Quantitative extraction blood drawing tube

Abstract

The utility model discloses a quantitative extraction blood drawing tube which comprises a tube bottle, a tube cover is connected to the upper end of the tube bottle in a threaded mode, a negative pressure extraction opening is formed in the bottom of the tube bottle, an extraction hard tube is arranged on the tube cover in a sliding and penetrating mode, a connecting opening is formed in the upper end of the extraction hard tube, and a piston piece is arranged in the tube bottle in a sealed and sliding mode. The extraction hard tube extends to the tube bottle and is coaxially and fixedly connected with the piston piece, the piston piece is provided with a communication opening corresponding to the extraction hard tube in position, the extraction hard tube is sleeved with a rotating block in a threaded mode, and the rotating block is coaxially and rotationally connected with the upper end face of the tube cover. The negative pressure blood drawing principle is adopted, the position of the piston piece in the tube bottle can be adjusted by rotating the rotating block before blood drawing, so that the volume of the tube bottle is changed, quantitative negative pressure blood drawing operation is carried out according to requirements, and the whole negative pressure blood drawing device is convenient to operate and use.

Description

Technical Field

[0001] The utility model relates to the technical field related to medical devices, in particular to a quantitative extraction blood tube. Background Art

[0002] A negative pressure blood draw is a medical device used to collect venous blood from the human body. Using negative pressure to draw venous blood can reduce the incision of blood drawing and alleviate the pain of the person being drawn. The present scheme specifically relates to a negative pressure blood draw. When using existing negative pressure blood draws, a vacuum is drawn inside the blood draw in advance, and the negative pressure formed is stable and cannot be adjusted. Therefore, the amount of blood drawn depends on the volume of the blood draw. During the blood drawing process, the amount of blood drawn cannot be accurately controlled. The amount of blood drawn can only be visually estimated by medical staff, and because the amount of blood drawn must be guaranteed, generally during the blood drawing process, more blood will be drawn as much as possible to avoid a secondary blood drawing operation, which can easily cause pain to the person being drawn. Therefore, a blood draw that can quantitatively draw blood is needed.

[0003] Therefore, we propose a quantitative extraction blood collection tube to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a quantitative extraction blood collection tube.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A quantitative blood extraction tube comprises a tube bottle, the upper end of the tube bottle is threadedly connected to a tube cover, the bottom of the tube bottle is provided with a negative pressure extraction port, an extraction hard tube is slidably penetrated on the tube cover, a connecting port is provided on the upper end of the extraction hard tube, a piston plate is sealingly and slidably provided inside the tube bottle, the extraction hard tube extends to the tube bottle and is coaxially fixedly connected with the piston plate, the piston plate is provided with a connecting port corresponding to the position of the extraction hard tube, a rotating block is threadedly sleeved on the extraction hard tube, and the rotating block is coaxially rotatably connected to the upper end face of the tube cover.

[0007] Preferably, the vial is made of transparent plastic material, and scale marks are provided on the outer wall of the vial.

[0008] Preferably, a circular groove is provided at the bottom of the tube bottle corresponding to the negative pressure extraction port.

[0009] Preferably, two arc-shaped blocks are symmetrically and fixedly arranged on the tube cover, and a plurality of anti-slip grooves are correspondingly arranged on the tube cover and the two arc-shaped blocks.

[0010] Preferably, the cross-section of the communication port is arranged in a herringbone shape, and a sealing float is arranged in the communication port.

[0011] Preferably, a plastic seal is fixedly disposed inside the connection port.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the blood drawing tube also adopts the existing negative pressure blood drawing principle, and can quantitatively limit the amount of blood drawn, reducing the workload of medical staff and allowing patients to operate conveniently; the device can control the position of the piston in the tube bottle by rotating the rotating block, thereby changing the volume in the tube bottle, and the negative pressure drawing operation is performed in advance through the negative pressure drawing port in the tube bottle, and the conventional blood drawing operation is performed through the connecting port on the extraction hard tube. After the blood is drawn into the tube bottle until it is completely filled, the blood drawing operation will be stopped, thereby realizing the quantitative blood drawing operation, and the quantification of the blood drawing amount is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a three-dimensional structural schematic diagram of another viewing angle of the utility model;

[0015] Figure 3 It is a cross-sectional structural schematic diagram of the utility model.

[0016] In the figure:

[0017] 1 tube bottle, 2 tube cover, 3 negative pressure port, 4 extraction hard tube, 5 connection port, 6 piston piece, 7 rotating block, 8 arc block, 9 sealing float. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-3 A quantitative extraction blood collection tube is shown, comprising:

[0020] A tube bottle 1 is used as a blood drawing container, and a tube cap 2 is threadedly connected to the upper end of the tube bottle 1. When drawing blood, the tube cap 2 can be unscrewed to draw blood. A negative pressure extraction port 3 is provided at the bottom of the tube bottle 1, and a negative pressure extraction operation can be performed on the inside of the tube bottle 1. The existing technology is adopted and will not be described in detail here;

[0021] The difference from the existing negative pressure blood drawing tube is that an extraction hard tube 4 is slidably provided on the tube cover 2, wherein a slider slide groove structure can be provided between the extraction hard tube 4 and the tube cover 2 to limit rotation, and a connecting port 5 is provided at the upper end of the extraction hard tube 4, and a plastic seal is fixedly provided in the connecting port 5, which is the same as the existing negative pressure blood drawing tube structure; a piston plate 6 is sealingly slidably provided in the tube bottle 1 corresponding to the extraction hard tube 4, the extraction hard tube 4 extends to the tube bottle 1 and is coaxially fixedly connected to the piston plate 6, and a connecting port corresponding to the position of the extraction hard tube 4 is provided on the piston plate 6, and blood can enter between the piston plate 6 and the bottom of the tube bottle 1 through the extraction hard tube 4, and the piston plate 6 can move to change the volume of the tube bottle 1, thereby realizing the operation of quantitatively drawing blood in advance;

[0022] In order to conveniently and accurately move the piston plate 6, a rotating block 7 is threadedly sleeved on the extraction hard tube 4. The rotating block 7 is coaxially rotatably connected to the upper end surface of the tube cover 2. By rotating the rotating block 7, the piston plate 6 can be driven to move accurately.

[0023] In order to facilitate observation of blood drawing, the vial 1 is made of transparent plastic material, and scale marks are provided on the outer wall of the vial 1 to assist quantitative operation.

[0024] In order to ensure that the tube bottle 1 can be placed vertically, a circular groove is provided at the bottom of the tube bottle 1 corresponding to the negative pressure extraction port 3.

[0025] In order to facilitate the rotation of the pipe cover 2 and to provide a certain degree of protection for the extracted hard pipe 4, two arc blocks 8 are symmetrically fixedly arranged on the pipe cover 2, and a number of anti-slip grooves are correspondingly arranged on the pipe cover 2 and the two arc blocks 8.

[0026] The cross-section of the connecting port is set to a herringbone shape, and a sealing float 9 is arranged in the connecting port. The diameter of the sealing float 9 is larger than the inner diameter of the two outlets of the connecting port and the extraction hard tube 4. The sealing float 9 will not block any two of the two outlets of the connecting port and the extraction hard tube 4 at the same time. When the blood fills the bottle 1, the sealing float 9 will float up, allowing the sealing float 9 to block the extraction hard tube 4, thereby sealing and stopping the extraction of blood.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A quantitative extraction blood collection tube, characterized in that: The invention comprises a tube bottle (1), the upper end of which is threadedly connected to a tube cover (2), the bottom of which is provided with a negative pressure extraction port (3), an extraction hard tube (4) slidingly penetrated on the tube cover (2), the upper end of which is provided with a connection port (5), a piston plate (6) sealingly and slidingly provided inside the tube bottle (1), the extraction hard tube (4) extending to the tube bottle (1) and coaxially fixedly connected to the piston plate (6), the piston plate (6) being provided with a communication port corresponding to the position of the extraction hard tube (4), a rotating block (7) threadedly sleeved on the extraction hard tube (4), and the rotating block (7) being coaxially rotatably connected to the upper end surface of the tube cover (2).

2. A quantitative extraction blood collection tube according to claim 1, characterized in that: The tube bottle (1) is made of transparent plastic material, and scale marks are arranged on the outer wall of the tube bottle (1).

3. A quantitative extraction blood collection tube according to claim 1, characterized in that: The bottom of the tube bottle (1) is provided with a circular groove corresponding to the negative pressure extraction port (3).

4. A quantitative extraction blood collection tube according to claim 1, characterized in that: Two arc-shaped blocks (8) are symmetrically fixedly arranged on the pipe cover (2), and a plurality of anti-slip grooves are correspondingly arranged on the pipe cover (2) and the two arc-shaped blocks (8).

5. A quantitative extraction blood collection tube according to claim 1, characterized in that: The cross section of the communication port is arranged in a herringbone shape, and a sealing float (9) is arranged in the communication port.

6. A quantitative extraction blood collection tube according to claim 1, characterized in that: A plastic seal is fixedly arranged inside the connecting port (5).

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