Expandable Intravascular Blood Pump Housing With Integrated Lead Trough
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Solution Overview
Problem
Existing intravascular blood pump devices face limitations in reducing their crossing profile due to the need for integrated motors, which complicates atraumatic intravascular translation and positioning, and they do not optimize blood flow through the inflow region, leading to potential thrombosis and hemolysis issues.
Innovation Solution
The design incorporates an expandable housing region with a non-expandable impeller and inlet region, allowing for a constant diameter during delivery and rotation, and integrates a lead trough within the housing to reduce the profile of electrical leads, using materials like Nitinol and polymers for expansion and collapse, and features a flexible housing to accommodate the impeller and inlet apertures without changing diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an integrated motor is incorporated into the blood pump device, then the device can be self-powered, but the crossing profile increases and atraumatic intravascular translation becomes difficult
Solution Approach 1:
The motor is extracted from the device body and positioned externally, connected via a drive shaft. This separates the pumping function (inside vessel) from the power source (outside vessel), enabling a small crossing profile while maintaining self-powered operation through percutaneous motor connection
Solution Approach 2:
The device is segmented into distinct functional modules: an intravascular pump unit with impeller and housing for blood flow, and an extracorporeal motor unit for power provision. This segmentation allows each component to be optimized independently for its specific function while connected through a minimal-profile drive shaft
2Length of moving object
If the housing diameter is reduced for easier delivery, then the crossing profile improves, but blood flow optimization and thrombosis prevention become compromised
Solution Approach 1:
The housing incorporates an expandable section that transitions from a compressed low-profile state during delivery to an expanded functional state upon deployment. This dynamic transformation allows the housing to achieve a small diameter for easy intravascular translation while providing sufficient volume and surface area for optimal blood flow and thrombosis prevention at the functional site
Solution Approach 2:
The device is delivered in a pre-compressed low-profile configuration through the catheter, then expanded at the target location. This preliminary compression allows safe delivery through narrow vasculature, while subsequent expansion creates the necessary housing volume for effective blood flow management and thrombosis prevention
3Length of moving object
If electrical leads are integrated into the housing, then the crossing profile is reduced, but the complexity of lead insulation and spacing increases
Solution Approach 1:
Multiple electrical leads are merged and routed through a common integrated lead trough structure within the housing. This consolidation approach reduces the overall space required for lead accommodation while maintaining necessary insulation and spacing through the unified trough design, thereby reducing the crossing profile without proportionally increasing complexity
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
This configuration enables a lower crossing profile, reduces thrombosis and hemolysis risks, and allows for efficient blood flow optimization by maintaining a consistent housing diameter and integrating electrical leads within the housing, enhancing the device's atraumatic delivery and operational efficiency.
Implementation Method 1
using materials like Nitinol and polymers for expansion and collapse
Data Source
AI summary
The present invention provides an intravascular blood pump comprising a housing region that may be expandable, wherein the housing region comprises at least one trough extending along and/or around at least a portion of the length of the housing region, wherein the integrated lead trough(s) may be defined by or within the housing region. The integrated lead trough(s) may be configured to receive one or more electrical leads therein that may be in operative connection with a sensor and/or working element.