A cryoinflated balloon

By designing a double-layer structure for the cryoexpansion balloon, combining an internal cryoballoon and an external expansion balloon, it is possible to perform balloon expansion and cryotherapy simultaneously on a single device, solving the problem of the existing technology that cannot achieve high-pressure expansion and multiple treatments of multiple stenosis, and achieving safe and effective treatment effects.

CN111631807BActive Publication Date: 2025-09-23ACCUTARGET MEDIPHARMA (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202010515808.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-06-09
Publication Date
2025-09-23
Estimated Expiration
2040-06-09

AI Technical Summary

Technical Problem

Existing treatment methods cannot achieve simultaneous balloon dilation and cryotherapy on a single device. Existing dilation balloons cannot have a freezing function, existing cryoballoons cannot achieve high-pressure dilation, and existing devices cannot solve the problem of multiple stenosis requiring multiple dilations and multiple freezing.

Method used

A cryodilator balloon is designed, comprising an outer balloon assembly and an inner balloon assembly. The outer balloon assembly comprises an expansion balloon and an outer catheter, and the inner balloon assembly comprises a cryoballoon, an inner catheter, a filling tube and a rear handle. Through the double-layer structure of the internal cryoballoon and the external expansion balloon, the combination of balloon expansion and cryotherapy is achieved. The inner balloon assembly is axially and radially adjustable relative to the outer balloon assembly, thereby achieving free adjustment of the freezing position.

Benefits of technology

It achieves safe and effective balloon dilatation and cryotherapy on a single product, avoids blockage or poor freezing effect caused by the mixing of dilatation fluid and refrigerant gas, and can perform large-area precise freezing under a single dilatation for multi-segment stenosis, reducing the tediousness of surgical operations and patient pain.

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Abstract

The present invention provides a cryo-expansion balloon, comprising: an outer balloon assembly, comprising a connected expansion balloon, an outer catheter, and a front handle with a filling cavity; an inner balloon assembly, comprising a cryo-balloon located in the expansion balloon, an inner catheter located in the outer catheter, a filling tube, an air inlet pipe, and a rear handle with a return cavity and a filling hole; the cryo-balloon is connected to the return cavity through the inner catheter; the filling tube is passed through the cryo-balloon and the inner catheter, one end of the filling tube passes through the cryo-balloon and is connected to the expansion balloon, and the other end extends out of the inner catheter and is connected to the filling hole; a first air hole and a second air hole are further provided on the rear handle, the first air inlet hole is connected to the return cavity, and inflation or exhaust of the cryo-balloon is achieved through the first air hole, the return cavity, and the inner catheter; the air inlet pipe is passed through the cryo-balloon, the inner catheter, and the return cavity, and one end of the air inlet pipe is located in the cryo-balloon, and the other end is connected to the second air hole, and refrigerant gas is input into the cryo-balloon through the second air hole and the air inlet pipe.
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