Page 13 - Chapter 3 - Fundamentals of Laser/IPL Hair Removal

Chapter 3 – Fundamentals of Laser/IPL Hair Removal 1st Edition
Pulsewidth
How do fluence and pulsewidth relate to each other?
The relation between fluence, temperature and cell damage
Change of the fluence with depth in the skin
Spot size
Where do the photons go in the skin?
Selective Photothermolysis and hair removal – a quick review Thermal relaxation time – how important is it?
Hair Colour vs Skin Colour – How are they related?
Measurement of epidermal melanin content Epidermal peak temperatures for three fluences
Should we use longer pulses to reduce the pain in LHR?
Plume in the Air
Section 3.3 – How to Choose the Right Settings on Your Laser/IPL
The Clinical Endpoints
Clinical Endpoints
Threshold Denaturation Fluences – Four Devices
IPLs – Threshold fluences
Diode Laser – Threshold fluences
Long-pulsed Alexandrite Laser – Threshold fluences Long-Pulsed Nd:YAG Laser – Threshold fluences
Increasing the fluence – what happens?
IPL ‘Over-heating’ – the need for proper surface cooling What is the risk of burning the skin with a laser or IPL? What are the settings we must choose and why?
Test Patches
Pain control using RF energy
Section 3.4 – Hair Growth Cycles & Timings
Introduction – The Hair Follicle
Hair Shaft and Follicle Sizes Hair colour / thickness
The Hair Growth Cycle
Anagen Phase
Catagen Phase
Telogen Phase
Exogen Phase
Anagen – catagen – telogen timings
Heat transfer in the Hair Follicle – A Computer Model
Section 3.5 – Recommended Protocols
Protocols
‘Stamping’ vs ‘SHR’/gliding/’in-motion’ Techniques Increased fluence with cooling
Treating over tattoos or damaged skin
SHR – How can it work properly?
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________________________________________________________________________ 13 Chapter 3 Laser/IPL Hair Removal
© The Laser-IPL Guys, 2022