Percutaneous Heart Pump Interface for High-Flow Rapid Deployment
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Solution Overview
Problem
There is a need for improved mechanical circulatory support devices that can be inserted minimally-invasively, provide elevated flow rates, reduce the risk of hemolysis and thrombosis, and support both the left and right sides of the heart, while being quick to set up and deploy for treating acute heart failure.
Innovation Solution
A percutaneous catheter pump system with a collapsible impeller assembly that can be inserted through a small incision, featuring a priming apparatus to expel air, and a console with a removable interface member for easy and secure connection to the catheter assembly, enabling high flow rates and simultaneous fluid and electrical communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed cross-section ventricular assist device is designed to provide near full heart flow rate, then flow rate is improved, but the device becomes too large to be advanced percutaneously
Solution Approach 1:
The catheter pump employs a collapsible impeller assembly that can transition between expanded and collapsed states. The impeller is collapsible along its longitudinal axis, allowing the device to be compressed to a small profile for percutaneous insertion and then expanded at the target site to provide full heart flow rate support. This dynamic transformation resolves the contradiction between device size and flow rate capability.
2Productivity
If the flow rate of a rotary pump is increased by rotating the impeller faster, then productivity is improved, but the risk of hemolysis increases
Solution Approach 1:
The invention changes the operational parameters of the pump by using a collapsible impeller design that allows for optimized rotational speeds. The impeller can be collapsed to reduce rotational inertia and then expanded to achieve desired flow rates at lower, safer rotational speeds, thereby reducing hemolysis risk while maintaining productivity.
3Adaptability or versatility
If a console with multiple fluid connections is used to control catheter assembly, then functionality is improved, but the setup time and complexity increase
Solution Approach 1:
The console integrates multiple fluid delivery and waste removal connections into a unified system that interfaces with the catheter assembly through a single docking station. This merging of multiple functions into one integrated interface reduces setup time and complexity while maintaining full fluid control capability.
Solution Approach 2:
The console is designed with universal interfaces that can handle both infusate delivery and waste fluid removal through the same connection point. This multi-functional design allows a single interface to perform multiple operations, reducing the number of separate connections needed and thereby reducing setup time.
4Ease of operation
If a percutaneous insertion method is used to minimize invasiveness, then ease of operation is improved, but the available flow rate may be insufficient
Solution Approach 1:
The catheter pump system employs a nested structure where the collapsible impeller assembly is contained within a delivery catheter. The impeller can be compressed to fit within the catheter for percutaneous insertion, then expanded at the target site to provide sufficient flow rate. This nesting approach allows minimally-invasive insertion while maintaining the capability for high flow rate support.
Data Source
AI summary
A motor system for a percutaneous heart pump includes a drive assembly that includes a motor and a housing having a proximal end and a distal end. The distal end of the housing is configured for coupling to a driven assembly. A first conduit is coupled to the proximal end of the drive assembly housing. The first conduit comprises an elongate tubular member including a communication interconnection line for transmitting communications from a remote console to the motor assembly. A second conduit is coupled to the proximal end of the drive assembly housing. The second conduit is configured for carrying a fluid between the remote console and the motor assembly.