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Hair Removal With Blended 755/1064 nm Laser Energy.
Edward V Ross1, Yacov Domankevitz2
1Scripps Clinic, San Diego, California.
Lasers in Surgery and Medicine
|January 28, 2021
Summary
A new laser system combining 755nm alexandrite and 1064nm Nd:YAG wavelengths offers effective hair reduction for diverse skin and hair types. This blended approach provides safer, less painful treatments, especially for challenging cases like darker skin with lighter hair.
Area of Science:
- Dermatology
- Laser Physics
- Aesthetic Medicine
Background:
- The 1064nm wavelength is optimal for dark skin, but may be ineffective for lighter hair.
- The 755nm alexandrite wavelength is effective for various hair colors but not ideal for darker skin.
- A simultaneous 755/1064nm wavelength laser system is hypothesized to improve safety, efficacy, and patient comfort for hair reduction across diverse skin and hair types.
Purpose of the Study:
- To evaluate the efficacy and safety of a novel simultaneous 755/1064nm wavelength laser system for hair reduction.
- To compare the effectiveness of blended wavelengths against individual alexandrite and Nd:YAG wavelengths.
- To determine optimal light doses for various skin types using the blended laser system.
Main Methods:
- A prospective randomized study involving 36 patients (skin types I-IV) undergoing hair reduction on the axilla and lower extremity.
- A prototype laser system emitted simultaneous 755/1064nm wavelengths with varying percentages, spot size of 12mm, and pulse duration of 3ms.
- Test spots with escalating doses were followed by two treatment sessions one month apart, with final hair counts assessed two months post-treatment.
Main Results:
- The blended 755/1064nm wavelength group achieved greater than 50% hair reduction in 60% of subjects on the lower extremity and 24% in the axilla.
- Optimal light doses varied by skin type, with lower fluences required for darker skin types (V) using the blended system.
- The 70/30 mixture of Nd:YAG and alexandrite wavelengths demonstrated the greatest hair reduction with minimal epidermal compromise and lower pain levels in challenging cases.
Conclusions:
- The simultaneous 755/1064nm wavelength mixture is effective for hair removal in lighter hair types on darker skin.
- This blended laser approach offers a safer and more comfortable hair reduction option for a wider range of patients.
- Further research supports the utility of this combined wavelength technology in aesthetic dermatology.
