Hemostasis valve for sheath assembly

The introducer sheath assembly with a thick-framed hemostasis valve and dual sealing mechanisms addresses excessive blood leakage by securely sealing various medical devices, ensuring effective hemostasis during insertion and removal.

AU2020382636B2Pending Publication Date: 2026-07-09ABIOMED INC
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Patent Information

Authority / Receiving Office
AU · AU
Patent Type
Applications
Current Assignee / Owner
ABIOMED INC
Filing Date
2020-11-13
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

Existing introducer sheaths suffer from excessive blood leakage due to damage or perforation of the hemostasis valve, particularly when medical devices like heart pumps are inserted, as they lack effective sealing mechanisms for various device sizes and shapes.

Method used

The introducer sheath assembly features a hemostasis valve with a frame portion thicker than the valve portion, formed from incompressible elastomers, and a hub/hub cap assembly that provides dual modes of sealing: radial interference through slits and volumetric interference via a valve seat feature, ensuring secure sealing despite varying device diameters.

Benefits of technology

The assembly effectively reduces or eliminates blood leakage during medical device insertion by maintaining hemostasis, accommodating devices of different sizes with controlled insertion forces, and preventing fluid loss through the sheath assembly.

✦ Generated by Eureka AI based on patent content.

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Abstract

An introducer sheath assembly for percutaneously delivering a medical device that maintains hemostasis in a patient. The assembly has a hub, a hub cap and a hemostasis valve. The introducer sheath assembly has a longitudinal axis and a lumen formed therein. The hemostasis valve has a frame portion and a valve portion, the valve portion having a plurality of slits that are offset through the thickness of the valve portion therein and an extension of the frame portion formed from an incompressible material. The extension of the frame portion is received by a valve seat feature in the hub, when the valve is received by the hub. The valve seat feature also receives a seating portion of the hub cap as the hub and hub cap are advanced into engagement, the seating portion of the hub cap advanced into the valve seat feature subjecting the incompressible extension of the frame portion to a compressive force.
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