The low frequency concave-convex piezoelectric ceramic transducer is analyzed theoretically and by finite element method. The transducer has the characteristics of low resonant frequency, low impedance, high response of transmitting voltage, low fluctuation of 360° spatial directivity and high power.
The applications and characteristics of HIFU plate in medical and cosmetic fields:
Focused ultrasound does not heat the skin surface, neither does it need to pass through the skin as a medium for laser energy transfer.so it does not affect the tissue on the skin surface and the tissue through which the laser passes.So it doesn't affect the tissue on the skin surface and the tissue through which the laser passes.There will be no excessive heat residue on the skin surface.Therefore, the epidermis will not be affected by heat. It can reduce the heat reaction easily produced by Orientals and avoid scald.Focused Ultrasound Therapy produces thermal coagulation point in SMAS layer, and thermal effect diffuses outward from the coagulation point, so the heat source is concentrated in SMAS layer, which can produce more collagen denaturation.
Medical uses and characteristics of HIFU:
Ultrasound non-invasive treatment technology has been successfully applied to chronic cervicitis, white lesions of vulva, condyloma acuminatum and other gynecological diseases. It has been tested in more than 1000 hospitals in China (over 70% of them are third-class A hospitals) for many years.
Ultrasound therapy, as a new non-invasive treatment (or non-invasive treatment), treats deep surface tissue without surgical incision (removal) or destruction of surface tissue (skin, mucosa or epithelial tissue) and without puncture. It can focus the ultrasound waves emitted in vitro through the surface tissue, and produce a high-energy area in the deep tissue of the surface tissue. In a short time, the lesion tissue absorbs energy and quickly warms up, and produces biochemical reactions. Finally, it can damage and degenerate the lesion tissue, promote tissue reconstruction and microcirculation improvement, and make the lesion tissue recover. The cavitation effect of ultrasound can make the cell membrane lose continuity or change its permeability. Because the pathological or proliferative tissue is more sensitive to ultrasound, low-energy ultrasound in a specific range can selectively damage the pathological tissue and cells to achieve therapeutic purposes.
chronic cervicitis, white lesions of vulva, condyloma acuminatum.