Collapsible Blood Pump Sheathing for Low-Profile Vascular Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional intravascular blood pumps require both an outer sheath and an introducer, leading to a larger insertion profile and increased vascular complication rates due to material stacking during deployment.
Innovation Solution
A system comprising an introducer with a hub and sheath, and a transfer tool with a sheath, allowing for the collapsible blood pump to be compressed and inserted through a smaller profile, using a one-way valve and seals to maintain vascular integrity, and a method to deploy the pump by advancing it through the sheath into the patient's vasculature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If both an outer sheath and an introducer are used to deploy the blood pump, then the pump can be collapsed for delivery, but the insertion profile becomes larger due to material stacking
Solution Approach 1:
The patent extracts the outer sheath from the delivery system, retaining only the introducer. The blood pump is collapsed directly into the introducer using a compression device, eliminating the need for the outer sheath and reducing material stacking that increases insertion profile.
Solution Approach 2:
The blood pump is nested directly within the introducer without requiring an intermediate outer sheath. The compression device temporarily nests around the pump during compression, then is removed, allowing the pump to expand within the introducer's lumen.
2Reliability
If both an outer sheath and an introducer are used, then the pump can be delivered, but vascular complication rates increase due to larger insertion profile
Solution Approach 1:
By removing the outer sheath from the delivery system, the patent reduces the overall insertion profile and the number of materials in contact with the vasculature, thereby reducing vascular complication rates while maintaining safe delivery of the collapsed pump.
3Volume of moving object
If the blood pump is collapsed into a smaller profile for insertion, then delivery is facilitated, but the structural integrity must be maintained
Solution Approach 1:
The blood pump employs dynamic structural characteristics, transitioning from a collapsed low-profile state during delivery to an expanded operational state at the implantation site. The framework is designed to be compressible yet maintain structural integrity through controlled expansion mechanisms.
Solution Approach 2:
The blood pump's physical parameters, specifically its diameter and volume, are changed from a compressed delivery state to an expanded operational state. This parameter transformation is achieved through the expansion mechanism that maintains structural integrity while facilitating delivery through a smaller profile.
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
Reduces the insertion profile and vascular complications by enabling a collapsible blood pump to be deployed efficiently with minimal trauma, facilitating quick and safe insertion into the patient's vasculature.
Implementation Method 1
a one-way valve disposed in the introducer hub proximal to the introducer sheath lumen and configured to seal against vascular pressure
Implementation Method 2
a seal disposed in the introducer hub proximal to the introducer sheath and configured to seal against vascular pressure around a range of diameters of devices inserted through the seal
Implementation Method 3
a disc valve disposed in the introducer hub proximal to the introducer sheath and configured to seal against vascular pressure around a range of diameters of devices inserted through the valve
Data Source
AI summary
A system for inserting a collapsible blood pump into a patient. In some embodiments, the system includes an introducer, the introducer comprising an introducer hub and an introducer sheath extending distally from the introducer hub, the introducer sheath comprising an introducer sheath lumen, the introducer hub comprising a hub connector and a distal hub lumen surrounding a proximal end of the introducer shaft; and a transfer tool comprising a transfer sheath, the transfer sheath comprising a transfer sheath lumen having a diameter substantially equal to a diameter of the introducer sheath lumen and a transfer tool connector adapted to connect to the hub connector, a distal portion of the transfer sheath extending into the distal hub lumen when the transfer tool connector is connected to the hub connector.