WO2007073024A2

WO2007073024A2 - Method of curing inflammatory acne by using carbon lotion and pulsed laser

Info

Publication number: WO2007073024A2
Application number: PCT/KR2006/002043
Authority: WO
Inventors: Hae Lyung Hwang; Sung Huan Gong; Jing Mei Li
Original assignee: Max Engineering Ltd.
Priority date: 2005-12-23
Filing date: 2006-05-29
Publication date: 2007-06-28
Also published as: US20080319431A1; WO2007073024A8; US8048064B2

Description

METHOD OF CURING INFLAMMATORY ACNE BY USING CARBON LOTION AND PULSED LASER

Technical Field

[1] The present invention relates to an acne curing method, and more particularly to a method of curing inflammatory acne by applying a carbon lotion onto a face covered with the acne, irradiating the applied carbon lotion with a laser pulse having a pulse width of microsecond, and irradiating the applied carbon lotion with a laser pulse having a pulse width of nanosecond to sterilize acne bacilli and open skin pores clogged with sebum, thereby entirely treating the inflammatory acne. Background Art

[2] It is known that the onset of acne is generally caused by the following four reasons:

1) excessive production of sebum; 2) excessive cell division of follicular epithelium and thus blocking of pores; 3) production of inflammation due to proliferation of Pro- pionibacterium acne (P.acne) and generation of prefatty acid; and 4) inflammation of follicle and its surrounding area. A major factor affecting the pathogeny mechanism comprises climate or weather, season, modification of gene or hormone, skin wastes, and others.

[3] The onset causes of the acne will be described in detail with reference to the accompanying drawings.

[4] FlG. 1 is a cross-sectional view schematically illustrating the surrounding area of a pore, and FlG. 2 is a cross-sectional view schematically illustrating inflammatory acne developed around the pore.

[5] Referring to FlGs. 1 and 2, if a sebum 4 is excessively secreted from a sebum gland

2, the sebum 4 is not smoothly discharged from the sebum gland 2, and thus is accumulated in a pore 8. The prepatty acid generated by Propionibacterium acne which is proliferated in the pore 8 stimulates the skin around the pore, which can cause inflammation in the wall of a hair follicle and an area around the pore.

[6] With the inflammation, a stratum corneum Sl is abnormally proliferated around the pore 8, and edema caused by the inflammation 10 blocks the pore 8 to further obstruct the smooth discharge of the sebum. Hence, symptoms of acne are developed on the skin. In the drawings, reference numeral S2 denotes an epidermal layer, S3 denotes a mechanisms as described above. [8] The acne developed by the above reasons is generally cured by the following con- ventional methods:

[9] 1) a method of dosing a patient with drugs such as antibiotics, retinoids, or steroid;

[10] 2) a method of using an external application; and

[11] 3) a surgical method such as comedo extraction, chemical peeling, or the like.

[12] However, the conventional methods have a limited effect, and give rise to several side effects.

[13] In particular, in case of the chemical peeling in which a chemical drug is applied onto the epidermis to peel off the epidermal layer, the clogged pores are opened to allow the sebum to be smoothly discharged, and the inflamed tissues are eliminated from the skin. However, experienced operators are required, and it is not possible to precisely control a penetrated depth when the drugs are applied, thereby possibly giving rise to side effects, for example, scar or hyper-pigmentation caused by excessive peeling of the epidermal layer. Although a laser having a wavelength of about 400 nm or intense pulsed light is used to cure the acne, because it cannot open the clogged pores, a desired curing effect is not expected. Any method cannot effectively treat the acne to date.

Disclosure of Invention Technical Problem

[14] Therefore, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a method of curing inflammatory acne by using a carbon lotion and a pulsed laser, in which the carbon lotion applied onto a skin is irradiated with a first laser pulse having a relatively long pulse length (i.e., microsecond), so that stratum corneum is separated from an epidermal layer of the skin so as to be easily removed from the epidermal layer, the stratum corneum is eliminated by the reaction of thermal effect, and the epidermal layer and a dermal layer are stimulated to activate generation or reorganization of cells such as collagen and thus further accelerate regeneration of the skin.

[15] Another object of the present invention is to provide a method of curing inflammatory acne by using a carbon lotion and a pulsed laser, in which the carbon lotion applied onto a skin is irradiated with a second laser pulse having a relatively short pulse length (i.e., nanosecond), so that carbon powders existed in pores are burst out to eliminate a stratum corneum which is already separated by a first laser pulse and to open the pores and passages of the pores clogged by sebum, bacteria, keratin, or the

[16] Further another object of the present invention is to provide a method of curing inflammatory acne by using a carbon lotion and a pulsed laser, in which the carbon lotion applied onto a skin is irradiated with a first laser pulse having a relatively long pulse length (i.e., microsecond) and a second laser pulse having a relatively short pulse length (i.e., nanosecond), thereby sterilizing acne bacilli such as Propionibacterium acne and thus eliminating the onset causes of acne. Technical Solution

[17] In order to accomplish the above-mentioned objects, there is provided a method of curing inflammatory acne by using a carbon lotion and a pulsed laser, the method comprising the steps of: applying the carbon lotion onto epidermis to be cured and pores; and irradiating the carbon lotion with a laser pulse to heat and burst the applied carbon lotion.

[18] The irradiating step comprises irradiating the applied carbon lotion with a first laser pulse having a first pulse width to heat the carbon lotion, and irradiating the applied carbon lotion with a second laser pulse having a second pulse width shorter than the first pulse width to burst the carbon lotion in the pore, after the first laser pulse is irradiated. Advantageous Effects

[19] According to the present invention, the method of curing the inflammatory acne by using the carbon lotion and the pulsed laser has the following effects.

[20] 1) The carbon lotion applied onto the epidermis is irradiated with the first laser pulse having a relatively long pulse length (i.e., microsecond) and the second laser pulse having a relatively short pulse length (i.e., nanosecond), in order to simply and effectively cure the inflammatory acne.

[21] 2) The carbon lotion applied onto the epidermis is irradiated with the first laser pulse having a relatively long pulse length (i.e., microsecond), so that the stratum corneum is evenly eliminated by the heat generated from the carbon lotion, and the epidermal layer and the dermal layer are stimulated.

[22] By stimulating the epidermal layer and the dermal layer, the generation or reorganization of cells such as collagen is activated, and thus the regeneration of the skin cells is further accelerated.

[23] 3) Through the uniform regeneration of the dermal cells, the wound is quickly closed, and it can prevent the scar due to the acne.

[24] 4) The carbon lotion applied onto the epidermis is irradiated with the second laser pulse having a relatively short pulse length (i.e., nanosecond), in order to burst out the cleanly removed from the pore, so that the passage of the pore clogged by the sebum, the bacteria, the keratin, and others is completely opened. [26] Since the passage of the pore is completely opened, the secretion of the sebum gland can be adjusted. [27] 5) Since the carbon lotion applied onto the epidermis is irradiated with the first laser pulse having a relatively long pulse length (i.e., microsecond) and the second laser pulse having a relatively short pulse length (i.e., nanosecond), acne bacilli such as Pro- pionibacterium acne are sterilized to eliminate the onset causes of acne. [28] 6) According to the above effects, proper prognosis is obtained in the process of curing the acne.

Brief Description of the Drawings [29] The above objects, other features and advantages of the present invention will become more apparent by describing the preferred embodiments thereof with reference to the accompanying drawings, in which: [30] FlG. 1 is a cross-sectional view schematically illustrating a surrounding area of a pore. [31] FlG. 2 is a cross-sectional view schematically illustrating inflammatory acne produced around a pore. [32] FlG. 3 is a flow diagram explaining a method of curing inflammatory acne by using a carbon lotion and a pulsed laser according to an embodiment of the present invention. [33] FlG. 4 is a cross-sectional view schematically illustrating the epidermis applied with a carbon lotion. [34] FlG. 5 is a conceptual view explaining the case a first laser pulse is irradiated onto a carbon lotion.

[35] FlG. 6 is a view illustrating carbon powders left after a first laser pulse is irradiated.

[36] FlG. 7 is a conceptual view explaining the case a second laser pulse is irradiated onto a carbon lotion. [37] FlG. 8 is a view illustrating a surround area of acne after first and second laser pulses are irradiated.

Best Mode for Carrying Out the Invention [38] Now, a method of curing inflammatory acne by using a carbon lotion and a pulsed laser according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. [39] FlG. 3 is a flow diagram explaining a method of curing inflammatory acne by using applied with the carbon lotion. [40] Firstly, after the epidermis of a skin to be treated is clearly cleaned, a carbon lotion 20 (hereinafter referred to as carbon powders, since the carbon lotion consists of powders) is evenly applied onto the epidermis and pores 8 (step S310), as shown in FTGs. 3and 4.

[41] The applied thin carbon lotion 20 is evenly irradiated with a first laser pulse Ll having a pulse width of microsecond, preferably 100 μs to 1000 μs, by using a pulsed Nd: YAG laser (not shown) (oscillation wavelength: 1064 nm) (step S320). The reason why the carbon lotion 20 is irradiated with the relatively long pulse of microsecond is that laser energy is transferred to the carbon lotion to emit heat.

[42] The first laser pulse Ll has a pulse length similar to a pumping time of a lamp (not shown) of the Nd: YAG laser.

[43] The reason which the carbon lotion 20 is used an igniter is that the carbon lotion well absorbs the light of 1064 nm which is the oscillation wavelength of the Nd: YAG laser.

[44] When the carbon lotion 20 is irradiated with the first laser to absorb the energy, the heat is generated from the carbon lotion 20, and then the carbon lotion starts to burn. The burning state of the carbon lotion 20 is designated by reference numeral 20 in Fig. 5 which is a conceptual view explaining the case the first laser pulse is irradiated onto the carbon lotion.

[45] A stratum comeum Sl is separated from an epidermis by the heat Hl generated from the carbon lotion 20, and simultaneously, an epidermal layer S2 and a dermal layer S3 are stimulated to activate generation or reorganization of cells such as collagen and thus further accelerate regeneration of the skin. In FlG. 6 which is a view illustrating the carbon powders left after the irradiation of the first laser pulse, the stratum corneum which is partially left on the stratum corneum after it is mostly removed is indicated by reference numeral Sl'.

[46] Also, burning of the carbon lotion causes Propionibacterium acne to be sterilized.

As a result, the inflammation 10 developed around the pore by the Propionibacterium acne is cured.

[47] The carbon lotion 20 applied onto the epidermis is mostly removed by the first laser pulse Ll, but the carbon powders penetrated into the pore 8 are left as it is.

[48] FlG. 7 is a conceptual view explaining the case the second laser pulse is irradiated onto the carbon lotion.

[49] After the acne has been treated by the first laser pulse, as shown in FlG. 7, the left than that of the first laser pulse Ll, preferably a short pulse length of nanosecond. [50] More preferably, the second laser pulse L2 has a pulse width of 5 ns to 50 ns.

According to clinical tests, the best effect is obtained by the second pulse L2 having the pulse width of 5 ns to 50 ns.

[51] When the carbon lotion 20 partially left on the epidermis and the pore 8 is irradiated by the second laser pulse from the Q-switch of the Nd-YAG laser, the carbon lotion 20 absorbs the energy of the second laser pulse having a short pulse width of nanosecond.

[52] Since the second laser pulse has a very short pulse length, the time in which the carbon powders absorb the energy. As a result, the temperature of the carbon powders is abruptly raised.

[53] The carbon powders with temperature abruptly raised are ruptured into small debris.

If the carbon powders are burst in the pore 8, the stratum corneum S 1 peeled off from the epidermis by the laser beam of the first laser pulse is completely removed therefrom.

[54] Also, when the carbon powders are burst in the pore 8, old sebum 4, debris of keratin 6, and others, which are accumulated in the pore 8, are cleanly removed from the pore 8. As a result, passages of the pores clogged by sebum, bacteria, keratin, or the like are entirely opened.

[55] Further, the second laser pulse L2 gives thermal stimulation to the inflammation around the pores to further accelerate the treatment of the inflammation.

[56] After the stratum corneum S 1 is removed from the epidermis by the radiation of the first laser pulse, the partially left stratum comeum Sl is entirely removed by the burst of the carbon lotion 20, thereby keeping the skin state clean and thus preventing development of the acne.

[57] FIG. 8 is a view illustrating the surround area of the acne after the first and second laser pulses are irradiated.

[58] Referring to FIG. 8, the burst of the carbon powders by the irradiation of the second laser pulse having a short pulse width causes the pores to open, which can keep the pores clean, and restraining the excessive secretion of sebum gland, thereby curing the acne.

[59] Preferably, the first laser pulse Ll and the second laser pulse L2 are adapted to have energy density of 1.5 J/cm to 3.0 J/cm , according to the clinical tests of the present invention.

[60] With the method of curing the inflammatory acne according to the present invention, the carbon lotion 20 is irradiated with the first laser pulse having a relatively long pulse length (i.e., microsecond), so that the stratum corneum is separated from the collagen and thus further accelerate regeneration of the skin. Further, it sterilizes acne bacilli such as Propionibacterium acne to eliminate the inflammation 10. Then, the carbon powders are irradiated with the second laser pulse having a relatively short pulse length (i.e., nanosecond), so that the carbon powders are burst out to open the clogged pores and thus keep the pores clean, and to restrain the excessive secretion of the sebum gland and thus basically eliminate the onset causes of acne, thereby curing the acne.

[61] In this embodiment, the irradiation of the first laser pulse and second laser pulse is achieved by using the Nd: YAG laser having the Q-switch, but the present invention is not limited thereto. It is, of course, noted that the case of using a laser capable of oscillating a laser pulse of nanosecond after a laser pulse of microsecond is oscillated belongs to the scope of the present invention.

[62] The forgoing embodiments are merely exemplary and are not to be construed as limiting the present invention. The present teachings can be readily applied to other types of apparatuses. The description of the present invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. Industrial Applicability

[63] As apparent from the above description, the method of curing the inflammatory acne by using the carbon lotion and the pulsed laser, according to the present invention, has the following effects.

[64] 1) The carbon lotion applied onto the epidermis is irradiated with the first laser pulse having a relatively long pulse length (i.e., microsecond) and the second laser pulse having a relatively short pulse length (i.e., nanosecond), in order to simply and effectively cure the inflammatory acne.

[65] 2) The carbon lotion applied onto the epidermis is irradiated with the first laser pulse having a relatively long pulse length (i.e., microsecond), so that the stratum corneum Sl is evenly eliminated by the heat generated from the carbon lotion, and the epidermal layer S2 and the dermal layer S3 are stimulated.

[66] By stimulating the epidermal layer and the dermal layer, the generation or reorganization of cells such as collagen is activated, and thus the regeneration of the skin cells is further accelerated.

[67] 3) Through the uniform regeneration of the dermal cells, the wound is quickly closed, and it can prevent the scar due to the acne.

[68] 4) The carbon lotion applied onto the epidermis is irradiated with the second laser pulse having a relatively short pulse length (i.e., nanosecond), in order to burst out the

[69] Through the open of the pore, the old sebum, the debris of keratin, and others are cleanly removed from the pore 8, so that the passage of the pore 8 clogged by the sebum, the bacteria, the keratin, and others is completely opened.

[70] Since the passage of the pore 8 is completely opened, the secretion of the sebum gland can be adjusted.

[71] 5) Since the carbon lotion applied onto the epidermis is irradiated with the first laser pulse having a relatively long pulse length (i.e., microsecond) and the second laser pulse having a relatively short pulse length (i.e., nanosecond), acne bacilli such as Pro- pionibacterium acne are sterilized to eliminate the onset causes of acne.

[72] 6) According to the above effects, proper prognosis is obtained in the process of curing the acne.

Claims

[1] A method of curing inflammatory acne by using a carbon lotion and a pulsed laser, the method comprising the steps of: applying the carbon lotion onto epidermis to be cured and pores; and irradiating the carbon lotion with a laser pulse to heat and burst the applied carbon lotion. [2] The method as claimed in claim 1, wherein the irradiating step comprises irradiating the applied carbon lotion with a first laser pulse having a first pulse width to heat the carbon lotion; and irradiating the applied carbon lotion with a second laser pulse having a second pulse width shorter than the first pulse width to burst the carbon lotion in the pore, after the first laser pulse is irradiated. [3] The method as claimed in claim 2, wherein the first pulse width is in a range of

100 μs to 1000 μs. [4] The method as claimed in claim 3, wherein the second pulse width is a nanosecond. [5] The method as claimed in any one of claims 1 to 4, wherein the irradiation of the first laser pulse and second laser pulse is achieved by an Nd: YAG laser, in which after the first laser pulse is irradiated, the second laser pulse is irradiated by a Q- switch. [6] The method as claimed in claim 5, wherein the Nd: YAG laser has an oscillation wavelength of 1064 nm