Laser Hair Removal Exam Questions with 100% Correct Answers | Verified | Updated 2024
What are the layers of the skin?
epidermis, dermis, hypodermis
What are the 2 classifications of hair?
Vellus and terminal hair
Pulse duration and fluence for fitz 1,2,3
-Use higher fluences
-Shorter pu...
What are the layers of the skin?
epidermis, dermis, hypodermis
What are the 2 classifications of hair?
Vellus and terminal hair
Pulse duration and fluence for fitz 1,2,3
-Use higher fluences
-Shorter pulse duration
Pulse duration and fluence for fitz 4,5
-Use a lower fluence
-Use a longer pulse duration
Normal systemic changes
-Puberty
-Menopause
-Pregnancy
What are the factors that activate hair growth?
-Increased blood supply to the area (topical stimulation)- accelerates
-Hormone stimulation initiates and accelerates
What is a chromophore for laser hair removal?
Melanin
Examples of medical laser wavelengths, the different platforms
-Ruby: 694 nm (red light, don't use anymore)
-Alexandrite: 755 nm (green light, skin types 1,2,3)
-Diode: 800-810 nm (invisible light, skin types 1,2,3,4)
-Nd: YAG 1064 nm (neodymium: yttrium-aluminum-garnet) (invisible light, all skin
types, not the best but safest for skin types 4 and 5)
What are the phases of hair growth
anagen, catagen, telogen
Anagen
-Active hair growth is occurring
-in early anagen, the follicle is growing and starting to deepen
-Hair is beginning to grow but has not yet reached the surface of the skin
-The mid-late anagen follicle has reached its maximum depth. The hair is fully visible
terminal hair on the surface of the skin.
-The hair shaft bulb is dark or black pigmented and very moist
-Dermal papilla directs and supports hair growth, enclosed by hair matrix
Catagen
-Brief transitional stage
-Last only a few days to a few weeks
-Hair folicle seperates from the papilla
-The hair shaft bulb is lighter or brown pigmented and lighter
-Hair folicle shorts 1/3 of its former length
-In late catagen, the thin cord of epidermal cells attaching the dermal papilla to the
shrunken hair reacts upwards, followed by underlyin g hair papilla, which also
movesz upwards.
Telogen
, -Resting or dormant period
-The papilla has detached from the follicle
- a "club" hair is terminal hair that has separated from the papilla that has risen to the
top of the follicle. eventually, it falls out
-The hair bulb has shrunken, is white, and consists of keratinized hair matrix cells
-Sometimes the follicle doesn't go through this phase.
Why gray hair does not absorb laser energy?
Grey hair lacks pigment, or they do not have enough pigment granule, so therefore
they cannot absorb enough energy from the laser, even with a higher fluence, the
hair and the follicle is not destroyed. An alternate method for permanent hair removal
must be advised such as electrolysis or ultrasound hair removal.
How is the skin nourished?
Through blood and lymph
3 types of pigment seen in skin
Melanin (brown, red, yellow and black pigment)
Hemoglobin (red or bluish undertones of the skin)
Carotene (gives yellow undertone)
Hormone definition and their function
-Hormones are chemical substances that pass from their glands directly into the
bloodstream.
-Act somewhat as catalysts, which can speed up or slow down the metabolic
processes of the body. They travel throughout the body usually targeting certain
organs like a key fitting into a certain lock so the role of specific hormones go to
specific organs to carry out specialized functions.
Why is shaving between treatments ideal for laser hair removal?
Because hair grows in different stages, the best way to eliminate hair is to get it
treated when it is actively growing. Shave until the hair has finally stopped growing
back.
After treatment, completely shave all the hairs away. Anything left will cause irritation
or surface burns
Hirsutism
-Excessive and increased hair growth in women's in locations where the occurrence
of terminal hair normally is minimal or absent.
-It is a male pattern of body hair (androgenic hair)
Explain the difference between IPL and Laser, at least 3 points for each
IPL
-Non-coherent
-Unfocused
-Intense pulse light devices are non-laser high-intensity light sources that make use
of high-output flash lamps to produce a broad wavelength output of non-coherent
light usually in the 1200 nm range.
-Light pulses are produced by bursts of electrical current passing through a xenon
gas-filled chamber.
The advantage of the IPL platform is they have a bigger spot size. So the tech can
finish the treatment a lot faster
lASER
-Monochromatic
-Coherent
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