Liquid Aspirator with Communicating Sections for Vacuum Tube Analysis
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Solution Overview
Problem
Existing blood analyzers are large, complex, and difficult to operate, making them unsuitable for immediate use in emergency situations, and the AD system used in sample analyzers often results in inaccurate quantification due to negative pressure issues when aspirating from vacuum blood sampling tubes.
Innovation Solution
A portable and simplified sample analyzer with a liquid aspirator having an elongated pipe with communicating sections on its outer surface, air bubble sensors, and a controller to manage air bubbles, allowing for accurate aspiration and analysis without the need for a separate cleaning flow system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional vent pipe is attached to the pipette in parallel, then the sucking operation can be performed smoothly, but the construction of the analyzer becomes complicated due to the need for a cleaning flow system
Solution Approach 1:
The patent combines the vent pipe and cleaning pipe functions into a single integrated structure. The vent pipe is formed with a branch that serves as the cleaning pipe, eliminating the need for separate cleaning flow system while maintaining both ventilation and cleaning functionalities during the sucking operation
Solution Approach 2:
The vent pipe is designed to serve multiple functions: it provides ventilation during suction operation and simultaneously acts as a cleaning pipe for removing residual samples. This multi-functional design reduces the overall number of components and simplifies the analyzer construction
2Productivity
If the pipette is inserted in a vacuum blood sampling tube, then sample aspiration can be performed, but negative pressure remains in the tube resulting in erroneous quantification
Solution Approach 1:
The invention extracts and removes the negative pressure from the vacuum blood sampling tube by providing a dedicated vent path through the branch of the vent pipe. This allows the negative pressure to be released while maintaining the sample aspiration function, thereby ensuring accurate quantification
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 enables accurate and efficient sample analysis in a compact, easy-to-operate device, reducing noise and simplifying maintenance, while ensuring precise quantification and quiet operation.
Implementation Method 1
when the pipette is inserted in a vacuum blood sampling tube (a rubber-capped tube) employed as a sample container, a negative pressure is liable to remain in the vacuum blood sampling tube
Implementation Method 2
the pipe having a liquid flow path extending therein and a plurality of communicating sections provided in an outer surface thereof, at least one of the communicating sections communicating between an inside and an outside of the container when the pipe is stuck into the container
Data Source
AI summary
A sample analyzer includes a liquid aspirator to be stuck into the closed container for aspirating a sample from a closed container; a preparing section for preparing an analysis sample using the aspirated sample; and an analyzing section for analyzing the prepared analysis sample; the liquid aspirator including an elongated pipe, the pipe having a liquid flow path extending therein and a plurality of communicating sections provided in an outer surface thereof, at least one of the communicating sections communicating between an inside and an outside of the container when the pipe is stuck into the container.