Hair removal method

Details Hair removal method Hair removal method

1996-05-13

1998-05-19

Dawson, Glenn K.

Surgery

Instruments

Light application

606133, A61B 1736, A61B 1750

Patent

active

057529493

ABSTRACT:
A process for the long term or permanent prevention of growth of unwanted hair. The upper portions of hair ducts (i.e. portions near the skin surface) in a section of skin are infiltrated with a contaminant having a high absorption at at least one frequency band of light. The skin is then illuminated using a process having at least two distinct phases. In a "mechanical" phase the skin section is illuminated (e.g., by a laser) with at least one short pulse of light sufficient to cause tiny explosions in the contaminant forcing portions of the contaminant more deeply into the hair ducts. During a "thermal" phase the skin section is then illuminated so as to heat the contaminant substantially without further explosion or vaporization of the contaminant. The hot contaminant heats portions of the skin tissue immediately surrounding the contaminant to a temperature high enough and for a long enough period of time to devitalize the tissue. The process may also include a "cleanup" phase, during which the skin section is illuminated with a few short pulses of light to cause additional explosions in and vaporization of portions of the contaminant then remaining in the ducts and additional damage to the skin tissue immediately surrounding the contaminant.

REFERENCES:
patent: 3538919 (1970-11-01), Mayer
patent: 3693623 (1972-09-01), Harte et al.
patent: 3769963 (1973-11-01), Goldman et al.
patent: 3794028 (1974-02-01), Mueller et al.
patent: 3834391 (1974-09-01), Block
patent: 3900034 (1975-08-01), Katz et al.
patent: 4336809 (1982-06-01), Clark
patent: 4388924 (1983-06-01), Weissman et al.
patent: 4461294 (1984-07-01), Baron
patent: 4608978 (1986-09-01), Rohr
patent: 4617926 (1986-10-01), Sutton
patent: 4712543 (1987-12-01), Baron
patent: 4813412 (1989-03-01), Yamazaki
patent: 5059192 (1991-10-01), Zaias
patent: 5423803 (1995-06-01), Tankovich et al.
patent: 5425728 (1995-06-01), Tankovich
Porphyrins in Tumor Phototherapy--Andereoni 1984--pp. 143-155.
Investigation and Therapy in Dermatology A. Anders, et al.--Conf. Laser 77 Optics-Electronics (20-24 Jun. 1977).

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