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 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.
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 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.
