US20090234372A1 - Epilation Method - Google Patents
Epilation Method Download PDFInfo
- 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
- Authority
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 210000004209 hair Anatomy 0.000 claims abstract description 45
- 239000008280 blood Substances 0.000 claims abstract description 18
- 210000004369 blood Anatomy 0.000 claims abstract description 18
- 230000003325 follicular Effects 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims 2
- 239000000203 mixture Substances 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 3
- 102000001554 Hemoglobins Human genes 0.000 description 2
- 108010054147 Hemoglobins Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003659 hair regrowth Effects 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 241000951490 Hylocharis chrysura Species 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000019612 pigmentation Effects 0.000 description 1
Images
Classifications
-
- 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)
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 (pl) |
EP (1) | EP1937175B1 (pl) |
CY (1) | CY1116732T1 (pl) |
ES (1) | ES2312304T3 (pl) |
FR (1) | FR2892012B1 (pl) |
PL (1) | PL1937175T3 (pl) |
PT (1) | PT1937175E (pl) |
WO (1) | WO2007045793A2 (pl) |
Cited By (2)
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)
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)
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 |
-
2005
- 2005-10-17 FR FR0553147A patent/FR2892012B1/fr active Active
-
2006
- 2006-10-17 WO PCT/FR2006/051043 patent/WO2007045793A2/fr active Application Filing
- 2006-10-17 PL PL06820302T patent/PL1937175T3/pl unknown
- 2006-10-17 US US12/083,530 patent/US20090234372A1/en not_active Abandoned
- 2006-10-17 EP EP06820302.5A patent/EP1937175B1/fr active Active
- 2006-10-17 ES ES06820302.5T patent/ES2312304T3/es active Active
- 2006-10-17 PT PT68203025T patent/PT1937175E/pt unknown
-
2015
- 2015-08-25 CY CY20151100739T patent/CY1116732T1/el unknown
Patent Citations (6)
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)
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)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
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 |