High power density piezoelectric transducer for ultrasonic surgical instrument

Abstract

The invention relates to a high power density piezoelectric transducer for an ultrasonic surgical instrument. The existing product has small ultrasonic power. The high power density piezoelectric transducer comprises a plurality of groups of piezoelectric transduction units, wherein a solid trumpet-shaped deformation transformation block is arranged between every two adjacent piezoelectric transduction units, and insulation layers are arranged between the piezoelectric transduction units and the deformation transformation blocks. Each piezoelectric transduction unit comprises a plurality of disc piezoelectric sheets which are coaxially arranged, metal electrodes are respectively arranged on the surfaces of the disc piezoelectric sheets, and two cone frustum-shaped metal caps are arranged between every two adjacent piezoelectric sheets. All the piezoelectric transduction units have the same height, the diameters of the piezoelectric sheets of the plurality of piezoelectric transduction units are sequentially reduced, and all the deformation transformation blocks have the same height. The center distance between two adjacent piezoelectric transduction units satisfies the dispersion equation. With the high power density piezoelectric transducer, the electroacoustic conversion efficiency is effectively increased, the ultrasonic irradiation directivity is improved, and the ultrasonic energy of a local area is improved within a limited space.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a high power density piezoelectric transducer applied to an ultrasonic scalpel system, and is a supporting part of the ultrasonic scalpel system. Background technique [0002] In the 1970s, minimally invasive techniques developed rapidly. At present, minimally invasive surgery has been applied to nearly 10 operations including general surgery, obstetrics and gynecology, cardiothoracic surgery, urology, pediatric surgery, orthopedics, brain surgery and ophthalmology. The development of minimally invasive surgery has led to the development of surgical instruments, such as endoscopic ultrasound, ultrasonic knife, micro-surgical instruments, and various endovascular cutting and staplers. Surgical instruments that emerged in turn promoted the development of minimally invasive surgery, and gradually developed into a branch of the medical device industry. [0003] The ultrasoni...

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Problems solved by technology

[0004] However, at present, this surgical method still has problems such as low ultrasonic power, and the cutting rate of large blood vessels, especially fat-rich tissues, is greatly reduced.

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