Wire Centering Sheath for Endovascular Device Positioning
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Solution Overview
Problem
Current methods for centering medical instruments like catheters within body channels during surgical procedures are difficult to control and do not effectively secure the device, risking sub-intimal entry or perforation.
Innovation Solution
A wire centering sheath system with centering wires extending from a sheath to brace against the vessel wall, where a hollow rod deploys the wires to contact the body channel, ensuring accurate positioning of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If guiding by balloons or deflection of the instrument sheath is used to center the device, then the device can be positioned within the body channel, but the approach is difficult to control and does not effectively center the medical instrument
Solution Approach 1:
The device is segmented into a delivery catheter and separate centering wires that can be independently deployed. The centering wires are released from the delivery catheter and positioned against the vessel wall to provide stable centering, separating the centering function from the delivery function and improving both accuracy and control.
Solution Approach 2:
Centering wires serve as intermediary elements between the delivery catheter and the vessel wall. These wires provide a mechanical interface that translates operator control into precise centering action, mediating the interaction between the operator and the vessel wall to achieve accurate positioning without direct catheter-wall contact.
2Reliability
If the catheter tip stability is not prioritized, then the procedure can be performed with standard catheters, but the risk of sub-intimal entry or perforation increases
Solution Approach 1:
The centering wires are deployed in advance before the intervention device is advanced into the vessel. This preliminary centering action establishes a stable reference framework that prevents sub-intimal entry and perforation during subsequent device manipulation, addressing safety concerns before they can manifest.
Solution Approach 2:
The centering wires are nested within the delivery catheter during delivery, then deployed outward to provide centering support. This nested configuration allows the complex centering mechanism to be delivered through a simple catheter structure, maintaining ease of delivery while providing enhanced safety during the procedure.
Data Source
AI summary
The present disclosure is directed, in one embodiment, to a wire centering sheath system in which wires outwardly extend from a sheath to brace against a vessel wall. The wire centering sheath system may be used to center endovascular devices.