Catheter introducer releasably coupled to a normally expanded stretchable sheath

The expandable sheath system addresses high push forces and multiple component challenges by axially stretching and radially compressing, ensuring minimal vessel trauma and efficient prosthetic device delivery with fewer steps.

WO2025264699A1 Publication Date: 2025-12-26EDWARDS LIFESCIENCES CORP
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Patent Information

Application Number
PCT/US2025/034013
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-06-20
Filing Date
2025-06-17
Publication Date
2025-12-26

AI Technical Summary

Technical Problem

Existing introducer sheaths for delivering prosthetic devices through blood vessels face challenges with high push forces, vessel trauma, and the need for multiple components and steps, which can cause damage and prolong procedures.

Method used

An expandable sheath system that axially stretches and radially compresses, allowing for a reduced profile during advancement, minimizing push forces and requiring only one sheath, with a coupling mechanism for releasable attachment to an introducer.

Benefits of technology

Reduces vessel trauma and procedure time by minimizing push forces, reducing the risk of tears and damage, and simplifying the procedure with fewer components and steps.

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Abstract

Disclosed herein are introducer sheaths and methods of using the same. The sheaths (40) minimize trauma to the patient's vasculature by including an introducer (100) sized and configured to be received within an expandable sheath. The system includes a coupling mechanism (200) for releasably coupling the introducer to the expandable sheath. Engaging the coupling mechanism allows the expandable sheath to move from a first configuration, in which the expandable sheath has a first outer diameter, to a collapsed / narrowed configuration in which the expandable sheath has a second, smaller, outer diameter due to the axially directed force exerted on the expandable sheath by the introducer and / or coupling mechanism as the introducer is advanced within the central lumen of the expandable sheath.
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