Bidirectional Blood Pump Eliminates Compliance Chambers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Extravascular pulsation blood pumps face challenges with the need for compliance chambers to store blood temporarily, which are voluminous and energy-intensive, especially when both counterpulsation and copulsation pumps are implanted simultaneously, and existing systems are limited by the use of gas-filled compliance chambers.
Innovation Solution
A bidirectionally acting pulsation blood pump system connected to both a blood vessel and a heart chamber via conduits, utilizing a variable volume pumping system with integrated compliance chambers that act as both pumping and compliance chambers, eliminating the need for separate compliance chambers and allowing for efficient blood flow management without gas-filled chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If gas-filled compliance chambers are used to store blood temporarily in extravascular pulsation blood pumps, then blood storage function is achieved, but the system becomes voluminous and energy-intensive
Solution Approach 1:
The patent combines the compliance chamber and pumping chamber into a single integrated chamber that serves dual functions. The chamber alternates between storing blood (compliance function) and pumping blood (pumping function) through bidirectional flow control, eliminating the need for separate compliance and pumping chambers while maintaining both functions.
Solution Approach 2:
The integrated chamber is designed to perform multiple functions: it serves as both a compliance chamber for blood storage and a pumping chamber for blood ejection. The bidirectional valve system enables the same chamber space to be used for both receiving/storing blood and actively pumping it, maximizing space utilization.
2Quantity of substance
If gas-filled compliance chambers are used in extravascular pulsation blood pumps, then blood storage function is achieved, but energy consumption increases due to compression requirements
Solution Approach 1:
By merging the compliance and pumping chambers into one integrated system, the patent eliminates the energy-intensive gas compression process. The bidirectional valve mechanism allows the chamber to passively receive blood during filling and actively eject it during pumping without requiring external compression energy.
Solution Approach 2:
The patent extracts the gas-filled compliance chamber component entirely from the system, replacing it with a liquid-filled or empty integrated chamber that uses valve-controlled bidirectional flow instead of gas compression to achieve blood storage and ejection functions.
3Adaptability or versatility
If separate compliance chambers are provided for both counterpulsation and copulsation pumps, then both pumping functions are supported, but device complexity and overall size increase
Solution Approach 1:
The patent merges the functionality of separate counterpulsation and copulsation pumps into a single bidirectional pumping system with one integrated chamber. The bidirectional valve mechanism enables the system to perform both counterpulsation (pumping against aortic pressure) and copulsation (assisting ventricular ejection) functions using a single chamber instead of requiring separate compliance chambers for each function.
Solution Approach 2:
The single integrated chamber is designed to be universal, serving both counterpulsation and copulsation functions through bidirectional flow control. The same chamber space and mechanism handle both pumping modes, eliminating the need for duplicate compliance chambers and reducing overall system complexity.
Data Source
AI summary
An extravascular pulsation blood pump possesses a bidirectionally acting pumping system (P, M) having a pump (P) which is connected via a first conduit (L1) to the left ventricle (LV) and via a second conduit (L2) to the aorta (AO). By means of a control means (St), the pump (P) is operated alternately in one and the other direction according to a given cardiac rhythm, so that alternately blood is sucked through the first conduit (L1) and simultaneously blood ejected through the second conduit (L2) to the same extent, on the one hand, and blood is sucked through the second conduit (L2) and simultaneously blood ejected through the first conduit (L1), on the other hand. The pulsation blood pump combines the functions and advantages of an extravascular copulsation pump with those of an extravascular counterpulsation blood pump.