dilatation balloon

By setting a limiting structure between the balloon and the stent and designing a balloon structure with a protruding middle part, local pressurized expansion of a specific area of ​​the stent is achieved, solving the problems of poor stent fitting and anchoring effect in the existing technology, and improving the treatment effect and applicability.

CN120361399BActive Publication Date: 2025-09-16HANGZHOU EXCEED MEDICAL TECH CO LTD
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Patent Information

Application Number
CN202510873645.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-06-27
Publication Date
2025-09-16
Estimated Expiration
2045-06-27

AI Technical Summary

Technical Problem

The fixed connection method between the balloon and the stent in the existing technology lacks controllable pressurization capability, making it difficult to achieve effective expansion in irregular calcified lesions or local severe stenosis, resulting in poor stent fit and anchoring effect, affecting the treatment effect and clinical applicability.

Method used

An expansion balloon is designed. By setting a limiting structure between the catheter and the stent and combining it with a balloon structure with a protruding middle part, relative movement between the balloon and the stent is allowed in the axial direction, thereby achieving local pressurized expansion of a specific area of ​​the stent.

Benefits of technology

It improves the fit and anchoring effect of the stent in irregular calcified lesions, enhances the targetedness and safety of treatment, and significantly improves the overall treatment effect and clinical applicability.

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Abstract

The present invention discloses an expansion balloon, comprising a catheter, a balloon body sleeved on the catheter, and a stent sleeved on the balloon body. The stent comprises a stent body sleeved on the outside of the balloon body and a plurality of anchoring members arranged on the outer surface of the stent body. The plurality of anchoring members are configured to penetrate calcified lesions on the inner wall of a blood vessel when the stent body is in an expanded state. When the balloon body is filled, a middle portion of the balloon body forms a profile with a significantly protruding relative end portion relative to the middle portion. The catheter is provided with a first limiting structure, and the stent body is correspondingly provided with a second limiting structure. The first limiting structure and the second limiting structure can cooperate with each other to allow a certain relative movement between the catheter and the stent body in the axial direction, and to achieve localized pressurization and expansion of a specific area of ​​the stent body using the middle portion of the balloon body. This not only improves the conformability and anchoring effect of the stent in irregular calcified lesions, but also enhances the targetedness and safety of the treatment.
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