Chapter Laser week

What does laser stand for?

Light amplification by stimulated emission of radiation

What is the wavelength for ruby?

694.3 nm

What is the wavelength for alexandrite?

755 nm

What is the wavelength for diode?

800 or 810 nm

What is the wavelength for ND; Yag?

1064 nm

What determines the depth of penetration?

The melanin (the competing chromophores in the skin)

What are the 4 basic parameters of laser?

Fluence, pulse width/ pulse duration, spot size, wavelength

How is a wavelength determined?

by it’s adjacent point. peak to peak/ trough to trough

Wavelength is measured in what?

nanometers

Thermal relaxation time is the time necessary for target tissue to cool down by what percent?

50 percent

What are the 4 types of epidermal cooling?

pre- cooling, post-cooling, parallel - cooling, IPL

What is selective photo thermolysis?

Targeting of a specific chromophore using a specific wavelength to destroy target without damaging tissue.

Eye protection is needed while using which classification of lasers?

3B and 4

What is the optimal optical density rating number?

4.5-7

Where should you fire extinguisher be located?

inside treatment room or close by

How long should a client avoid the sun for a laser cosmetic and aesthetic treatment?

14 days (2 weeks)

Tetracycline is a topical or oral?

Oral

Erythromycin topical or oral?

Topical

Which ray penetrates deeper into subcutis layer?

UVA

What is nm for UVA?

320- 400 nm

What is the nm for UVB rays?

290- 320 nm

What skin types always require a spot test?

Fitzpatrick IV (4) through VI (6)

How long do you postpone laser for a client how was previsouly on accutane?

6 months to a year

What are the clinical endpoints for hair removal?

peri-follicular, edema and erythema

What are the clinical endpoints for vascular lesions?

Darkening or blanching

What are the clinical endpoints for acne?

less oil, puss, inflammation, acne

What are the clinical endpoints for hyperpigmentation?

Darker lesion

What can be applied on the skin immediately after a laser hair removal treatment?

post cooling- cold ice pack- aloe vera

Where on the spectrum are ionizing rays located

the violet side or shorter end of the spectrum or gamma, X-ray, infared

What topical cream should a client apply during the entire laser commitment?

sunscreen

What does every laser target?

chromophores

Laser plumes can cause what kind of problems?

respiratory issues, eye irritation, throat irritation

What are the 4 ways a laser can interact with the skin?

STAR scatter, transmission, absorption, reflection

Which of the above interactions is necessary to cause change in the tissue?

Absorption

Who regulates laser devices?

FDA

Hydroquinone 4% cream is used to treat what?

post inflammatory hyperpigmentation

Fluence is measured in what?

Jules/ cm2

What is the first line of protection for exposure to laser generated airborne contaminates (hair plumes)?

proper ventilation

People of Indian descent are usually classified of type what?

4 & 5