Sample collection and detection device and method

Abstract

A sample collection and detection device includes a collection cavity. The device further includes a sample collector. The sample collector comprises a collection rod and an absorption element, and the absorption element has a hollow cavity. A part of the collection rod is received in the hollow cavity of the absorption element. A first lug for blocking and locating the absorption element is arranged on the collection rod. Also provided is a method for collecting and detecting sample using the sample collection and detection device.

Claims

1. A sample collection and detection device, comprising: a collection cavity; a sample collector, comprising a collection rod and an absorption element, wherein the absorption element is provided with a hollow cavity, a part of the collection rod is accommodated in the hollow cavity of the absorption element, a first lug for blocking and locating the absorption element is arranged on the collection rod, an end part of one end of the collection rod connected with the absorption element is provided with engaging teeth, the engaging teeth protrude from a surface of the connecting rod, and the end part of one end of the collection rod connected with the absorption element is provided with a groove; a gasket, having a through hole, wherein the through hole passes through the collection rod to connect the gasket to the collection rod, and the absorption element is located between the gasket and the first lug; and an extrusion cylinder, fixedly connected in the collection cavity, wherein a cylinder opening of the extrusion cylinder is provided with a cylinder opening platform, a height of the extrusion cylinder is greater than or equal to a length of the absorption element, an inner diameter of the extrusion cylinder is greater than or equal to a diameter of the collection rod, and a diameter of the gasket is greater than the inner diameter of the extrusion cylinder, wherein the sample collector is inserted into the collection cavity, at first, the absorption element on the sample collector is located directly above the extrusion cylinder; secondly, the sample collector continues to move in a direction of insertion into the extrusion cylinder, the collection rod located in the hollow cavity of the absorption element enters the extrusion cylinder, the gasket at a bottom portion of the absorption element is blocked and extruded by the cylinder opening platform of the extrusion cylinder, the absorption element is compressed after being extruded by the cylinder opening platform and the gasket, and liquid flows onto the cylinder opening platform and a side wall of the extrusion cylinder after being extruded out from the absorption element and finally, the absorption element of the sample collector is entirely compressed, and all liquid in the absorption element flows into the collection cavity along the cylinder opening platform and the side wall of the extrusion cylinder.

2. The sample collection and detection device according to claim 1, wherein when the collection rod enters the extrusion cylinder, the engaging teeth on the end part of the collection rod enter the extrusion cylinder at first and are extruded by an inner side wall of the extrusion cylinder, and the end part of the collection rod deforms toward the groove, so that the end part of the collection rod enters the extrusion cylinder; and accordingly, the collection rod enters the extrusion cylinder.

3. The sample collection and detection device according to claim 2, wherein after the absorption element is fully compressed, the collection rod is fixed in the extrusion cylinder by the engaging teeth.

4. The sample collection and detection device according to claim 1, further comprising an engaging cover for receiving and fixing the sample collector, and the engaging cover is fixed at a cavity opening of the collection cavity.

5. The sample collection and detection device according to claim 4, wherein the engaging cover has an opening for receiving the sample collector, and a position of the opening corresponds to a position of the extrusion cylinder; and the sample collector is located directly above the cylinder opening of the extrusion cylinder after inserting in the opening of the engaging cover.

6. The sample collection and detection device according to claim 4, wherein an inner wall of the engaging cover is provided with an annular projection; the collection rod is provided with a second lug, and the second lug is located between the other end of the collection rod and the first lug; and when the second lug reaches the annular projection, the sample collector is prevented from continuing to enter the collection cavity.

7. The sample collection and detection device according to claim 1, further comprising a detection cavity, wherein the detection cavity is in liquid communication with the collection cavity.

8. The sample collection and detection device according to claim 7, wherein a side wall of one side of the extrusion cylinder close to the detection cavity is provided with a flow guide slope.

9. The sample collection and detection device according to claim 7, further comprising a test element, wherein the test element is located in the detection cavity.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG.1 is a schematic diagram of a collector of the present invention;

(2) FIG.2 is a decomposed schematic diagram of the collector of the present invention;

(3) FIG.3 is a sectional schematic diagram of the collector of the present invention;

(4) FIG.4 is a schematic diagram of the collector of the present invention after an absorption element is compressed;

(5) FIG.5 is a sectional schematic diagram of the collector of the present invention after the absorption element is compressed;

(6) FIG.6 is a schematic diagram of a collection and detection device of the present invention;

(7) FIG.7 is a decomposed schematic diagram of the collection and detection device of the present invention;

(8) FIG.8 is a sectional schematic diagram of a collection cavity of the collection and detection device of the present invention; and

(9) FIG.9 is a sectional schematic diagram of the collection and detection device of the present invention after a sample is collected.

REFERENCE SIGNS

(10) Sample collector 100, collection rod 110, absorption element 120, hollow cavity 121 of the absorption element, gasket 130, gasket through hole 131, first lug 111, second lug 112, handle (top end of the collection rod) 113, tail end 114 of the collection rod, tail end groove 115, tail end clamping tooth 116, device 800 for collecting and detecting samples, collection cavity 200, extrusion cylinder 210, cylinder opening platform 211, flow guide rope 212, engaging cover 300, opening 310 of the engaging cover, the inner projection 320 of the engaging cover, detection cavity 400, test element 500.

Description of the Embodiments

(11) The structure involved in the present invention or the technical terms used therein will be further described below.

(12) Detection

(13) Detection indicates to check or test whether a substance or material exists, such as, but not limited to, chemical substances, organic compounds, inorganic compounds, metabolites, drugs or drug metabolites, organic tissues or metabolites of organic tissues, nucleic acids, protein or polymers. In addition, the detection indicates to test the amount of the substance or material. Further, the detection further indicates immunodetection, chemical detection, enzyme detection, and the like.

(14) Sample

(15) The samples involved in the present invention refer to those substances which can be used for detecting, checking or diagnosing whether an analyte of interest exists. The sample can be, for example, a liquid sample, the liquid sample can include blood, plasma, serum, urine, saliva and various exudates, and can also include a liquid solution formed by pre-treating a solid sample and a semi-solid sample. The collected sample can be used for detecting whether the analyte exists by using the immunodetection, chemical detection, enzyme detection and other methods. In a preferred embodiment, the sample of the present invention is a saliva sample.

(16) Analyte

(17) Any analyte can be analyzed by using the device and method of the present invention. The analyte can be detected in any liquid or liquid sample, such as urine, saliva, saliva, blood, plasma, or serum.

(18) The analyte can also be some hapten substances, including drugs (such as drugs of abuse). “Drugs of Abuse” (DOA) refers to the use of drugs in non-medical destinations (usually playing the role of paralysis). The device can also be used for detecting tests that are medically useful but are easily overdose, such as tricyclic antidepressants (imipramine or analogues) and acetaminophen. These drugs are decomposed into different small molecules after being absorbed by the human body, but these small molecules exist in body fluid, such as blood, urine, saliva, sweat or the like, or the small molecules exist in a part of the body fluid.

(19) Test Element 500

(20) A test element 500 can be a laterally flowing test paper strip that can detect a plurality of analytes. Of course, other suitable test elements can also be utilized in the present invention. Various test elements can be combined to be used in the present invention. One form is test paper. The test paper for analyzing the analyte (such as drugs or metabolites indicating physical conditions) in the sample can be in various forms, for example, in the form of immunoassay or chemical assays. The test paper can adopt an analysis mode of a non-competitive method or a competitive method. The test paper contains a water absorbing material having a sample receiving area, a reagent area and a test area. The sample is added to the sample receiving area and flows to the reagent area via the capillary action. In the reagent area, if the analyte exists, the sample is combined with the reagent. Then, the sample continues to flow to the detection area. Some other reagents, such as molecules that are specifically bound to the analyte, are immobilized in the detection area. These reagents react with the analyte (if present) in the sample and bind the analyte to the area, or bind with a certain reagent in the reagent area. A marker for displaying a detection signal exists in the reagent area or in a separate marking area.

(21) A typical non-competitive method analysis mode is that, if the sample contains the analyte, the signal is generated, and if the sample contains no analyte, no signal is generated. In the competitive method, if the analyte does not exist in the sample, the signal is generated, and if the analyte exists, no signal is generated.

(22) The test element 500 is test paper, which can be made of a material that absorbs water or does not absorb water. The test paper can include a variety of materials for liquid sample transfer. The material of one piece of test paper can be covered on another material, for example, a piece of filter paper is covered on a nitrocellulose membrane. One area of the test paper can be made of one or more materials, and the other area is made of one or more other materials. The test paper can be adhered to a certain supporting object or a hard surface for improving the strength of gripping the test paper. The analyte is detected by a signal generating system, for example, a composition of one or more signal generating systems is fixed in an analyte detection area of the test paper by using one or more enzymes that specifically react with the analyte, and using one or more methods of fixing the specific composition on the test paper. The substance generating the signal can be on the sample receiving area 201, the reagent area, or the detection area, or the entire test paper, and one or more materials of the test paper can be filled with the substance. A solution containing the signal substance is added to the surface of the test paper or one or more materials of the test paper are immersed in the solution containing the signal substance. The test paper with the added solution containing the signal substance is dried.

(23) The various areas of the test paper can be arranged in the following manner. The sample receiving area, the reagent area, the detection area and a control area, an area determining whether the sample is adulterated, and a liquid sample absorption area. The control area is located behind the detection area. All areas can be arranged on a piece of test paper using only one material. Different areas can also be made of different materials. The areas can be in direct contact with the liquid sample, or different areas can be arranged according to a flow direction of the liquid sample, the tail end of each is connected and overlapped with the front end of the other area. The used material can be a material with good water absorption such as filter paper, a glass fiber or nitrocellulose membrane. The test paper can also take other forms

(24) Detection Cavity 400

(25) A detection cavity 400 is typically a cavity for accommodating the test element 500 and enabling the liquid sample to enter the cavity to contact with the test element for detection. The shape thereof is varied and can be designed according to the shape and the number of the test elements that need to be accommodated. In the present invention, the test element is a test strip, therefore, in one embodiment, the detection cavity is of a plate structure having a bottom plate and an upper plate, the bottom plate and the upper plate are combined together in a clamping manner to form a cavity, more specifically, the bottom plate is provided with one or more protruding strip-shaped necks, and these necks are used for placing and fixing the test strip 500. In some other preferred embodiments, the upper plate is provided with a window, and a position of the window corresponds to the detection area of the test strip, so that the test result of the test strip can be conveniently observed.

(26) In the following detailed description, reference characters carried in the drawings are a part of the description, which is illustrated by way of illustration of a particular specific solution of the present invention. It is not excluded that the present invention can also be practiced by other specific solutions and the structure of the present invention is changed without departing from the application range of the present invention.

(27) In the present invention, as shown in FIG.1 and FIG.2, a sample collector 100 includes an absorption element 120 and a collection rod 110, the absorption element 120 is provided with a hollow cavity 121, and a part of the collection rod 110 is accommodated in the hollow cavity 121 of the absorption element. For example, one end of the collection rod 110 is accommodated in the hollow cavity 121 of the absorption element, so that the collection rod 110 is connected with the absorption element 120. In a specific embodiment, the collection rod 110 has two ends, a top end 113 and a tail end 114, and the absorption element 120 is connected to the tail end 114 of the collection rod 110. More specifically, in order to ensure a tighter connection between the absorption element 120 and the collection rod 110, the structure and the size of the hollow cavity 121 of the absorption element are the same as the structure and the size of the part of the collection rod 120 inserted into the hollow cavity. The absorption element 120 is typically made of a medical grade sponge or foam material commonly used in the art. However, many other materials can also be made into the absorption element 120, such as cotton or paper, or any other material having water absorbing properties. The collection rod 110 is generally rigid, which is conducive to operating the absorption element 120. The collection rod 110 can be made of materials commonly used in the art, such as plastic, wood, metal or cardboard. The shapes of the absorption element 120 and the collection rod 110 are not limited, for example, the absorption element 120 can be spherical, elongated, cylindrical or the like, and the collection rod 110 can be cylindrical, rectangular, conical or the like. In some specific embodiments, the collection rod 110 and the absorption element 120 are both of cylindrical structures, and the hollow cavity 121 of the absorption element is also a cylindrical hollow cavity.

(28) In order to define a position of the absorption element 120 connected to the collection rod 110, the collection rod 110 is provided with a first lug 111. The first lug 111 is fixed to the collection rod 110 for blocking the absorption element 120 from further moving to the top end of the collection rod on the collection rod 110. Generally, a position of the first lug 111 on the collection rod 110 corresponds to a length of the absorption element 120. Specifically, a distance between the first lug 111 and the tail end 114 of the collection rod is equal to or slightly greater than the length of the absorption element 120. That is, after the tail end 114 of the collection rod is inserted into the hollow cavity 121 of the absorption element, the absorption element 120 moves along the tail end 114 of the collection rod toward a direction of the top end on the collection rod 110 and is blocked after reaching the first lug 111, at this time, the absorption element 120 is completely located on the collection rod 110, and the tail end 114 of the collection rod is just located at an edge of a bottom portion of the absorption element 120 (the tail end 114 slightly protrudes from the edge of the bottom portion of the absorption element 120). A gasket 130 is installed on the tail end 114 of the collection rod and is adjacent to or in contact with the edge of the bottom portion of the absorption element 120, in a preferred embodiment, the gasket 130 is in contact with the edge of the bottom portion of the absorption element 120. At this time, the absorption element 120 is defined between the first lug 111 of the collection rod 110 and the gasket 130. More specifically, a top portion of the absorption element 120 is in contact with the first lug 111, and the bottom portion of the absorption element 120 is in contact with the gasket 130. The gasket 130 is provided with a through hole 131, and the tail end 114 of the collection rod passes through the through hole to connect the gasket 130 to the collection rod 110. Specifically, a pore size of the through hole 131 is the same as an outer diameter of the collection rod 110. That is to say, a gap between the through hole 131 and the collection rod 110 is zero, the gasket 130 does not slide on the collection rod 110, and can only move up and down on the collection rod 110 under an action of an external force. The material of the gasket 130 usually requires certain rigidity, the gasket can be made of materials commonly used in the art, such as plastic, wood, metal or cardboard. In a specific embodiment, the gasket 130 is of a circular structure.

(29) In some embodiments, in order to prevent the absorption element 120 and the gasket 130 from slipping off from the collection rod 110, an end part of the tail end 114 of the collection rod is provided with engaging teeth 116, as shown in FIG.4, the engaging teeth 116 protrude from a surface of the collection rod 100. In this way, the gasket 130 and the absorption element 120 are located on the engaging teeth. In a specific embodiment, one or more engaging teeth 116 can be provided and are distributed on the end part of the tail end 114 of the collection rod, and in one embodiment, two engaging teeth 116 are symmetrically distributed on a side wall of the end part of the tail end 114 of the collection rod. The shape of the engaging teeth 116 preferably selected in such a way that the components can be conveniently installed on the collection rod, and in some embodiments, the engaging teeth 116 are of barb-shaped structures. In some other embodiments, in order to conveniently install the components on the collection rod 110, the inserted end of the collection rod 110, that is, the tail end of the collection rod, can generate telescopic deformation, particularly, when the tail end is provided with the engaging teeth, the deformation is more advantageous, a groove 115 is formed in the tail end of the collection rod, as shown in FIG.3, when an external force is applied to the tail end, the tail end deforms toward an interior of the groove 116, therefore the entire volume of the tail end 114 becomes smaller, so that the collection rod 110 can be conveniently inserted into the absorption element 120 and the gasket 130. In a specific embodiment, the engaging teeth 116 are symmetrically located on two side walls of the groove 115 in the tail end, as shown in FIG.5.

(30) Generally, the collection rod is further provided with a second lug 112, the second lug 112 is generally combined with the sample collection device for fixing the collector 100, and the second lug 112 is located between the top end of the collection rod and the first lug 111. In some embodiment, the size of the second lug 112 is greater than that of the first lug 111. In this way, when the sample collector 100 enters the collection device 800 to collect the sample, it can be ensured that the first lug 111 enters the collection device and is blocked by the second lug 112. In some embodiments, the top end of the collection rod is provided with a handle 113 for the convenient griping of the operator.

(31) In the present invention, the sample collection and detection device 800 capable of accommodating the sample collector of the present invention includes a collection cavity 200 and a sample collector 100, and as shown in FIG. 6, a detection cavity 400 is further disposed on one side in the collection cavity 200. An extrusion cylinder 210 is further disposed in the collection cavity 200, the extrusion cylinder 210 is fixed in the collection cavity 200, as shown in FIG. 8, in a specific embodiment, the extrusion cylinder 210 is located on one side in the collection cavity 200, and a cylinder opening platform 211 of the extrusion cylinder is connected to an inner side wall of the collection cavity 200. An annular platform is formed around a cylinder opening. The collection cavity 200 is typically a cavity for accommodating the liquid sample, and capable of accommodating the test element and a structure for mounting the test element or the like. In some embodiments, a structure for causing the sample to flow into the collection cavity is further disposed in the collection cavity. Or, the collection cavity is further provided with a passage in fluid communication with the test element. The shape thereof is varied and can be designed according to functions needing to be achieved. In the embodiment of the present invention, as shown in FIG. 6 and FIG. 7, the collection cavity 200 is formed by enclosing a side wall plane on one surface and arc-shaped side walls on the rest surfaces on a bottom wall. The detection cavity 400 is further disposed on the other side in the collection cavity 200, and the test element 500 is installed in the detection cavity 400. A side wall of one side of the extrusion cylinder 210 close to the detection cavity 400 is provided with a flow guide slope 212 for quickly guiding liquid on the side wall to flow to the detection cavity 400. The extrusion cylinder 210 is used for cooperating with the collector 100 to collect the sample in the absorption element, and the extrusion cylinder 210 is used for accommodating the collection rod 110 in the hollow cavity 121 of the absorption element to prevent the absorption element 120 from entering, therefore, the height of the extrusion cylinder 210 is greater than or equal to the length of the absorption element 120 to ensure that a part of collection rod accommodated by the absorption element is accommodated. An inner diameter of the extrusion cylinder 210 is greater than or equal to a diameter of the collection rod 110 to ensure that the collection rod 110 can be inserted into the extrusion cylinder 210. At the same time, a diameter of the gasket 130 is greater than the inner diameter of the extrusion cylinder 210, so that the gasket 130 is blocked at an outside of the extrusion cylinder 210 and becomes a hard bottom for extruding the absorption element 120, and accordingly, the absorption element 120 can be compressed more easily.

(32) The device 800 further includes an engaging cover 300 for receiving and fixing the sample collector, as shown in FIG.7 and FIG.8, the engaging cover 300 covers the cavity opening of the collection cavity 200 for sealing the same, specifically, the engaging cover 300 is buckled at the cavity opening of the collection cavity 200 to fix the collection cavity with the engaging cover, specifically, the engaging cover is provided with a neck for accommodating the cavity opening of the collection cavity 200, and the neck is buckled on a side wall of the cavity opening. The engaging cover 300 is provided with an opening 310, and a position of the opening 310 corresponds to a position of the extrusion cylinder 210 in the collection cavity, that is, a center of the opening 310 is overlapped with a center of the extrusion cylinder 210. When the collector 100 enters the collection cavity 200 through the opening 310 of the engaging cover, the absorption element 120 at a bottom portion of the collector is located directly above the cylinder opening of the collection cylinder 210. The engaging cover 300 is provided an annular projection 320, and the annular projection 320 protrudes toward an interior of the engaging cover 300. The projection 320 blocks the second lug 112 on the collector, so that the collector 100 cannot continue to enter the collection cavity 200 or the extrusion cylinder 210.

(33) A sample collection and detection method will be specifically described below with respect to the sample collector 100 and the sample collection and detection device 800 of the present invention in conjunction with FIG.9. Details are as follows.

(34) The sample collector 100 is installed, the hollow cavity 121 of the absorption element 120 is inserted into the collection rod 110 by aligning with the tail end 114 of the collection rod having the engaging teeth 116 and the groove 115, until the absorption element 120 reaches the first lug 111. The through hole 131 of the gasket 130 is inserted into the collection rod 110 by aligning the tail end 114 of the collection rod, and the gasket 130 is located at the engaging teeth 116.

(35) The sample collector 100 is placed in the oral cavity of a subject (or liquid to be sampled) to collect the sample, and the absorption element 120 is filled with the sample.

(36) The collector 100 filled with the liquid sample is inserted into the opening 310 of the engaging cover 300 on the collection cavity 200, and the absorption element 120 on the collector is located directly above the cylinder opening of the extrusion cylinder 210.

(37) The collector 100 continues to move in the direction of insertion into the extrusion cylinder 210, the collection rod 110 located in the hollow cavity of the absorption element enters the extrusion cylinder 210, that is, the engaging teeth 116 at the tail end of the collection rod enter the extrusion cylinder 210 to be extruded by an inner side wall of the extrusion cylinder 210, so that the tail end 114 of the collection rod deforms toward the groove 115, then tail end 114 of the collection rod enters the extrusion cylinder 210, and accordingly, the collection rod 100 enters the extrusion cylinder 210.

(38) Meanwhile, the gasket 130 at the bottom portion of the absorption element is blocked and extruded by the cylinder opening platform 211 of the extrusion cylinder 210, the absorption element 120 is compressed after being extruded by the cylinder opening platform 211 and the gasket 130, and the liquid flows onto the cylinder opening platform 211 and the side wall of the extrusion cylinder 210 after being extruded out from the absorption element 120.

(39) When the second lug 112 reaches the annular projection 320, the absorption element 120 of the collector is fully compressed, and all liquid in the absorption element 120 flows into the collection cavity 200 along the cylinder opening platform 211 and the side wall of the extrusion cylinder 210.

(40) At the same time, the tail end 114 of the collection rod reaches the bottom portion of the extrusion cylinder 210, the collection rod 110 is fixed in the extrusion cylinder 210 by the engaging teeth 116, and the collector 100 is prevented from continuing to enter the collection cavity 200, as shown in FIG.9.

(41) The sample flowing to the cylinder opening platform 211 and the side wall of the extrusion cylinder 210 flows into the collection cavity 200 in a vicinity of the detection cavity 400 along the flow guide slope 212, and then flows into the detection cavity 400 to contact with the detection cavity 400 for detection.

(42) A detection result on the test element is read.