Platinum-Cobalt-Boron Magnetic Impeller for Miniaturized Blood Pumps
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Solution Overview
Problem
Current Ventricular Assist Devices (VADs) face limitations in miniaturization and streamlining due to inadequate magnetic, mechanical, and biocompatible properties of their impellers, which hinder further advancements in blood pump efficiency and surgical invasiveness.
Innovation Solution
A magnetic impeller comprising an alloy with specific atomic percentages of platinum, cobalt, and boron, providing enhanced magnetic, mechanical, and biocompatible properties, allowing for increased efficiency and miniaturization by eliminating the need for conventional magnet assemblies and support structures, and enabling a single-piece, biocompatible design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional magnet assemblies and support structures are used in the impeller, then the impeller can provide sufficient magnetic properties, but the device size increases and miniaturization is limited
Solution Approach 1:
The patent changes the material composition parameters by using a platinum-cobalt-boron alloy with specific atomic percentages (12-14% boron, platinum-to-cobalt ratio of 0.90 to 1.2) to achieve high magnetic coercivity and magnetic properties in a single-piece impeller, enabling miniaturization without sacrificing magnetic performance
Solution Approach 2:
The patent employs a composite alloy material combining platinum, cobalt, and boron in specific proportions to create a single-piece impeller that integrates both magnetic and structural functions, eliminating the need for separate magnet assemblies and support structures
2Device complexity
If the impeller is designed as a single-piece structure, then manufacturing complexity is reduced and biocompatibility is improved, but achieving sufficient magnetic properties becomes more difficult
Solution Approach 1:
The patent modifies the chemical composition parameters of the alloy (specific atomic percentages of boron, platinum, and cobalt) to achieve high magnetic coercivity and magnetic properties while maintaining a simple single-piece structure, resolving the conflict between structural simplicity and magnetic performance
3Volume of moving object
If the VAD is miniaturized, then surgical invasiveness is reduced and recovery time is shortened, but blood pump efficiency decreases due to inadequate magnetic properties
Solution Approach 1:
The patent optimizes the alloy composition parameters (boron content at 12-14%, platinum-to-cobalt ratio of 0.90 to 1.2) to achieve high magnetic coercivity and magnetic efficiency, enabling the VAD to be miniaturized while maintaining or improving blood pump efficiency through the superior magnetic properties of the alloy
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
The impeller achieves greater efficiencies between the rotor and stator, facilitating further miniaturization and less invasive surgical techniques, leading to shorter recovery times and improved blood pump performance.
Implementation Method 1
a magnetic impeller for a blood pump, such as, for example, a rotary VAD The magnetic impeller for a blood pump according to the invention comprises a magnetic alloy including platinum, cobalt, and boron
Data Source
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AI summary
A magnetic impeller for a blood pump such as a magnetically driven, rotary ventricular assist device for pumping blood of a patient, the impeller comprising a magnetic alloy including platinum, cobalt, and boron.