A method of removing human body fatty tissue includes inserting an ultrasonic aspirating probe into the body in the area of the fatty tissue between the flesh, including blood vessels and arteries, and the muscle.
The probe is ultrasonically vibrated at high frequencies and low amplitudes creating localized tissue separation and frictional heat. This heat causes the fatty tissue surrounding the probe to melt. The probe is specially adapted to provide a localized flow of irrigating fluid. This fluid serves to emulsify the melted and separated fat.
The emulsified fat is then aspirated through specially designed orifices from the body using suction.
An ultrasonic probe particularly suitable for ultrasonic diagnostic equipments of the electronic scanning type is made up of a multiplicity of piezoelectric transducer elements, each in the shape of a rectangular plate with electrode films coated on both sides, arranged in a row at intervals and an acoustic impedance matching layer placed on the row of the transducer elements.
The width-to-thickness ratio of each piezoelectric plate takes a value not greater than 0.8 and preferably between 0.4 and 0.7 so that the plate can vibrate in width expansion mode. It is highly preferable that the impedance matching layer has a laminated structure given by two layers which are different in acoustic impedance of the respective materials and individually have definite thicknesses.
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