Blood coagulation tube capable of changing blood sampling amount

Abstract

The blood coagulation tube capable of changing the blood sampling amount comprises a tube body and an isolation sleeve, the isolation sleeve is fixedly arranged in the tube body, liquid drainage holes are integrally formed in the left side and the right side of the lower end in the isolation sleeve, and a driving assembly is arranged outside the tube body. Through the design of an adjusting function, when the negative pressure in the pipe body is insufficient, the rotating sleeve is rotated to control the liquid discharging pipe to rotate, so that the sliding plate moves in the direction of the isolation sleeve, gas in the pipe body is discharged to the outside, the negative pressure in the pipe body is adjusted, and the negative pressure in the pipe body is adjusted. And finally, the blood sampling amount is controlled in a range required by medical staff. Through the design of a flow stopping function, external gas can be prevented from being discharged into the tube body through the connector, the stability of the tube body after negative pressure adjustment is ensured, in addition, through the design of liquid flow stopping, collected blood in the tube body can be prevented from being discharged to the outside through the connector, and the stable effect of the tube body after blood collection is ensured.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a coagulation vessel that can change the amount of blood collected. Background Technology

[0002] The principle of blood collection tubes is to pre-vacuum the capped blood collection tube, using the negative pressure to automatically and quantitatively collect venous blood samples. One end of the lancet is inserted into a vein, and the other end is inserted into the rubber stopper of the vacuum blood collection tube. The venous blood, inside the vacuum blood collection tube, is drawn into the sample container under negative pressure through the lancet. Multiple collections can be achieved with a single venipuncture without leakage. The inner volume of the lancet is very small, so its impact on the collected blood volume is negligible, but the probability of backflow is relatively low. If the inner volume were larger, it would consume some of the vacuum in the blood collection tube, thus reducing the collected volume.

[0003] The patent published under announcement number "CN109998561A" is titled "Disposable Vacuum Blood Collection Tube for Coagulation." In this disclosed device, the negative pressure inside the blood collection tube is constant, resulting in a constant blood collection volume. However, when medical personnel use a butterfly needle to collect blood, the cavity at the front of the needle leads to insufficient negative pressure in the blood collection tube, resulting in insufficient blood collection and affecting the results. When medical personnel collect blood from patients with anemia and hypererythrocyte sedimentation rate (HCT), these patients often have hematocrit values ​​exceeding the normal range, causing a corresponding increase or decrease in plasma volume and leading to significant errors in the test results. Based on this, this utility model designs a coagulation tube that can adjust the blood collection volume to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a coagulation vessel that can change the blood collection volume, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coagulation vessel with adjustable blood collection volume, comprising a tube body and an isolation sleeve, wherein the isolation sleeve is fixed inside the tube body, and drainage holes are integrally provided on the left and right sides of the lower end of the isolation sleeve. A driving assembly is provided outside the tube body, the driving assembly including a rotating sleeve that is adapted to the upper end of the tube body. A support plate is fixedly provided on the upper end of the rotating sleeve, and a drainage pipe is fixedly provided inside the support plate. A clearance hole is integrally provided on the left and right sides of the lower end of the drainage pipe. A sealing plug is adapted to the upper end of the drainage pipe. A one-way valve is fixedly provided on the lower end of the drainage pipe. Detachable connectors are fixedly inserted on the left and right sides of the upper end of the tube body. A sliding plate is threaded on the outside of the drainage pipe, and the outer wall of the sliding plate is slidably connected to the inner wall of the isolation sleeve.

[0006] Furthermore, both the drain hole and the clearance hole are through holes, the axis of the drain hole and the axis of the clearance hole are coaxial, the top view cross-section of the support plate is circular, and the diameter of the support plate is the same as the outer diameter of the pipe body.

[0007] Furthermore, the bottom surface of the drain pipe is designed to fit tightly against the inner bottom surface of the pipe body, and the support plate is made of rubber, with the bottom surface of the support plate fitting tightly against the top surface of the pipe body and the top surface of the isolation sleeve.

[0008] Furthermore, the one-way valve is located at the upper end of the relief hole, and the distance between the one-way valve and the relief hole is five millimeters.

[0009] Furthermore, a waterproof and breathable membrane is fixedly installed inside the connector, and a check valve is fixedly connected to the connector on the outside of the waterproof and breathable membrane.

[0010] Furthermore, the connector is located at the lower end of the rotating sleeve, and the distance between the top of the connector and the bottom of the rotating sleeve is two centimeters.

[0011] Furthermore, the rotating sleeve is threaded with a sealing cap, and the distance between the bottom surface of the sealing cap and the bottom surface of the rotating sleeve is two centimeters.

[0012] Furthermore, the axes of the tube body, the isolation sleeve, and the drain pipe are designed to be coaxial, and the center of the support plate is concentric with the center of the tube body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, through the design of the adjustment function, when the negative pressure inside the tube is insufficient, controls the rotation of the drain tube by rotating the rotating sleeve, thereby causing the slide to move along the direction of the isolation sleeve, and thus expelling the gas inside the tube to the outside, thereby adjusting the negative pressure inside the tube. It can be seen that by using the device in this application, the blood collection volume can be controlled within the range required by medical personnel.

[0015] 2. This utility model, through its flow-stopping design, prevents external gas from entering the tube body through the connector, ensuring the stability of the tube body after negative pressure adjustment. In addition, through its liquid flow-blocking design, it prevents the collected blood inside the tube body from being discharged to the outside through the connector. Thus, by using the device in this application, the stability of the tube body after blood collection is ensured. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a frontal perspective three-dimensional view of a coagulation vessel with adjustable blood collection volume according to this utility model;

[0018] Figure 2 This is a three-dimensional view of the internal structure of a coagulation vessel with adjustable blood collection volume according to this utility model.

[0019] Figure 3 An exploded perspective view of the pipe body and the isolation sleeve;

[0020] Figure 4 An exploded 3D view of the support plate and the drain pipe;

[0021] Figure 5 This is a magnified 3D view of the connector's interior.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1-Pipe body, 2-Isolation sleeve, 3-Drain hole, 4-Drive assembly, 401-Rotating sleeve, 402-Support plate, 403-Drain pipe, 404-Displacement hole, 405-Sealing plug, 406-One-way valve, 407-Connector, 408-Slide plate, 5-Waterproof and breathable membrane, 6-Check valve, 7-Sealing cap. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the device includes a tube body 1 and an isolation sleeve 2. The isolation sleeve 2 is fixed inside the tube body 1. Drainage holes 3 are integrally provided on the left and right sides of the lower end of the isolation sleeve 2. A drive assembly 4 is provided outside the tube body 1. The drive assembly 4 includes a rotating sleeve 401 that is connected to the upper end of the tube body 1. A support plate 402 is fixed inside the upper end of the rotating sleeve 401. A drain pipe 403 is fixed inside the support plate 402. A clearance hole 404 is integrally provided on the left and right sides of the lower end of the drain pipe 403. A sealing plug 405 is connected to the upper end of the drain pipe 403. A one-way valve 406 is fixed inside the lower end of the drain pipe 403. A detachable connector 407 is fixedly passed through the left and right sides of the upper end of the tube body 1. A sliding plate 408 is threaded on the outside of the drain pipe 403. The outer wall of the sliding plate 408 is slidably connected to the inner wall of the isolation sleeve 2.

[0027] Both the drain hole 3 and the clearance hole 404 are through holes. The axis of the drain hole 3 and the axis of the clearance hole 404 are coaxial. The top view cross-section of the support plate 402 is circular, and the diameter of the support plate 402 is the same as the outer diameter of the pipe body 1. The bottom surface of the drain pipe 403 is in close contact with the inner bottom surface of the pipe body 1. The support plate 402 is made of rubber, and the bottom surface of the support plate 402 is in close contact with the top surface of the pipe body 1 and the top surface of the isolation sleeve 2. The one-way valve 406 is located at the upper end of the clearance hole 404, and the distance between the one-way valve 406 and the clearance hole 404 is five millimeters.

[0028] The operator first manually rotates the rotating sleeve 401 clockwise, causing the rotating sleeve 401 to rotate the support plate 402 along with the drain pipe 403. Through the threaded transmission between the drain pipe 403 and the sliding plate 408, the sliding plate 408 moves downward along the direction of the isolation sleeve 2. At this time, the sliding plate 408 discharges the gas between the drain pipe 403 and the isolation sleeve 2, as well as the gas at the lower end of the drain pipe 403, through the relief hole 404 and the drain hole 3 into the position between the isolation sleeve 2 and the tube body 1. The gas discharged into the space between the tube body 1 and the isolation sleeve 2 is then discharged to the outside through the connector 407. In this way, the negative pressure inside the tube body 1 is adjusted. The operator then inserts the blood collection needle through the sealing plug 405. Through the negative pressure inside the tube body 1, the patient's blood is drawn from the drain pipe 403 into the tube body 1. In addition, the design of the one-way valve 406 prevents the blood inside the tube body 1 from being discharged to the outside through the drain pipe 403.

[0029] Example 2

[0030] like Figure 2 , Figure 5As shown, a waterproof and breathable membrane 5 is fixedly installed inside the connector 407. A check valve 6 is fixedly connected to the connector 407 on the outside of the waterproof and breathable membrane 5. The connector 407 is located at the lower end of the rotating sleeve 401. The distance between the top of the connector 407 and the bottom of the rotating sleeve 401 is two centimeters. A sealing cover 7 is threaded on the outside of the rotating sleeve 401. The distance between the bottom surface of the sealing cover 7 and the bottom surface of the rotating sleeve 401 is two centimeters. The axes of the pipe body 1, the isolation sleeve 2, and the drain pipe 403 are designed to be coaxial. The center of the support plate 402 and the center of the pipe body 1 are designed to be concentric.

[0031] According to the operation method in Example 1, when the negative pressure inside the tube 1 draws blood, the waterproof and breathable membrane 5 can prevent blood from being discharged to the outside through the connector 407, ensuring the stable effect of blood collection in the tube 1. In addition, the design of the check valve 6 can prevent external gas from entering the tube 1 through the connector 407, ensuring the negative pressure effect inside the tube 1. After the blood collection is completed, the medical staff connects the sealing cap 7 to the rotating sleeve 401 by means of threaded connection, which improves the sealing effect of the device after blood collection. The medical staff then send the device to the testing area for subsequent testing of the blood inside the tube 1.

Claims

1. A blood collection tube capable of changing the amount of blood, comprising a tube body (1) and a separation sleeve (2), characterized in that: The isolating sleeve (2) is fixedly arranged in the pipe body (1), and the isolating sleeve (2) is integrally provided with a drainage hole (3) at the lower end of the left and right sides in the inside, the pipe body (1) is provided with a driving assembly (4) outside, the driving assembly (4) comprises a rotating sleeve (401) connected to the upper end outside of the pipe body (1), the rotating sleeve (401) is fixedly provided with a supporting plate (402) at the upper end inside, the supporting plate (402) is fixedly provided with a drainage pipe (403) inside, the drainage pipe (403) is integrally provided with a clearance hole (404) at the lower end of the left and right sides inside, the drainage pipe (403) is connected with a sealing plug (405) at the upper end inside, the drainage pipe (403) is fixedly provided with a one-way valve (406) at the lower end inside, the pipe body (1) is fixedly penetrated with a detachable connector (407) at the upper end of the left and right sides outside, the drainage pipe (403) is externally threaded with a sliding plate (408), and the outer wall of the sliding plate (408) is slidably connected with the inner wall of the isolating sleeve (2).

2. The blood collection tube of claim 1, wherein: The drainage hole (3) and the clearance hole (404) are both designed as through holes, the axis of the drainage hole (3) is coaxial with the axis of the clearance hole (404), the supporting plate (402) has a circular top view cross section, and the diameter of the supporting plate (402) is equal to the outer diameter of the pipe body (1).

3. The blood collection tube of claim 1, wherein: The bottom surface of the drainage pipe (403) is tightly attached to the inner bottom surface of the pipe body (1), the supporting plate (402) is made of rubber, and the bottom surface of the supporting plate (402) is tightly attached to the top surface of the pipe body (1) and the top surface of the isolating sleeve (2).

4. The blood collection tube of claim 1, wherein: The one-way valve (406) is arranged at the upper end of the clearance hole (404), and the distance between the one-way valve (406) and the clearance hole (404) is 5 mm.

5. The blood collection tube of claim 1, wherein: The connector (407) is fixedly provided with a waterproof breathable membrane (5) inside, and a check valve (6) arranged outside the waterproof breathable membrane (5) is fixedly connected with the connector (407).

6. The blood collection tube of claim 1, wherein: The connector (407) is arranged at the lower end of the rotating sleeve (401), and the distance between the top of the connector (407) and the bottom of the rotating sleeve (401) is 2 cm.

7. The blood collection tube of claim 1, wherein: The rotating sleeve (401) is externally threaded with a sealing cover (7), and the distance between the bottom surface of the sealing cover (7) and the bottom surface of the rotating sleeve (401) is 2 cm.

8. The blood collection tube of claim 1, wherein: The axes of the pipe body (1), the isolating sleeve (2) and the drainage pipe (403) are coaxial, and the center of the supporting plate (402) is concentric with the center of the pipe body (1).

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