ELECTROLYSIS IBEC LASER STATE BOARD
FINAL PAPER TESTED QUESTIONS WITH FULL
SOLUTION
◉ If the pulse width is greater than the thermal relaxation time it
results in?
Answer: A burn
◉ If the pulse width is less than or equal to the thermal relaxation
time it results in?
Answer: Perfect hair removal
◉ Larger structures have __________ thermal relaxation times (TRT)
Answer: Longer
◉ Smaller structures have _______ thermal relaxation times (TRT)
Answer: Shorter
◉ What kind of pulse widths protect the epidermis, penetrate
deeper and cool more slowly?
Answer: Long
,◉ Longer pulse widths are for what skin type?
Answer: 4-6
◉ What kind of pulse widths are more aggressive and heat up and
cool down quickly?
Answer: Short
◉ Shorter pulse widths are for what skin type?
Answer: 1-3
◉ What percentage of follicles are damaged with each laser
treatment?
Answer: 15%
◉ What is a long-term stable reduction of the growing hairs after a
treatment regime?
Answer: Laser Hair Removal (LHR)
◉ What does the FDA call laser hair removal?
Answer: Permanent hair reduction
,◉ What is the highest setting the skin can tolerate without damage
called?
Answer: Fluence Threshold
◉ What is the highest setting the patient can tolerate without the
treatment becoming impossible called?
Answer: Patient Threshold
◉ The amount of hair per one square centimeter is known as?
Answer: Hair density
◉ The higher the hair density, the _______ the fluence?
Answer: Lower
◉ What percentage of overlapping do you want when doing LHR?
Answer: 30%
◉ Darker/tanned skin requires what kind of fluence?
Answer: Lower
◉ What should you never use to clean a patient's skin prior to LHR?
Answer: Alcohol
, ◉ Pulse duration is measured in what unit?
Answer: milliseconds (ms)
◉ Spot size is measured in what unit?
Answer: millimeters (mm)
◉ Repetition rate is measured in what unit?
Answer: hertz (Hz)
◉ Who is the grandfather of laser and was the first person to use
water to cool the skin during laser?
Answer: Rox Anderson
◉ The formula for fluence is?
Answer: Joules = J/cm2
◉ What kind of lasers allow for selective heating of specific targets?
Answer: Selective photothermolysis
◉ For deeper laser penetration what should the practitioner do to
the laser?
FINAL PAPER TESTED QUESTIONS WITH FULL
SOLUTION
◉ If the pulse width is greater than the thermal relaxation time it
results in?
Answer: A burn
◉ If the pulse width is less than or equal to the thermal relaxation
time it results in?
Answer: Perfect hair removal
◉ Larger structures have __________ thermal relaxation times (TRT)
Answer: Longer
◉ Smaller structures have _______ thermal relaxation times (TRT)
Answer: Shorter
◉ What kind of pulse widths protect the epidermis, penetrate
deeper and cool more slowly?
Answer: Long
,◉ Longer pulse widths are for what skin type?
Answer: 4-6
◉ What kind of pulse widths are more aggressive and heat up and
cool down quickly?
Answer: Short
◉ Shorter pulse widths are for what skin type?
Answer: 1-3
◉ What percentage of follicles are damaged with each laser
treatment?
Answer: 15%
◉ What is a long-term stable reduction of the growing hairs after a
treatment regime?
Answer: Laser Hair Removal (LHR)
◉ What does the FDA call laser hair removal?
Answer: Permanent hair reduction
,◉ What is the highest setting the skin can tolerate without damage
called?
Answer: Fluence Threshold
◉ What is the highest setting the patient can tolerate without the
treatment becoming impossible called?
Answer: Patient Threshold
◉ The amount of hair per one square centimeter is known as?
Answer: Hair density
◉ The higher the hair density, the _______ the fluence?
Answer: Lower
◉ What percentage of overlapping do you want when doing LHR?
Answer: 30%
◉ Darker/tanned skin requires what kind of fluence?
Answer: Lower
◉ What should you never use to clean a patient's skin prior to LHR?
Answer: Alcohol
, ◉ Pulse duration is measured in what unit?
Answer: milliseconds (ms)
◉ Spot size is measured in what unit?
Answer: millimeters (mm)
◉ Repetition rate is measured in what unit?
Answer: hertz (Hz)
◉ Who is the grandfather of laser and was the first person to use
water to cool the skin during laser?
Answer: Rox Anderson
◉ The formula for fluence is?
Answer: Joules = J/cm2
◉ What kind of lasers allow for selective heating of specific targets?
Answer: Selective photothermolysis
◉ For deeper laser penetration what should the practitioner do to
the laser?
