US20090234372A1 - Epilation Method - Google Patents

Epilation Method Download PDF

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Publication number
US20090234372A1
US20090234372A1 US12/083,530 US8353006A US2009234372A1 US 20090234372 A1 US20090234372 A1 US 20090234372A1 US 8353006 A US8353006 A US 8353006A US 2009234372 A1 US2009234372 A1 US 2009234372A1
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US
United States
Prior art keywords
hairs
range
light
duration
skin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/083,530
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English (en)
Inventor
Georges Safraoui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eurofeedback SA
Original Assignee
Eurofeedback SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eurofeedback SA filed Critical Eurofeedback SA
Assigned to EUROFEEDBACK reassignment EUROFEEDBACK ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAFRAOUI, GEORGES
Publication of US20090234372A1 publication Critical patent/US20090234372A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/203—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser applying laser energy to the outside of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00452—Skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00452—Skin
    • A61B2018/00476—Hair follicles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B2018/1807—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using light other than laser radiation

Definitions

  • the present invention relates to a method of epilation by emitting light flashes. Such a method can be used cosmetically to prevent hairs that are undesirable esthetically speaking from growing back.
  • Application FR 2 838 042 discloses a device for treatment by emitting light flashes that is adapted to permanent epilation of hairs of dark color.
  • the light energy transmitted to the hairs by the light flashes is transformed into heat.
  • the temperature rise is sufficient to prevent hairs from growing back providing the hairs are dark in color.
  • U.S. Pat. No. 6,358,242 discloses a method of permanent epilation in which a photosensitive composition is applied to the skin after hairs have been removed, which composition penetrates into the follicles, and then the skin is irradiated using a laser diode in order to destroy the follicles.
  • the present invention provides a method of epilating hairs, in particular of light color, e.g. light brown, red, blond, white, or non-pigmented, the method comprising the steps consisting in:
  • Such a flash can raise the temperature of the mass of blood sufficiently to coagulate proteins of the follicular papillae from which hair regrowth originates, the mass of blood being in direct contact with the follicular papillae of the removed hairs.
  • Light-colored hairs comprise hairs of lightness L in the CIE L*a*b* colorimetric coordinate system is greater than 20, better greater than 25.
  • At least one treated hair may have a diameter as measured outside (away from) lying in the range 25 micrometers ( ⁇ m) to 50 ⁇ m. At least one treated hair may present an implantation depth lying in the range 1 millimeter (mm) to 5 mm.
  • the method of the invention makes it possible to avoid hairs of light color growing back.
  • the method may be implemented in a plurality of sessions, prior to permanent epilation being achieved.
  • Steps i) and ii) may be repeated at least once after a time interval of at least 3 weeks.
  • the invention also provides a method of epilation, in particular for strongly pigmented skin, the method including the step consisting in:
  • a refrigerated gel may be applied to the skin prior to the exposure to the light flash.
  • the hairs may be of light color.
  • FIG. 1 is a block diagram summarizing an implementation of the method of the invention
  • FIGS. 2 and 3 are diagrammatic longitudinal section views of a hair implanted in skin, and then removed;
  • FIG. 4 is a block diagram summarizing a variant of the method.
  • FIG. 1 shows the steps of a method in accordance with the invention suitable for epilating hairs of light color.
  • the method begins with mechanically removing hairs from the region to be treated in a first step 10 , and then after a waiting stage 20 , in exposure to at least one light flash in a step 30 .
  • the mechanical removal of the hairs may consist in taking hold of the hairs, and then exerting traction thereon, manually or by moving an appliance, as shown in FIGS. 2 and 3 .
  • the hairs may be removed mechanically by means of a pair of tweezers, wax, or an electric epilator using rotary disks, for example.
  • An electric epilator is sold under the trademark Epilady®.
  • the hairs can be removed one at a time or several at once.
  • the fibrous sac 3 that contained the bulb of the hair that has been removed fills with blood S during step 20 , as shown in FIG. 3 .
  • the blood mass that forms is in intimate contact with the follicular papilla 4 of the hair that has been removed and with the epithelial sheath 5 .
  • the temperature of this blood mass S can be raised using the light energy of the light flash in step 30 to a temperature that is high enough, e.g. greater than 70° C., better greater than 80° C., to coagulate the proteins of the follicular papilla from which hair regrowth originates.
  • Waiting step 20 may have a duration that lies in the range 1 minute (min) to 10 min, for example, in particular in the range 2 min to 8 min, better in the range 3 min to 6 min.
  • Step 30 of exposure to at least one light flash can be performed by means of a flash lamp.
  • the follicular papillae of the hairs that have been removed are subjected to a rise in temperature following the flash(es).
  • Emitting a plurality of flashes at lower power can be preferable to emitting a single flash at higher power with certain phototypes in order to avoid raising the temperature of the skin.
  • the light flash(es) may be of a duration lying in the range 5 milliseconds (ms) to 100 ms, or in the range 10 ms to 90 ms, better in the range 20 ms to 80 ms.
  • its duration lies for example in the range 5 ms to 100 ms with energy density lying in the range 10 joules per square centimeter (J/cm 2 ) to 40 J/cm 2 , better in the range 5 J/cm 2 to 30 J/cm 2 .
  • each flash is of a duration lying in the range 5 ms to 20 ms, with energy density in the range 2 J/cm 2 to 20 J/cm 2 ; the number of flashes lies for example in the range 2 to 10; the interval between flashes lies for example in the range 1 ms to 20 ms.
  • the pulse train may thus last for 5 ms to 300 ms.
  • the emitted light spectrum may be adapted to the absorption spectrum of blood, and in particular of hemoglobin.
  • the light spectrum received by the skin may present a peak in the range 450 nanometers (nm) to 650 nm, for example.
  • At least one filter may be used to filter the light emitted by the flash lamp in order to obtain the desired spectrum.
  • Ultraviolet light having a wavelength shorter than 400 nm is preferably filtered out.
  • Step 30 may be performed by means of a hand tool comprising a light guide advantageously made of a material that conducts heat, e.g. sapphire.
  • a layer of gel is applied to the skin in a step 40 preceding the emission of the light flash(es).
  • the gel may present a high refractive index, e.g. lying in the range 1.2 to 1.6.
  • the gel may be refrigerated before being applied to the skin, in particular with strong pigmentation, i.e. when the phototype of the skin is IV, V, or VI in the Fitzpatrick classification.
  • the gel may be applied manually during waiting step 20 .
  • the initial temperature of the gel may be less than or equal to 10° C., e.g. lying in the range 2° C. to 5° C.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Electromagnetism (AREA)
  • Medical Informatics (AREA)
  • Otolaryngology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Radiation-Therapy Devices (AREA)
  • Cosmetics (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
US12/083,530 2005-10-17 2006-10-17 Epilation Method Abandoned US20090234372A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0553147A FR2892012B1 (fr) 2005-10-17 2005-10-17 Procede d'epilation
FR0553147 2005-10-17
PCT/FR2006/051043 WO2007045793A2 (fr) 2005-10-17 2006-10-17 Procede d'epilation

Publications (1)

Publication Number Publication Date
US20090234372A1 true US20090234372A1 (en) 2009-09-17

Family

ID=36685562

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/083,530 Abandoned US20090234372A1 (en) 2005-10-17 2006-10-17 Epilation Method

Country Status (8)

Country Link
US (1) US20090234372A1 (el)
EP (1) EP1937175B1 (el)
CY (1) CY1116732T1 (el)
ES (1) ES2312304T3 (el)
FR (1) FR2892012B1 (el)
PL (1) PL1937175T3 (el)
PT (1) PT1937175E (el)
WO (1) WO2007045793A2 (el)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110202115A1 (en) * 2007-01-26 2011-08-18 Panasonic Electric Works Co., Ltd. Hair growth modulation device
EP3202352B1 (en) 2016-02-02 2021-08-25 Braun GmbH Hair removal device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5647866A (en) * 1993-11-09 1997-07-15 Zaias; Nardo Method of hair depilation
US5989267A (en) * 1994-09-28 1999-11-23 The General Hospital Corporation Method of hair removal
US6162211A (en) * 1996-12-05 2000-12-19 Thermolase Corporation Skin enhancement using laser light
US6168590B1 (en) * 1997-08-12 2001-01-02 Y-Beam Technologies, Inc. Method for permanent hair removal
US6358242B1 (en) * 1999-11-12 2002-03-19 Ceramoptec Industries, Inc. Post laser treatment for permanent hair removal
US20060210154A1 (en) * 2005-03-15 2006-09-21 L'oreal Skin tone measurement device and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2308307A (en) * 1995-12-18 1997-06-25 Laser Ind Ltd Depilating laser
EP0885629A3 (en) 1997-06-16 1999-07-21 Danish Dermatologic Development A/S Light pulse generating apparatus and cosmetic and therapeutic phototreatment
JP2000316996A (ja) * 1999-05-11 2000-11-21 Ya Man Ltd レーザ脱毛方法
FR2838042B1 (fr) 2002-04-08 2005-03-11 Eurofeedback Sa Dispositif de traitement par emission de flashs lumineux

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5647866A (en) * 1993-11-09 1997-07-15 Zaias; Nardo Method of hair depilation
US5989267A (en) * 1994-09-28 1999-11-23 The General Hospital Corporation Method of hair removal
US6162211A (en) * 1996-12-05 2000-12-19 Thermolase Corporation Skin enhancement using laser light
US6168590B1 (en) * 1997-08-12 2001-01-02 Y-Beam Technologies, Inc. Method for permanent hair removal
US6358242B1 (en) * 1999-11-12 2002-03-19 Ceramoptec Industries, Inc. Post laser treatment for permanent hair removal
US20060210154A1 (en) * 2005-03-15 2006-09-21 L'oreal Skin tone measurement device and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Long-term Photoepilation Using a Broad-spectrum Intense Pulsed Light Source, Sadick, N.S., Weiss, R.A., Shea, C.R., Nagel, H., Nicholson, J., Prieto, VG, 1336-1340, ARCH DERMATOL, Vol 136, Nov 2000 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110202115A1 (en) * 2007-01-26 2011-08-18 Panasonic Electric Works Co., Ltd. Hair growth modulation device
EP3202352B1 (en) 2016-02-02 2021-08-25 Braun GmbH Hair removal device

Also Published As

Publication number Publication date
EP1937175A1 (fr) 2008-07-02
EP1937175B1 (fr) 2015-05-27
ES2312304T3 (es) 2015-09-11
FR2892012A1 (fr) 2007-04-20
WO2007045793A8 (fr) 2007-06-14
PT1937175E (pt) 2015-10-12
WO2007045793A2 (fr) 2007-04-26
FR2892012B1 (fr) 2008-07-18
CY1116732T1 (el) 2017-03-15
PL1937175T3 (pl) 2015-11-30
ES2312304T1 (es) 2009-03-01

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AS Assignment

Owner name: EUROFEEDBACK, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SAFRAOUI, GEORGES;REEL/FRAME:021453/0341

Effective date: 20080818

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION