Skin treatment using variable rf

Abstract

A skin treatment device used for cellulite treatment, skin tightening or body contouring which combines negative pressure treatment and RF treatment, where the RF treatment uses variable frequencies during a treatment cycle.

1 . A system for treating skin, comprising:
 a negative pressure outlet suitable for application of negative pressure to an area of skin;   a plurality of RF electrodes suitable to emit a plurality of RF energy frequencies to said area of skin; and   a frequency controller configured to vary a frequency of said RF energy frequencies emitted by said electrodes.   
     
     
         2 . The system according to  claim 1  wherein said negative pressure is from 0.2 to 1 atmosphere. 
     
     
         3 . The system as in  claim 1 , wherein said frequencies are between 0.8 MHz and 2.4 MHz. 
     
     
         4 . The system as in  claim 1 , wherein said controller is to vary said RF energy frequencies in a single treatment cycle. 
     
     
         5 . The system as in  claim 4 , wherein said treatment cycle comprises three pulses of 350 milliseconds each. 
     
     
         6 . The system as in  claim 4 , wherein said RF energy frequencies in said single treatment cycle include 0.8 MHz, 1.5 MHz and 2.4 MHz. 
     
     
         7 . The system as in  claim 6 , wherein said single cycle is divided into three segments, during a first of said three segments lasting 40% of a period of said cycle, RF energy of 0.8 MHz is emitted by said electrodes, during a second of said three segments lasting 30% of a period of said cycle, RF energy of 1.5 MHz is emitted by said electrodes, and during a third of said three segments lasting 30% of a period of said cycle, RF energy of 2.4 MHz is emitted by said electrodes. 
     
     
         8 . The system according to  claim 1 , wherein a power of the RF energy is between 1 to 200 watts. 
     
     
         9 . The method according to  claim 1 , wherein the treatment involves treating subcutaneous adipose tissue. 
     
     
         10 . A method of skin treatment, comprising:
 applying a negative pressure during a period to an area of skin to be treated; and   emitting during said period onto said area a plurality of pre-defined RF frequencies, each for pre-defined intervals, a first of said frequencies directed to a first layer of adipose tissue in said area, and a second of said frequencies directed to adipose tissue in a second layer of said area.   
     
     
         11 . The method as in  claim 10 , wherein said emitting said plurality of pre-defined RF frequencies comprises emitting during a first interval RF energy at a frequency of 0.8 MHz, emitting during a second interval RF energy at a frequency of 1.5 MHz, and emitting during a third interval RF energy at a frequency of 2.4 MHz. 
     
     
         12 . The method as in  claim 10 , wherein said emitting for pre-defined intervals comprises emitting said plurality of RF frequencies for intervals of between 100 milliseconds and 300 milliseconds per interval. 
     
     
         13 . The method as in  claim 10 , further comprising emitting said plurality of RF frequencies at a constant power rate. 
     
     
         14 . The method as in  claim 10 , wherein said applying negative pressure comprises applying negative pressure for pre-defined intervals during said period. 
     
     
         15 . A method for tightening an area of skin, comprising:
 selecting a depth of said skin to be tightened;   selecting a frequency of RF energy to be applied to said skin, said frequency corresponding to said depth of said skin to be tightened; and   applying said selected frequency of said RF energy to said depth of said skin to be tightened.   
     
     
         16 . The method as in  claim 15 , wherein said selecting a depth of said skin comprises selecting a depth of skin to be tightened of between 0.25 mm and 5 mm, and wherein said selecting a frequency of RF energy to be applied to said skin, comprises selecting a frequency of between 0.8 MHz and 2.4 MHz. 
     
     
         17 . The method as in  claim 16 , further comprising applying a negative pressure to said area of skin to bring said area of skin into contact with an electrode from which said RF energy is emitted. 
     
     
         18 . The method as in  claim 16 , further comprising selecting a power level of said RF energy to be applying to said depth of said skin, said power level between 1 watt and 200 watts.