Piezoelectric driving miniature optical probe for cerebrovascular interventional imaging

By introducing a miniature magnetic ring structure and piezoelectric drive into the cerebrovascular interventional imaging probe, combined with external magnetic field navigation, the problems of miniaturization of catheter diameter, insufficient flexibility, and unstable pre-pressure in cerebrovascular vessels have been solved, achieving high-precision imaging and safe navigation, and significantly improving the probe's performance in complex environments.

CN122004775APending Publication Date: 2026-05-12GUANGZHOU PANYU POLYTECHNIC
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Patent Information

Application Number
CN202610301761.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-12
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

Existing endovascular interventional imaging techniques in cerebral blood vessels suffer from problems such as difficulty in miniaturizing catheter diameter, insufficient flexibility, navigation difficulties, image artifacts, and unstable pre-pressure. In particular, it is difficult to achieve high-precision imaging and safe navigation in tortuous and narrow cerebral blood vessels.

Method used

By employing a micro magnetic ring structure combined with piezoelectric drive, the probe achieves miniaturization and 360° optical scanning through longitudinal torsional mode conversion between a single piezoelectric ceramic sheet and a glass tube substrate. Furthermore, it provides stable pre-pressure and navigation capabilities through external magnetic field-assisted navigation.

Benefits of technology

It has achieved high-precision imaging and safe navigation of miniature optical probes with a diameter of less than 0.4 mm in tortuous and narrow cerebral blood vessels, reducing the risk of artifacts and mechanical damage, and improving the navigation controllability and imaging stability of the probe in complex environments.

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Abstract

The invention relates to the technical field of medical instruments, in particular to a piezoelectric driving miniature optical probe for cerebrovascular interventional imaging, which comprises a glass tube base body, a single piezoelectric ceramic piece and the like, and is characterized in that the glass tube base body is of a hollow cylindrical structure, and an inclined groove is formed in the axial center of the glass tube base body; the single piezoelectric ceramic piece is fixed on the outer side of the glass tube base body. Through a hollow rod type stator structure composed of a single piezoelectric ceramic piece and a glass tube base body with a 10-degree inclined groove, mode conversion from longitudinal vibration to longitudinal-torsional coupling vibration is achieved, an elliptical motion track is formed at the position of a miniature magnetic ring at the front end of the stator, 360-degree optical scanning is achieved through friction driving of a rotor, and the mechanical property of the motor is improved. Compared with a traditional far-end miniature probe with the diameter usually larger than 1.5 mm, the whole outer diameter of the probe is reduced to 0.4 mm, and smooth navigation and passing in tortuous and narrow brain middle artery (the diameter is usually smaller than 0.5 mm) are easier.
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