Blood Pump Abnormality Detection from Average Phase Current
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Solution Overview
Problem
Existing methods for determining the state of blood pumps in ECMO systems are inaccurate, making it difficult to predict their condition, leading to potential waste from premature replacement or safety risks from delayed replacement.
Innovation Solution
A method involving the collection and analysis of average phase currents from a motor's phases, using a Hall sensor to determine stability, consistency, and cyclic changes in current to identify abnormalities in blood pumps, along with threshold comparisons for fluctuations and pipeline conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If blood pump operation time is extended to reduce consumable waste, then productivity is improved, but reliability deteriorates due to increased wear and potential hemolysis
Solution Approach 1:
The system performs preliminary detection of blood pump abnormalities by monitoring phase current characteristics before actual failure occurs. By identifying cyclic current changes that indicate wear or damage, the system enables proactive replacement timing, extending safe operation while preventing harmful failures.
Solution Approach 2:
The system continuously monitors phase currents and provides feedback on blood pump health status. The control unit analyzes current stability and cyclic patterns, giving real-time feedback on pump condition to determine optimal replacement timing, thus balancing extended use with safety.
2Device complexity
If simple flow-speed matching methods are used to detect blood pump abnormalities, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The system uses phase current as an intermediary parameter to indirectly detect blood pump abnormalities. Instead of directly measuring complex pump conditions, the system monitors current characteristics (stability and cyclic patterns) that reflect pump health, achieving precise detection without overly complex direct measurement systems.
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
Accurately identifies abnormal conditions in blood pumps, improving safety by allowing timely intervention and reducing waste through precise replacement timing.
Implementation Method 1
a tail end of the motor of the pump device is equipped with a Hall sensor
Data Source
AI summary
A method for predicting a blood pump state, characterized in that a pump device is driven by a motor, includes collecting an average phase current of each phase of the motor in a current cycle, determining whether the average phase current of each phase of the motor is stable, determining whether the average phase current of each phase of the motor changes consistently in response to determining that the average phase current of each phase of the motor is unstable, determining whether the average phase current of each phase of the motor changes shows a cyclic change in response to determining that the average phase current of each phase of the motor changes consistently, and determining that a blood pump of the pump device is abnormal in response to determining that the average phase current of each phase of the motor changes shows the cyclic change.