Photobiomodulation Therapy, Phototype
Conditions
Keywords
photobiomodulation, low-level laser therapy, skin optics, melanin, light reflection
Brief summary
Photobiomodulation therapy (PBMT) is based on exposing biological tissues to low-intensity light, with effects depending on the light-tissue interaction. When irradiated without skin contact, part of the incident light is reflected and lost. In this context, the amount of reflected light in PBMT applied without skin contact, as well as the influence of skin phototype, has not yet been established. Objective: To quantify the reflection of light from PBMT on the skin of men and women aged 18 to 30 years, considering skin phototypes. Methodology: Participants will be divided into three groups based on skin phototype (Group 1: phototypes I and II; Group 2: phototypes III and IV; Group 3: phototypes V and VI) and sex. They will be subjected to whole-body PBMT with red light (660 nm; 31.85±3.85 mW; 45.50±5.07 mW/cm²) and infrared light (850 nm; 25.29±2.99 mW; 36.13±4.27 mW/cm²) at 20 cm from the light-emitting source, with measurement of light reflection in the regions of the brachial biceps, abdomen, lumbar, anterior and posterior thigh, and calf using a power and energy analyzer (powermeter PM100D and sensor S130C, 0.7 cm²). Data will be analyzed for normality and groups were compared with a significance level of 5%
Interventions
Whole-body Photobiomodulation Therapy applied for approximately 10 minutes, being 5 minutes with the red wavelength and 5 minutes with the infrared wavelength.
Sponsors
Universidade Federal de Sao Carlos
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
HEALTH_SERVICES_RESEARCH
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
* male and female * age between 18 and 30 years * body mass index (BMI) between 18.5 and 29.9 kg/m2.
Exclusion criteria
* tattoo in the light reflection assessment areas * history of skin cancer * skin lesions such as open wounds in the mid-thigh, abdomen, biceps brachii, back and calf * patients with cognitive difficulty reporting thermal sensation
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Light Reflection | Acute measurement. The measurement will be performed just during the light therapy irradiation, on the day of the procedure. | Light reflection will be measured in mW with a PowerMeter Device in the angles of 30º, 60º and 90º considering the participant in front of the whole-body photobiomodulation therapy device. |
Countries
Brazil
Outcome results
None listed