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Clinical Aesthetics > Laser > Flashcards

Laser Flashcards

1
Q

What is the main requirement for receiving LASER?

A

The hair being treated must be darker then the surrounding skin.

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2
Q

Which hair responds best to LASER treatment?

A

Coarse and dark hair.

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3
Q

How was it discovered that LASER would remove hair?

A

People getting birthmarks treated with LASER noticed hair reduction.

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4
Q

Will all people treated have permanent hair removal?

A

No, some may only see hair reduction.

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5
Q

How’s does LASER work?

A

Using coloured lights, LASER passes through the skin targeting hemoglobin and red blood cells. LASER energy heats, and destroys (dormant) the cell.

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6
Q

Does the Nd:YAG, alexandrite, and diode laser, all work at the same efficiency?

A

Nd:YAG isn’t as efficient as the other two. The alexandrite and diode have about the same efficiency.

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7
Q

What kind of laser is the Nd:YAG, alexandrite, and diode?

A

Long pulsed.

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8
Q

What does LASER stand for?

A 
Light
Amplification by the
Stimulated
Emission of
Radiation
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9
Q

What is the objective of LASER?

A

To achieve critical temperatures in the hair follicle, while not heating up the surrounding skin, causing damage.

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10
Q

LASER devices are coherent, what does this mean?

A

Multiple wave sources are have a the same constant phase difference, the same frequency, and the same waveform.

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11
Q

LASER devices are monochromatic, what does this mean?

A

Extremely pure wavelength of a single coloured light.

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12
Q

LASER devices are collimated, what does this mean?

A

Beams of light are parallel to each other.

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13
Q

What was the first LASER based on?

A

Pink ruby crystal.

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14
Q

Who created the basic operating principles of LASER?

A

Charles Townes and Arthur Schalow.

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15
Q

When were the basic operating principals of LASER put forth?

A

1958

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16
Q

What is light made out of?

A

Photons.

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17
Q

What is light therapy?

A

The application of light rays to the skin for the treatment of disorders.

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18
Q

What is a wavelength?

A

The distance between two successive peaks.

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19
Q

What is the frequency of a long wave length?

A

Longer wavelengths have a low frequencies.

20
Q

What is the frequency of a short wavelength?

A

Shorter wavelengths have higher frequencies.

21
Q

What is the electromagnetic spectrum?

A

The electromagnetic spectrum is the range of frequencies of electromagnetic radiation, their respective wavelengths and photon energies.

22
Q

Natural sunlight is made up of what three types of electromagnetic energy?

A

Visible light, invisible ultraviolet light, and invisible infrared light.

23
Q

Visible light makes up what percentage of natural sunlight?

A

35%

24
Q

Invisible light makes up what percentage of natural sunlight?

A

65%

25
Q

Are ultraviolet lights and infrared lights visible light?

A

No, because their wavelengths are beyond visible spectrum of light.

26
Q

Where are the visible colours of red and violet on the electromagnetic spectrum?

A

Red has a longer wavelength, meaning a lower frequency. Violet has a shorter wavelength, meaning a higher frequency.

27
Q

Where does infrared light sit on the electromagnetic spectrum?

A

Infrared has a low frequency, and sits just under the visible colour of red.

28
Q

Where does ultraviolet light sit on the electromagnetic spectrum?

A

Ultraviolet light has a high frequency, and sits just about the visible colour of violet.

29
Q

What are therapeutic lamps?

A

Lamps used in the salon to produce artificial light rays.

30
Q

What are therapeutic lamps capable of creating?

A

Rays produced by the sun, thermal (heat), mechanical effects, and chemical effects.

31
Q

What percentage of natural sunlight is made up of ultraviolet rays?

A

5%

32
Q

What are the other names for ultraviolet rays?

A

Cold rays, and actinic rays.

33
Q

What does the sun do for the skin?

A

Provides vitamin D.

34
Q

What can ultraviolet rays be used to treat?

A

Rickets (soft deformed bones), psoriasis, and acne.

35
Q

What do ultraviolet rays help in the production of?

A

Ultraviolet light helps with the production of melanin.

36
Q

What may a dark tan indicate?

A

May be a sign of the skin under attack from ultraviolet rays.

37
Q

At what distance should ultraviolet rays be applied to the skin using a lamp?

A

30-60 inches.

38
Q

What can overexposure to ultraviolet rays lead to?

A

Painful burns and/or blistering, and an increased risk of skin cancer.

39
Q

What percentage of natural sunlight is made of infrared?

A

60%

40
Q

What are five factors you should use when evaluating a LASER?

A 
User interface (user friendly), 
ergonomics(easy to use during treatment), 
training (ongoing support), 
service (repairs and help line), and 
price point.
41
Q

Where is the negative association to the word radiation come from?

A

Radioactive materials and ionizing radiation.

42
Q

Is the light produced from LASER either radioactive or ionizing?

A

No, LASER light is composed of photon particles.

43
Q

What is thermal relaxation time?

A

The time taken for the target to dissipate a percentage of the initial thermal energy.

44
Q

What is thermal destruction time?

A

The time required to thermally destruct the hair shaft, bulge, and surround the stem cells responsible for new hair growth.

45
Q

What three things are required for optical penetration into the skin?

A

Absorption, scattering, and spot size.

Clinical Aesthetics (12 decks)

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