A pad for amniotic fluid detection and a method of using the same

Abstract

The present invention relates to the field of pregnancy and childbirth detection, and specifically to a pad for amniotic fluid detection and a method of using the pad. The pad includes a pad body, and the inside of the pad body includes a surface layer, a water-absorbing layer, an acetone solvent layer, and a pH indicator composition layer from top to bottom in sequence; a first isolation layer that can be pulled out is bonded between the acetone solvent layer and the water-absorbing layer, and a pull rod for pulling out is provided at the end of the first isolation layer; the application can independently select the preparation of reagents and the detection time according to the needs of the parturient; the application can detect the liquid collected by the pad, and realize that the collection and detection are independent of each other, which can avoid the traditional detection pad collecting liquid and performing real-time detection while being worn; and avoid the detected liquid returning to the vagina of the parturient with the pad, reducing the allergy or inflammation caused by the detection substance in the parturient.

Description

Technical Field

[0001] The invention relates to the field of pregnancy and childbirth detection, and in particular to a pad for amniotic fluid detection and a use method thereof. Background Art

[0002] Amniotic fluid leakage and premature spontaneous rupture of the amniotic sac (also called fetal membrane) occur before the onset of labor. About 30%-50% of premature ruptures occur before the 37th week of pregnancy. Amniotic fluid leakage can increase intrauterine infection and disorders in the development of the fetal lung system. The currently commonly used amniotic fluid testing method uses nitrazine yellow pH testing. Since the urine of healthy people is weakly alkaline and weakly acidic, conventional amniotic fluid testing pads are to place the detection reagent or test paper inside the pad. When the pad is used, the collected liquid is mixed with the detection solvent in the pad, and the presence of amniotic fluid is judged by the color change of the reagent.

[0003] However, the testing solvent contains a variety of chemical substances, and the mixed reagent after testing remains inside the pad. During use, the pad will return the mixed liquid after testing to the place where it contacts the mother's skin, which can easily cause infection, inflammation or allergies caused by the mother's allergy to the testing drugs. At the same time, directly storing the prepared testing reagent in the pad will cause the testing reagent to deteriorate due to long-term storage from production to use. Therefore, it is necessary to design a new type of amniotic fluid testing pad and its use method. Summary of the invention

[0004] In view of the above problems, the present invention proposes a pad for amniotic fluid testing, comprising a pad body, wherein the interior of the pad body comprises a surface layer, a water absorption layer, an acetone solvent layer and a pH indicator composition layer from top to bottom; a first isolation layer that can be pulled out is bonded between the acetone solvent layer and the water absorption layer, and a pull rod for pulling out is provided at the end of the first isolation layer; a second isolation layer that can be pulled out is bonded between the solvent layer and the pH indicator composition layer, and a pull ring for pulling out is provided at the end of the second isolation layer, and the two ends of the pad body are upper and lower split structures, and the pull rod and the pull ring are respectively arranged in the middle of the split structures at both ends of the pad body.

[0005] Preferably, the acetone solvent layer is a waterproof structure, and an acetone solvent with an acetone content of more than 90% is arranged inside the acetone solvent.

[0006] Preferably, a pH indicator composition is provided in the pH indicator composition layer, and the pH indicator composition comprises a polymer, a plasticizer, a surfactant, an acid, an ion balance agent and a nitrazine yellow indicator.

[0007] Preferably, the side of the pH indicator composition layer is a transparent layer.

[0008] In order to solve the above technical problems, the present application also provides a method for using the above-mentioned pad for amniotic fluid testing:

[0009] S1. The parturient wears the pad for amniotic fluid detection to collect the liquid to be detected, and the liquid is concentrated and stored in the absorbent layer;

[0010] S2. When the collected liquid needs to be tested for amniotic fluid, the second isolation layer is separated from the solvent layer and the pH indicator composition layer by pulling the pull ring, and the acetone solvent in the solvent layer and the pH indicator composition in the pH indicator composition layer are mutually integrated to form a pH detection indicator, and color is developed on the pH indicator composition layer;

[0011] S3. When the fused acetone solvent and the pH indicator composition show color on the pH indicator composition layer; pull the pull rod to separate the first isolation layer from the solvent layer and the water absorption layer, and the liquid in the water absorption layer penetrates into the pH indicator composition layer and merges with the pH detection indicator; and judge the state of the amniotic fluid according to the color change of the pH indicator composition layer.

[0012] Preferably, the pH detection indicator on the pH indicator composition layer is yellow in color. If the collected liquid is fused with the pH detection indicator and then turns blue in color, it is determined that amniotic fluid is present.

[0013] In summary, the beneficial effects of the present invention are: the present application can independently select the preparation of reagents and detection time according to the actual needs of the parturient; the present application can detect the liquid collected by the pad, realize the independence of collection and detection, and avoid the real-time detection of traditional detection pads when wearing to collect liquid; and avoid the detected liquid returning to the vagina of the parturient with the pad, reducing the allergy or inflammation caused by the detection substance in the parturient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 Shown is a cross-sectional view of the pad body;

[0016] Figure 2 Shown is a schematic diagram of the assembly of the acetone solvent layer.

[0017] Among them, 1. pad body; 2. acetone solvent layer; 3. pH indicator composition layer; 4. pull rod; 5. pull ring. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present application,

[0019] The drawings and preferred embodiments further illustrate the present invention in detail.

[0020] See also Figure 1 , shows a pad for amniotic fluid testing, specifically comprising a pad body 1, the pad body 1 includes a surface layer, a water absorption layer, an acetone solvent layer 2 and a pH indicator composition layer 3 from top to bottom; a first isolation layer that can be pulled out is bonded between the acetone solvent layer 2 and the water absorption layer, and a pull rod 4 is provided at the end of the first isolation layer; a second isolation layer that can be pulled out is bonded between the solvent layer 2 and the pH indicator composition layer 3, and a pull ring 5 for pulling out is provided at the end of the second isolation layer, as shown in FIG. Figure 2 As shown, both ends of the pad body 1 are upper and lower split structures, and the pull rod 4 and the pull ring 5 are respectively arranged in the middle of the split structure.

[0021] The pull rod 4 and the pull ring 5 are arranged inside the upper and lower split structures of the pad body 1. On the one hand, the pull rod 4 and the pull ring 5 are hidden. When there is no need to detect amniotic fluid, the pad for amniotic fluid detection of this scheme is used as a conventional absorption pad; when it is necessary to detect amniotic fluid, the hidden pull rod 4 or the pull ring 5 is found. On the other hand, it is to avoid the pull rod 4 and the pull ring 5 from causing damage to the user. Since the pull rod 4 and the pull ring 5 are used to pull the isolation layer, their material properties are relatively hard. When the pad is used, if the pull rod 4 or the pull ring 5 is in direct contact with the parturient's skin, it is easy to cause pulling damage to the patient. At the same time, the pull rod 4 and the pull ring 5 are arranged in the middle of the split structure, so that the parturient is not easy to feel the existence of the pull rod 4 or the pull ring 5 when using it. And the design of the pull rod 4 and the pull ring 5 makes it easy for the parturient to distinguish the first isolation layer and the second isolation layer when using it.

[0022] The acetone solvent layer 2 is a waterproof structure, and an acetone solvent with an acetone content of more than 90% is arranged inside the acetone solvent layer 2. The acetone solvent layer 2 is made of a flexible waterproof material, which can store a trace amount of acetone solvent and is not easy to be broken when used.

[0023] The pH indicator composition layer 3 contains a pH indicator composition, which includes a polymer, a plasticizer, a surfactant, an acid, an ion balance agent and a nitrazine yellow indicator.

[0024] The side of the pH indicator composition layer 3 is a transparent layer.

[0025] A method for using a pad for amniotic fluid testing comprises the following steps:

[0026] S1. The parturient wears a pad for amniotic fluid testing to collect the liquid to be tested, and the liquid is concentrated and stored in the water-absorbing layer;

[0027] S2. When the collected liquid needs to be tested for amniotic fluid, the second isolation layer is separated from the solvent layer 2 and the pH indicator composition layer 3 by pulling the pull ring 5, and the acetone solvent in the solvent layer 2 and the pH indicator composition in the pH indicator composition layer 3 are mutually integrated to form a pH detection indicator, and color is developed on the pH indicator composition layer 3;

[0028] S3. When the fused acetone solvent and the pH indicator composition develop color on the pH indicator composition layer 3; pull the pull rod 4 to separate the first isolation layer from the solvent layer 2 and the water absorption layer, and the liquid in the water absorption layer penetrates into the pH indicator composition layer 3 and merges with the pH detection indicator; and judge the state of the amniotic fluid according to the color change of the pH indicator composition layer 3.

[0029] The color of the pH detection indicator on the pH indicator composition layer 3 is yellow. If the collected liquid is fused with the pH detection indicator and then turns blue, it is determined that amniotic fluid exists.

[0030] The indicator composition comprises: cellulose acetate and cellulose acetate butyrate; a plasticizer, wherein the plasticizer is triethyl citrate; a surfactant, wherein the surfactant is poloxamer; an acid, wherein the acid is salicylic acid; an ion balance reagent, wherein the ion balance reagent is tri(dodecyl)methylammonium chloride; and an indicator, wherein the indicator is nitrazine yellow.

[0031] This application allows the mother to independently choose the preparation of reagents and the time of testing according to her needs; when testing is not needed, the normal pad can be used, and when testing is needed, the testing reagent can be prepared according to the usage method and targeted testing can be carried out; the collection of sample liquid and amniotic fluid testing can be independent of each other, which can avoid the traditional testing pads from performing real-time testing when collecting liquid; and it can avoid the tested liquid returning to the mother's vagina with the pad, reducing the allergies or inflammation caused by the test substances in the mother.

[0032] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pad for amniotic fluid detection, characterized in that: The invention comprises a protective pad body (1), wherein the interior of the protective pad body (1) comprises, from top to bottom, a surface layer, a water absorbing layer, an acetone solvent layer (2), and a pH indicator composition layer (3); a first isolation layer that can be pulled out is bonded between the acetone solvent layer (2) and the water absorbing layer, and a pull rod (4) for pulling out is provided at the end of the first isolation layer; a second isolation layer that can be pulled out is bonded between the solvent layer (2) and the pH indicator composition layer (3), and a pull ring (5) for pulling out is provided at the end of the second isolation layer; the two ends of the protective pad body (1) are upper and lower split structures, and the pull rod (4) and the pull ring (5) are respectively arranged in the middle of the split structures at the two ends of the protective pad body (1).

2. The pad for amniotic fluid detection according to claim 1, characterized in that: The acetone solvent layer (2) is a waterproof structure, and an acetone solvent with an acetone content of more than 90% is provided inside the layer.

3. The pad for amniotic fluid detection according to claim 1, characterized in that: The pH indicator composition layer (3) contains a pH indicator composition, which comprises a polymer, a plasticizer, a surfactant, an acid, an ion balance agent and a nitrazine yellow indicator.

4. The pad for amniotic fluid detection according to claim 1, characterized in that: The side surface of the pH indicator composition layer (3) is a transparent layer.

5. A method for using the pad for amniotic fluid testing according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. The parturient wears the pad for amniotic fluid detection to collect the liquid to be detected, and the liquid is concentrated and stored in the absorbent layer; S2. When the collected liquid needs to be tested for amniotic fluid, the second isolation layer is separated from between the solvent layer (2) and the pH indicator composition layer (3) by pulling the pull ring (5), and the acetone solvent in the solvent layer (2) and the pH indicator composition in the pH indicator composition layer (3) are mutually integrated to form a pH detection indicator, and color is developed on the pH indicator composition layer (3); S3. When the fused acetone solvent and pH indicator composition develop color on the pH indicator composition layer (3); pull the pull rod (4) to separate the first isolation layer from the solvent layer (2) and the water absorption layer, and the liquid in the water absorption layer penetrates into the pH indicator composition layer (3) and fuses with the pH detection indicator; and judge the state of the amniotic fluid based on the color change of the pH indicator composition layer (3).

6. The method of use according to claim 5, characterized in that: The pH detection indicator on the pH indicator composition layer (3) is yellow in color. If the collected liquid is fused with the pH detection indicator and then becomes blue in color, it is determined that amniotic fluid is present.

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