RU2057344C1 - Device for determining in vivo skin light conductance - Google Patents

Abstract

FIELD: medical engineering. SUBSTANCE: device has light emitter with tube and photodetector set in front of the emitter. The photodetector is connected to ampere meter. The device also has means for fixing the photodetector and tube position in examining skin properties in reflected and penetrating light flow. The means for fixing the photodetector position for examining skin properties in reflected light is made in form of U-shaped connection of three plates which one side has a glass plate to fix the photodetector and two other plates are connected by means of arc-shaped members. The means for fixing the photodetector and tube position for examining skin properties in penetrating light is made in form of X- shaped connection of two plates one of which is curved and provided with a measuring scale on the shorter portion of the plate for the tube to be set properly. The second plate surface facing skin surface is used for fixing the photodetector. The tube is removable. EFFECT: reduced risk of traumatic lesions; improved physiologic correspondence of values measured. 2 dwg

Description

 The invention relates to medicine, namely to devices that can determine the light transmission of human skin.

A number of instruments are used to study the condition of the skin: pH meters, capillaroscopes, Epitest, etc. [1-3]
The instruments used allow us to study individual skin functions (or several functions), but do not allow to determine the light transmission of human skin.

The closest in technical solution is the device [4]
However, in the description of this method, devices for fixing the photocell and tube of the light emitter are not indicated when examining the skin in reflected and transmitted light.

 The technical result of the invention is to reduce the morbidity and increase the physiological determination of light transmission of human skin.

 A device for determining the light transmission of human skin includes a light emitter with a tube installed in front of it, a photocell connected to an ammeter, and means for fixing the photocell and tube when examining the skin in reflected and transmitted light.

 In FIG. 1 shows a means for fixing a photocell and tube when examining the skin in reflected light; figure 2 is the same when examining the skin in transmitted light.

 The means for fixing the photocell and tube when examining the skin in reflected light is a U-shaped connection of three plates 1, on one side of which a glass plate 2 is rigidly fixed to fix the photocell 4, and the other two are connected by an arcuate element 3 for fixing the tube 6 of the light emitter 7 The tool for fixing the photocell and tube when examining the skin in transmitted light (figure 2) is made in the form of an X-shaped connection of two plates, one of which is curved, and the shorter part is equipped with a change itelnoy dial 8 for setting the tube 6, the light emitter 7, the surface of the second plate facing the skin, intended for fixing the photocell 4, 5 connected to the ammeter.

 In this case, the tube is removable.

 A device for determining the light transmission of human skin works as follows.

Means for fixing the photocell and tube when examining the skin in reflected light (Fig. 1) with a photocell attached to it, which is connected to an ammeter 5, is installed on the studied area of the skin so that the photocell is above the skin surface. The tube 6 of the light emitter 7 is installed in the arcuate element 3 at an angle of 20-30 ^about the surface of the skin and the magnitude of the reflected light from the skin is recorded.

 The means for fixing the photocell and tube when examining the skin in transmitted light (Fig. 2) with the installed photocell 4 connected to the ammeter 5 on the plate 2 is taken for the longer part of the curved plate 1 and installed on the studied area of the skin so that the photocell is on surface of the skin, and then installed on the measuring scale 8 tube 6 of the light emitter 7 vertically to the surface of the skin and measure the scattered light by the skin without a fold and with a fold of the skin.

 The value of the incident light flux is determined by installing a photocell connected to an ammeter, opposite the output of the light flux from the tube of the light emitter.

где t коэффициент светопроводности кожи;
ΔF_t разность величин рассеянного света кожей без складки и со складкой кожи;
F_j величина падающего светового потока;
F_r величина отраженного кожей светового потока.The amount of light transmission of human skin is determined by the formula:
t

where t is the light transmission coefficient of the skin;
ΔF _{t is the} difference between the scattered light values by the skin without fold and with the fold of the skin;
F _{j the} value of the incident light flux;
F _{r the} amount of light reflected by the skin.

Claims (1)

 DEVICE FOR DETERMINING THE LIGHT CONDUCTIVITY OF SKIN IN VIVO, containing a light emitter, a tube mounted in front of it and a photocell connected to an ammeter, characterized in that it is provided with means for fixing the photocell and tube when examining the skin in reflected and transmitted light, while the means for fixing the photocell and the tube when examining the skin in reflected light is made in the form of a U-shaped connection of three plates, on one side of which a glass plate is rigidly fixed to fix the photocell, and two The others are connected by an arcuate element for fixing the tube, and the means for fixing the photocell and tube when examining the skin in transmitted light is made in the form of an X-shaped connection of two plates, one of which is curved and the shorter part is equipped with a measuring scale for installing the tube, and the surface of the second the plate facing the skin is designed to fix the photocell, while the tube is removable.

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