Dual-Balloon Perfusion Catheter for Aortic Flow and Renal Puncture
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Solution Overview
Problem
Existing endovascular devices for vascular repairs, such as balloon catheters, fail to maintain uninterrupted blood flow in critical vessels like the aorta while isolating the puncture site and adjacent vessels, complicating procedures and potentially affecting success.
Innovation Solution
A dual-balloon catheter system with a compliant perfusion balloon for the aorta and a non-compliant indexing balloon for the renal artery, allowing simultaneous blood perfusion and precise puncture alignment, using a retractable needle for bypass procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single balloon catheter is used for vascular puncture, then the device structure is simple, but it cannot simultaneously maintain uninterrupted blood flow in the main vessel and isolate the puncture site in the branch vessel
Solution Approach 1:
The single balloon catheter is divided into two separate balloons: a first balloon positioned in the main vessel (aorta) to maintain uninterrupted blood flow, and a second balloon positioned in the branch vessel (renal artery) to isolate the puncture site. This segmentation allows each balloon to independently perform its specific function, resolving the contradiction between maintaining blood flow and isolating the puncture site.
Solution Approach 2:
The device transitions from a single-dimensional catheter to a multi-dimensional configuration with balloons positioned in different vascular spaces. The first balloon operates in the main vessel lumen while the second balloon operates in the branch vessel, creating spatial separation that enables simultaneous blood flow maintenance and puncture isolation.
2Productivity
If no isolation mechanism is provided at the puncture site, then the device structure is simple, but the procedure time increases and procedural success is compromised
Solution Approach 1:
The second balloon is inflated before the puncture procedure to pre-isolate the puncture site in the branch vessel. This preliminary action creates a controlled environment for the puncture, preventing blood loss and complicating the procedure, thereby improving productivity without requiring complex real-time isolation mechanisms.
3Measurement precision
If the outlet of the working lumen is not flush with the balloon surface, then the device structure is simple, but the puncture alignment precision is reduced
Solution Approach 1:
The outlet of the working lumen is made substantially flush with the external surface of the first balloon at the specific location where the puncture will occur. This local quality enhancement ensures precise alignment and accurate puncture placement without requiring complex integration mechanisms throughout the entire device.
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 uninterrupted blood flow in the aorta and precise puncture alignment in the renal artery, simplifying vascular bypass procedures and enhancing procedural efficiency and success.
Implementation Method 1
a first inflatable balloon forming an internal passage for allowing perfusion in the main vessel when the inflatable balloon is inflated
Implementation Method 2
isolating the site of a puncture in the vessel as well as in an adjacent vessel
Data Source
AI summary
An apparatus for performing a medical procedure in a main vessel, includes an inflatable perfusion balloon forming an internal passage for allowing fluid flow within the vessel when the balloon is inflated. A shaft connected to the balloon includes an inflation lumen in communication with the perfusion balloon, and a working lumen including an opening for passing a tool, such as a needle for puncturing the vessel. An indexing balloon may be provided for expanding into a branch vessel to orient the working lumen in the direction of the branch vessel, such as to allow for an incision to be made at a desired location for achieving a by-pass. The perfusion balloon may be adapted for receiving a distal end portion of the shaft, which may include an outlet of the working lumen substantially flush with the external surface. Related methods are also disclosed.