Blood Circulation System Linked Pump Control
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Solution Overview
Problem
Current blood circulation systems face challenges in stably transferring blood when the blood removal rate changes significantly during surgical situations, requiring advanced and complex manual adjustments to maintain efficient blood circulation.
Innovation Solution
A blood circulation system that includes a blood transfer pump, a blood removal line, a blood transfer line, a blood removal rate measurement means, and a control unit that performs linked control of the blood transfer pump to maintain a specific blood transfer rate range, allowing for automatic adjustment and synchronization with the blood removal rate, and includes a blood transfer rate adjustment unit that can reset from any arbitrary position, eliminating the need for manual resetting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation is used to adjust blood flow rate by pinching the blood removal line, then the blood flow rate can be adjusted, but complex and advanced operation techniques are required in addition to adjusting each line
Solution Approach 1:
The system uses a blood removal rate sensor to continuously monitor the actual blood removal rate and feeds this information back to the controller. The controller then automatically adjusts the blood transfer pump speed to maintain the blood transfer rate within a specific range relative to the blood removal rate, eliminating the need for complex manual adjustment techniques while ensuring proper blood flow control.
2Stability of the object's composition
If the blood transfer pump is controlled independently from the blood removal rate, then the blood transfer rate can be set freely, but the blood circulation becomes unstable when blood removal rate changes significantly
Solution Approach 1:
The system dynamically adjusts the blood transfer pump control based on the actual blood removal rate. The controller calculates the appropriate blood transfer rate by maintaining a specific range relationship with the blood removal rate, allowing the system to adapt automatically to changes in blood removal conditions while ensuring stable blood circulation. This dynamic control mechanism combines stability with adaptability.
3Productivity
If the blood transfer rate adjustment unit requires manual resetting to reference position, then the system can be reset, but labor and time are required for resetting
Solution Approach 1:
The system uses an encoder to detect the actual position of the blood transfer rate adjustment unit and automatically calculates the required adjustment to return to the reference position. The controller autonomously executes the resetting operation without requiring manual intervention, enabling the system to reset itself efficiently and eliminating the time and labor that would otherwise be required.
Data Source
AI summary
An artificial heart and lung apparatus (100) includes a roller pump (120); a blood removal line (101); a first blood transfer line (104); a blood removal rate sensor (111); a control unit (140) that performs the linked control of the roller pump (120) in correspondence with a blood removal rate; and a blood transfer rate adjustment unit (160) that instructs the roller pump (120) to transfer a blood transfer rate. The blood transfer rate adjustment unit (160) includes an operation amount input unit to which an operation amount from an arbitrary circumferential position can be input, and which outputs a pulse signal according to the input operation amount, and a counter that adds and subtracts pulse signals output from the operation amount input unit, and outputs a resultant as blood transfer rate adjustment data, and the counter performs a counting operation with respect to the circumferential position of the operation amount input unit when blood transfer control transitions to the normal control.