CN215078636U - Whole blood detection device - Google Patents

Abstract

The utility model relates to a whole blood detection device, which comprises a blood sampling structure and a detection cavity, wherein the detection cavity is connected with the blood sampling structure and is communicated with liquid; the blood collection structure comprises a collection rod, wherein a capillary channel is arranged in the collection rod, the bottom end of the capillary channel is positioned at the tail end of the collection rod, and the top end of the capillary channel is positioned in the middle of the collection rod; the collecting rod is provided with a through hole which is connected and communicated with the top end of the capillary channel. The whole blood detection device realizes the collection, slow release and detection functions of a blood sample through the integrated structure of the blood collection structure, the detection cavity and the buffer cavity. The operation is easy, and the use difficulty of an operator is reduced. The number of times and time for an operator to contact a sample are effectively reduced, the probability of infection of the operator is reduced, the safety of the operator is ensured, and the method is particularly suitable for HIV detection, new coronavirus detection and the like. The detection device has small requirements on the collection amount of the sample, and the collection amount is optimized from milliliter level to micro-upgrade.

Description

Whole blood detection device

Technical Field

The utility model relates to a whole blood detection device and method, in particular to be used for collecting the whole blood sample or behind the fingertip study sample, make blood sampling structure and whole blood detection device and method that detect again behind the sample mixed buffer solution.

Background

The following background is provided to aid the reader in understanding the present invention and is not admitted to be prior art.

The technology of detecting whether an analyte exists in a sample by using the principle of an immunological binding reaction is widely used in various fields. It can be used to detect analytes in various biological samples (saliva, blood, urine, serum, sweat, etc.) to monitor diseases and human health (early pregnancy, tumors, infectious diseases, drugs, etc.). The underlying principle of such detection techniques is to establish the ability to specifically bind between immune molecules, such as antibodies and antigens, haptens/antibodies, biotin and avidin, and the like.

The immunochromatography technology is applied to blood as a sample for detecting diseases, and a plurality of different diagnostic reagents are developed and applied to different disease detection fields, for example: detection of tumor markers, early prognosis of cardiovascular diseases, screening and detection of infectious diseases, and the like. Blood is used as a more common sample source, particularly fingertip blood, and is widely adopted by various platforms due to minimal invasion and rapidness of blood collection.

In the field of medical diagnosis, it is a common method to collect a test liquid sample using a test device or a test cup and determine whether the liquid sample contains an analyte. Such test devices or test cups typically require the sample to be collected in a sample container, and the associated technician includes a test strip and immerses a portion of the test strip in the sample, removes the test strip after a period of time, and reads the test results.

In the prior art patent application No. cn201410150547.x, a disposable storage container having a closed end and an open end is disclosed for collecting and storing a sample, and then inserting the sample into a sample adding hole of a detection plate for sample adding to perform detection. In this patent application, the structure of gathering blood and the structure of detecting the sample are split type design.

However, the existing detection device has the following problems:

1. most of detection devices are of split structures and are operated in a split mode. The operating requirements are relatively high and there are situations where the blood sample is contaminated or the blood sample contaminates the operator.

2. The detection device is not small enough in structure and inconvenient to carry.

SUMMERY OF THE UTILITY MODEL

The utility model provides a whole blood detection device of integral structure makes the collection and the detection of blood sample can realize the integration, reduces the product structure and reduces the person's of being examined the operation degree of difficulty to, as far as possible few let the operator contact the sample, reduce the infection probability, improve operator safety guarantee. In addition, the blood sampling structure and the whole blood detection device are used for detection, so that samples can be fully utilized for detection, the demand of the samples is greatly reduced, and the success of the detection is facilitated.

Specifically, the whole blood detection device provided by the utility model comprises a blood sampling structure and a detection cavity, wherein the detection cavity is connected with the blood sampling structure and is communicated with liquid; the blood collection structure comprises a collection rod, wherein a capillary channel is arranged in the collection rod, the bottom end of the capillary channel is positioned at the tail end of the collection rod, and the top end of the capillary channel is positioned in the middle of the collection rod; the collecting rod is provided with a through hole which is connected and communicated with the top end of the capillary channel.

In some preferred embodiments, the collecting rod is provided with a groove on the outer surface, the groove is positioned between the through hole and the top end of the collecting rod, and one end of the groove is communicated with the through hole.

In some preferred embodiments, the top end of the collecting rod is provided with a barb, and the bottom of a hook groove of the barb is provided with a through hole; the other end of the groove is connected with the barb and communicated with the through hole; the capillary channel, the through hole, the groove and the hook groove and the through hole of the barb on the collecting rod form a liquid circulation channel.

In some preferred embodiments, the inner wall of the detection cavity is provided with a first step, and the open end of the barb is clamped with the first step to connect the detection cavity with the blood sampling structure.

In some preferred embodiments, the collection rod ends are tapered.

In some preferred embodiments, a plurality of ribs protruding from the collecting rod are arranged between the tail end of the collecting rod and the annular disc.

In some embodiments, the ribs are of right triangle configuration.

In some preferred embodiments, the collecting rod is provided with an annular disc, an annular gasket sleeved on the collecting rod and an annular gasket sleeved on the collecting rod; the bottom of the detection cavity is sealed with the annular disc through an annular gasket.

In some preferred embodiments, the inner wall of the detection cavity is further provided with a second step positioned above the first step; the whole blood detection device also comprises a buffer pad; the cushion is located on the second step.

In some preferred embodiments, the collection rod tip is inserted into the detection chamber from the bottom of the detection chamber, the distal end of the barb enters the detection chamber, and then the open end of the barb is compressed, and the collection rod tip and barb enter the detection chamber; after the opening end of the barb reaches the first step, the opening end of the barb rebounds to the original shape due to the fact that the inner diameter of the detection cavity is increased, and the barb is clamped at the first step; at the moment, the bottom of the detection cavity forms a seal with the annular disc through the annular gasket.

In some preferred embodiments, the whole blood testing device further comprises a test element positioned within the testing chamber and a cover that covers and seals the testing chamber.

In some preferred embodiments, the test element is located between the bumper pad and the cover.

In some preferred embodiments, fluid entering the detection chamber through the collection rod flows into the buffer pad and then from the buffer pad onto the test element located in the detection chamber. The buffer pad serves to prevent the wash liquid from the absorbent member from rushing too vigorously, rushing into the detection chamber in large amounts, and to cushion the test element located in the detection chamber.

In some preferred embodiments, the apparatus further comprises a carrier having a recess. The test element is a test strip, and the test strip is inserted into the concave hole of the bracket to be fixed. In some embodiments, one end of the bracket is fixed with the cover.

In some preferred embodiments, the liquid removal device further comprises a buffer cavity, a sealing sheet for sealing the buffer cavity and a liquid removal cavity; the bottom of the liquid transferring cavity is hermetically connected with the buffer cavity; the buffer liquid is sealed in the buffer cavity.

In some preferred embodiments, the pipetting chamber has an upper large chamber and a lower small chamber; the bottom of the small cavity is hermetically connected with the buffer cavity.

In some embodiments, the sealing sheet is an aluminum foil sheet.

In some preferred embodiments, the outer wall of the bottom of the detection chamber is provided with a sealing gasket, the blood sampling structure and the detection chamber enter the pipetting chamber, and the detection chamber and the pipetting chamber are sealed through the sealing gasket.

In some preferred embodiments, first, the blood sampling structure connected to the detection cavity is inserted into the liquid transfer cavity, and the end of the collecting rod of the blood sampling structure is positioned right above the orifice of the liquid transfer cavity; secondly, the blood sampling structure continues to move along the direction of inserting into the liquid transferring cavity, the tail end of the collecting rod contacts with the sealing sheet, namely the tail end of the collecting rod reaches the top of the buffer cavity; thirdly, the blood sampling structure continues to move along the direction of being inserted into the liquid transferring cavity, the tail end of the collecting rod pierces the sealing sheet, the collecting rod enters the buffer cavity, and part of buffer solution is mixed with part of sample in the capillary channel of the collecting rod; fourthly, the blood sampling structure continues to move along the direction of being inserted into the liquid transferring cavity, and the sealing gasket on the outer wall of the detection cavity and the small cavity on the lower part of the liquid transferring cavity form sealing; and finally, the blood sampling structure continues to move along the direction of inserting into the liquid transferring cavity, the sealed cavity space formed by the small cavity and the buffer cavity is compressed, the pressure in the cavity is increased, the buffer liquid is flushed into the capillary channel to be mixed with the sample, and the mixed liquid flows into the detection cavity through the capillary channel, the through hole, the groove and the through hole of the groove and the barb on the collecting rod.

In some preferred embodiments, the detection chamber is transparent or provided with a transparent window.

In some preferred embodiments, the test element may be one or more. The plurality of test elements may each detect a different analyte in the sample.

In some preferred embodiments, the buffer chamber is in threaded connection with the pipetting chamber.

In some preferred embodiments, the buffer pad is in contact with the test element.

In some preferred embodiments, the cap is screwed onto the cap and seals the detection chamber.

On the other hand, the utility model also provides a method for collecting and detecting blood samples, including the whole blood detection device, the detection device includes a detection cavity and a blood sampling structure, the inner wall of the detection cavity is provided with a first ladder, the blood sampling structure includes a collecting rod, the top end of the collecting rod is provided with a barb, and the detection cavity is connected with the blood sampling structure by the barb clamping the first ladder; a capillary channel is arranged in the acquisition rod, the bottom end of the capillary channel is positioned at the tail end of the acquisition rod, and the top end of the capillary channel is positioned in the middle of the acquisition rod; the top ends of the collecting rod and the capillary channel are provided with through holes; the outer surface of the collecting rod is provided with a groove, the groove is positioned between the through hole and the top end of the collecting rod, and one end of the groove is communicated with the through hole; the other end of the groove is connected and communicated with the barb; the whole blood detection device also comprises a buffer cavity, a sealing sheet for sealing the buffer cavity and a liquid transferring cavity; the bottom of the liquid transferring cavity is hermetically connected with the buffer cavity; the buffer solution is sealed in the buffer cavity; wherein:

collecting a sample by the blood collecting structure, and filling the capillary channel with a blood sample;

inserting a blood sampling structure filled with a blood sample and a detection cavity connected with the blood sampling structure into a liquid transferring cavity;

the blood sampling structure moves in the liquid transferring cavity along the direction inserted into the liquid transferring cavity, so that the blood sampling structure reaches the sealing sheet;

the blood sampling structure pierces the sealing sheet on the buffer cavity and enters the buffer cavity, so that the sample in the capillary channel is mixed with the buffer solution;

the mixed liquid flows into the test element in the detection cavity along the capillary channel, the through hole, the groove and the through hole of the barb on the acquisition rod for detection;

and reading the detection result on the test element.

In some preferred embodiments, the bottom of the hook groove of the barb is provided with a through hole; the other end of the groove is connected with the barb and communicated with the through hole; the mixed liquid flows into the detection cavity along a liquid circulation channel formed by the capillary channel, the through hole, the groove, the hook groove of the barb and the through hole on the acquisition rod.

In some preferred embodiments, the collection rod ends are tapered; the sealing piece is pierced by the end of the collection rod which is pointed and tapered.

In some preferred embodiments, the test device further comprises a cover for covering the detection chamber, and the test element is located in the detection chamber after the cover covers the detection chamber.

In some preferred embodiments, the inner wall of the detection cavity is further provided with a second step positioned above the first step; a buffer pad is arranged in the detection cavity; the buffer cushion is positioned on the second step; the mixed liquid flows into the detection chamber, then flows into the buffer pad, and then flows from the buffer pad onto the test element located in the detection chamber.

In some preferred embodiments, the outer wall of the bottom of the detection chamber is provided with a sealing gasket, the blood sampling structure and the detection chamber enter the pipetting chamber, and the detection chamber and the pipetting chamber are sealed through the sealing gasket.

In some preferred embodiments, the collecting rod is provided with an annular disc and an annular gasket sleeved on the collecting rod, and the bottom of the detection cavity is sealed with the annular disc through the annular gasket.

Advantageous effects

The utility model discloses a whole blood detection device realizes the collection of blood sample, slowly-releasing and detection function through the blood sampling structure with the integral type structure that detects chamber and cushion chamber. Firstly, the detection device is easy to operate, and the use difficulty of an operator is reduced. And secondly, the frequency and time of the operator contacting the sample are effectively reduced, the probability of the operator being infected is reduced, the safety of the operator is ensured, and the method is particularly suitable for HIV detection, new coronavirus detection and the like. Thirdly, the integrated detection device has small requirements on the collection amount of the sample, and the collection amount is optimized from milliliter level to micro-upgrade. Finally, due to the integrated structure, the acquisition, the slow release and the detection are realized in one step, and the success rate of the detection is improved.

Drawings

Fig. 1 is a schematic structural diagram of the whole blood testing device of the present invention.

Fig. 2 is an exploded schematic view of the whole blood testing device of the present invention.

Fig. 3 is a schematic view of the blood sampling structure of the present invention.

Fig. 4 is a schematic sectional view of the blood sampling structure and the detection chamber of the present invention.

Fig. 5 is a schematic sectional view of the blood sampling structure and the detection chamber of the present invention.

FIG. 6 is a cross-sectional view of the whole blood test apparatus according to the present invention before the start of use.

Fig. 7 is a cross-sectional view of the blood sampling structure of the whole blood testing device of the present invention reaching the buffer chamber.

Fig. 8 is a cross-sectional view of the whole blood testing device according to the present invention, wherein the blood sampling structure reaches the sample in the buffer chamber for buffering and testing.

Reference numerals

Whole blood detection device 100, blood collection structure 10, collection rod 11, capillary channel 111, through-hole 112, groove 113, barb 114, hook groove 115, through-hole 116, barb's open end 119, collection rod top 117, collection rod end 118, annular disc 120, annular gasket 121, rib 122, detection chamber 20, first ladder 21, second ladder 22, blotter 23, transfer chamber 30, large cavity 31, small cavity 32, buffer chamber 40, gasket 41, test element 50, sample receiving area 501, detection area 502, buffer solution 60, sealing sheet 70, sealing pad 80, lid 90, bracket 51, shrinkage pool 52

Detailed Description

The structures referred to in the present invention or these terms of art used are further described below.

Detection of

Detection refers to assaying or testing for the presence of a substance or material, such as, but not limited to, a chemical, organic compound, inorganic compound, metabolic product, drug or drug metabolite, organic tissue or a metabolite of organic tissue, nucleic acid, protein, or polymer. In addition, detection indicates the amount of the test substance or material. Further, the assay means immunodetection, chemical detection, enzyme detection, and the like.

Sample(s)

The term sample as used herein refers to a substance that can be used to detect, assay or diagnose the presence of an analyte of interest. The sample may be, for example, a liquid sample, which may include blood, plasma, serum, and may also include a liquid solution formed by pre-treating a solid sample and a semi-solid sample. The collected sample may be used for immunoassay, chemical assay, enzymatic assay, etc. to detect the presence of the analyte. In a preferred embodiment, the sample of the present invention is a blood sample.

Analyte substance

Any analyte can be analyzed using the device and method of the present invention. The analyte can be detected in any liquid or liquefied sample, such as blood, plasma, or serum.

The analyte may also be a hapten, which includes a drug of abuse (e.g., a drug of abuse). By "drug of abuse" (DOA) is meant the use of a drug (usually acting to paralyze nerves) at a non-medical destination. The device can also be used for detecting the detection which belongs to the medical application and is easy to take overdose, such as tricyclic antidepressant (imipramine or the like) and acetaminophen, etc. After being absorbed by human body, the medicines are decomposed into different small molecular substances, and the small molecular substances exist in body fluids such as blood, urine, saliva, sweat and the like or exist in partial body fluids. The device can also be used for detecting the antibody of the new coronavirus and the neutralizing antibody after the new coronavirus is beaten.

Test element 50

The test element 50 may be selected from a lateral flow test strip that detects a variety of analytes. Of course, other suitable test elements may be used with the present invention. Various test elements may be combined and used in the present invention. One form is a test strip. Test strips for the analysis of analytes, such as drugs or metabolites indicative of a physical condition, in a sample may be in various forms, such as immunoassay or chemical assay forms. The test strip may be used in a non-competitive or competitive assay format. The test strip includes a bibulous material having a sample receiving area, a reagent area, and a test area. The sample is applied to the sample receiving area and flows by capillary action to the reagent area. In the reagent zone, the sample binds to the reagent if the analyte is present. The sample then continues to flow to the detection zone. Other reagents, such as molecules that specifically bind to the analyte, are immobilized at the detection zone. These reagents react with the analyte (if present) in the sample and bind the analyte to the zone, or to one of the reagents of the reagent zone. The label for indicating the detection signal is present in the reagent zone or in a separate label zone.

Typical non-competitive assay formats are: if the sample contains the analyte, a signal is generated, and if the analyte is not contained, no signal is generated. In a competition method, a signal is generated if the analyte is not present in the sample and no signal is generated if the analyte is present.

The test element 50 may be a test strip, and may be selected from a material that absorbs or does not absorb water. The test strip may include a variety of materials for liquid sample delivery. One of the test strips may be coated with another material, such as a nitrocellulose membrane coated with filter paper. One region of the test strip may be selected from one or more materials and another region may be selected from a different one or more materials. The test strip may be adhered to some support or hard surface for improved strength when the test strip is held in place. The analyte is detected by a signal producing system, such as one or more enzymes that specifically react with the analyte, and one or more compositions of the signal producing system are immobilized on the analyte detection zone of the test strip by a method such as that described above for the immobilization of a specific binding substance on the test strip. The signal-producing substance may be on the sample-receiving zone 501, the reagent zone, or the detection zone, or the entire test strip, and the substance may be impregnated on one or more materials of the test strip. A solution containing the signal is applied to the surface of the strip or one or more materials of the strip are immersed in the solution containing the signal. The strip to which the solution containing the signal substance was added was dried.

The various regions of the test strip may be arranged as follows: a sample receiving area, a reagent area, a detection area, a control area, a sample adulteration area and a liquid sample absorption area. The control zone is located behind the detection zone. All zones may be arranged on a strip of test paper using only one material. It is also possible to use different materials for the different zones. The zones may be in direct contact with the liquid sample, or different zones may be arranged according to the direction of flow of the liquid sample, with the ends of each zone being contiguous with and overlapping the ends of the other zone. The material used can be a material with good water absorption such as filter paper, glass fiber or nitrocellulose membrane. The test strip may take other forms.

Detection chamber 20

The detection chamber 20 is generally a cavity for accommodating the test element 50 and allowing the liquid sample to enter the cavity 20 to contact the test element 50 for detection. The shape of the test element 50 may be varied and may be designed according to the shape and number of test elements to be accommodated. The utility model discloses in, the test element is test paper strip 50, and consequently, in one embodiment, detection chamber 20 is the tube structure, and test paper strip 20 is located this barrel. In other embodiments, the test chamber 20 is provided with a cover 90 for sealing the upper opening, and the test strip 50 is fixed on the cover 90 and thus is relatively fixed in the test chamber 20. In other preferred embodiments, the cartridge 20 has a window positioned to correspond to the test area of the test strip to facilitate viewing of the test results from the test strip. Or in other embodiments, the cylinder body is transparent, so that the test result of the test strip can be observed conveniently. In other embodiments, the test strip is fixed in the hollow cylinder of the detection chamber 20 by a bracket 51, and specifically, the bracket is provided with a concave hole 92, and the test strip is inserted into the concave hole.

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. We do not exclude that the invention can also be implemented with other embodiments and that the structure of the invention can be changed without violating the scope of the invention.

As shown in fig. 1-8, the blood sampling structure of the present invention includes a collecting rod 11, the collecting rod has a collecting rod top 117 and a collecting rod end 118 at its two ends, a capillary channel 111 is provided inside the collecting rod, the capillary channel does not penetrate the whole collecting rod, the bottom of the capillary channel is located at the collecting rod end 118, and the top of the capillary channel is located at the middle upper part of the collecting rod 11; the capillary channel 111 is used for collecting blood samples, and more preferably, is used for collecting whole blood samples in general. The collection rod 11 is further provided with a through hole 112 connected and communicated with the top of the capillary channel 111, and the through hole 112 transversely penetrates through the collection rod 11, so that the liquid in the capillary channel 111 can flow out of the collection rod 11 through the through hole 112. In some embodiments, the capillary passage has a diameter of between 0.1 and 2 mm. In a particular embodiment, the capillary passage has a diameter of between 0.1 and 1.7 mm. Further, the acquisition rod 11 is provided with a groove 113 on the outer surface thereof, the groove 113 is longitudinally provided on the outer surface of the acquisition rod 11 between the through-hole 112 and the acquisition rod tip 117, and one end of the groove 113 communicates with the through-hole 112, thereby communicating with the through-hole 112.

The top end 117 of the collecting rod is provided with a barb 114, as shown in fig. 3, the barb 114 is hollowed at the middle part to form a hook groove 115, when pressure is applied, the open end 119 of the barb 11,4 moves to the hollow hook groove 115, so that the outer peripheral surface of the whole barb 114 is reduced, a cavity with a certain volume is conveniently accessed, and when the pressure disappears, the open end 119 of the barb 114 returns to the original position. The hook bottom of the barb 114 has a through hole 116 larger than the hook groove 115; the other end of the groove 113 is connected to the barb 114 and communicates with the through hole 116. Therefore, the hook groove 115 not only allows the barb opening end 119 to be elastically deformed inward, but also allows the groove on the outer surface of the acquisition rod to be in fluid communication with the through hole at the end of the hook groove, so that the capillary channel 111, the through hole 112, the groove 113, the barb groove 115 and the through hole 116 of the acquisition rod 11 form a fluid communication channel. More specifically, the distal end of barb 116 is tapered to facilitate entry of the connecting end 117 of the collection rod into the cavity.

In one embodiment, collection rod end 118 is tapered. Thus, the pointed and tapered distal end of the collection rod is capable of piercing relatively thin sheet objects such as metal foils, e.g., aluminum foil, tin foil, etc., or paper sheets, plastic sheets, etc. Also, in one embodiment, collection rod tip 117 is tapered, which facilitates entry of collection rod tip 117 into the cavity.

In addition, the collection rod 11 is provided with a ring-shaped disc 120 and a ring-shaped gasket 121 sleeved on the collection rod, and the ring-shaped gasket is positioned between the ring-shaped disc 120 and the top end 117 of the collection rod. A plurality of ribs 122 protruding from the collection rod are provided between the collection rod end 118 and the annular disc 120. In some embodiments, the ribs 122 are in a right triangle structure, so that when the portion of the collecting rod below the annular disc 120 is located in the hollow cavity, the space of the hollow cavity can be occupied to a greater extent, and the space in the hollow cavity is squeezed to be smaller.

As shown in fig. 1-8, the whole blood testing device 100 of the present invention includes the aforementioned blood sampling structure 10, and further includes a testing chamber 20, and the testing chamber 20 and the blood sampling structure 10 are fixedly connected, specifically, the testing chamber 20 is a cylindrical structure, and the inner diameter of the cylindrical body has a step-type change, and is divided into three different inner diameters, from the bottom of the testing chamber 20 to the top, the inner diameter of the cylindrical body is gradually increased. Therefore, the inner wall of the detection cavity 20 is provided with a first step 21 and a second step 22, the top end 117 of the collection rod is inserted from the bottom of the detection cavity 20, the outer periphery of the barb 114 on the collection rod is larger than the inner periphery of the bottom of the detection cavity 20, the barb 114 is compressed, the open end is sunk into the cavity in the middle, so that the outer periphery of the barb 114 is adapted to the inner periphery of the bottom of the detection cavity, the top end 117 of the collection rod enters the detection cavity 20 until the whole barb 114 is located at the first step 21, the barb 114 is not compressed because the inner diameter of the first step 21 of the detection cavity 20 is enlarged, the open end 119 returns to the original position, so that the diameter of the whole barb 114 is larger than the inner diameter of the detection cavity 20 below the first step 21, therefore, the barb 114 is clamped at the first step 21, the collection rod 11 is fixedly connected with the detection cavity 20, and the blood collection structure 10 is also fixedly connected with the detection cavity 20. At this time, the bottom of the detection chamber 20 is sealed with the annular disc 120 by the annular gasket 121, so that the blood collection structure 10 is sealed with the detection chamber 20.

A cover 90 is disposed on the top of the detection chamber 20, and the cover 90 seals the detection chamber 20. In one embodiment, a cover 91 is threaded over the detection chamber 20. Meanwhile, in the present invention, the cover 90 is also used to fix the test element 50. In one embodiment, the test element 50 is a test strip. Specifically, the test strip may be multiple, and is used for different analyte detection. The cover 90 is provided with a locking groove for locking the end of the test strip 50, so that the test strip 50 is fixed on the cover 90. In other embodiments, as shown in FIG. 2, a bracket 91 is snapped into the top of the cover, and the bracket 91 is used to hold the test strip. More specifically, be equipped with strip shrinkage pool 91 on the bracket, the test paper strip is placed in the shrinkage pool internal fixation. Certainly, a plurality of strip-shaped concave holes can be formed in the bracket to fix a plurality of test strips. After the cover 90 covers the detection chamber 20, the test strip 50 is fixedly positioned in the detection chamber 20.

In order to allow a slow flow of liquid into the test element 50, i.e. the sample receiving area 501 of the test strip, and also to avoid excess liquid entering the detection chamber 20, the detection area 502 of the test element 50 (test strip) is also submerged, ensuring the validity of the detection, a buffer pad 23 is placed on the second step 22 above the first step 21. In some preferred embodiments, the end of the sample receiving area of the test element 50 is in zero-gap contact with the buffer pad 23, which ensures that the test element 50 absorbs enough liquid to ensure a successful detection.

The liquid in the capillary channel flows into the detection cavity 20 after flowing through the through holes and the grooves, the hook grooves and the through holes, then reaches the buffer pad 23 for buffering, and finally flows onto the test element 50 for detection.

The utility model discloses in, some samples need mix the slowly-releasing with buffer solution 60 before the detection, therefore, this sample collection and the device that detects still include cushion chamber 40, and this cushion chamber 40 internal storage has buffer solution 60 to and include the gasket 70 of sealing the buffer solution in the cushion chamber. And a pipetting chamber 30 sealingly connected to the buffer chamber, the pipetting chamber 30 being adapted to receive the absorbing member 12 and to transfer the buffer liquid 60 to the absorbing member 12 and the detection chamber 20. In one embodiment, the buffer chamber 40 is threadably connected to the pipetting chamber 30 to form a seal therebetween. Specifically, a gasket 41 is arranged on the top of the outer wall of the buffer chamber, and after the pipetting chamber 30 is screwed to the buffer chamber 30, the pipetting chamber and the buffer chamber are sealed by the gasket 41. In a specific embodiment, a clamping strip (not shown) is disposed in the liquid transferring cavity 30 for cooperating with a rib of the blood sampling structure, so that the blood sampling structure is relatively fixed in the liquid transferring cavity, and the blood sampling structure 10 is prevented from rotating greatly in the liquid transferring cavity 30 during the insertion process, thereby ensuring that the operation is performed more smoothly.

In some embodiments, the outer wall of the bottom of the detection chamber 20 is provided with a sealing gasket 80, the blood sampling structure 10 and the detection chamber 20 enter the pipetting chamber 30, and the pipetting chamber is sealed by the contact of the sealing gasket 80 and the inner wall of the pipetting chamber 30. In the present invention, considering that the amount of the blood sample is small (only the portion in the capillary channel), the amount of the buffer solution matched with the blood sample is also small, and in one embodiment, the cavity provided with the liquid transferring cavity 30 is a big-end-up structure, i.e. including a big cavity 31 at the upper part and a small cavity 32 at the lower part. When the sealing gasket 80 on the outer wall of the detection chamber contacts the small chamber 32 of the pipetting chamber, the small chamber 32 is sealed. Therefore, the volume of the sealed cavity formed by the small cavity and the buffer cavity is smaller, after the collection rod enters, the volume of the sealed cavity is occupied by the collection rod and ribs on the collection rod, the space is greatly extruded, and more blood samples and buffer solution can be extruded to flow into the detection cavity through the capillary channel, the groove, the hook groove and the channel, so that enough samples can be detected by the test element of the detection cavity.

When in use, the blood sampling structure 10 connected to the detection cavity 20 is inserted into the liquid transferring cavity 30, firstly, the tail end 118 of the collecting rod of the blood sampling structure is positioned right above the opening of the liquid transferring cavity 30; second, the lancing structure 10 continues to move in the direction of insertion into the chamber 30, and the distal end 118 of the collection rod contacts the sealing plate 70, i.e., the distal end 118 of the collection rod reaches the top of the buffer chamber 30; thirdly, the blood sampling structure 10 continues to move along the direction of inserting into the liquid transferring cavity 30, the tail end 118 of the collecting rod pierces the sealing sheet 70, the collecting rod 11 enters the buffer cavity 30, and when the buffer solution in the collecting rod contacts the tail end of the collecting rod, namely the buffer solution contacts the bottom end of the capillary channel, part of the sample at the bottom end of the capillary channel of the collecting rod is mixed with the buffer solution; fourthly, the blood sampling structure 10 continues to move along the direction of inserting into the liquid transferring cavity 30, and the sealing gasket 80 on the outer wall of the detection cavity 20 forms a seal with the small cavity 32 at the lower part of the liquid transferring cavity 30; finally, the blood sampling structure 10 continues to move along the direction of being inserted into the liquid transferring cavity 30, the sealed cavity space formed by the small cavity 32 and the buffer cavity 40 is gradually compressed because the collecting rod below the annular disc gradually enters, meanwhile, the pressure in the cavity gradually increases, the buffer liquid is flushed into the capillary channel to be mixed with the sample, and the mixed liquid flows into the detection cavity through the capillary channel, the through hole, the groove and the through hole of the groove and the barb on the collecting rod.

The method of the present invention for collecting and testing a liquid sample is described in detail below.

Firstly, the whole blood detecting device 100 seals the buffer solution 60 in the buffer cavity 40 in the production process, and the sealing sheet 70 is fixed at the opening of the buffer cavity 40; the pipetting chamber 30 is screwed on the buffer chamber 40, and the bottom of the pipetting chamber and the top of the buffer chamber are sealed by a gasket 41; the blood sampling structure 10 is connected to the first step 21 of the detection cavity 20 through the barb 114 at the top end 117 of the collection rod, so that the blood sampling structure 10 is fixed with the detection cavity 20, wherein the blood sampling structure is sealed with the bottom of the detection cavity 20 through an annular disc and an annular gasket, and the collection rod 11 at the lower part of the annular disc is exposed outside the detection cavity 20; in the initial state, in order to keep clean and sanitary, the part of the collecting rod exposed outside the detection cavity 20 is independently packaged with a plastic package bag in advance.

Next, the plastic envelope is torn and removed, and the sample is collected through the capillary channel of the collection rod (e.g., by aligning the capillary channel at the distal end of the collection rod with the finger tip of the subject where the finger tip has been punctured and bleeds, or by placing the capillary channel at the distal end of the collection rod into a container in which the liquid sample is collected, so that the capillary channel 111 is filled with the liquid sample, typically a blood sample.

Thirdly, the detection cavity 20 connected with the blood sampling structure 10 filled with the liquid sample is displaced to the position right above the cavity opening of the liquid transferring cavity 30, as shown in fig. 7; the blood collection structure 10 and the attached test chamber 20 are then inserted into the pipette chamber 30 through the collection rod end 118.

Fourth, the lancing structure 10 is moved within the pipetting cavity 30 in a direction into the pipetting cavity 30 until the pointed tapered collection rod end 117 of the lancing structure reaches the sealing plate 70, i.e., the collection rod end 117 reaches the top of the buffer chamber 40, as shown in FIG. 7.

Fifthly, the blood sampling structure 10 is continuously moved in the liquid transferring cavity 30 along the direction of inserting into the liquid transferring cavity 30, the sealing sheet is pierced at the tail end of the collecting rod, the collecting rod enters the buffer cavity, and when the buffer liquid contacts the bottom end of the capillary channel, part of the sample in the capillary channel of the collecting rod is mixed with the buffer liquid.

Sixthly, the blood sampling structure 10 and the detection cavity 20 are continuously moved in the same direction, and the sealing gasket on the outer wall of the detection cavity and the small cavity on the lower part of the liquid transferring cavity form sealing. Seventhly, the blood sampling structure continues to move along the direction of inserting in the liquid-transfering cavity, the sealed cavity space formed by the small cavity and the buffer cavity is compressed, the pressure in the cavity is increased, the buffer liquid is flushed into the capillary channel to be mixed with the sample, and the mixed liquid flows into the detection cavity through the capillary channel, the through hole, the groove and the through hole of the groove and the barb on the collecting rod, as shown in fig. 8.

Eighth, the detection result on the test element 50 is read to complete the detection.

Claims (10)

1. A whole blood detection device is characterized by comprising a blood sampling structure and a detection cavity, wherein the detection cavity is connected with the blood sampling structure and is in liquid communication with the blood sampling structure; the blood collection structure comprises a collection rod, wherein a capillary channel is arranged in the collection rod, the bottom end of the capillary channel is positioned at the tail end of the collection rod, and the top end of the capillary channel is positioned in the middle of the collection rod; the collecting rod is provided with a through hole which is connected and communicated with the top end of the capillary channel.

2. The whole blood testing device according to claim 1, wherein the collection rod has a groove on its outer surface, the groove is located between the through hole and the top end of the collection rod, and one end of the groove communicates with the through hole.

3. The whole blood testing device according to claim 2, wherein the top end of the collecting rod is provided with a barb, and the bottom of the hook groove of the barb is provided with a through hole; the other end of the groove is connected with the barb and communicated with the through hole; the capillary channel, the through hole, the groove and the hook groove and the through hole of the barb on the collecting rod form a liquid circulation channel.

4. The whole blood testing device according to claim 3, wherein the inner wall of the testing chamber is provided with a first step, and the open end of the barb is engaged with the first step to connect the testing chamber with the blood sampling structure.

5. The whole blood testing device according to claim 1, wherein the collection rod terminates in a pointed cone.

6. The whole blood testing device according to claim 1, wherein the collection rod is provided with an annular disc and an annular gasket sleeved on the collection rod; the bottom of the detection cavity is sealed with the annular disc through an annular gasket.

7. The whole blood testing device according to claim 4, wherein the inner wall of the testing chamber is further provided with a second step above the first step; the whole blood detection device also comprises a buffer pad; the cushion is located on the second step.

8. The whole blood testing device according to claim 1, further comprising a test element located within the testing chamber and a cover that covers and seals the testing chamber.

9. The whole blood testing device according to claim 1, further comprising a buffer chamber, a sealing sheet for sealing the buffer chamber, and a pipetting chamber; the liquid transferring cavity is provided with a large cavity at the upper part and a small cavity at the lower part; the bottom of the small cavity is hermetically connected with the buffer cavity; the buffer liquid is sealed in the buffer cavity.

10. The whole blood testing device according to claim 9, wherein the outer wall of the bottom of the testing chamber is provided with a sealing gasket, the blood sampling structure and the testing chamber enter the pipetting chamber, and the testing chamber and the pipetting chamber are sealed through the sealing gasket.

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