Intravascular Pump Handle with Display and External Motor Segmentation
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Solution Overview
Problem
Existing intravascular blood pumps face challenges such as limited collapsibility due to integrated motors, increased thrombosis risk from stationary surfaces, and high crossing profile due to electric leads, which hinder efficient blood flow and delivery through the heart.
Innovation Solution
The design features an expandable housing region with a support structure and a polymer coating that maintains a constant diameter during delivery and operation, eliminating unnecessary flow inducers and diffusers, and integrates a handle with controls and a display for real-time monitoring, allowing for external motor operation and reduced profile electrical leads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an integrated motor is used within the pump housing, then the pump can be self-contained and easier to deliver, but the collapsibility of the housing is limited and the crossing profile increases
Solution Approach 1:
The pump system is divided into two separate components: an intravascular pump unit with impeller and housing that can collapse, and an external motor unit. This segmentation allows the pump housing to be collapsible for delivery while the motor provides power from outside the vessel, resolving the contradiction between self-contained design and collapsibility.
Solution Approach 2:
The motor is moved from the intravascular space to the extracorporeal space, effectively moving the power source to another dimension (outside the body). This allows the intravascular pump housing to be minimized and collapsed for delivery through vessels while still providing full motor function from the external unit.
2Ease of operation
If stationary surfaces (flow inducers and diffusers) are included in the pump, then blood flow can be directed and controlled, but the risk of thrombosis increases due to blood stasis on stationary surfaces
Solution Approach 1:
The flow inducer and diffuser components are completely removed from the pump design. Instead of using stationary surfaces to direct blood flow, the invention relies solely on the rotating impeller to provide both pumping action and flow direction, eliminating the stationary surfaces that cause blood stasis and thrombosis.
Solution Approach 2:
Instead of using the conventional approach of stationary inducers and diffusers to control flow, the invention inverts the approach by using only the rotating impeller for both pumping and flow direction. The housing is designed to be collapsible without internal flow-directing structures, reversing the traditional design paradigm.
3Use of energy by moving object
If electric leads are integrated into the pump housing, then power can be delivered to the motor, but the crossing profile of the device increases
Solution Approach 1:
The electric leads and power delivery system are extracted from the intravascular pump housing and relocated to an external console. This allows the pump housing to be minimized to only the essential impeller and housing structure, dramatically reducing the crossing profile while power is delivered through external wiring to the implantable motor unit.
4Length of moving object
If the pump housing is made collapsible for delivery, then the device can be delivered through smaller vessels, but the structural integrity and support for the impeller are compromised
Solution Approach 1:
The housing is designed with dynamic structural properties that allow it to transition between a collapsed state for delivery and an expanded state for operation. The housing includes support structures that provide rigidity when expanded to protect the impeller, while allowing compression during delivery through the catheter.
Solution Approach 2:
The impeller is nested within the pump housing in a configuration that allows the housing to collapse around the impeller during delivery. The impeller can be positioned within the collapsed housing structure, and the housing expands after delivery to provide the necessary structural support for impeller rotation and blood pumping.
Data Source
Figure 1
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AI summary
The present invention provides an intravascular blood pump comprising a handle in operational connection and communication with a rotational motor and impeller assembly that is configured for placement and positioning within a patient's vasculature. The handle comprises a display for displaying real-time physiological parameters associated with the blood pump procedure and controls for modifying operational parameters. In some embodiments, the display portion of the handle may be connected and/or disconnected from the non-display portion to allow re-use of the display portion in subsequent blood pump procedures.