Triple‑Wavelength Laser Hair Removal: Parameters, Technique, and Safety

Patient Assessment

Confirm Fitzpatrick skin type by visual assessment before initiating treatment. 1, 2

Use a fluence of 35–50 J/cm² with a 10 ms pulse duration; typical spot size is 10 mm. 1, 2
Plan 3–4 initial treatment sessions, adding further sessions as needed for durable hair reduction. 1, 2

Use a fluence of 25–40 J/cm² with a 20 ms pulse duration; typical spot size is 10 mm. 1, 2
Plan 3–4 initial treatment sessions, adding further sessions as needed for durable hair reduction. 1, 2

Target delayed post‑treatment perifollicular erythema and/or edema as the clinical endpoint rather than relying solely on preset energy levels; this ensures adequate follicular destruction while minimizing overtreatment. 1, 2
Treat the entire affected region with double‑pulsed, stacked‑fashion delivery to maximize follicular targeting. 1, 2
Adjust settings based on operator experience with the specific device and selected spot size. 1, 2

Do not apply higher fluence settings (35–50 J/cm²) intended for lighter skin to patients with Fitzpatrick IV‑VI, as this markedly raises the risk of post‑inflammatory hyperpigmentation. 1, 2
Do not omit the longer pulse duration (20 ms) for darker skin types; maintaining this duration is critical for safety. 1, 2

During each session, assess immediate erythema and modify fluence accordingly. 1, 2
After treatment, monitor for delayed perifollicular erythema/edema at 24–48 hours to evaluate endpoint achievement and detect early adverse effects. 1, 2