CANNULA ASSEMBLY WITH MOVABLE AND EXPANDABLE BALLOON

WIPO Patent Application WO/2018/219314

A1

Disclosed is a cannula assembly with a movable and expandable balloon, the cannula assembly comprising a first sealing assembly and a second sealing assembly, wherein the second sealing assembly comprises a lower housing and a hollow cannula connected thereto and extending towards a distal end thereof, the first sealing assembly, the second sealing assembly and the hollow cannula comprise instrument passages communicated and substantially aligned with each other, and the hollow cannula comprises an inner cylindrical surface, an outer cylindrical surface and a cannula wall therebetween; the distal end of the hollow cannula further comprises an open cannula lip; the cannula assembly further comprises an inflatable and expandable balloon assembly, a one-way valve assembly for inflating and deflating same, and a gas flow passage communicating the balloon assembly and the one-way valve assembly; the balloon assembly comprises a balloon lip and a balloon body connected thereto; and the balloon assembly further comprises a movable mechanism, and when the cannula assembly is inserted or removed, the movable mechanism is operated to move from a distal end to a proximal end thereof, such that the balloon body is stretched from a free state into a flat and straight state.

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WO/2004/000142	CATHETER

ZHU MOSHU (CN)

PCT/CN2018/089176

December 06, 2018

May 31, 2018

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5R MED TECH CHENGDU CO LTD (CN)

A61B17/34

CN107049381A	2017-08-18
US8888692B1	2014-11-18
CN103781394A	2014-05-07
CN103281950A	2013-09-04

CHENGDU ZHIJISHI PATENT AGENCY (CN)

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