Just some questions really.
I’m thinking of using either the Lightsheer diode or the nd: YAG Coolglide to reduce my hair on my forearms and get rid of as much hair on my upper arms, shoulders and back as possible. I understand this is quite a large area and thus ask, firstly, whether to get the back and shoulders area treated first (as that’s what I want removing/reducing the most) and then have treatments on my arms later. Or to try and do it in one session and run with it for however long it takes (I’m looking at 18-24 months).
My second question has to do with the correlation between the amount of fluence used and the effectivness of hair reduction/removal. I was reading a study-- http://www.aesthetic.lumenis.com/pdf/safety_efficacy.pdf–based on the Lightsheer that suggested that the melanin in a hair follicle absorbs 3-4 times more engery at 800 nm (the wavelength used in the Lightsheer) than at 1064 nm (the wavelength used in the Coolglide and other nd: YAG lasers). Thus as a consequence lower fluences can be used, reducing discomfort, without affecting the result (that’s my deduction!).
Does this claim carry substance? I was reading RJC2001’s posts with great interest about using fluence numbers and - generally - the higher the better. But if the Lightsheer is more effective with regard to absorbtion than perhaps a more “accommodating” fluence level can be used (say 25-30 as opposed to 40-45).
Am I so far so good in this suggestion?
In addition, the clinical paper suggested that a pulse width of 100ms would improve the results provided in the paper for people with skin type V.
I understand that everyone is different but am I fair to assume that the usage of a fluence level of how about 30 with a pulse width of 100ms using the Lightsheer would be a good combination.
Thanks for sticking with it! Just a few more Qs…
Ok, so if the Lightsheer is more effective at absorbing melanin then a lower fluence can be used.
This website – http://youre-looking-great.com/lightsheer_paper.htm – copies a clinical paper and ignoring its commercial attributes suggests that the Lightsheer should be used in the following way:
skin type IV - Fluence - 20-30 J/cm2, pulse width: 30ms
skin type V - Fluence - 15-25 J/cm2, pulse width: 30ms
Is this accurate? And if it is true about the Lightsheer’s effectivness, then are these values that would do significant damage (after several treatments obviously)?
Now with regards to the Coolglide…if it’s safter for darker skin (which I’ve learnt it is–in comparison to the Lightsheer)–then can higher fluences be used? 30-45 perhaps? It would be less comfortable than the Lightsheer but it would certainly be more effectie, no? And as the nd: YAG laser is safer on darker skin, a higher fluence can be used and it would be more effective per treatment than the Lightsheer?
Is this deduction correct?
thanks in advance for your help!
[ December 03, 2003, 01:58 PM: Message edited by: Zambo ]