Hair Removal Laser

DD

Dr. Arasteh

They named these first light sources LASER, an acronym for Light Amplification by Stimulated Emission of Radiation.

Laser Theory

Dr. Arasteh

selective photothermolysiscause localized damage by selectively heating

dark target matter, melanin,Melanin is considered the primary

chromophoreonly black or brown hair can be removedNow lasers are able to target hair with little

or no melanina combination of the appropriate laser

wavelength, pulse duration, and fluenceDr. Arasteh

Hair Removal Lasers Theory

Dr. Arasteh

Wavelengths between approximately 700 and 1000 nanometers (nm) are

Selectively absorbed by melanin

Dr. Arasteh

Pulse duration (or pulse width) must be equal to or shorter than the thermal relaxation time

Pulse width must be matched with the appropriate amount of fluence

Longer pulse widths may be safer for darker skin

shorter pulse widths are more effective in disabling hair follicles

Puls Caracteristics

Dr. Arasteh

the width of the ideal beam is about four times as wide as the target is deep

Larger spot sizes help laser light penetrate deeper

Spot Size

Dr. Arasteh

Energy level :J/cm²high enough settings to heat up the follicles

Fluence

Dr. Arasteh

Duration of hair growth cycles

Dr. Arasteh

Contact coolingCryogen sprayAir cooling

Effects :

Decreases the painRemoves oxyhemoglobin, a chromophore that

competes with melanin

Cooling

Dr. Arasteh

HAIR LOSS AND REGROWTH

Dr. Arasteh

Laser can only affect the currently active growing hair follicles (early anagen)

Typically the shedding of the treated hairs takes about two to three weeks

Temporary hair loss and permanent hair reduction

Regrowing hairs are lighter and thinner

Dr. Arasteh

Itching,Pink skin, Redness, Swelling around the treatment area or

swelling of the follicles

Normal side effects

Dr. Arasteh

strong numbing creams over large skin areas has seriously harmed, and even killed

Icing relieve the side effects faster

Perifollicular swelling and redness aredesired clinical endpoints

Dr. Arasteh

Hypo- or hyper-pigmentation

Burning

Flare of acne

Purpura

Infection

Unwanted side effects

Dr. Arasteh

Shave before treatment

There is a high risk for eye damage

Regularly clean the handpiece

Fluence Selection

Hair loss is fluence-dependent

Treatment Methods

Dr. Arasteh

Fitzpatrick classification of skins type

Dr. Arasteh

Alexindrite : 755 nm (Near-Infrared) (most effective on pale skin and not safe on darker skin at effective settings)

Diode : 810 nm (Near-Infrared) (for pale to medium type skin)

Nd:YAG laser: 1064 nm (Near-Infrared) (made for treating darker skin types, though effective on all skin types)

IPL : 810 nm (Not a laser but used for hair removal) (for pale to medium type skin)

Current Hair Removal Lasers

Dr. Arasteh

LEDA EPI

Dr. Arasteh

 

Laser type DiodeWavelength 808 / 980 nmSpot size 50 x 12 mm / 10 x 12 mmPulse width 6-60 msecPulse width Low Fluence Mode 312-3240 msecPower density up to 60 J/cm² Skin cooling optional cold air or contact coolingDimensions Basis (L x W x H)45 x 41 x 24 cm Weight Basis 23 kgPower requirements 115-230 V, 10 ACompliance EC Medical Device Directive (MDD) 93/42/EEC

(C E mark)FDA/US 510 k*

Technical Specifications LEDA EPITECHNICAL SPECIFICATIONS LEDA EPI

Dr. Arasteh

FHR® Fractional Hair Removal Technology for sensitive skin divides the large spot size into 2-4 smaller spots

Low Fluence Mode, LEDA EPI applies a series of low energy pulses to heat the follicles gradually until damage

Fast removal of all hairs

Big spot size of 50 x 12 mm

The most effective air cooling

Advantages