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US 2022/0008752 A1Published application
Acoustic device for skin treatment and methods of using the same
AssigneeToosonix A/S
InventorsTomasz Zawada, Torsten Bove
Life of this patent
Estimating the term…
Abstract
Methods of treating the skin and in particular removing pigment from a tattoo are provided. In preferred embodiments, a piezoelectric transducer is placed at a plurality of locations above the skin and focused acoustic waves at 7 MHz or more are transmitted into the skin. The focal point of the focused acoustic waves is between 0.1 mm and 5 mm below the surface of the skin. The design of the piezoelectric transducer along with the frequency of operation are carefully chosen to create points of treatment with a desired size and shape. The correct amount of energy is supplied to the points of treatment to produce a lesion of a desired size and shape. The lesions are spaced and located to effect the treatment of the skin.
Claims24
An acoustic generating device comprising:
- a housing with a first end and a longitudinal axis that extends from the first end along a length of the housing;
- a piezoelectric transducer coupled to the housing and comprising a piezoelectric element in the shape of a focusing bowl wherein the piezoelectric element is designed to have a focal zone that at a 6 dB pressure drop from a center of maximum pressure is 1.5 mm or less in diameter and is 3 mm or less along the longitudinal axis;
- an electrical circuit that is in electrical communication with the piezoelectric element and designed to operate the piezoelectric element at a third, or higher, harmonic resonance frequency;
- an optical monitoring system with an optical axis aligned with the longitudinal axis and wherein the optical monitoring system is coupled to the housing on an opposite side of the piezoelectric transducer to the first end;
- and
- an optically transparent pathway that extends along the longitudinal axis from the optical monitoring system, through the piezoelectric transducer including the piezoelectric element, to the first end.
3 more elements
An acoustic generating device comprising:
- a housing with a first end and a longitudinal axis that extends from the first end along a length of the housing;
- a piezoelectric transducer coupled to the housing and comprising a piezoelectric element in the shape of a focusing bowl wherein the piezoelectric element is designed to have a focal zone that at a 6 dB pressure drop from a center of maximum pressure is 1.5 mm or less in diameter and is 3 mm or less along the longitudinal axis;
- an electrical circuit that is in electrical communication with the piezoelectric element and designed to operate the piezoelectric element at a third, or higher, harmonic resonance frequency;
- an optical monitoring system with an optical axis aligned with the longitudinal axis and wherein the optical monitoring system is coupled to the housing on an opposite side of the piezoelectric transducer to the first end;
- and
- an optically transparent pathway that extends entirely along the longitudinal axis from the optical monitoring system through the piezoelectric transducer, including extending through a center of the piezoelectric element, to the first end.
3 more elements
An acoustic generating device comprising:
- a housing with a first end and a longitudinal axis that extends from the first end along a length of the housing;
- a piezoelectric transducer coupled to the housing and comprising a piezoelectric element in the shape of a focusing bowl wherein the piezoelectric element is designed to have a focal zone that at a 6 dB pressure drop from a center of maximum pressure is 500 μm or less in diameter and is 1.5 mm or less along the longitudinal axis;
- an electrical circuit that is in electrical communication with the piezoelectric element and designed to operate the piezoelectric element at a third, or higher, harmonic resonance frequency;
- an optical monitoring system with an optical axis aligned with the longitudinal axis and wherein the optical monitoring system is coupled to the housing on an opposite side of the piezoelectric transducer to the first end;
- an optically transparent pathway that extends entirely along the longitudinal axis from the optical monitoring system through the piezoelectric transducer, including extending through a center of the piezoelectric element, to the first end, wherein the optical transparent pathway and the optical monitoring system is designed to allow imaging of a patient's skin directly on a user's eye;
- and wherein the piezoelectric transducer is designed to focus acoustic waves generated by the piezoelectric element to a point of treatment that is between 0.1 mm and 10 mm past the first end;
- and
- and wherein the optically transparent pathway allows the optical monitoring system to image a surface of the skin above the point of treatment during operation of the acoustic generating device.
5 more elements
Dependencies are inferred from the claim text.