Battery-free flexible implantable deep brain stimulator, battery-free flexible implantable deep brain stimulator system and preparation method

Abstract

The invention discloses a battery-free flexible implantable deep brain stimulator, a battery-free flexible implantable deep brain stimulator system and a battery-free flexible implantable deep brain stimulator preparation method, and belongs to the field of implantable biomedical equipment. Comprising a piezoelectric device used for receiving a pulse ultrasonic signal with the fundamental frequency of 1 MHz emitted by an in-vitro ultrasonic generator and generating an alternating current signal with the stimulation frequency and the stimulation duration consistent with those of the pulse ultrasonic signal through the piezoelectric effect; the rectifying circuit is used for converting the alternating-current electric signal into a direct-current electric signal; the stimulating electrode is used for applying a direct-current electric signal to a target brain region; the piezoelectric device is a piezoelectric array composed of a plurality of square Sm doped PMN-PT piezoelectric single crystal blocks with the center frequency of 1 MHz. Square Sm-doped PMN-PT piezoelectric single crystal blocks with the center frequency being 1 MHz are adopted to form the piezoelectric array, and due to the fact that the Sm-doped PMN-PT array of a specific structure is adopted, it is ensured that the maximum output power can be obtained in the resonant state with the resonant frequency being 1 MHz, and wireless, battery-free and safe real-time deep brain stimulation is achieved.

Description

technical field [0001] The invention belongs to the field of implantable biomedical equipment, and more particularly, relates to a battery-free flexible implantable deep brain stimulator, a system and a preparation method. Background technique [0002] Implantable biomedical devices have shown many advantages in improving the quality of life of patients, but powering these devices remains a technical challenge. Traditional external power solutions require percutaneous or percutaneous leads, which are bulky and susceptible to infection, especially for long-term applications. Integrating batteries with implanted devices is another option, but batteries must be replaced regularly because of their limited energy capacity, causing postoperative pain and financial burden to patients. Achieving battery-free, wireless neural stimulation is of great significance in the biomedical field. Compared with existing wireless energy transfer modalities, ultrasound can achieve longer propag...

AI Technical Summary

Problems solved by technology

However, the new material is currently mostly used in ultrasound imaging and signal detection, and no one has applied it to ultrasound-driven wireless energy harvesting

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