Paper diaper suitable for detecting urinary tract infection and design method of detection structure in paper diaper

Abstract

The invention provides a paper diaper suitable for detecting urinary tract infection and a design method of a detection structure therein, the paper diaper comprises a closed cavity defined by a closed layer, a first urine display strip is arranged in the closed cavity, a second urine display strip is arranged outside the closed cavity, a part of the closed layer is made of a water permeable material layer, and the second urine display strip is made of a water permeable material layer. The pore diameter of the water-permeable material layer is suitable for liquid in the urine to permeate, and is also suitable for blocking inflammation products in the urine.

Description

Technical Field

[0001] The present invention relates to the field of nursing products, and in particular to a diaper suitable for detecting urinary tract infection and a design method of a detection structure therein. Background Art

[0002] Urinary tract infection is a common disease for the elderly who have been bedridden for a long time, infants, and people who are unconscious and unable to take care of themselves. Severe urinary tract infection can even cause liver and kidney failure, which is life-threatening. If the infection can be detected in time in the early stages, it can be cured by going to the hospital for simple treatment.

[0003] However, the elderly who are bedridden and unconscious, patients who cannot take care of themselves, and infants and young children are unable to accurately express their discomfort. Especially for the elderly, due to the degeneration of sensory functions, if the condition is not discovered in time, it may be life-threatening when it becomes serious. Therefore, it is particularly important for the above-mentioned groups to detect urinary tract infection in a timely manner.

[0004] In response to the above-mentioned problems, there is a method in the prior art to test urine by setting test strips or test blocks in diapers to detect relevant abnormalities, such as the Chinese patent applications with publication numbers CN103099711A, CN104434403A, and CN107714304A. In the current similar schemes, all are based on dry chemical detection, and use test strips or test blocks provided with indicators or chemical reagents to detect analytes in urine, which makes the above-mentioned diaper products and their production have higher costs and more stringent process requirements. At the same time, for parents of infants, considering that compared with traditional diapers, they contain multiple chemical reagents, they may have concerns about whether they will affect the health of the infant, which makes it more difficult to promote their use in infant diapers. Summary of the Invention

[0005] In view of the problems in the prior art, the present invention provides a diaper suitable for detecting urinary tract infections, the diaper comprising a closed cavity defined by a closed layer, a first urine-indicating strip being arranged in the closed cavity, and a second urine-indicating strip being arranged outside the closed cavity, the closed layer being partially made of a water-permeable material layer, the pore size of the water-permeable material layer being suitable for the passage of liquid in urine and for blocking inflammatory products in urine.

[0006] Furthermore, the water-permeable material layer is a microporous membrane.

[0007] Furthermore, the diaper further includes a waterproof layer disposed on the outermost side, and the waterproof layer and the water-permeable material layer together define the sealing layer.

[0008] Furthermore, the first urine-indicating strip and the second urine-indicating strip are both arranged adjacent to the waterproof layer.

[0009] Furthermore, the diaper further comprises a first moisture-absorbing material layer, and the first urine-indicating strip and the water-permeable material layer are both arranged adjacent to the first moisture-absorbing material layer.

[0010] Furthermore, a second hygroscopic material layer is provided in the closed cavity, and the second hygroscopic material layer is provided between the water-permeable material layer and the first urine-indicating strip.

[0011] Furthermore, the first urine-indicating strip and the second urine-indicating strip are aligned along their extension directions.

[0012] Furthermore, the first urine-indicating strip partially overlaps with the second urine-indicating strip.

[0013] Furthermore, the diaper comprises two closed cavities, and the pore sizes of the water-permeable material layers used in the two closed cavities are different.

[0014] The present invention also provides a design method for a detection structure in a diaper suitable for detecting urinary tract infection, the design method comprising: providing a closed cavity defined by a closed layer, and providing urine-indicating strips inside and outside the closed cavity, respectively; a portion of the closed layer is made of a water-permeable material layer, the pore size of the water-permeable material layer being suitable for the passage of liquid in urine and at the same time suitable for blocking inflammatory products in urine, thereby enabling the determination of whether a urinary tract infection occurs by the color difference of the urine-indicating strips inside and outside the closed cavity.

[0015] Compared to the prior art, the present invention's diapers suitable for detecting urinary tract infections and the design method of the detection structure therein break through the limitations of existing products that often rely on chemical methods to detect inflammatory urine based on its biochemical properties. Instead, it utilizes the physical properties of inflammatory urine, uses a water-permeable material layer with a specific pore size to detect the difference in permeability between normal urine and inflammatory urine, and combines it with the urine display strips in existing products to effectively and significantly indicate the urine test results. The present invention's diapers suitable for detecting urinary tract infections only require a water-permeable material layer to be added to existing products to achieve the function of detecting urinary tract infections. Compared to existing products that use test strips or test blocks based on dry chemical methods, the process requirements and production costs are significantly reduced. No additional chemical reagents are introduced into the product, making it suitable for use by infants and having strong promotion and application value.

[0016] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is a schematic structural diagram of a diaper suitable for detecting urinary tract infection according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Cross-sectional view along AA direction;

[0019] Figure 3 These are microscopic photographs of the processed urine of the normal group, mild inflammation group, and moderate-severe inflammation group;

[0020] Figure 4 It is a schematic diagram of the test results of a diaper suitable for detecting urinary tract infection according to an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1—Detection area,

[0023] 10—closed cavity,

[0024] 100—waterproof layer,

[0025] 200—hygroscopic layer,

[0026] 300—Inner layer,

[0027] 400—permeable material layer,

[0028] 500—first urine display strip,

[0029] 600—Second urine strip,

[0030] 610—upper segment urine display strip,

[0031] 620—lower urine display strip,

[0032] 700—Moisture-absorbing layer. DETAILED DESCRIPTION

[0033] In the description of the embodiments of the present invention, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the invention. The accompanying drawings are schematic or conceptual diagrams, and the relationships between the thickness and width of various parts, as well as the proportional relationships between various parts, etc., are not entirely consistent with their actual values.

[0034] The idea of ​​the present invention is to utilize the urine-indicating strips in existing diapers and design a detection structure in the diapers for detecting urinary tract infections. Specifically, a closed cavity defined by a closed layer is provided, and urine-indicating strips are provided inside and outside the closed cavity respectively. Part of the closed layer adopts a water-permeable material layer, and the pore size of the water-permeable material layer is suitable for the passage of liquid in urine and at the same time suitable for blocking inflammatory products in urine, so that whether there is a urinary tract infection can be judged by the color difference of the urine-indicating strips inside and outside the closed cavity.

[0035] Figure 1 A schematic structural diagram of a diaper suitable for detecting urinary tract infection according to an embodiment of the present invention is shown, wherein a detection structure for detecting urinary tract infection is provided in a detection area 1 (a dotted box is used to indicate this area) at the crotch position of the diaper. Specifically, whether a urinary tract infection is present is determined by detecting whether the urine contains inflammatory products.

[0036] like Figure 2 As shown, the diaper is provided with a waterproof layer 100, a moisture-absorbing layer 200 and an inner layer 300 from the outside to the inside. In the detection area 1, a water-permeable material layer 400 is provided between the waterproof layer 100 and the moisture-absorbing layer 200. The water-permeable material layer 400 and the waterproof layer 100 define a closed cavity 10. A first urine-indicating strip 500 is provided in the closed cavity 10. At the same time, a second urine-indicating strip 600 is provided outside the closed cavity 10. The second urine-indicating strip 600 is provided between the waterproof layer 100 and the moisture-absorbing layer 200. This is also the usual setting position of the urine-indicating strip in existing diapers. The urine indicator strips in existing diapers will change color when they come into contact with liquid. When the moisture-absorbing layer of the diaper is saturated with water, urine will flow to the outer layer. When it contacts the urine indicator strips, it will cause it to show color, change color or fade, thereby prompting the need to change the diaper. The present invention does not improve the urine indicator strips and waterproof layer, moisture-absorbing layer and inner layer of the diaper. The urine indicator strips mentioned in the article are all urine indicator strips with the above functions in the prior art. In the implementation of the present invention, urine indicator strips of any type or color-display principle, as well as the waterproof layer, moisture-absorbing layer and inner layer used in existing diapers can be used without limitation.

[0037] A hygroscopic layer 700 is also provided in the closed cavity 10. The hygroscopic layer 700 is provided between the first urine-indicating strip 500 and the water-permeable material layer 400, so that urine entering and passing through the water-permeable material layer 400 will first contact the hygroscopic layer 700. As the hygroscopic layer 700 becomes saturated with water, the urine will then penetrate and contact the first urine-indicating strip 500.

[0038] Permeable material layer 400 is a thin film material with a predetermined pore size, such as an existing microporous membrane used for filtration. The pore size is selected to allow the urine to pass through while simultaneously blocking inflammatory products in the urine. Specifically, permeable material layer 400 is capable of filtering out inflammatory products in the urine. Normal urine contains only a minimal amount of bladder exfoliated cells and impurities (such as a small number of tiny uric acid crystals and a small number of lymphocytes), which can easily permeate permeable material layer 400. However, in the case of a urinary tract infection, urine will contain a large number of inflammatory cells and exfoliated epithelium, which can be blocked by permeable material layer 400.

[0039] In this embodiment, the principle that the detection structure in the detection area 1 can be used to judge urinary tract infection is that when the moisture-absorbing layer 200 of the diaper gradually absorbs water and becomes saturated from the inside out, urine gradually passes through the moisture-absorbing layer 200 and reaches the waterproof layer 100. At this time, the urine contacts the second urine-indicating strip 600, which can cause it to change color rapidly. At the same time, if it is normal urine, it can also pass through the water-permeable material layer 400 into the closed cavity 10, and further contact the first urine-indicating strip 500 after the moisture-absorbing layer 700 is saturated with water, causing it to change color rapidly. If it is inflammatory urine, a large amount of inflammatory products in the urine will quickly block the pores of the water-permeable material layer 400, so that the liquid in the urine cannot enter the closed cavity 10, and the first urine-indicating strip 500 will not change color. Therefore, by comparing the colors of the first urine-indicating strip 500 and the second urine-indicating strip 600, it is possible to judge whether there is a urinary tract infection.

[0040] It is true that when inflammatory urine reaches the water-permeable material layer 400 and is not yet completely blocked by inflammatory products, some urine will penetrate the water-permeable material layer 400 and enter the closed cavity 10. However, this small amount of urine will be absorbed by the moisture-absorbing layer 700 and will not cause the color of the first urine-indicating strip 500 to change. Even if a very small amount of urine still contacts the first urine-indicating strip 500, it will not cause the entire first urine-indicating strip 500 to change color, but only some sporadic or mottled discoloration spots or blocks will be distributed. However, this is sufficient to be significantly different from the second urine-indicating strip 600 and be used to determine whether a urinary tract infection has occurred. At the same time, this situation can also be used to assist in determining the severity of a urinary tract infection. That is, compared with sporadic or mottled color changes, no color change at all can be considered to indicate that there are more inflammatory products in the urine and the urinary tract infection is more serious.

[0041] In a verification experiment, the urine samples of each group to be tested were first grouped according to the results of routine urine tests in the laboratory, specifically divided into a normal group, a mild inflammation group, and a moderate-to-severe inflammation group. First, the urine of each group was not processed in any way, and 200ul of the original solution was added to a special cell adhesion slide. It was allowed to settle naturally for more than 20 minutes until it was completely dry. The slide was then stained with hematoxylin for 5 minutes, differentiated with 1% hydrochloric acid alcohol differentiation solution for 2 seconds, rinsed with running water for 5 minutes until the cells turned blue, and then stained with eosin for 10 seconds. The excess eosin stain was washed off with gradient alcohol dehydration, and xylene was used for transparency. The slide was sealed with neutral resin, and the amount of cells in each group of urine was judged under a microscope to further confirm the number and size of inflammatory cells and epithelial cells in the urine. Figure 3 , where from left to right are photos of samples from the normal group, mild inflammation group, and moderate to severe inflammation group under a microscope. It can be seen that there is basically no residue in the urine of the normal group, while there is a large amount of residue in the urine of the mild inflammation group and the moderate to severe inflammation group. Among the two, the urine of the moderate to severe inflammation group has more residue.

[0042] Based on the above microscopic observations, HOLOGIC medical microporous membranes were selected for subsequent experiments, with pore sizes of 30μm, 20μm, and 10μm. Absorbent tissue of a certain thickness was cut from diaper pads, and microporous membranes and pH test paper were placed on the top and bottom sides of the absorbent tissue paper to create experimental samples. Finally, 5ml of urine was dripped onto the above experimental samples from 25 samples each of the normal group, mild inflammation group, and moderate-to-severe inflammation group. The experiment lasted 20 minutes, during which the color change of the pH test paper in each sample was observed. The results are shown in the table below.

[0043]

[0044] In the above experiments, as long as the pH test paper changes color, even if it is a partial color change, it is classified as a color change. Finally, according to the observation results, it was found that the final state of all color changes occurred within 1 minute of adding the urine sample. Among them, the sample using a 20um microporous membrane can effectively and significantly distinguish between inflammatory urine and normal urine. At the same time, according to the judgment method and results of the above experiments, it can be expected that there will be a corresponding pore size in the interval greater than 20um pore size that can be used to distinguish between the mild inflammation group and the moderate to severe inflammation group, such as the mild inflammation group and the moderate to severe inflammation group have a difference in whether the color changes or not, or a difference in the size of the color change area. In view of this, two detection areas are provided on the diapers of other embodiments, and the water-permeable material layers used in the detection structures of the two detection areas have different pore sizes, so that the presence of a urinary tract infection can be qualitatively determined by one of the detection structures, and the degree of the urinary tract infection can be auxiliaryly indicated by the other detection structure.

[0045] In this embodiment, the second urine indicating strip 600 is composed of an upper urine indicating strip 610 and a lower urine indicating strip 620. The upper urine indicating strip 610, the lower urine indicating strip 620 and the first urine indicating strip 500 have the same width. The upper urine indicating strip 610 and the lower urine indicating strip 620 are respectively arranged at the upper and lower ends of the first urine indicating strip 500, and the three are aligned in the longitudinal direction. In another preferred embodiment, the upper urine indicating strip 610 partially overlaps with the upper end of the first urine indicating strip 500, and the lower urine indicating strip 620 partially overlaps with the lower end of the first urine indicating strip 500, that is, one end of the upper urine indicating strip 610 and the lower urine indicating strip 620 will cover the edge of the water-permeable material layer 400, so that when normal urine causes the urine indicating strip to change color, a continuous color band of the same color composed of the upper urine indicating strip 610, the first urine indicating strip 500 and the lower urine indicating strip 620 can be seen. When inflammatory urine causes the upper urine indicating strip 610 and the lower urine indicating strip 620 to change color, the first urine indicating strip 500 does not change color, and a color band with a break in the middle can be seen. Figure 4 , which exemplarily shows the color distinction of the urine display strips before detection, normal urine test results and inflammatory urine test results in the detection area from left to right.

[0046] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A diaper suitable for detecting urinary tract infection, characterized in that: It includes a closed cavity defined by a closed layer, a first urine-indicating strip is arranged in the closed cavity, and a second urine-indicating strip is arranged outside the closed cavity. The closed layer is partially made of a water-permeable material layer, and the pore size of the water-permeable material layer is suitable for the liquid in the urine to pass through, and is also suitable for blocking inflammatory products in the urine.

2. The diaper suitable for detecting urinary tract infection according to claim 1, characterized in that: The water-permeable material layer is a microporous membrane.

3. The diaper suitable for detecting urinary tract infection according to claim 1, characterized in that: The invention also includes a waterproof layer arranged on the outermost side, wherein the waterproof layer and the water-permeable material layer together define the sealing layer.

4. The diaper suitable for detecting urinary tract infection according to claim 3, characterized in that: The first urine-indicating strip and the second urine-indicating strip are both arranged adjacent to the waterproof layer.

5. The diaper suitable for detecting urinary tract infection according to claim 4, characterized in that: It also includes a first hygroscopic material layer, and the first urine-indicating strip and the water-permeable material layer are both arranged adjacent to the first hygroscopic material layer.

6. The diaper suitable for detecting urinary tract infection according to claim 1, characterized in that: A second hygroscopic material layer is further provided in the closed cavity, and the second hygroscopic material layer is provided between the water-permeable material layer and the first urine-indicating strip.

7. The diaper suitable for detecting urinary tract infection according to claim 1, characterized in that: The first urine-indicating strip and the second urine-indicating strip are aligned along their extension directions.

8. The diaper suitable for detecting urinary tract infection according to claim 7, characterized in that: The first urine-indicating strip partially overlaps with the second urine-indicating strip.

9. The diaper suitable for detecting urinary tract infection according to claim 1, characterized in that: It comprises two closed cavities, and the pore sizes of the water-permeable material layers used in the two closed cavities are different.

10. A method for designing a detection structure in a diaper suitable for detecting urinary tract infection, characterized in that: A closed cavity defined by a closed layer is provided, and urine indicating strips are provided inside and outside the closed cavity respectively. Part of the closed layer adopts a water-permeable material layer, and the pore size of the water-permeable material layer is suitable for the liquid in the urine to pass through, and is also suitable for blocking inflammatory products in the urine, so that whether there is a urinary tract infection can be judged by the color difference of the urine indicating strips inside and outside the closed cavity.

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