Material and methods
The Plasmalite ® 600+ was used to treat in total 58 patients, women and men, of various skin types ranging in pigmentation from pale Scandinavian skin to dark Indian/Pakistan skin.

Skin areas treated were: Face, Forehead, Cheek, Upper lip, Throat, Back, Shoulder, Under arm, Bikini line, Lower lateral abdomen, Thighs, Lower leg, Armpit, Dorsal foot.

Settings applied were: Wavelength bandwidth 600 - 900 nm, Pulsewidth and Energy Density from 30J/cm2 at 30 ms to 40J/cm2 at 40 ms. Settings were controlled with an Ophir® energy meter L30A-SH and a NovaT readout unit.

Prior to the treatment the area was shaved, leaving a 0.5mm stub and an ice cool gel was applied with a thickness of 2.5 to 3 mm. The light emitting waveguide was then lowered about 0.5 to 1 mm into said gel before a light pulse was fired.

The fairer the skin was the higher the pulse duration and the energy density was set (40J/cm2 at 40 ms). For the more darkly pigmented subjects the 30 J/cm2 at 30 ms setting was used.

The number of treatments versus patients was distributed as follows:

Results
In the 2 and only cases of fair skin and very blond hair, there was, as expected, no result after 3 treatments and no further treatment attempts where made. 1 very dark patient was treatment resistant after 4 treatments, presumably due to heavy skin pigmentation. 1 patient with medium blond to dark blond hair showed no effect after 5 treatments for reasons yet unclear. 8 patients showed 10-20% re-growth after the control period, 14 patients showed less than 10% re-growth after the control period and 32 patients showed no re-growth after the control period.

It was concluded that the hair pigmentation was the utmost important patient parameter for a good response to the treatment.