Blood sampling device

Abstract

The utility model provides a blood sampling device. The blood sampling device comprises a tube body, the two ends of the barrel body are opened, and the barrel body is arranged on the outer side of the pipe body; an interlayer for accommodating blood is formed between the barrel body and the tube body; and the position of the upper end of the tube body is higher than the position of the joint between the barrel body and the tube body, so that blood in the tube body passes through the upper end and enters the interlayer. The utility model has the advantages of simple structure and the like.

Description

Technical Field

[0001] The utility model relates to blood sampling, in particular to a blood sampling device. Background Art

[0002] Conventional peripheral blood sampling and collection are mainly achieved by scraping method or capillary action suction method.

[0003] For the scraping method, the blood sample scraping part at the upper end of the blood collection tube body is used to scrape the blood into the tube body, and the blood is shaken into the bottom of the tube body by repeated shaking until the blood sample collection is completed.

[0004] For the capillary action suction method, it mainly relies on siphon and capillary action to transport blood. This type of blood sampling and collection device usually consists of two parts: capillary glass tube collection and conventional blood collection tube collection. After the blood collection needle pierces the blood collection site and wipes the first drop of blood, the capillary glass tube is inserted into the extruded blood drop. Due to the siphon principle, blood will flow along the glass tube wall from the near blood sample section of the capillary glass tube. The inhaled blood sample forms a thin liquid film on the inner wall of the collection device, and this liquid film adheres to the blood in the capillary glass tube, enabling the blood sample to be continuously attracted and transported. Subsequently, the blood sample in the capillary glass tube is transferred to the blood collection tube to complete the blood sample collection. The disadvantages of this method are as follows:

[0005] During the collection process, accurate quantification cannot be achieved. In cases where accurate quantification is required for sample addition, a pipette gun needs to be used for sample addition. This requires higher requirements for blood sample collectors in actual application scenarios, and the operation is cumbersome, and the equipment required also increases accordingly. Summary of the Invention

[0006] To solve the deficiencies in the above-mentioned prior art solutions, the utility model provides a blood sampling device.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A blood sampling device, including a tube body; the blood sampling device further includes:

[0009] A cylinder body with both ends open and arranged outside the tube body; a sandwich for accommodating blood is formed between the cylinder body and the tube body; the position of the upper end of the tube body is higher than the position of the connection between the cylinder body and the tube body, so that the blood in the tube body can cross the upper end and enter the sandwich.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. It has a quantification function;

[0012] By setting up a blood temporary storage space - a sandwich layer on the outer side of the tube body, the excessive blood sample temporary storage area is increased. In the case of excessive blood sample collection, the excess blood sample will overflow through the upper end or (quantitative) notch of the tube body and be transferred to the temporary storage area, so as to achieve accurate quantitative sampling;

[0013] 2. Simple operation;

[0014] Integrating quantification and sample addition in the blood collection tube body can streamline the equipment in actual operation, simplify the operation process, reduce the requirements for operators, facilitate operation, reduce the probability of misoperation, and improve the reliability of experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Referring to the accompanying drawings, the disclosure of the present utility model will become more understandable. It is easy for those skilled in the art to understand that these drawings are only used to illustrate the technical solutions of the present utility model and are not intended to limit the protection scope of the present utility model. In the figures:

[0016] Figure 1 is a structural schematic diagram of the blood collection device according to the present utility model;

[0017] Figure 2 is another state schematic diagram of the blood collection device according to the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Figure 1 - Figure 2 The following description and the following illustrate alternative specific embodiments of the present utility model to teach those skilled in the art how to implement and reproduce the present utility model. To teach the technical solutions of the present utility model, some conventional aspects have been simplified or omitted. Those skilled in the art should understand that variations or substitutions derived from these specific embodiments will fall within the scope of the present utility model. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of the present utility model. Thus, the present utility model is not limited to the following alternative specific embodiments, but is only defined by the claims and their equivalents.

[0019] Embodiment 1

[0020] As Figure 1 shown, a blood collection device according to an embodiment of the present utility model includes:

[0021] A tube body 1 with both ends open;

[0022] A cylinder body 2 with both ends open and disposed outside the tube body 1; a sandwich layer 7 for accommodating blood is formed between the cylinder body 2 and the tube body 1; the position of the upper end of the tube body 1 is higher than the position of the connection between the cylinder body 2 and the tube body 1, so that the blood in the tube body 1 can cross the upper end and enter the sandwich layer 7.

[0023] In order to better utilize capillary action to absorb blood samples, further, the tube body 1 includes a section 11 with an increasing inner diameter and a section 12 with a constant inner diameter. The cylindrical body 2 is located outside the section 12 with a constant inner diameter and is connected to the outer wall of the section 12 with a constant inner diameter.

[0024] In order to conveniently seal the cylindrical body so that a quantitative blood sample is stored in the tube body 1, further, the blood collection device further includes:

[0025] A first connecting portion 21, the first connecting portion 21 being connected to the upper portion of the cylindrical body 2;

[0026] A cap 4 and a plug 5, the first connecting portion 21 sequentially connecting the cap 4 and the plug 5. The cap 4 is used to seal the upper end opening of the cylindrical body 2, and the plug 5 is used to seal the opening 3 at one end of the tube body 1 away from the cylindrical body 2.

[0027] In order to conveniently disconnect the connection between the cap 4 and the plug 5, further, a second connecting portion 8 is provided between the cap 4 and the plug 5.

[0028] In order to obtain a quantitative blood sample, further, the upper end of the tube body 1 has an (overflow) notch 6.

[0029] Embodiment 2

[0030] An application example of the blood collection device according to Embodiment 1 of the present invention.

[0031] In this application example, as Figure 1 shown, both ends of the tube body 1 are open, and one opening 3 is a tip. The tube body 1 includes a connected section 11 with an increasing inner diameter and a section 12 with a constant inner diameter. The upper end of the section 12 with a constant inner diameter has an overflow notch 6. The cylindrical body 2 is made of soft plastic, and the bottom end is hermetically connected to the outer wall of the section with a constant inner diameter, so that an annular interlayer 7 is formed between the section 12 with a constant inner diameter and the cylindrical body 2. Furthermore, the blood sample in the tube body 1 overflows into the interlayer 7 through the notch 6, realizing the accurate quantification of the blood sample.

[0032] The upper outer wall of the cylindrical body 2 is connected to the first connecting portion 21, the cap 4, the second connecting portion 8 and the plug 5. The thickness of the second connecting portion 8 is small and easy to break, so that the cap 4 and the plug 5 are separated.

[0033] The working mode of the blood collection device in this embodiment is as follows:

[0034] During sampling, first disinfect the sampling site, then use a blood collection needle to pierce the site to be sampled. After wiping the first drop of blood, wait for the blood to flow out.

[0035] Place the opening 3 at one end of the tube body 1 on the blood drop. Under the action of siphon and capillary action, the blood sample will enter the tube body 1 from the opening 3 at one end.

[0036] The blood sample rises within the section 11 with an increasing inner diameter and the section 12 with a constant inner diameter, and the blood sample collection is completed when the blood sample reaches the notch 6. If an excessive amount of blood sample is collected, the excess blood sample will overflow along the notch 6 into the interlayer (temporary storage area for excessive blood samples) 7, thereby achieving quantitative collection.

[0037] After the collection is completed, break off the second connecting part 8, and the plug 5 surrounds and seals one end opening 3. Bend the first connecting part 21, and the cap 4 covers the upper end opening of the cylinder body 2, so that the quantified blood sample is sealed within the tube body 1, as Figure 2 shown.

Claims

1. A blood sampling device, comprising a tube body; characterized in that: The blood sampling device also includes: The barrel has openings at both ends and is arranged on the outside of the tube; a blood-containing interlayer is formed between the barrel and the tube; the position of the upper end of the tube is higher than the position of the connection between the barrel and the tube, so that the blood in the tube passes over the upper end and enters the interlayer.

2. The blood collection device according to claim 1, characterized in that: The tube body comprises a section with enlarged inner diameter and a section with constant inner diameter, and the cylinder body is located outside the section with constant inner diameter and connected to the outer wall of the section with constant inner diameter.

3. The blood collection device according to claim 1, characterized in that: The blood sampling device also includes: a first connection portion, the first connection portion being connected to an upper portion of the cylinder; A cover cap and a plug, wherein the first connecting portion sequentially connects the cover cap and the plug, the cover cap is used to close the upper end opening of the cylinder, and the plug is used to close the end opening of the tube body away from the cylinder.

4. The blood collection device according to claim 3, characterized in that: A second connecting portion is arranged between the cover cap and the plug.

5. The blood collection device according to claim 3, characterized in that: The plug surrounds the opening of the cylinder.

6. The blood collection device according to claim 1, characterized in that: The upper end of the tube body is provided with a notch.

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