Mark Johnson, MD, PhD
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Mark Johnson, MD, PhD
Cosmetic surgeon | Views: 43329

Friendname: DrMarkEJohnson
Business Name: Nouveau Jeunesse Rejuvenative Medicine
Website: findnewyouth.com
Location: 7131 W Deschutes Ave, Ste 101
Kennewick, WA 99336
United States
Telephone: 509-736-9989
Languages Spoken: English

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"i have skin type 3 with coarse black hair all over except on my back which is fine hair. for my coarse hair my laser technition has been using settings (35j, 23m/s)with NDYAG laser. are these settings effective? i'm worried the pulse width should be lowered for more effectiveness

If you are having poor luck at hair removal with those settings it may make sense to lower the pulse width down to about 10 to "cone down" the energy into a smaller area. Concurrently, I would also decrease the energy (joules) initially so that burning isnt an issue and increase the energy to find the optimal point for the hair removal to stay permanent.

I hope this has been helpful.
Mark E Johnson, MD, PhD "

So doctor would you suggest i ask her to lower the settings to 30j, 10ms? can i keep it as 35j and lower the pulse width only or both must be altered? i appreciate your answer very much :)


Cosmetic surgeon
Kennewick, WA
United States
View My Professional Profile
  June 21, 2011 12:36 PM

To answer your question, let me explain what the pulse width does. It functions to focus the energy of the beam of laser light. A narrow pulse width focusses the light to more of a pinpoint, kind of like a magnifying glass. The wider the pulse width, the more area the energy is spread out over.

You can keep the same energy if you want. My only concern would be that since it is more focused that it might burn you. I am always just a little extra cautious about such things, since most people dont like burns. So that was my thinking in suggesting that.

Hope this helps. Let me know how it goes for you.

Kind regards,
Mark E Johnson, MD, PhD



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