize solution degradation, maintaining a non-reactive gas environment during filling and capping, ensuring the vials contain minimal oxygen, typically around 0.2%, thereby preserving the solution's integrity.
Implementation Method 1
A flow of non-reactive gas is directed in a space above and around the medical vial when the medical vial is positioned in the filling station
Implementation Method 2
A manifold defining a filling chamber having outlet ports dispensing the non-reactive gas
Implementation Method 3
a nozzle stream directed into the medical vial when the medical vial is position in the capping station
Data Source
AI summary
A medical vial filling system is adapted to fill a medical vial with a solution and cap the filled medical vial. A purging system includes a manifold disposed between a filling station and a capping station. The manifold includes a filling inlet port and a plurality of output ports. The output ports are positioned in a space proximate the filling station and in a space over the transport mechanism. A stoppering block includes a capping chamber for receiving a bushing positioned at the capping station. The stoppering block comprises a stoppering inlet port, a first nozzle opening into the capping chamber and a second nozzle extending into the capping chamber and directed into the medical vial when the medical vial is position in the capping station. A supply of non-reactive gas at the filling inlet port directs flow of the non-reactive gas out the manifold outlet ports to evacuate air and substitute the non-reactive gas in the filled medical vial and at the stoppering inlet port directs flow of the non-reactive gas in a flood zone surround a space above the medical vials when the medical vial is positioned in the capping station and in a stream directed into the medical vial when the medical vial is positioned in the capping station.