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Method and apparatus for laser-assisted hair transplantation

  • US 5,908,417 A
  • Filed: 03/19/1997
  • Issued: 06/01/1999
  • Est. Priority Date: 03/29/1996
  • Status: Expired due to Fees
First Claim
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1. A laser treatment method for the preparation of plural recipient sites for implanting hair-bearing tissue on skin of a human, said method comprising the successive steps ofirradiating a selected treatment site of alopecic scalp tissue with erbium pulsed coherent light having a wavelength substantially in the range of 2.5-3.5 μ

  • m, said light having an energy fluence substantially in a range of 1-200 J/cm2, a pulsewidth substantially in a range of 100-2000 microseconds, at a non-orthogonal angle incident to said treatment site and a spot area incident on said treatment site substantially in a range of 10-3 to 10-1 cm2,controlling exposure duration at said treatment site to produce a controlled ablation depth of 1-5 mm at said treatment site,directing said light, with a distance gauge for non-orthogonal administration of energy, to produce a plurality of recipient sites in said alopecic scalp tissue, whereby slit-shaped recipient sites are produced which are suitable for receiving transplanted grafts, wherein each of said slit-shaped sites is angled in a direction corresponding to a local prevalent direction of hair growth, andfurther directing said light to produce said recipient sites in an irregular grid pattern wherein said slits have adjacent positions which are linearly offset.

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