Blood Pump Reactive Power Heating
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Solution Overview
Problem
Existing extracorporeal circulatory support systems cause blood to cool during use, requiring additional equipment and resources for thermal management.
Innovation Solution
An extracorporeal blood circuit with a blood pump and controller that generates reactive power by adjusting the phase angle between voltage and current waveforms, using this power to heat the blood as it passes through the pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blood is pumped through extracorporeal circuits, then blood circulation is restored, but blood temperature decreases
Solution Approach 1:
The patent converts the harmful cooling effect of extracorporeal circulation into a beneficial heating effect by introducing a heating element that utilizes the same blood flow path to deliver thermal energy, thereby transforming the temperature management challenge into an opportunity for efficient heat transfer
Solution Approach 2:
The patent merges the pumping function and heating function into a single integrated blood pump assembly, where the heating element is positioned within the pump housing to directly heat the blood during circulation, eliminating the need for separate thermal management equipment
2Temperature
If additional equipment is added to warm the patient or thermally isolate blood flow, then blood temperature is maintained, but device complexity increases
Solution Approach 1:
The patent combines the blood pump and heating element into a single integrated assembly, where the heating element is positioned within the pump housing to directly heat the blood during circulation, eliminating the need for separate thermal management equipment
Solution Approach 2:
The blood pump assembly serves dual functions: pumping blood through the extracorporeal circuit and simultaneously heating the blood to maintain temperature, thereby eliminating the need for separate warming devices
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
Effectively counteracts blood cooling without the need for additional equipment, maintaining blood temperature within a desired range by generating heat to match the cooling effect.
Implementation Method 1
the controller is configured to drive rotation of the rotor using a voltage waveform and a current waveform, and adjust a phase angle between the voltage waveform and the current waveform to generate reactive power, wherein the generated reactive power facilitates heating blood as the blood passes through the blood pump
Data Source
AI summary
An extracorporeal blood circuit is provided. The extracorporeal blood circuit includes a blood pump including an inlet, an outlet, and a rotor positioned between the inlet and the outlet, and a controller coupled to the blood pump. The controller is configured to drive rotation of the rotor using a voltage waveform and a current waveform, and adjust a phase angle between the voltage waveform and the current waveform to generate reactive power. The generated reactive power facilitates heating blood as the blood passes through the blood pump.