Perfusion Balloon Catheter with Expandable Internal Lumen
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Solution Overview
Problem
Standard perfusion balloon catheters face limitations in maintaining prolonged dilatation and perfusion during balloon inflation due to restricted blood or air flow, leading to potential organ damage and temporary relief in medical procedures.
Innovation Solution
A perfusion balloon catheter with an expandable internal lumen that allows continuous flow through an enlarged space, independent of balloon inflation or deflation, utilizing a self- or mechanically expandable stent frame and materials like Nylon-12, PEBA, or polyurethane to ensure sustained perfusion during interventions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If standard balloon catheters are used for dilation, then the procedure is simple and fast, but the duration of inflation is limited and results are temporary requiring serial dilatations
Solution Approach 1:
The catheter is divided into two separate lumens: an inner lumen for balloon inflation and an outer lumen for continuous blood perfusion. This segmentation allows independent control of balloon inflation duration and perfusion flow, enabling prolonged inflation without compromising distal tissue perfusion.
Solution Approach 2:
The outer lumen acts as an intermediary perfusion pathway that bypasses the blocked distal vessel during balloon inflation. Blood flows through the outer lumen to maintain perfusion to distal tissues, allowing the balloon to remain inflated longer without causing ischemia.
2Reliability
If balloon inflation is prolonged to achieve permanent relief, then organ damage and ischemia risks increase, but short inflation provides only temporary relief
Solution Approach 1:
By separating the inflation lumen from the perfusion lumen, the device allows prolonged balloon inflation to achieve permanent stenosis relief while simultaneously maintaining distal perfusion through the outer lumen, thereby avoiding ischemia and organ damage even during extended inflation periods.
Solution Approach 2:
The outer lumen provides continuous blood perfusion to distal tissues throughout the entire duration of balloon inflation. This continuous perfusion action prevents ischemia and allows the balloon to remain inflated as long as needed to achieve permanent relief without causing harmful effects.
3Quantity of substance
If the catheter internal diameter is increased to improve perfusion rate, then more blood can flow, but the catheter profile and deliverability are compromised
Solution Approach 1:
The perfusion function is segmented into a separate outer lumen that can be optimized for blood flow capacity independently of the inner inflation lumen. This allows the outer lumen to have sufficient diameter for adequate perfusion while the overall catheter maintains a compact profile suitable for delivery through vascular access.
Solution Approach 2:
The catheter design transitions from a single-lumen cross-section to a multi-lumen structure, effectively utilizing the radial dimension to provide separate flow pathways. This dimensional change allows adequate perfusion area in the outer lumen while maintaining overall catheter flexibility and deliverability.
Data Source
AI summary
The present invention relates to a perfusion balloon catheter that has an expandable (enlargeable) inner lumen (114) with a novel design feature that allows a continuous flow through this enlarged lumen sufficient perfusion to the distal lumen of the blood vessel or air passage concurrent to and independently of balloon (104) inflation or deflation resulting in the prolonged dilatation and avoiding the high risks of blood or air flow stricture during balloon inflation.