Bypass Catheter With Semi-Permeable Membrane for Ischemia Relief
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Solution Overview
Problem
Current medical devices, such as balloon catheters and intravascular filters, fail to provide effective and immediate relief for ischemia caused by blood vessel blockages, leading to potential permanent injury due to complete blood flow interruption and the need for separate devices during complex medical procedures.
Innovation Solution
A catheter with a distal end hole and a side hole, incorporating a semi-permeable membrane filter positioned circumferentially, allowing temporary bypass of blood flow and delivery of medications to dissolve clots while preventing backflow, and optionally featuring a balloon and branching structures for enhanced clot management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a balloon catheter is used to block blood flow to a targeted site, then control of blood flow through a portion of the blood vessel is achieved, but blood flow is completely interrupted to other sites near the targeted site
Solution Approach 1:
The catheter is divided into multiple segments with different functionalities: a first segment with a filter for capturing debris, a second segment with a balloon for blocking blood flow, and a third segment for aspiration. This segmentation allows selective control of blood flow to different sites, enabling isolation of the targeted site while maintaining flow to other areas through the filter-equipped first segment.
Solution Approach 2:
The filter-equipped first segment acts as an intermediary between the blocked vessel and the downstream circulation. It captures debris and allows filtered blood to pass through, serving as a mediator that prevents complete interruption of blood flow to non-targeted sites while the balloon blocks flow to the targeted site.
2Reliability
If intravascular filters are used to trap vascular debris, then debris is captured and complications are eliminated, but the device takes time to position and deploy
Solution Approach 1:
The invention merges the filter function, balloon occlusion function, and aspiration function into a single integrated catheter device. The filter is positioned in the first segment, the balloon in the second segment, and aspiration capability in the third segment, allowing all functions to be deployed simultaneously in a single procedure rather than requiring separate devices and multiple deployment steps.
Solution Approach 2:
The catheter is designed as a multi-functional universal device that can perform filtration, balloon occlusion, and aspiration within a single device structure. This universality eliminates the need for multiple separate devices and reduces the overall deployment time while maintaining all necessary functions for comprehensive clot management.
3Adaptability or versatility
If current bypass catheters are designed for surgical implantation, then complex procedures can be performed, but immediate relief of progressive ischemia cannot be achieved
Solution Approach 1:
The catheter incorporates a filter with specific local quality at the first segment to capture debris while allowing blood flow, combined with a balloon at the second segment for localized occlusion. This localized functional differentiation enables the device to provide immediate relief of ischemia through the filter while maintaining the surgical capabilities needed for complex procedures.
Solution Approach 2:
The filter is pre-positioned at the distal end of the catheter before balloon inflation, allowing it to immediately begin capturing debris as blood flows through upon deployment. This preliminary positioning of the filter ensures that immediate relief of ischemia can be achieved upon catheter insertion, before any additional surgical maneuvers are required.
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
Enables rapid restoration of blood flow to prevent ischemic injury, allowing time for clot dissolution and reducing the risk of emboli, with the semi-permeable membrane capturing debris and emboli, thus addressing the limitations of existing devices in managing blood flow and debris during medical procedures.
Implementation Method 1
at least one semi-permeable membrane, such as a filter, that is positioned circumferentially outside of the first segment or second segment of the device
Data Source
AI summary
An innovative medical device that permits rapid, minimally invasive restoration of blood flow across a vascular blockage. A system allowing for lysis or removal of said blockage. Said device creates a temporary bypass using longitudinal structure configured for insertion into the blood vessel and adapted to deliver a side hole to a target area. The side hole defines a distal first segment and a proximal second segment with a lumen to allow blood flow therethrough to at least one distal end hole. Said device includes at least one semi-permeable membrane which may act as a filter that located circumferentially around outer surface of at least one of said device segments. In an alternate embodiment, a slidable outer sheath can cover the side hole to permit reversal of blood flow from the distal end hole to a proximal end hole located outside a patient's body by means of an aspiration controller. Alternate embodiments include an optional anchoring balloon, a macerating stent or wires, perforations for fluid delivery, and a backflow valve.