Medical instrument

US12239324B2 · kind B2 · utility

Assignee

• SHANGHAI MICROPORT CARDIOADVENT CO., LTD. · CN

Inventors

• Yi ZHOU · Nanhu, CN
• Tianyu Liu · Santa Cruz, US
• Zexun ZHU · Shanghai, CN
• Yao Yao · San Mateo, US
• Junfei LI · West Street, CN

Key dates

• Filing date: Oct 20, 2020
• Grant date: Mar 4, 2025
• Expiry date: Dec 6, 2041

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2017/12054
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A medical instrument (1000) includes a stent (100) and a constraining structure (300). The constraining structure (300) constrains, and thereby prevents tangling of, a trailing section of the stent (100), ensuring successful release of the stent (100). Specifically, the stent (100) has a first proximal end and an opposing first distal end. The first distal end is configured with an expanded configuration and a collapsed configuration. The trailing section at the first distal end includes a number of protrusions (111). The constraining structure (300) includes a body (310) and a clamping mechanism (320). The clamping mechanism (320) is disposed at a distal end of the body (310), and the body (310) extends from the first proximal end to the first distal end. The clamping mechanism (320) limits relative movement and thus prevents tangling of the protrusions (111) by passing through all or some of the protrusions (111). Additionally, it allows the stent (100) to be less deformed within a delivery sheath and thereby enables it to successfully expand when pushed out of the sheath.