Intraluminal Puncture Catheter With Orthogonal Vessel Wall Access
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Solution Overview
Problem
Challenges arise in delivering surgical tools through lumens, particularly when targeting blood vessel walls with acute angles, which can lead to risks due to vessel curvature and fragile tissue, and axial displacement of delivery devices.
Innovation Solution
An intraluminal puncturing system with a flexible positioning arm and a second catheter having an opened distal end, allowing for controlled orthogonal or near-orthogonal puncturing, using a tissue puncturer to pierce the vessel wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tool guide is positioned to deliver a puncturing tool at an acute angle relative to the vessel wall, then the delivery device can be positioned within the blood vessel, but the risk of missed or unintentional puncturing increases due to vessel curvature and fragile tissue
Solution Approach 1:
The tool guide is designed with adjustable angulation capability, allowing the operator to dynamically change the delivery angle from acute to orthogonal (90 degrees) relative to the vessel wall. This dynamic adjustment enables optimal positioning for safe puncturing while maintaining accessibility within curved vessels.
Solution Approach 2:
The system enables change in the geometric parameter of the delivery angle. By adjusting the tool guide to achieve orthogonal delivery (90-degree angle), the patent transforms the delivery parameters to eliminate the risks associated with acute-angle delivery while maintaining the ability to access curved vessel segments.
2Measurement precision
If the angle of penetration of the needle is increased to achieve orthogonal puncture, then the accuracy of puncturing improves, but axial displacement of the delivery device occurs
Solution Approach 1:
The tool guide acts as a counterbalancing structure that compensates for the axial displacement forces generated during orthogonal needle penetration. By providing a stable angled support structure, the tool guide counteracts the tendency of the delivery device to shift axially, maintaining positional stability while enabling accurate orthogonal delivery.
Solution Approach 2:
The tool guide serves as an intermediary component between the delivery device and the needle. It mediates the interaction by providing a stable platform that enables orthogonal needle advancement while isolating the delivery device from the destabilizing axial forces, thus maintaining both accuracy and stability.
3Volume of moving object
If the inner working diameter of the blood vessel is small, then the minimally invasive approach is maintained, but the ability to increase the angle of the tool guide is limited
Solution Approach 1:
The tool guide is designed as a nested structure that can be contained within the catheter during delivery and then deployed to provide orthogonal angulation. This nesting approach allows the system to maintain a small catheter profile for minimally invasive access while providing the functionality of a larger-angle tool guide when deployed within the vessel.
Solution Approach 2:
The tool guide employs dynamic deployment mechanisms that allow it to transition from a compact configuration within the narrow catheter to an expanded orthogonal configuration during use. This dynamic transformation enables full angulation capability despite the limited diameter of the delivery catheter, maintaining both minimally invasive access and operational versatility.
Data Source
AI summary
Devices, systems, and methods for intraluminal puncturing system are disclosed. A first catheter has a flexible positioning arm extending from a distal end thereof and being configured for delivery within an anatomical vessel. The flexible positioning arm is configured to transition between a collapsed orientation and an expanded orientation. A second catheter is disposed within the first catheter and has an opened distal end affixed to the positioning arm such that when the flexible positioning arm is in the expanded orientation, the opened distal end opposes a wall of the anatomical vessel. An elongated shaft is extendable through the second catheter. A tissue puncturer is located on a distal end of the elongated shaft. The tissue puncturer is configured for axial advancement in the second catheter and operably connected to the opened distal end of the second catheter.