Single-operator intracranial microcatheter with variable rigidity
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Solution Overview
Problem
Current catheter systems for stroke intervention are cumbersome and require multiple operators to navigate the complex and tortuous cerebral vasculature, leading to increased procedural time and risk of complications.
Innovation Solution
A rapid exchange microcatheter system and a distal access catheter system that allow for single-operator access to the intracranial neurovasculature, featuring a flexible distal luminal portion and a proximal extension for control, enabling quick and safe delivery of cerebral treatment devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional catheter systems are used for stroke intervention, then devices can be delivered to the target site, but multiple operators are required and procedural time increases
Solution Approach 1:
The patent combines multiple catheter functions into a single integrated catheter system that can be operated by one operator. The catheter integrates the guide catheter, microcatheter, and treatment device delivery capabilities into a unified system, eliminating the need for multiple operators to coordinate separate catheter systems.
Solution Approach 2:
The catheter system is designed with multi-functionality to perform multiple tasks including navigation through the cerebral vasculature, delivery of treatment devices, and aspiration capabilities. This universal design allows a single operator to handle all necessary functions without requiring multiple specialized operators.
2Strength
If rigid catheter structures are used, then structural strength is improved, but the natural tortuosity of cerebral anatomy cannot be maintained
Solution Approach 1:
The catheter employs variable rigidity along its length, with the proximal portion being more rigid for manipulation and the distal portion being more flexible to accommodate cerebral anatomy. This local quality variation allows the catheter to maintain structural strength where needed while preserving the natural tortuosity of blood vessels in the distal region.
Solution Approach 2:
The catheter is divided into distinct segments with different rigidity characteristics. The proximal extension provides structural support while the distal luminal portion maintains flexibility. This segmentation allows each portion to fulfill its specific function without compromising the other.
3Adaptability or versatility
If complex coaxial catheter assemblies are used, then device delivery capability is improved, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates unnecessary intermediate catheters from the traditional multi-catheter coaxial assembly. By using a simplified catheter design that integrates delivery capabilities directly into the catheter structure, the system reduces complexity while maintaining the ability to deliver various treatment devices.
Data Source
AI summary
A rapid exchange microcatheter for accessing the intracranial neurovasculature. A side opening through the sidewall is located a first distance proximal to the distal-most tip. A proximal opening located proximal to the side opening is a second distance from the distal-most tip. A distal, reinforced catheter portion extends between a distal end region to a point near the side opening. A proximal, reinforced catheter portion extends a distance from a point near the side opening towards the proximal end of the catheter body. The side opening is positioned within a gap between a proximal end of the distal reinforced catheter portion and a distal end of the proximal reinforced catheter portion. A payload of a cerebral treatment device is housed within the lumen proximal to the side opening. Related devices, systems, and methods are disclosed.