Improved vacuum blood collection tube

Abstract

The utility model discloses an improved vacuum blood collection tube which comprises a tube body and a sealing cover, a sealing plug is arranged in the sealing cover, a spacer is fixedly connected to an inner cavity of the tube body, a sealing rod is fixedly connected to the bottom of the spacer, a positioning ring is fixedly connected to the upper end face of the sealing cover, a first sealing piece is arranged on the upper end face of the sealing cover, and a second sealing piece is arranged on the lower end face of the sealing cover. A sealing protrusion is fixedly connected to the wall of the sealing cover, a second sealing piece is arranged in the sealing plug, and a limiting groove is formed in the outer portion of the sealing plug. When the blood collection tube is used, the connector drives the sealing plug to move downwards, the position of the limiting groove corresponds to the position of the sealing protrusion, meanwhile, the closed end is in contact with the upper end face of the tube body, the tube body achieves a better sealing effect, after blood collection is completed, the sealing protrusion extrudes the limiting groove, the sealing effect of the position of the original second sealing piece is better, and the sealing effect is better. Meanwhile, the blood collection tubes can be stacked together, so that an inspector can find a plurality of blood collection samples of the same person more easily.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an improved vacuum blood collection tube. Background Art

[0002] Vacuum blood collection tube is a kind of vacuum negative pressure blood collection tube, which uses vacuum negative pressure to suck the blood in the patient's blood vessels into the vacuum blood collection tube, thus completing the blood collection process. Vacuum blood collection tube is one of the most commonly used medical devices for blood collection and blood testing.

[0003] Application No. CN202321426499.3 discloses a precise quantitative blood collection tube, comprising a tube body and a tube cover, a rubber plug for sealing the tube body is arranged in the tube cover, a channel is arranged at the lower middle part of the rubber plug, a vacuum chamber is arranged on the side of the channel, an elastic membrane is sealed at the bottom end of the vacuum chamber, a containing cavity is also arranged on the side of the channel, a spring is installed on one side of the containing cavity, a sealing piece is fixedly connected to one end of the spring, a slide groove is arranged on the bottom central axis of the sealing piece, a transmission rod assembly is arranged between the slide groove and the elastic membrane for linkage, a guide hole is opened on the rubber plug between the containing cavity and the channel, a hollow is arranged below the guide hole, a groove flush with the guide hole is arranged on the inner wall of the channel, a vacuum chamber and a containing cavity are arranged in the rubber plug, an elastic membrane is arranged at the bottom of the vacuum chamber, a spring and a sealing piece are arranged in the containing cavity, and the sealing piece is connected to the elastic membrane through the transmission rod assembly. There is a negative pressure state inside the blood collection tube. According to the ideal gas state equation PV=nRT, when the lumen is sealed and the temperature does not change much, the pressure P and volume V are proportional. After the blood enters the blood collection tube, the air volume decreases and the pressure increases. This increase is directly related to the amount of blood. The change in lumen pressure is transmitted to the newly added air chamber, causing the elastic membrane to deform, thereby triggering the transmission rod assembly, causing the sealing piece to pop out, blocking the blood, and achieving the purpose of accurately controlling the amount of blood collected.

[0004] However, during the blood collection process, after the connector of the blood collection needle is pulled out, the blood collection tube can only be sealed by relying on the characteristics of the elastic body itself, resulting in poor sealing effect of the blood collection tube after the blood collection is completed. At the same time, existing patients need to collect more than one tube of blood when drawing blood. Although identification labels are attached to the outer walls of the blood collection tubes of multiple blood collection tubes, after the blood collection tubes are mixed with the blood collection tubes of other patients, medical staff still have to find several blood collection tubes corresponding to the patient on the test tube rack, which affects the work efficiency of the testers. Utility Model Content

[0005] The utility model aims to provide an improved vacuum blood collection tube, comprising a tube body and a sealing cover, wherein a sealing plug is arranged inside the sealing cover, a diaphragm is fixedly connected to the inner cavity of the tube body, a sealing rod is fixedly connected to the bottom of the diaphragm, a positioning ring is fixedly connected to the upper end surface of the sealing cover, a first sealing sheet is arranged on the upper end surface of the sealing cover, a sealing protrusion is fixedly connected to the wall of the sealing cover, a second sealing sheet is arranged inside the sealing plug, and a limiting groove is arranged outside the sealing plug.

[0006] As a further preference, the bottom of the sealing rod is flush with the bottom of the tube body, a boss is provided on the upper end surface of the sealing cover, the positioning ring is provided outside the boss, and the first sealing sheet is provided on the upper end surface of the boss.

[0007] As a further preference, the outer diameter of the positioning ring is equal to the inner diameter of the tube body.

[0008] As a further preference, the sealing plug is arranged at the top of the inner cavity of the sealing cover, and the first sealing sheet is aligned with the second sealing sheet in the vertical direction.

[0009] As a further preference, the sealing plug includes a closed end and a clamping end, the limiting groove is opened outside the closed end, the outer diameter of the closed end and the outer diameter of the tube body are both equal to the inner diameter of the sealing cover, and the inner diameter of the clamping end is equal to the inner diameter of the tube body.

[0010] As a further advantage, the depth of the limiting groove is smaller than the protruding height of the sealing protrusion.

[0011] Through the above technical solution, the beneficial effects of the utility model are:

[0012] The utility model provides a sealing plug inside the sealing cover, wherein the sealing plug includes a closed end and a clamping end. When the sealing plug is at the top of the inner cavity of the sealing cover, the sealing protrusion squeezes the outer bottom of the closed end. During the process of inserting the connecting head into the sealing cover and the sealing plug, the connecting head will drive the sealing plug to move downward, so that the position of the limiting groove corresponds to the position of the sealing protrusion. At the same time, the closed end will contact the upper end surface of the tube body, and the upper chamber of the tube body will be sealed by the sealing cover and the sealing plug, so that the tube body can achieve a better sealing effect. After blood collection is completed, the sealing protrusion will squeeze the limiting groove, so that the sealing effect of the original position of the second sealing sheet is better. At the same time, a positioning ring is provided above the sealing cover, and the tube body can be sleeved on the outside of the positioning ring, so that a plurality of blood collection tubes can be connected in sequence, that is, a plurality of groups of blood collected by one person can be stacked together, so that the inspector can find multiple blood collection samples of the same person more easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the improved vacuum blood collection tube of the utility model;

[0014] Figure 2It is an exploded view of the improved vacuum blood collection tube of the utility model;

[0015] Figure 3 This is a schematic cross-sectional view of the improved vacuum blood collection tube of the utility model;

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the sealing cover and the sealing plug of the utility model;

[0017] Figure 5 It is a schematic diagram of the stacked structure of the improved vacuum blood collection tube of the utility model.

[0018] In the figure: 1 tube body, 11 spacer, 12 sealing rod, 2 sealing cover, 21 positioning ring, 22 first sealing sheet, 23 sealing protrusion, 3 sealing plug, 31 limiting groove, 32 second sealing sheet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-5 As shown, the utility model provides an improved vacuum blood collection tube, comprising a tube body 1 and a sealing cover 2, a sealing plug 3 is arranged inside the sealing cover 2, a diaphragm 11 is fixedly connected to the inner cavity of the tube body 1, a sealing rod 12 is fixedly connected to the bottom of the diaphragm 11, a positioning ring 21 is fixedly connected to the upper end surface of the sealing cover 2, a first sealing sheet 22 is arranged on the upper end surface of the sealing cover 2, a sealing protrusion 23 is fixedly connected to the wall of the sealing cover 2, a second sealing sheet 32 ​​is arranged inside the sealing plug 3, and a limiting groove 31 is provided on the outside of the sealing plug 3.

[0021] Specifically, the septum 11 divides the inner cavity of the tube body 1 into an upper chamber and a lower chamber, wherein the upper chamber is used to store the collected blood.

[0022] It should be noted that the spacer 11 and the tube body 1 are integrally formed.

[0023] Furthermore, the bottom of the sealing rod 12 is flush with the bottom of the tube body 1, a boss is provided on the upper end surface of the sealing cover 2, a positioning ring 21 is provided outside the boss, and a first sealing sheet 22 is provided on the upper end surface of the boss.

[0024] Furthermore, the outer diameter of the positioning ring 21 is equal to the inner diameter of the tube body 1 .

[0025] Specifically, the tube body 1 can be sleeved on the outside of the positioning ring 21, so that several blood collection tubes can be connected in sequence, that is, several groups of blood collected by one person can be stacked together, making it easier for testers to find multiple blood collection samples from the same person.

[0026] It is understandable that when the blood collection tubes are stacked, the sealing rod 12 will be inserted into the first sealing sheet 22.

[0027] Furthermore, the sealing plug 3 is arranged at the top of the inner cavity of the sealing cover 2, and the first sealing sheet 22 and the second sealing sheet 32 ​​are aligned in the vertical direction.

[0028] Furthermore, the sealing plug 3 includes a closed end and a clamping end, the limiting groove 31 is opened outside the closed end, the outer diameter of the closed end and the outer diameter of the tube body 1 are equal to the inner diameter of the sealing cover 2, and the inner diameter of the clamping end is equal to the inner diameter of the tube body 1.

[0029] It is understandable that when the blood collection tube is not in use, the sealing plug 3 is at the top of the inner cavity of the sealing cover 2 , and during use, the connector of the blood collection needle will pass through the sealing cover 2 and the sealing plug 3 into the tube body 1 .

[0030] The blood collection needle is connected to a connector through a hose, and when the sealing plug 3 is at the top of the inner cavity of the sealing cover 2, the sealing protrusion 23 squeezes the outer part of the closed end.

[0031] Specifically, during the process of inserting the connector into the sealing cover 2 and the sealing plug 3, the connector will drive the sealing plug 3 to move downward so that the position of the limiting groove 31 corresponds to the position of the sealing protrusion 23. At the same time, the closed end will contact the upper end surface of the tube body 1, and the upper chamber of the tube body 1 will be closed by the sealing cover 2 and the sealing plug 3, so that the tube body 1 can achieve a better sealing effect.

[0032] Furthermore, the depth of the limiting groove 31 is smaller than the protruding height of the sealing protrusion 23 .

[0033] Specifically, after the blood collection is completed and the connector of the blood collection needle is pulled out, the sealing protrusion 23 will squeeze the limiting groove 31, so that the sealing plug 3 can obtain a better sealing effect.

[0034] Working principle: When drawing blood, insert the blood collection needle into the patient's blood vessel, and then insert the connecting head of the blood collection needle through the first sealing sheet 22 and the second sealing sheet 32 ​​into the interior of the tube body 1. During this process, the sealing plug 3 moves down to the position of the limiting groove 31 corresponding to the position of the sealing protrusion 23, and the closed end will contact the upper end surface of the tube body 1. After the blood collection is completed, pull out the connecting head.

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An improved vacuum blood collection tube, characterized in that: The invention comprises a tube body (1) and a sealing cover (2), wherein a sealing plug (3) is arranged inside the sealing cover (2), a diaphragm (11) is fixedly connected to the inner cavity of the tube body (1), a sealing rod (12) is fixedly connected to the bottom of the diaphragm (11), a positioning ring (21) is fixedly connected to the upper end surface of the sealing cover (2), a first sealing sheet (22) is arranged on the upper end surface of the sealing cover (2), a sealing protrusion (23) is fixedly connected to the wall of the sealing cover (2), a second sealing sheet (32) is arranged inside the sealing plug (3), and a limiting groove (31) is provided on the outside of the sealing plug (3).

2. The improved vacuum blood collection tube according to claim 1, characterized in that: The bottom of the sealing rod (12) is flush with the bottom of the tube body (1); the upper end surface of the sealing cover (2) is provided with a boss; the positioning ring (21) is arranged outside the boss; and the first sealing sheet (22) is arranged on the upper end surface of the boss.

3. The improved vacuum blood collection tube according to claim 2, characterized in that: The outer diameter of the positioning ring (21) is equal to the inner diameter of the tube body (1).

4. The improved vacuum blood collection tube according to claim 1, characterized in that: The sealing plug (3) is arranged at the top of the inner cavity of the sealing cover (2), and the first sealing sheet (22) and the second sealing sheet (32) are aligned in the vertical direction.

5. The improved vacuum blood collection tube according to claim 1, characterized in that: The sealing plug (3) comprises a closed end and a clamping end, the limiting groove (31) is arranged outside the closed end, the outer diameter of the closed end and the outer diameter of the tube body (1) are both equal to the inner diameter of the sealing cover (2), and the inner diameter of the clamping end is equal to the inner diameter of the tube body (1).

6. The improved vacuum blood collection tube according to claim 1, characterized in that: The depth of the limiting groove (31) is less than the protruding height of the sealing protrusion (23).

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