laser course 1

coherent

laser waves are in phase with one another

collimated

light waves travel parallel to one another with low divergence

Monochromatic

light waves are all the same wavelength

cutaneous

means "of the skin"

chromophore

what the laser energy is attracted to, the target

what is the acronym for LASER?

light amplification by stimulated emission of electromagnetic radiation

spatial coherence

allows a laser to be focused to a tight spot

selective photothermolysis

the matching of a specific wavelength of light and pulse duration to obtain optimal damage on the targeted tissue

what is the acronym for IPL?

intensed pulsed light

IPL definition?

the use of intense pulses of non-coherent light distributed over a range of wavelengths from 400nm-1200nm

what is IPL used for

removal of hair and skin color issues

follicle

a small tubular group of cells in the human skin that creates hair

Electrolysis

A process by which an electrical current permanently removes human hair

purpura

bruising of the epidermis

Erythema

swelling and redness of the skin

the papilla and bulge are critical structures responsible for what 2 things?

hair germ cells and hair growth

Galvanic method

Method of hair removal that destroys the hair by using multiple needles to decompose the papilla

Thermolysis

Process that destroys the hair by coagulating the papilla through heat

Hypo pigmentation

lightening of skin

todays lasers effectively remove _____ hairs

black, dark brown, medium brown

it is more difficult to remove ____ hairs

blonde, gray, red

spider veins

small red or purple vein very near the epidermis

varicose veins

large, buldging greenish or blue vein

Telegantasia

small grouping of veins near the skin surfae

cherry hemangioma

Small bulb of veins near the skin surface

sclerotherapy

• needle inserted into vein

• small amount of solution is injected

• veins collapse, absorbed by body

• small amount of solution is injected

• veins collapse, absorbed by body

pigment

solid titanium dioxide coloring used in permanent makeup

ink

liquid coloring used in tattoos

Ablative

a procedure that causes disruption to the epidermis

non-ablative

a peocedure that does not disrupt the epidermis

5 types of tattoos

traumatic, amateur, professional, medical, cosmetic

cyrosurgery

use of cold temperatures to destroy tissue

excision

process of cutting out, surgical removal

dermabrasion

removal of tattoos on the skin through the use of sandpaper, wire brushes, or other abrasive materials on the epidermal layer

laserbeam is absorbed by the _____ color of ink

opposite

a red laser beam will be absorbed by opposite color, but will ________ red ink

Emulsion

any mixture of two or more liquids in which one liquid is dispersed in the other

rhytide

a deep fold, ridge, or crease of the skin

hydrophobic

molecule repels from water

Apoptosis

process of programmed cell death

Necrosis

death of tissue

keratosis

abnormal growth of fibrous structural proteins on the skin

straie

tears in the dermis

melanin

A pigment that gives the skin its color

Collagen

structural protein found in the skin and connective tissue

tissue targets are:

• epidermis

• dermis

• subcutaneous fat

Polarity

number of electrodes in the hand piece

Uni-polar

one + electrode

mono-polar

one + electrode

one - electrode

bi-polar

both + and - electrode