Solution Bag Valve Spool Prevents Contamination in Blood Analysis
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Solution Overview
Problem
Existing solution bags for blood chemistry analysis are prone to contamination from outside sources before use, which compromises the reliability of measured data.
Innovation Solution
A solution bag design with a valve spool and solution leakage preventing unit, where the valve is opened only when the cartridge is attached to the apparatus, featuring a first blocking member to prevent leakage and a second blocking member to allow solution flow, ensuring containment and accurate data measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the solution bag is opened in advance and inserted into the measuring apparatus by a user, then the ease of operation is improved, but the solution becomes contaminated by outside contaminants and the reliability of measured data deteriorates
Solution Approach 1:
The valve spool is pre-positioned in the closed state during manufacturing, and the cartridge is prepared with the solution bag sealed inside. The system is ready for use but maintains contamination protection until the moment of actual use when the cartridge is attached to the apparatus, automatically opening the valve.
2Reliability
If a valve mechanism is added to prevent contamination, then the reliability of measured data is improved, but the device complexity increases
Solution Approach 1:
The valve spool mechanism is designed to automatically open when the cartridge is attached to the apparatus, eliminating the need for manual operation or external control. The system self-regulates the opening and closing of the valve based on the cartridge insertion event, reducing operational complexity while maintaining reliability.
Solution Approach 2:
The valve spool is integrated within the cartridge structure, with the blocking members positioned inside the flow channel. The compact nested design allows the valve mechanism to be contained within the existing cartridge form factor without significantly increasing overall device complexity.
3Reliability
If the valve remains closed to prevent leakage, then the solution containment is improved, but the solution flow to the sensor is blocked and measurement cannot be performed
Solution Approach 1:
The valve spool is designed as a movable component that transitions between closed and open states. The blocking members can be positioned to seal the flow channel during storage and transport, then moved to allow solution flow when the cartridge is attached to the apparatus, dynamically adapting to different operational requirements.
Data Source
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AI summary
The present invention provides a solution bag that is used for medical treatment and stores solution used for an apparatus for analyzing blood chemistry that measures and analyzes the concentrations of electrolytes, the partial pressures of gases, and the concentrations of metabolites or the volume ratio of red blood cells contained in blood. The solution bag for an apparatus for analyzing blood chemistry of the present invention includes: a receptacle that contains a solution; a valve body that is attached to the receptacle and has a through-hole longitudinally formed therein; a valve spool that is disposed in the thorough-hole of the valve body; and a solution leakage preventing unit that is disposed in the valve spool, in which the valve body has a flow channel and a solution discharging pipe spaced at a predetermined distance from each other, and the solution leakage preventing unit of the valve spool includes a first blocking member that prevents the solution from leaking outside and a second blocking member that is spaced apart from the first blocking member and stops or allows the solution flow from the flow channel to the solution discharging pipe.