Blood detection device

Abstract

The utility model discloses a blood detection device. The blood detection device comprises a shell, test paper and a cap, the shell comprises an upper shell and a lower shell which are fixedly connected, a containing cavity is formed between the upper shell and the lower shell, the test paper is located in the containing cavity, a blood sampling head is formed at the front end of the shell, a liquid inlet is formed in the blood sampling head, and the liquid inlet is communicated with the containing cavity through a capillary structure and a premixing cavity in sequence; a hydrophobic coating belt arranged in the left-right direction is arranged on the front cavity wall of the premixing cavity, and an air hole communicated with the containing cavity is formed in the rear end of the shell; the front end of the shell is sleeved with the cap, a liquid storage bag is arranged at the bottom in the cap, and buffer liquid is stored in the liquid storage bag. The blood detection device can realize integration of sample collection and sample treatment, and has the advantages of simple structure, low manufacturing cost, convenience in use, high detection success rate, high detection accuracy and the like.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and specifically relates to a blood testing device. Background Technology

[0002] In the field of point-of-care diagnostics, traditional colloidal gold test strips, while simple to operate and low in cost, suffer from numerous problems such as poor sensitivity, insufficient specificity, difficulty in quantification, weak sample adaptability, and lack of quality control. Meanwhile, microfluidic diagnostic products from companies like NOW Diagnostics and Lumos Diagnostics, while representing technological breakthroughs (NOW Diagnostics' product uses direct finger-prick blood testing, while Lumos Diagnostics' product integrates a multi-functional cartridge), suffer from several drawbacks. NOW Diagnostics' product directly analyzes the blood after it is drawn into the microfluidic chip without buffer solution, making it susceptible to interference from blood components and prone to failure due to the small amount of blood. Lumos Diagnostics' product integrates skin puncture, capillary collection, and sample diluent within the cartridge, resulting in a more complex structure and more cumbersome manufacturing process, significantly increasing material and processing costs and hindering market penetration. Therefore, there is an urgent need for a finger-prick blood diagnostic product that can guarantee testing accuracy while reducing costs and making it suitable for the general public. Utility Model Content

[0003] In view of the above problems, this utility model discloses a blood testing device to overcome or at least partially solve the above problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a blood testing device, including a shell, a test strip, and a cap;

[0006] The housing includes an upper shell and a lower shell fixedly connected, with a receiving cavity formed between the upper shell and the lower shell. The test strip is located in the receiving cavity. The front end of the housing is formed as a blood collection head, and the blood collection head has a liquid inlet. The liquid inlet is connected to the receiving cavity through a capillary structure and a premixing cavity in sequence. A hydrophobic coating strip is provided on the front wall of the premixing cavity in a left-right direction. The rear end of the housing has an air hole that communicates with the receiving cavity. The cap is fitted onto the front end of the housing, and a liquid reservoir is provided at the bottom inside the cap. The liquid reservoir stores a buffer solution.

[0007] Furthermore, it also includes a buffer solution box;

[0008] The reservoir is formed inside the buffer solution box, which is fixed inside the cap.

[0009] Furthermore, a guide groove is provided on the inner side wall of the cap, which is used to guide the buffer solution box when it is placed inside the cap.

[0010] Furthermore, the upper shell and the lower shell are connected by double-sided adhesive, and the upper shell, the lower shell, and two adjacent double-sided adhesive strips constitute the receiving cavity and the premixing cavity.

[0011] Furthermore, the lower shell has a premixing groove, a receiving groove, and a venting groove connected sequentially from front to back. The receiving groove and the upper shell constitute the receiving cavity, the premixing groove and the upper shell constitute the premixing cavity, and the venting groove and the upper shell constitute the air hole.

[0012] Furthermore, the premixing tank is provided with multiple spaced columns.

[0013] Furthermore, the bottom of the receiving groove is provided with a plurality of spaced support protrusions, which are used to support the test strip. The groove walls on the left and right sides of the receiving groove are respectively provided with a plurality of corresponding positioning protrusions, which are used to position the test strip left and right.

[0014] Furthermore, the upper shell and / or the lower shell are made of transparent material;

[0015] Alternatively, the upper shell may have a window corresponding to the position of the reaction zone on the test strip.

[0016] Furthermore, the upper shell or the lower shell has an inverted triangular notch at the liquid inlet.

[0017] Furthermore, the housing is provided with a first limiting protrusion, and the cap is provided with a second limiting protrusion and a third limiting protrusion spaced apart, the third limiting protrusion being located in front of the second limiting protrusion; when the housing is inserted into the cap and the first limiting protrusion passes over the second limiting protrusion and is located between the second limiting protrusion and the third limiting protrusion, the housing and the cap are relatively fixed, and the blood collection head does not contact the reservoir; when the housing is inserted into the cap and the first limiting protrusion passes over the second limiting protrusion and the third limiting protrusion, the blood collection head punctures the reservoir.

[0018] Alternatively, the housing may have an external thread, and the cap may have an internal thread that engages with the external thread; when the housing is screwed into the cap in a first position, the housing and the cap are relatively fixed, and the blood collection head does not contact the reservoir; when the housing is screwed into the cap in a second position, the blood collection head punctures the reservoir.

[0019] The advantages and beneficial effects of this utility model are:

[0020] In this blood testing device, a hydrophobic coating strip is provided on the front wall of the premixing chamber, which enables precise control of the blood collection volume, thereby improving the accuracy of the test. Furthermore, a reservoir containing buffer solution is provided inside the cap, which can assist in the test and make the test success rate even higher. This blood testing device can realize the integration of sample collection and sample processing, and has the advantages of simple structure, low manufacturing cost, convenient use, high test success rate and high test accuracy. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0022] Figure 1 This is a three-dimensional structural diagram of a blood detection device in one embodiment of the present invention;

[0023] Figure 2 This is an exploded structural diagram of a blood detection device in one embodiment of the present invention;

[0024] Figure 3 This is a three-dimensional structural view of the housing from a top view in one embodiment of the present invention;

[0025] Figure 4 This is a three-dimensional structural view of the housing from a bottom angle in one embodiment of the present invention;

[0026] Figure 5 This is a perspective view of the cap in one embodiment of the present invention;

[0027] Figure 6 This is a perspective view of the lower shell in one embodiment of the present invention;

[0028] Figure 7 This is a top view of the lower shell in one embodiment of the present invention.

[0029] In the diagram: 1. Cap; 2. Upper shell; 3. Lower shell; 4. Liquid inlet; 5. Vent; 6. Buffer solution box; 7. Guide groove; 8. Premixing tank; 9. Receiving tank; 10. Ventilation groove; 11. Column; 12. Support boss; 13. Positioning protrusion; 14. Notch; 15. First limiting protrusion; 16. Second limiting protrusion; 17. Separating ridge; 18. Microchannel; 19. Hydrophobic coating strip. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] To facilitate understanding of this utility model, Figure 1 The right side is the front or front part of the blood testing device, making Figure 1 The left side is the rear or back part of the blood testing device, making Figure 1 The upper side is the left side of the blood testing device, making Figure 1 The lower side is the right side of the blood testing device.

[0032] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0033] One embodiment of this utility model provides a blood detection device, such as... Figures 1 to 7 As shown, the blood testing device includes a housing, a test strip (not shown), and a cap 1.

[0034] Specifically, the housing includes an upper shell 2 and a lower shell 3 fixedly connected, with a receiving cavity formed between the upper shell 2 and the lower shell 3. The test strip is located in the receiving cavity, which extends in the front-to-back direction within the housing. The front end of the housing forms a blood collection head, which can be conical or flattened triangular to facilitate sampling. The blood collection head has a liquid inlet 4, which is connected to the receiving cavity via a capillary structure and a premixing cavity. When a blood sample is located at the liquid inlet 4, the capillary action of the capillary structure draws the blood sample into the housing, thus collecting the sample. The premixing cavity is used to premix the blood sample with the buffer solution. A hydrophobic coating strip 19 is provided on the front wall of the premixing cavity in the left-right direction, causing the blood sample drawn in through the capillary structure to stop at the hydrophobic coating strip 19, thereby controlling the amount of blood sample collected and achieving precise control of the blood collection volume. This ensures that the collected volume is controlled to meet the minimum effective amount for detection and avoids sample waste. In the manufacturing of the blood testing device, the amount of blood sample collected can be controlled by adjusting the specific position of the hydrophobic coating strip 19, thereby meeting different testing requirements. A vent 5, communicating with the receiving cavity, is located at the rear end of the housing. When the blood sample and buffer solution enter the housing, air in the receiving cavity can be expelled through the vent 5, ensuring that the blood sample and buffer solution can smoothly enter the housing.

[0035] Furthermore, the cap 1, fitted onto the front end of the casing, protects the blood collection head and prevents contamination. A reservoir (not shown in the figure) is located at the bottom inside the cap 1, storing buffer solution to assist blood sample testing. This reservoir simplifies the overall product structure and reduces the cost of a complex built-in buffer solution system. Moreover, by changing the buffer solution formulation and test strip markers within the reservoir, it can be adapted to various colloidal gold detection projects (such as infectious disease and hormone testing).

[0036] The blood testing device is used as follows: First, remove the cap 1 from the front end of the housing and bring the blood collection head close to the bleeding point on the fingertip, so that the liquid inlet 4 contacts the blood; after a period of time, remove the blood collection head from the fingertip and put the cap 1 back on the front end of the housing, so that the blood collection head extends to the bottom of the cap 1 and punctures the reservoir; at this time, the buffer solution enters the housing through the liquid inlet 4 and mixes with the blood sample across the hydrophobic coating 19 in the premixing chamber. The mixed liquid will contact the test strip and reach the reaction zone of the test strip from the chromatography zone; finally, the user can judge the test result by visually observing the test strip.

[0037] It should be noted that when the test strip is placed in the receiving cavity, the front end of the test strip should be located in or near the premixing cavity so that the blood sample and buffer solution can come into contact with the test strip after mixing.

[0038] In summary, the blood testing device of this embodiment achieves precise control of blood volume by setting a hydrophobic coating strip on the front wall of the premixing chamber, thereby improving the accuracy of the test. Furthermore, a reservoir containing buffer solution is set inside the cap, which can assist in the test and make the test success rate even higher. This blood testing device can realize the integration of sample collection and sample processing, and has the advantages of simple structure, low manufacturing cost, convenient use, high test success rate and high test accuracy.

[0039] In this embodiment, as Figure 2 As shown, the blood testing device also includes a buffer solution cartridge 6.

[0040] The reservoir is formed within the buffer cartridge 6, which is detachably secured within the cap 1. Specifically, during the production and assembly of the blood testing device, the buffer solution is first poured into the buffer cartridge 6, and the opening of the cartridge 6 is sealed with a film or aluminum foil. The cartridge 6 is then inserted into the cap 1. This prevents the reservoir from rupturing when inserted into the cap 1. Furthermore, the buffer solution can be replaced by changing the buffer cartridge 6 to accommodate the dilution requirements of different testing procedures.

[0041] And, as Figure 5As shown, a guide groove 7 is provided on the inner wall of the cap 1. The guide groove 7 is used to guide the buffer solution cartridge 6 when it is placed into the cap 1, so that the buffer solution cartridge 6 is accurately installed into the fixed area inside the cap 1. This ensures that when the front end of the shell is inserted to the bottom of the cap 1, the blood collection head can accurately puncture the reservoir. In addition, a draft angle can be formed at the bottom of the cap, and the buffer solution cartridge can be tightly fitted at the draft angle to achieve relative fixation between the cap and the buffer solution cartridge.

[0042] In this embodiment, as Figure 6 and Figure 7 As shown, the lower shell 3 has a premixing tank 8, a receiving tank 9, and a venting tank 10 connected sequentially from front to back. The receiving tank 9 and the upper shell 2 form a receiving cavity, the premixing tank 8 and the upper shell 2 form a premixing cavity, and the venting tank 10 and the upper shell 2 form an air hole 5. The upper shell and the lower shell are bonded or snapped together with liquid adhesive.

[0043] Of course, in other embodiments, the premixing tank, the receiving tank, and the venting tank may also be formed on the upper shell; or, the upper shell and the lower shell may be connected by double-sided adhesive, and the upper shell, the lower shell, and two adjacent double-sided adhesives may form a receiving cavity and a premixing cavity, which is also within the protection scope of this utility model.

[0044] And, as Figure 6 and Figure 7 As shown, a microchannel 18 is formed at the front end of the lower shell 3, and the microchannel 18 and the upper shell 2 constitute a capillary structure. The capillary structure can also be composed of multiple capillaries.

[0045] In addition, such as Figure 6 and Figure 7 As shown, the premixing tank 8 is provided with multiple spaced columns 11; on the one hand, during blood testing, the columns 11 prevent foreign objects from entering the containment cavity and prevent interference with the reaction; on the other hand, the columns 11 cause turbulence between the blood sample and the buffer solution during flow, making the two mix more thoroughly.

[0046] In this embodiment, as Figure 6 and Figure 7 As shown, there are multiple receiving slots 9, with adjacent receiving slots 9 separated by a partition ridge 17. The front end of each receiving slot 9 is connected to a premixing tank 8, and the rear end of each receiving slot 9 is connected to a corresponding ventilation slot 10. Each receiving slot 9 contains a test strip. By setting multiple test strips, the randomness of the detection can be prevented, thereby ensuring the accuracy of the detection. Preferably, there are three receiving slots.

[0047] And, as Figure 6 and Figure 7As shown, the bottom of the receiving groove 9 is provided with multiple spaced support protrusions 12. The support protrusions 12 are used to support the test paper, reduce the contact area between the test paper and the lower shell 3, and thus ensure the accuracy of the test. Multiple corresponding positioning protrusions 13 are provided on the groove walls on the left and right sides of the receiving groove 9. The positioning protrusions 13 are used to position the test paper left and right to prevent the test paper from shaking left and right in the receiving groove 9.

[0048] In addition, the upper shell 2 and / or the lower shell 3 are made of transparent material; this allows the reaction area of ​​the test strip to be seen through the upper shell 2 or the lower shell 3, thus enabling the understanding of the test results. Specifically, the upper shell 2 and / or the lower shell 3 are made of ordinary transparent plastic, which is rapidly mass-produced through injection molding, reducing the production cost of the shell.

[0049] In other embodiments, the upper shell has a window corresponding to the position of the reaction area on the test strip, through which the test results can be viewed.

[0050] In this embodiment, as Figure 4 and Figure 7 As shown, the lower shell 3 has an inverted triangular notch 14 at the liquid inlet 4, which makes it easier for blood samples to enter the shell through the liquid inlet 4. Of course, the notch can also be made on the upper shell.

[0051] Furthermore, such as Figures 3 to 5 As shown, the shell has a first limiting protrusion 15, and the cap 1 has a second limiting protrusion 16 and a third limiting protrusion spaced apart, with the third limiting protrusion located in front of the second limiting protrusion 16. When the shell is inserted into the cap 1, and the first limiting protrusion 15 passes over the second limiting protrusion 16 and is located between the second limiting protrusion 16 and the third limiting protrusion, the shell and the cap 1 are relatively fixed, and the blood collection head does not contact the reservoir. When the shell is inserted into the cap 1, and the first limiting protrusion 15 passes over the second limiting protrusion 16 and the third limiting protrusion, the blood collection head punctures the reservoir. In this way, the cap 1 can be pressed in the front-to-back direction to puncture the reservoir, triggering the release of buffer solution through a simple combined action, greatly simplifying the operation process and reducing costs, making it more convenient to use.

[0052] Furthermore, the test strip uses common lateral chromatography materials, leveraging their natural hydrophilicity and excellent chromatographic properties to ensure that blood samples can smoothly reach the reaction zone, reducing the cost increase associated with specialized materials. Moreover, the spacing between the test line and control line on the test strip can be rationally designed according to actual needs, thereby enabling accurate interpretation of test results.

[0053] In another embodiment, the housing is provided with an external thread, and the cap is provided with an internal thread that mates with the external thread; when the housing is screwed into the cap in a first position, the housing and the cap are relatively fixed, and the blood collection head does not contact the reservoir; when the housing is screwed into the cap in a second position, the blood collection head punctures the reservoir.

[0054] The above description is merely a specific embodiment of this utility model. Under the teachings of this utility model, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of this utility model, and the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A blood testing device, characterized by, Includes casing, test strips, and cap; The housing includes an upper shell and a lower shell fixedly connected, with a receiving cavity formed between the upper shell and the lower shell. The test strip is located in the receiving cavity. The front end of the housing is formed as a blood collection head, and the blood collection head has a liquid inlet. The liquid inlet is connected to the receiving cavity through a capillary structure and a premixing cavity in sequence. A hydrophobic coating strip is provided on the front wall of the premixing cavity in a left-right direction. The rear end of the housing has an air hole that communicates with the receiving cavity. The cap is fitted onto the front end of the housing, and a liquid reservoir is provided at the bottom inside the cap. The liquid reservoir stores a buffer solution.

2. The blood testing device of claim 1, wherein, It also includes a buffer solution box; The reservoir is formed inside the buffer solution box, which is fixed inside the cap.

3. The blood testing device of claim 2, wherein, The inner wall of the cap is provided with a guide groove, which is used to guide the buffer solution box when it is placed inside the cap.

4. The blood testing device of claim 1, wherein, The upper shell and the lower shell are connected by double-sided adhesive tape, and the upper shell, the lower shell, and two adjacent double-sided adhesive tapes constitute the receiving cavity and the premixing cavity.

5. The blood testing device of claim 1, wherein, The lower shell has a premixing groove, a receiving groove, and a venting groove connected sequentially from front to back. The receiving groove and the upper shell constitute the receiving cavity, the premixing groove and the upper shell constitute the premixing cavity, and the venting groove and the upper shell constitute the air hole.

6. The blood testing device of claim 5, wherein, The premixing tank is equipped with multiple spaced columns.

7. The blood testing device of claim 5, wherein, The bottom of the receiving groove is provided with a plurality of spaced support protrusions, which are used to support the test strip. The left and right sides of the receiving groove are provided with a plurality of corresponding positioning protrusions, which are used to position the test strip left and right.

8. The blood testing device of claim 1, wherein, The upper shell and / or the lower shell are made of transparent material; Alternatively, the upper shell may have a window corresponding to the position of the reaction zone on the test strip.

9. The blood detection device according to claim 1, characterized in that, The upper shell or the lower shell has an inverted triangular notch at the liquid inlet.

10. The blood testing device according to any one of claims 1 to 9, wherein, The housing has a first limiting protrusion, and the cap has a second limiting protrusion and a third limiting protrusion spaced apart, with the third limiting protrusion located in front of the second limiting protrusion. When the housing is inserted into the cap and the first limiting protrusion passes over the second limiting protrusion and is located between the second limiting protrusion and the third limiting protrusion, the housing and the cap are relatively fixed, and the blood collection head does not contact the reservoir. When the housing is inserted into the cap and the first limiting protrusion passes over the second limiting protrusion and the third limiting protrusion, the blood collection head punctures the reservoir. Alternatively, the housing may have an external thread, and the cap may have an internal thread that engages with the external thread; when the housing is screwed into the cap in a first position, the housing and the cap are relatively fixed, and the blood collection head does not contact the reservoir; when the housing is screwed into the cap in a second position, the blood collection head punctures the reservoir.

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