Balloon device for minimally invasive reduction and fixation of intra-articular fractures

By coordinating the control of the support and propulsion mechanisms of the airbag, and utilizing pressure sensors and electric actuators, accurate docking and stable fixation of the support with the fracture ends are achieved. This solves the problems of uneven reduction and multi-segment fracture control in traditional intra-articular fracture surgery, and improves the safety and stability of minimally invasive treatment.

CN122350848APending Publication Date: 2026-07-10SHANGHAI PUDONG NEW AREA PEOPLES HOSPITAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI PUDONG NEW AREA PEOPLES HOSPITAL
Filing Date
2026-05-26
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Traditional intra-articular fracture surgery involves large incisions for open reduction, which increases intraoperative bleeding and infection risk. The reduction may also be uneven. As a result, there is a growing demand for minimally invasive treatment. However, when multiple airbags are inflated to push the fracture ends down, it is difficult to ensure the accuracy and stability of the reduction of multiple fracture segments.

Method used

The system employs a support airbag mechanism and a propulsion airbag mechanism within the cannula. Pressure sensors and electric actuators work together to control the fit of the support to the fracture ends. The support provides stable support and accurate alignment, and the fracture ends are fixed with adhesive.

Benefits of technology

It improves the accuracy and stability of multi-segment fracture repositioning, reduces the risk of intraoperative bleeding and infection, and enhances the safety and stability of fracture reduction.

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Abstract

This invention relates to the field of medical device technology, specifically to a balloon device for minimally invasive reduction and fixation of intra-articular fractures. The device includes a cannula, within which an arthroscope slides and engages. A delivery tube for transporting the reduction balloon body also slides and engages within the cannula. The reduction balloon body includes a support balloon mechanism for transporting a support structure and a propulsion balloon mechanism for moving the fracture ends. The support balloon mechanism includes a clamping end and several movable ends. One end of the clamping end is detachably connected to the delivery tube, and a groove for placing the support structure is formed within the clamping end. The movable ends are fixedly connected to both sides of the clamping end. A base plate is fixedly connected within the groove, and several pressure sensors are fixedly connected to the base plate for measuring pressure data when the support structure contacts the fracture ends. The pressure sensors are electrically connected to a display panel for displaying the pressure data. This invention ensures accuracy during the docking of multiple fracture ends and improves the stability of the fixed fracture ends.
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