JP2024001854A - Mew method of measuring skin sag amount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new method capable of easily measuring a skin sag amount of a person or the like in a perfumery field or the like.

SOLUTION: A method of measuring a skin sag amount comprises the steps of: (1) turning a subject into a static standing posture; (2) providing a reference point on the skin of the subject; (3) setting a point different from the reference point as a measurement point; (4) applying a tape to the subject and applying a weight to the tape with the reference point as a fulcrum; (5) setting the upper end of the tape as a reference point and setting the lower end of the tape as a measurement point; (6) obtaining an image by imaging the skin surface at the vertical position in a state of including at least the reference point and measurement point in the static standing posture of the subject; and (7) measuring a movement amount of the measurement point from the image obtained in the step (6).

SELECTED DRAWING: None

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to, for example, a method for measuring the amount of skin sagging in humans.

Sagging skin is one of the skin aging phenomena that many people are concerned about. The causes of facial sagging are said to be due to age, changes in the physical properties of the skin, such as the amount of collagen in the dermis, skin elasticity, and subcutaneous fat thickness. For example, although the relationships between sagging and elasticity and between sagging and subcutaneous fat are clear, it is not known what kind of changes these changes in skin physical properties bring about on the actual skin surface. Methods to improve sagging skin include beauty treatments such as aesthetics and massage, physical methods such as corrective underwear, chemical methods using medicines, cosmetics, and supplements, and methods that combine these methods. There is. Methods to improve sagging skin include beauty treatments such as aesthetics and massage, physical methods such as corrective underwear, chemical methods using medicines, cosmetics, and supplements, and methods that combine these methods. (Patent Document 1, Non-Patent Document 1).

JP2020-157013

Journal of the Japan Society of Cosmetic Engineers, Volume 49, Issue 2, pages 114 to 119, Development of a two-dimensional simple measurement method for facial sagging

The problem to be solved by the present invention is to provide a novel method that can more easily measure the amount of skin sagging of a human subject.

Therefore, as a result of extensive studies, the inventor of the present invention completed the present invention by utilizing gravity using weights.

The present invention includes the following sections.
[Item 1] A method for measuring the amount of skin sagging, comprising:
(1) A step in which the subject assumes a static standing posture;
(2) providing a reference point on the subject's skin;
(3) a step of setting a point different from the reference point as a measurement point;
(4) adding a tape to the subject and a weight to the tape using the reference point as a fulcrum;
(5) using the upper end of the tape as a reference point and the lower end of the tape as a measurement point;
(6) obtaining an image by imaging the vertical skin surface in a static standing posture of the subject, including at least the reference point and the measurement point;
(7) measuring the amount of movement of the measurement point from the image obtained in step (6);
How to measure the amount of skin sagging, including:

It is possible to provide a new method that can more easily measure the amount of skin sagging in humans, etc. in the cosmetics field.

1 is a diagram showing an overview of a monitor test using the method of the present invention described in Example 1. FIG.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated.

(Reference point)
The reference point of the present invention is intended to set a fulcrum. At least one reference point is sufficient, and it is also possible to provide two or more reference points.

The reference points of the present invention can be moles, eyebrows, etc., and can also be the upper part of the eyebrows, between the eyebrows, the root of the nose, the tip of the nose, the philtrum, the chin, the labial folds, the cheeks, the outer corners of the eyes, etc. In the following example, an example will be shown in which the amount of sagging of the skin on the face is measured (an example where a predetermined part of the cheek is used as a reference point).

(Measurement point)
The measurement points of the present invention can be set at one location, two or more locations as appropriate depending on the purpose. For example, when evaluating cosmetics, etc., if you want to check which areas are particularly effective when applied to the entire face, set multiple measurement points at any area and compare changes in the amount of sagging at each measurement point. It can be evaluated as follows. In the present invention, the upper end of the tape is used as a reference point, and the lower end of the tape (a region other than the upper end, a lower region that is not parallel to the upper end in a static standing posture) is used as a measurement point.

(tape)
The tape may be any tape that can adhere to the skin without peeling off. The tape has an adhesive layer on one and/or both sides of the base material of the tape.

(weight)
The material constituting the weight is not particularly limited as long as gravity acts on it, but specifically, metal materials such as steel and SUS, resin materials, etc. can be used. . The shape of the weight is not particularly limited as long as gravity acts on it.

(imaging)
Imaging is performed using an imaging device such as a digital camera, for example, so that at least one reference point and measurement point are included. An image is acquired by imaging, and changes in the shape and area of the skin surface included in the image are ascertained. The image is, for example, a still image or a moving image.

(Static standing posture)
The static standing posture is, for example, the posture described in the literature (Vol. 38 Suppl. No. 2 (46th Japanese Physical Therapy Academic Conference Abstracts), Session ID: OI1-008), but it is This includes not only a posture in which the whole person is standing, but also a posture in which the whole face is in an upright position, for example, while sitting.

(Form of composition)
Compositions used in tests using the method of the present invention (compositions for external use on the skin, etc.) include ampules, capsules, powders, granules, liquids, gels, bubbles, emulsions, sheets, mist, sprays, etc. Appropriate forms of 1) pharmaceuticals, 2) quasi-drugs, 3) topical or systemic skin preparations (for example, basic cosmetics such as lotions, milky lotions, creams, ointments, lotions, oils, packs, etc.) , facial cleansers and skin cleansers such as bar soaps, liquid soaps, hand washes, massage agents, cleansing agents, hair removers, depilatory agents, shaving agents, aftershave lotions, pre-show lotions, shaving creams, foundations, Makeup cosmetics such as lipstick, blush, eye shadow, eyeliner, mascara, perfumes, nail polish, nail enamel, nail enamel remover, poultices, plasters, tapes, sheets, patches, 4) Medicinal and/or cosmetic preparations applied to the scalp and hair (e.g., shampoos, conditioners, hair treatment agents, pre-hair treatment agents, permanent solutions, hair dyes, hair styling agents, etc.) tonics, hair growth/hair nourishing products, poultices, plasters, tapes, sheets, aerosols, etc.), 5) bath additives used by adding them to bath water, 6) other armpit odor preventers, deodorants, and control agents. Examples include perspiration agents, sanitary products, sanitary cotton, and wet tissues.

EXAMPLES Next, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples in any way. In addition, in the following examples, the unit % of the numerical value showing the addition amount of various components means mass %.

Examples of the present invention will be described below. The experimental materials used in the experiments described in Examples are as follows.

[Example 1] Preparation of a lotion used in a monitor test performed using the method of the present invention A lotion used in the monitor test described below was prepared as follows. As shown in Table 1, a lotion containing 1% of mugwort flower extract (Table 1 lotion) was prepared. A placebo lotion (a lotion that does not contain the extract) was prepared as described in Table 2.

(Experiment 1: Human skin monitor test, skin external preparation)
From January 31, 2022, by applying the lotion listed in Table 1 and the placebo lotion listed in Table 2 to designated areas on the face of normal human subjects (13 men and women with an average age of 43.6 years). The test was conducted during March 4, 2022. The lotion having the composition shown in Table 1 was applied at predetermined intervals on one half of the subject's face, and the lotion shown in Table 2 was applied at predetermined intervals on the other half of the subject's face. This predetermined interval is twice a day (morning and evening) for four weeks. The predetermined region is "the entire face."

Skin sagging was measured as described in FIG. A stapler (No. 11-1M (Max Corporation)) was pulled under the adhesive tape (DermaLab ^TM Combo (CORTEX TECHNOLOGY) ELASTICITY probe adhesive tape) with a donut-shaped hole in the center on the subject's cheek. I hung it. As shown in FIG. 1, the adhesive tape was applied at the intersection of a line drawn horizontally from the bottom of the nose on the face and a line drawn vertically from the outer corner of the eye, and the lower part of the inside of the donut circle of the adhesive tape overlapped. In this experiment 1, the reference point was set to a (the upper end of the tape) shown in FIG. 1, and the measurement point was set to b (the lower end of the tape) shown in FIG. 1.

The weight shown in FIG. 1 is a weight (5 g to 20 g). This weight was used in this experiment 1. In this experiment 1, a weight and a clip were fixed with a string, and the clip side was hooked onto a stapler. In Experiment 1, a weight was added to each subject in advance, and the weight was such that the cheek would move 1-2 mm due to gravity.

The appearance of the face before and after weight loading was taken using VISIA ^™ Evolution (Canfield Scientific) to take left and right facial photographs. Photographs were taken before and 4 weeks after the test, respectively. Using photo processing software (Photoshop), images taken before and after weight loading were superimposed, and image analysis software (Digital Microscope VHX-5000 (Keyence Corporation)) was used to compare images before and after 4 weeks of weight loading. The distance traveled by the adhesive tape and the length of the adhesive tape were measured. For the actual moving distance when a weight is loaded, an estimated conversion value was calculated from the length of the adhesive tape and compared. Table 3 shows the results of the comparison (measured results). In Table 3, the value at week 0 is shown as 1.00.

The * mark in Table 3 indicates a significant difference (p<0.05) in the Wilcoxon Rank-Sum Test compared to the value at week 0 (Table 1 lotion application group). At 4 weeks, it was confirmed that sagging was suppressed by applying Table 1 lotion compared to applying Table 2 lotion (placebo lotion).

In addition, at 4 weeks, the values (the length) of the lotion application group in Table 1 and the lotion application group in Table 2 were also compared. The results of this comparison are shown in Table 4. The * mark in Table 4 indicates a significant difference (p<0.05) in the Wilcoxon Rank-Sum Test compared to the value of the lotion application group in Table 2 (assumed to be 100.00). The results of this comparison (Table 4) also indicate that sagging is suppressed by applying the Table 1 lotion compared to applying the Table 2 lotion (placebo lotion).

Moreover, this experiment 1 showed that the method of the present invention can measure the amount of skin sagging.

Although the embodiments (including examples) of the present invention have been described above with reference to the drawings, the specific configuration of the present invention is not limited thereto, and is within the scope of the gist of the present invention. Even if there are design changes, etc., they are included in the present invention.

INDUSTRIAL APPLICATION This invention is utilized as a new method which can more easily measure the amount of skin sagging of humans, etc. in the field of cosmetics and the like.

Claims (1)

A method for measuring the amount of skin sagging,
(1) A step in which the subject assumes a static standing posture;
(2) providing a reference point on the subject's skin;
(3) a step of setting a point different from the reference point as a measurement point;
(4) adding a tape to the subject and a weight to the tape using the reference point as a fulcrum;
(5) using the upper end of the tape as a reference point and the lower end of the tape as a measurement point;
(6) obtaining an image by imaging the skin surface in a vertical position in a static standing posture of the subject, including at least the reference point and the measurement point;
(7) measuring the amount of movement of the measurement point from the image obtained in step (6);
How to measure the amount of skin sagging, including: