Blood Circulation System with Feedback-Controlled Roller Pump
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Solution Overview
Problem
The challenge is to stably circulate removed blood at a suitable flow rate in a blood circulation system, particularly when the blood removal rate changes significantly during surgical procedures.
Innovation Solution
The proposed blood circulation system includes a blood transfer pump, a blood removal line, a blood transfer line, blood removal rate measurement means, and a control unit. The control unit adjusts the blood transfer rate of the pump based on measured blood removal rate parameters to maintain the blood transfer rate within a specific range relative to the blood removal rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the blood removal rate changes significantly during surgical procedures, then the blood circulation system can adapt to varying surgical needs, but the blood transfer rate becomes unstable and difficult to control
Solution Approach 1:
The control unit receives a blood removal rate parameter from the blood removal rate measurement means and controls the blood transfer pump accordingly. This feedback mechanism allows the system to automatically adjust the blood transfer rate based on the actual blood removal rate, maintaining stable blood circulation even when surgical needs cause significant changes in blood removal rate.
2Device complexity
If manual operation is used to adjust blood flow rate, then the system can be operated with simple equipment, but advanced knowledge and techniques are required and operation becomes complex
Solution Approach 1:
The blood circulation system automatically adjusts the blood transfer rate based on feedback from the blood removal rate measurement means. The control unit autonomously controls the blood transfer pump without requiring manual intervention or advanced operational techniques, making the system both simple in equipment and easy to operate while maintaining stable blood circulation.
Data Source
AI summary
A blood circulation system that can be connected to a human body is provided. The system may include a roller pump, a blood removal line through which blood removed from the human body flows to the roller pump, a blood transfer line that transfers blood, which is sent from the roller pump, to the human body, means for measuring a blood removal rate provided in the blood removal line to measure a blood removal rate parameter of blood flowing through the blood removal line and a control unit, wherein the control unit is programmed to control a blood transfer rate of the roller pump by controlling a rotational speed of the roller pump with a control signal, such that a transfer rate of blood flowing through the blood transfer line is synchronized with a removal rate calculated from the blood removal rate parameter.