Parameters, Laser & IPL Applications
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88 Terms
Wavelength
The distance measured from peak to peak measured in nanometers, determines the chromophore.
Pulse duration
The amount of time measured in milliseconds it takes between a pulse of laser leaving the HP to hit the target.
Spot size
The surface area of the pulse of laser applied to the skin
Fluence
The measurement of heat and energy in a pulse of laser
T/F: The longer the wavelength the deeper it will penetrate with the exception of water chromophore lasers
True
___ spot sizes will penetrate deeper into the skin
Larger
___spot sizes will penetrate more shallow into the skin
Smaller
Circular spot sizes typically have a __% overlap
20%
Square/rectangle spot sizes typically have a __% overlap
50%
Thermal Relaxation Time (TRT)
The amount of time it takes a target to disperse at least 50% of the heat to the surrounding tissue to cool down
Thermal Damage Time (TDT)
The amount of time required to thermally damage the entire target without damaging surrounding tissue
When doing LHR the ms is based off of what
Hair thickness
Clinical end point is based on what two things?
Pain level; visual cues
What setting is associated with the most adverse reactions?
Fluence
What is the equation for fluence?
Joules/ cm2
What is a joule?
1 unit of laser energy
___ spot sizes created more scatter
Smaller
T/F: Modern lasers typically have more than one wavelength inside a single unit
True
When light is selectively absorbed by its target, transferred into heat then damages the target
Selective photothermolysis
T/F: If the fluence is too high, it can damage the surrounding tissue
True
__ is the setting used to intensify the fluence without adding any heat
Pulse duration
T/F: The higher the number of pulse duration, the more aggressive and faster it will be
False
Alexandrite wavelength
755nm
Diode wavelength
800-855nm
ND: YAG wavelength
1064nm
ER: YAG/Erbium wavelength
2940nm
CO2 wavelength
10,600nm
Pulsed Dye Laser (PDL) wavelength
500-600nm
IPL wavelength
400-1500nm
KTP wavelength
532nm
What is the chromophore for Alexandrite?
Melanin
What is the chromophore for ND:YAG?
Blood
What is the chromophore for Diode?
Melanin
What is the chromophore for ER:YAG/Erbium?
Water
What is the chromophore for CO2?
Water
What is the chromophore for a Pulsed Dye Laser
Blood
What is the chromophore for IPL?
Water, Melanin, Hemoglobin, Oxyhemoglobin
What is the chromophore for a KTP laser?
Blood, Melanin
What wavelength is used to treat LHR, vascular lesions, skin tightening, acne, toe fungus & tattoo?
ND:YAG
What wavelength is used to treat LHR, pigmented lesions, and tattoo removal?
Alexandrite
What wavelength is just used to treat LHR?
Diode
What wavelength is used for skin rejuvenation and ablative skin resurfacing?
ER:YAG & CO2
What wavelength is used in a dermatology setting that treats a wide renege of vascular conditions like port wine stains?
Pulsed Dye
What wavelength can only be used on Fitzpatrick 1-3 and targets melanin?
755nm
What is another word for CM2
Spot size