A peripheral blood collection tube

Abstract

The present invention relates to the field of blood sampling, and in particular to a peripheral blood collection tube, comprising: a micro blood collection tube, which is provided with a first channel for sucking blood from capillaries and storing blood; a main body, which is internally formed with a cavity for the micro blood collection tube to enter, and further comprises a peripheral structure with a motion unit inside, wherein the motion unit divides the interior of the peripheral structure into a plurality of mutually independent regions, wherein the motion unit is configured to seal a second opening of the peripheral structure with the main body, and then moves within the peripheral structure to reduce the pressure of the region where the micro blood collection tube is located, and an air suction passage connected to the interior of the peripheral structure is reserved on the main body, and the movement of the motion unit reduces the pressure inside the main body; after the main body enters the interior of the peripheral structure, the motion unit moves to perform air suction and pressure reduction treatment on the interior, thereby forming an air suction passage connecting the main body and the peripheral structure, so that negative pressure is also formed in the cavity of the main body, and when blood is collected, the fluidity of blood can be improved, thereby accelerating the collection of blood.

Description

Technical Field

[0001] The invention relates to the field of blood sampling, in particular to a peripheral blood sampling tube. Background Art

[0002] The blood collection tube commonly known by people, such as the blood collection tube named as application number CN201280046310.6, has a negative pressure state inside, and cooperates with a micropipette to suck the blood in the human body into the blood collection tube under negative pressure.

[0003] Another instrument for collecting human blood is the peripheral blood collection tube. The total blood volume required for this type of blood is very small. During use, the capillaries on the fingertips need to be punctured, and the blood flows into the micro blood collection tube by gravity. After the blood flows into the micro blood collection tube, the micro blood collection tube is placed in a tube body with a bottom, and then a cover body is used to seal the opening of the tube body. After collecting the micro blood collection tube, a special ear washing bulb is inserted into the micro blood collection tube, and the blood in the blood collection tube is squeezed into a test tube with anticoagulant by squeezing the ear washing bulb.

[0004] In short, if the anticoagulant is not added to the drawn blood in time, the blood will coagulate. In the above-mentioned traditional blood collection method, blood collection and blood injection into the anticoagulant are two separate steps. Therefore, after the blood is collected in the former, it will be retained for a certain period of time before it will be fused with the anticoagulant.

[0005] Therefore, it is not difficult to conclude that traditional blood collection requires strict control of the time when blood is injected into the anticoagulant to ensure that the anticoagulant can be used effectively to prevent blood clotting and prevent blood from clotting in the micro-blood collection tube. In addition, without using an additional ear cleaning bulb, blood is not easy to flow out of the micro-blood collection tube and flows slowly. When using the ear cleaning bulb, if it is not controlled well, it will be sucked back into the inside of the ear cleaning bulb.

[0006] Another possibility is that when collecting blood, the blood collection needle of the peripheral blood collection tube does not pierce the capillary, or the interior of the peripheral blood collection tube is in a sealed state, and the downward pressure of the blood causes the air pressure to increase, making it difficult for blood to enter the tube. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a peripheral blood collection tube, which can solve the problem of low blood collection efficiency in the prior art.

[0008] To achieve the above object, the technical solution adopted by the present invention is: a peripheral blood collection tube, comprising:

[0009] Micro blood collection tubes have the first channel for sucking blood from capillaries and storing it;

[0010] The main body has a cavity formed inside for the micro-blood collection tube to enter;

[0011] The invention is characterized in that it also includes a peripheral structure with a motion unit inside, the motion unit divides the interior of the peripheral structure into a plurality of mutually independent areas, the motion unit is configured to seal the second opening of the peripheral structure with the main body, and then moves within the peripheral structure to reduce the pressure in the area where the micro-blood collection tube is located, and an air suction channel connected to the interior of the peripheral structure is reserved on the main body, and the movement of the motion unit reduces the pressure inside the main body.

[0012] Furthermore, the main body is a tubular structure with a bottom, and the main body has a cavity with a first opening facing upward. The first opening is adapted to the outer diameter of the micro-blood collection tube. After the micro-blood collection tube enters the cavity, the first opening constrains the micro-blood collection tube to remain in an upright position.

[0013] Furthermore, the moving unit is in contact with a whole circle of the inner wall of the peripheral structure and is located in the middle area of ​​the peripheral structure or in an area close to the bottom end.

[0014] Furthermore, the main body includes a plug and a blood collection tube, a second opening is provided on one end of the plug facing away from the motion unit, the first opening is located on the plug, the plug covers the second opening, and the air extraction channel is located on the plug.

[0015] Furthermore, it also includes an adjusting rod. An adjusting channel passing through the air extraction channel is provided in the plug. The adjusting channel extends to the surface of the plug. The adjusting rod enters from the adjusting channel to intercept the airflow in the air extraction channel.

[0016] Furthermore, a cover cap is provided on the plug, the central area of ​​the plug surface is an ejection area extending upward, the cover cap has a shape matching the ejection area, the first opening is located in the ejection area, and the cover plate can close the ejection area.

[0017] Furthermore, the motion unit includes a spring, a piston rod and a piston handle formed below the piston rod. The piston rod contacts the inner wall of the peripheral structure, dividing the interior of the peripheral structure into upper and lower areas. The spring is fixed above the piston rod, and one end of the spring is maintained opposite to the blood collection tube.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention adopts a peripheral structure with a motion unit inside. After the main body enters the inner peripheral structure, the interior of the peripheral structure can be sealed. After the main body enters the interior of the peripheral structure, the motion unit performs suction and pressure reduction treatment on the interior through movement, forming an air suction passage connecting the main body and the peripheral structure, so that negative pressure is also formed in the cavity of the main body. When blood is collected, blood can be quickly sucked into the micro-blood collection tube, and the collection operation is easy and efficient.

[0020] 2. The blood collection is combined from two separate links into one link. After the blood is collected, it can be quickly injected into the anticoagulant, which shortens the retention time of the blood after it is drawn out and prevents the blood from coagulating after it is drawn out. At the same time, it replaces the use of ear washing bulbs, and the problems of blood backflow and slow blood flow can be completely solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the present invention.

[0022] Figure 2 It is a perspective view of the present invention.

[0023] Figure 3 This is a cross-sectional view of the micro-blood collection tube after it is assembled with the main body and separated from the peripheral structure.

[0024] Figure 4 It is a cross-sectional view of the plug.

[0025] Figure 5 It is a three-dimensional diagram after the cap and the blood collection tube are assembled. DETAILED DESCRIPTION

[0026] In the specification, references to "one embodiment", "an embodiment" or "some embodiments" mean that a particular feature, structure or element described with reference to the embodiment is included in at least one embodiment of the subject matter being described. Thus, sentences in the specification saying "in one embodiment" or "in an embodiment" or "in some embodiments" do not necessarily refer to the same embodiment or embodiments. The particular features, structures or elements may be further combined in any embodiment in a suitable manner.

[0027] The present invention is a peripheral blood collection tube, such as Figure 1-5 As shown, it includes a micro blood collection tube 1, a main body, a peripheral structure 3, and a motion unit.

[0028] The micro-sampling tube 1 is inserted into the interior of the main body. In this embodiment, the main body is a tubular structure with a bottom. The main body has a cavity with a first opening facing upward. The first opening is adapted to the outer diameter of the micro-sampling tube 1. After the micro-sampling tube 1 enters the cavity, the first opening constrains the micro-sampling tube 1 to remain in an upright position. After piercing the skin of the fingertip, blood flows into the first channel in the micro-sampling tube 1.

[0029] The upper and lower end surfaces of the peripheral structure 3 are open structures. In this embodiment, the peripheral structure 3 is a cylinder, and the motion unit is in contact with the inner wall of the cylinder. The friction force formed by this contact can ensure that the position of the motion unit remains unchanged.

[0030] In addition, the motion unit is in contact with a complete circle of the inner wall of the peripheral structure 3 and is located in the middle area of ​​the peripheral structure 3 or in the area near the lower end. In short, the motion unit divides the interior of the peripheral structure 3 into a first area A and a second area B above and below, and the air between the two areas is not connected to each other.

[0031] After the main body enters the interior of the peripheral structure 3, it will press the moving unit to move the moving unit in the direction X of the lower end of the peripheral structure 3. It should be noted that the movement of the moving unit includes the situation where the moving unit still moves after the main body seals the first opening. In this regard, the continuous downward movement of the moving unit reduces the pressure in the first area A, and the first area A is in a low-pressure state.

[0032] An air exhaust passage 22 is reserved on the main body. The air exhaust passage 22 is located at the upper part of the main body. The air exhaust passage 22 is connected to the main body. It can be seen that the pressure inside the main body is also reduced according to the air exhaust passage 22.

[0033] It can be seen that the present invention extracts the gas inside the main body through the motion unit, making the interior of the main body in a negative pressure state. For the micro-sampling tube 1 in the main body, the first channel quickly absorbs the blood gushing out of the fingertips, thereby improving the blood collection efficiency. When the micro-sampling tube 1 and the blood cannot fully correspond due to hand shaking, the negative pressure airflow can effectively solve this problem.

[0034] In addition, when blood is stored in the micro-blood collection tube 1, the blood will not enter the peripheral structure 3. Therefore, after the blood is collected, the main body can be separated from the peripheral structure 3, thereby achieving the purpose of reusing the peripheral structure 3 and the motion unit.

[0035] When the amount of peripheral bleeding is small, the peripheral structure 3, the motion unit and the main body can be assembled again to form negative pressure again to cope with a longer blood collection process.

[0036] In the embodiment, an anticoagulant can be filled into the body. In short, when a small amount of blood is required, the blood can be directly stored in the micro-blood collection tube. When a larger amount of blood needs to be collected, the blood can enter the body through the micro-blood collection tube 1, and the body will store the blood.

[0037] In addition, the aperture of the air extraction channel 22 is between 60-90 microns. The smaller the aperture, the longer the negative pressure effect formed in the body can be maintained. The body includes a plug 23 and a blood collection tube 24. When the blood collection tube 24 is in an upright position, the upper end surface is a second opening. The first opening is located on the plug 23. The plug 23 covers the second opening. The air extraction channel 22 is located on the plug 23. The plug 23 is made of soft material and has a good sealing effect.

[0038] Specifically, the flow path of the gas in the air extraction channel 22 is controllable, and the controllable manner can accurately adjust the suction force to ensure that appropriate blood flows into the blood collection tube 24 or the micro blood collection tube 1.

[0039] In the embodiment, an adjusting rod 4 is also included. An adjusting channel 41 passing through the air exhaust channel 22 is provided in the plug portion 23. The adjusting channel 41 extends to the surface of the plug portion 23. The adjusting rod 4 enters from the adjusting channel 41. According to the amount of the adjusting rod 4 entering the adjusting channel 41, the airflow in the air exhaust channel 22 is intercepted, thereby ensuring precise control of the gas flow.

[0040] During production, the flow rate of the airflow passing through the air extraction channel 22 can be adjusted by adjusting the rod 4 .

[0041] The air extraction channel 22 can be a pre-buried pipeline when preparing the plug 23, or it can be a pre-buried rod-shaped structure obtained by extracting the rod-shaped structure after the plug 23 is manufactured. The adjustment rod 4 can be a pointed structure, and the ventilation volume can be adjusted by the insertion depth.

[0042] A cap 5 is also provided on the plug 23. The central area of ​​the surface of the plug 23 is an ejection area 21a extending upward. The cap 5 has a shape that matches the ejection area 21a. The first opening is located on the ejection area 21a. After the cap 5 is assembled to the ejection area 21a, the first opening is sealed to prevent the micro-sampling tube 1 and the blood sampling tube 24 from being contaminated before use, and to prevent the blood in the micro-sampling tube 1 from pouring out.

[0043] The size of the cap 5 is adapted to the outer circumference of the blood collection tube 24. When the blood is stored in the blood collection tube 24, the peripheral mechanism 3 can be removed and the cap 5 can be used to seal the second opening on the blood collection tube 24 to prevent the blood from pouring out or leaking.

[0044] The motion unit includes a spring 61, a piston rod 62 and a piston handle 63 formed below the piston rod 62. The piston rod 62 contacts the inner wall of the peripheral structure 3, dividing the interior of the peripheral structure 3 into upper and lower areas. The spring 61 is fixed above the piston rod 62, and one end of the spring 61 is relative to the blood collection tube 24. After the main body enters the interior of the peripheral structure 3, the spring 61 is compressed, and the piston rod 62 is squeezed toward the lower end surface of the peripheral structure 3 through the spring 61.

[0045] It should be noted that after the main body is assembled with the peripheral structure 3 , the piston rod 62 is still reset by the spring 61 and moves a certain distance, so that a negative pressure environment can be continuously formed in the peripheral structure 3 .

[0046] It should also be noted that the specific travel distance and speed of the piston rod 62 in the peripheral structure 3 are determined by the length and elastic coefficient of the spring 61 .

[0047] It should be noted that the radial length of the plug 23 is greater than the radial length of the peripheral structure 3, and a groove 23a is provided below the area of ​​the plug 23 close to the periphery, and the groove 23a and the edge of the peripheral structure 3 correspond to each other. When the edge enters into the groove 23a, the plug 23 immediately seals the first area A. Specifically, the plug 23 can be silicone, and the edge of the peripheral structure 3 is squeezed into the groove 23a. In the embodiment, the edge of the peripheral structure 3 continues to enter the groove 23a, thereby realizing continued movement in a closed environment.

[0048] When in use, the piston rod 62 is first pushed toward the upper end surface of the peripheral structure 3 to reduce the space in the first area A, and then the main body and the peripheral structure 3 are assembled;

[0049] During assembly, the piston handle 63 needs to be supported by hand or a table to prevent the piston rod 62 from moving; the spring 61 will be compressed during the assembly process. After the assembly is completed, the restriction on the piston rod 62 is released. Under the action of the spring 61, the piston rod 61 moves toward the lower end surface of the peripheral structure 3, expanding the space of the first area A, so that negative pressure is formed in the first area A;

[0050] Furthermore, due to the small aperture and adjustable setting of the air extraction channel 22, the negative pressure formed in the first area A can be maintained for a longer period of time to meet the blood collection requirements. If the negative pressure does not meet the blood collection time requirements, the body and the peripheral structure 3 can be disassembled again to achieve secondary negative pressure and blood collection. It should be noted that the cap 5 should be installed on the ejection area 21a during the secondary assembly, and the assembly should be slow to prevent the blood in the micro-sampling tube 1 from gushing out due to changes in air pressure during assembly.

[0051] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A peripheral blood collection tube, comprising: Micro blood collection tubes have the first channel for sucking blood from capillaries and storing it; The main body has a cavity formed inside for the micro-blood collection tube to enter; It is characterized in that The invention also comprises a peripheral structure with a motion unit inside, wherein the upper and lower end surfaces of the peripheral structure are open structures, the motion unit is in contact with the inner wall of the cylinder, the motion unit divides the inside of the peripheral structure into a plurality of mutually independent areas, and the areas are located in the middle area or the area near the lower end of the peripheral structure, the motion unit is configured such that after the body seals the second opening of the peripheral structure, it moves in the peripheral structure to reduce the pressure in the area where the micro-blood collection tube is located, the body is provided with a suction air channel connected with the inside of the peripheral structure, and the movement of the motion unit reduces the pressure inside the body; the body is a tubular structure with a bottom, the body has a cavity with a first opening upward, the first opening is adapted to the outer diameter of the micro-blood collection tube, and after the micro-blood collection tube enters the cavity, the first opening constrains the micro-blood collection tube to remain in an upright position; the motion unit is in contact with a whole circle of the inner wall of the peripheral structure, and is located in the middle area of ​​the peripheral structure or the area near the bottom end, and the body is separated from the peripheral structure.

2. A peripheral blood collection tube according to claim 1, characterized in that: The main body includes a plug part and a blood collection tube. A second opening is arranged on one end of the plug part facing away from the motion unit. The first opening is located on the plug part. The plug part covers the second opening. The air extraction channel is located on the plug part.

3. A peripheral blood collection tube according to claim 1, characterized in that: It also includes an adjusting rod. An adjusting channel passing through the air extraction channel is arranged in the plug part. The adjusting channel extends to the surface of the plug part. The adjusting rod enters from the adjusting channel to intercept the air flow in the air extraction channel.

4. A peripheral blood collection tube according to claim 1, characterized in that: A cover cap is also provided on the plug, the central area of ​​the plug surface is an ejection area extending upward, the cover cap has a shape adapted to the ejection area, the first opening is located in the ejection area, and the cover plate can close the ejection area.

5. A peripheral blood collection tube according to claim 2, characterized in that: The motion unit includes a spring, a piston rod and a piston handle formed below the piston rod. The piston rod contacts the inner wall of the peripheral structure, dividing the interior of the peripheral structure into upper and lower areas. The spring is fixed above the piston rod, and one end of the spring is kept opposite to the blood collection tube.

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