Biological Component Collection System Pressure Measurement
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Solution Overview
Problem
Existing biological component collection systems face challenges in accurately measuring circuit internal pressure, leading to potential operational inefficiencies and errors in blood component separation processes.
Innovation Solution
A biological component collection system equipped with a separation device featuring first and second load detecting units, collection and returning pumps, and a correction unit that adjusts internal pressure calculations to ensure accurate measurement by equalizing pressures across the collection and returning lines, using soft material forming members with applied load measurement units and a filter accommodating unit for dual functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single load detecting unit is used to measure circuit internal pressure, then the device structure is simple, but measurement accuracy is insufficient due to pressure differences between collection and returning lines
Solution Approach 1:
The patent divides the pressure measurement function into two separate load detecting units: one for the collection line and one for the returning line. This segmentation allows independent measurement of pressure in each line, resolving the measurement accuracy issue while keeping each detection unit relatively simple in structure.
Solution Approach 2:
The patent introduces a correction unit that acts as an intermediary between the two load detecting units. This correction unit processes the data from both detectors, applies correction based on the communication state of the lines, and produces accurate circuit internal pressure measurements, thereby solving the measurement accuracy problem without requiring complex hardware modifications.
2Reliability
If pressure measurement system is added to monitor circuit internal pressure, then operational safety is improved, but device complexity increases
Solution Approach 1:
The patent combines the pressure measurement and correction functions into an integrated system where the correction unit works in conjunction with the two load detecting units. This merging approach ensures reliable pressure monitoring while avoiding the need for completely separate, complex measurement systems.
Solution Approach 2:
The correction unit implements a feedback mechanism that continuously monitors the communication state between collection and returning lines and adjusts the pressure measurements accordingly. This feedback system enhances operational reliability by ensuring accurate pressure readings while maintaining a relatively simple device structure through intelligent control.
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
This configuration allows for precise measurement of circuit internal pressure, reducing measurement errors and enhancing operational efficiency during blood component collection and returning processes, while maintaining a compact structure and reducing operator workload.
Implementation Method 1
a first load detecting unit and a second load detecting unit... in the first line forming member, there is provided a first applied load measurement unit adapted to measure a load applied to the wall portion of the first line forming member by the first load detecting unit
Implementation Method 2
a collection and returning pump, the biological component collection system performing a plurality of times a cycle including a collection operation in which the biological liquid is allowed to flow from a donor through the collection line to the separation device under an action of the collection and returning pump
Implementation Method 3
a separation device having a first load detecting unit and a second load detecting unit and which is adapted to separate a biological component from a biological liquid
Data Source
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AI summary
A blood component collection system (10) includes a first internal pressure calculation unit (110) adapted to calculate a first internal pressure of a first pressed portion (60) using first calibration curve data (118), a second internal pressure calculation unit (112) adapted to calculate a second internal pressure of a second pressed portion (62) using second calibration curve data (120), and a correction unit (114) adapted to correct the first calibration curve data (118) in a manner so that, during a blood returning operation, the first internal pressure calculated by the first internal pressure calculation unit (110) becomes equal to the second internal pressure calculated by the second internal pressure calculation unit (112).