# US 8,540,703 B2 · Methods for treating skin conditions using laser > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,703 B2 - Document ID: US8540703B2 - Status: Granted - Kind: B2 - Application number: 13/279,888 - Filed: 2011-10-24 - Published: 2012-02-16 - Granted: 2013-09-24 - Earliest claimed: 2005-12-23 - Assignees: Lutronic Corporation - Applicants: Hae Lyung Hwang; Sung Huan Gong; Jing Mei Li - Inventors: Hae Lyung Hwang; Sung Huan Gong; Jing Mei Li - Web page: https://patentgrep.com/patent/US8540703B2 ## CPC - A61N 5/0616: {Skin treatment other than tanning} - A61N 5/062: {Photodynamic therapy, i.e. excitation of an agent} - A61N 5/067: using laser light - A61N 2005/0659: {infrared} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## Abstract Methods of treating a portion of skin are disclosed. A carbon lotion is applied to a portion of skin comprising one or more enlarged pores or one or more indicators of aging. The carbon lotion is allowed to remain on the portion of skin for a period of time, and, upon expiration of the period of time, excess carbon lotion is removed from the portion of skin. The portion of skin is irradiated with one or more first laser pulses and one or more second laser pulses. A laser producing the first and second laser pulses has an oscillation wavelength of 1064 nm. ## Claims ### Claim 1 A method of treating a portion of skin, the method comprising: applying a carbon lotion to a portion of skin irradiating the portion of skin with one or more first laser pulses, wherein each of the one or more first laser pulses has a first pulse width in a range of 100 μs to 1000 μs; and irradiating the portion of skin with one or more second laser pulses, wherein a laser producing the first and second laser pulses has an oscillation wavelength of 1064 nm, wherein each of the one or more second pulses has a second pulse width in a range of about 5 ns to about 50 ns. ### Claim 2 (depends on 1) The method of claim 1, wherein the laser comprises a pulsed Nd:YAG laser. ### Claim 3 (depends on 1) The method of claim 1, wherein each of the one or more first laser pulses has a pulse width of about 300 μs. ### Claim 4 (depends on 1) The method of claim 1, wherein irradiating the portion of skin with one or more first laser pulses comprises irradiating the portion of skin with one or more first laser pulses with minimal overlapping. ### Claim 5 (depends on 1) The method of claim 1, wherein irradiating the portion of skin with one or more first laser pulses comprises irradiating the portion of skin with one or more first laser pulses in a single pass over the portion of skin. ### Claim 6 (depends on 1) The method of claim 1, wherein irradiating the portion of skin with one or more second laser pulses comprises irradiating the portion of skin with one or more second laser pulses that are generated by the laser operating in a Q-switched mode. ### Claim 7 (depends on 6) The method of claim 6, wherein each of the one or more second laser pulses has a pulse width in a range of about 5 ns to about 7 ns. ### Claim 8 (depends on 1) The method of claim 1, wherein irradiating the portion of skin with one or more second laser pulses comprises: ablating one or more carbon particles from the carbon lotion that is within one or more enlarged pores in the portion of skin causing at least partial ablation of a stratum corenum of the portion of skin, and causing one or more photoacoustic or photoosmotic shockwaves to penetrate the portion of skin and stimulate one or more skin cells within the portion of skin. ### Claim 9 A method of treating a portion of skin, the method comprising: applying a carbon lotion to a portion of skin comprising one or more indicators of aging; irradiating the portion of skin with one or more first laser pulses, wherein each of the one or more first laser pulses has a first pulse width in a range of 100 μs to 1000 μs; and irradiating the portion of skin with one or more second laser pulses, wherein a laser producing the first and second laser pulses has an oscillation wavelength of 1064 nm, wherein each of the one or more second pulses has a second pulse width in a range of about 5 ns to about 50 ns. ### Claim 10 (depends on 1) The method of claim 1, further comprising: prior to irradiating the portion of the skin with the one or more first laser pulses and the one or more second laser pulses, removing excess carbon lotion from the portion of skin. ### Claim 11 (depends on 1) The method of claim 1, further comprising: prior to irradiating the portion of the skin with the one or more first laser pulses and the one or more second laser pulses, removing excess carbon lotion from the portion of skin. ### Claim 12 (depends on 9) The method of claim 9, wherein the laser comprises a pulsed Nd:YAG laser. ### Claim 13 (depends on 9) The method of claim 9, wherein each of the one or more first laser pulses has a pulse width of about 300 μs. ### Claim 14 (depends on 9) The method of claim 9, wherein irradiating the portion of skin with one or more first laser pulses comprises irradiating the portion of skin with one or more first laser pulses with minimal overlapping. ### Claim 15 (depends on 9) The method of claim 9, wherein irradiating the portion of skin with one or more first laser pulses comprises irradiating the portion of skin with one or more first laser pulses in a single pass over the portion of skin. ### Claim 16 (depends on 9) The method of claim 9, wherein irradiating the portion of skin with one or more second laser pulses comprises irradiating the portion of skin with one or more second laser pulses that are generated by the laser operating in a Q-switched mode. ### Claim 17 (depends on 16) The method of claim 16, wherein each of the one or more second laser pulses has a pulse width in a range of about 5 ns to about 7 ns. ### Claim 18 (depends on 9) The method of claim 9, wherein the portion of skin comprises one or more indicators of photoaging skin. ### Claim 19 (depends on 9) The method of claim 9, wherein the portion of skin comprises one or more indicators of chronological-aging skin.