Blood Pump State Prediction Through Hall-Sensed Motor Current
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Solution Overview
Problem
Existing methods for determining the state of blood pumps in ECMO systems are inaccurate, leading to difficulties in predicting their condition, which can result in premature replacement or delayed replacement, affecting patient safety and causing waste of consumables.
Innovation Solution
A method and device for predicting blood pump state using a Hall sensor to collect and analyze the average phase current of a motor, determining stability and consistency of the current, and detecting cyclic changes to identify abnormalities, hardware faults, and pipeline issues.
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 wear reaching service life limits
Solution Approach 1:
The system performs preliminary detection of blood pump wear status through motor current analysis before the pump actually fails. By monitoring phase current stability and detecting cyclic changes that indicate wear, the system can schedule pump replacement in advance, extending productive use while preventing reliability failures.
2Reliability
If blood pump replacement is performed early to ensure safety, then reliability is improved, but productivity deteriorates due to premature replacement of consumables
Solution Approach 1:
The system continuously monitors motor phase currents and provides feedback on blood pump health status. By analyzing current stability and cyclic patterns, the system gives real-time feedback on wear progression, enabling clinically justified replacement decisions that balance patient safety with consumable utilization.
3Device complexity
If simple flow-speed matching methods are used to detect blood pump abnormalities, then device complexity is reduced, but measurement precision deteriorates due to inability to distinguish pump abnormalities from pipeline issues
Solution Approach 1:
The system uses motor phase current as an intermediary parameter to indirectly assess blood pump status. Instead of directly measuring pump performance, the system analyzes phase current stability and cyclic changes, which serve as a sensitive indicator of pump wear and abnormalities without requiring complex direct pump measurements.
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 and connected systems, 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
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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.