A micro blood collection tube for children suitable for capillary blood sampling method

Abstract

The technical solution of the present invention is a micro blood collection tube for children suitable for capillary blood collection method, which includes a tube body, a tube cap and a rubber stopper. The tube cap is covered on the tube body and is hermetically sealed by interference fit extrusion at the contact position between the two. A rubber stopper installation hole penetrating up and down is provided in the middle of the tube cap. The rubber stopper is installed in the rubber stopper installation hole. A clamping mechanism for clamping and positioning the two is provided between the rubber stopper and the rubber stopper installation hole. A cut penetrating the upper and lower surfaces is provided on the rubber stopper. The structure of the present invention is concise, and the blood collection effect is good. It is not necessary to open the tube cap during blood collection and later detection, which can avoid the risk of bringing in pollutants due to the operation of opening the tube cap.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a micro blood collection tube for children suitable for capillary blood collection method. Background Art

[0002] Recently, with the continuous development of medical technology, the technology of diagnosing various diseases through blood tests has been quite developed. Therefore, blood tests are usually required when diagnosing various diseases. Blood collection for adults is usually completed using vacuum blood collection tubes. In the blood collection for routine blood tests of infants and young children, due to the particularity of their blood vessels and blood cells, it is difficult to collect venous blood for blood cytology examination. Moreover, due to the negative pressure of the vacuum tube, it is easy to cause the rupture of blood cells in infants and young children, resulting in distorted test results. Therefore, many medical staff use the method of pricking the fingertip to bleed, squeezing the fingertip, and directly scraping the fingertip of the baby with the mouth of the blood collection tube to collect blood. This blood collection method will also damage blood cells and affect the test results.

[0003] Therefore, currently, capillary blood collection is usually used when collecting blood from children. Capillary blood collection mainly includes two methods: earlobe blood collection and fingertip blood collection. When collecting blood from the capillaries of infants and young children, generally, the inner side of the fingertip of the left middle finger or ring finger of the infant and young child is massaged first to make the local tissue congest naturally, and then the skin of the blood collection site is wiped with a 75% ethanol cotton ball and waited to dry. Then, the medical staff uses the left thumb and index finger to fix the blood collection site of the infant and young child to make the skin and subcutaneous tissue tense. The medical staff holds a disposable blood collection and disinfection needle in the right hand and quickly inserts it into the inner side of the fingertip abdomen, with a depth of 2 - 3 mm, and immediately withdraws the needle. After the blood flows out naturally, the first drop of blood is wiped off with a sterile dry cotton ball. When the blood flows out naturally, a disposable micro pipette is used to suck the blood and guide it into the blood collection tube for children to complete the process of blood collection from children.

[0004] The applicant has once improved the blood collection tube for children, such as the invention patent with the name of "Micro Blood Collection Tube for Children Supporting Automatic Labeling Detection System" and the application number of 2017200846828. However, when this blood collection tube is subsequently tested on the machine, the top cover needs to be opened, and there is a risk of introducing contaminants during the process of opening the top cover, which may affect the test results. Moreover, when collecting blood, the tube cap also needs to be opened, and there is also a risk of introducing contaminants, which may affect the test results. Summary of the Invention

[0005] In view of the above problems, the present invention aims to provide a micro blood collection tube for children suitable for capillary blood collection method, which has a simple structure, good blood collection effect, does not need to open the tube cap during blood collection and subsequent testing, and can avoid the risk of introducing contaminants due to the operation of opening the tube cap.

[0006] The technical solution of the present invention is a micro blood collection tube for children suitable for capillary blood collection method, which includes a tube body, a tube cap and a rubber stopper. The tube cap is covered on the tube body and is hermetically sealed by interference fit extrusion at the contact part between the two. A rubber stopper installation hole that penetrates up and down is provided in the middle of the tube cap, and the rubber stopper is installed in the rubber stopper installation hole. A clamping mechanism for clamping and positioning the two is provided between the rubber stopper and the rubber stopper installation hole, and a cut that penetrates the upper and lower surfaces is provided on the rubber stopper.

[0007] Preferably, a columnar limiting part is formed by the downward extension of the upper surface in the middle of the tube cap. An annular cavity for inserting the tube orifice of the tube body is formed between the columnar limiting part and the side wall of the tube cap, and the width of the annular cavity shows a shrinking trend from bottom to top.

[0008] Preferably, the clamping mechanism includes a columnar limiting part, an annular rib protruding inward at the upper end of the inner side surface of the columnar limiting part, and an annular groove correspondingly arranged on the outer surface of the rubber stopper. When the rubber stopper is installed in place, the annular rib is clamped in the annular groove to achieve clamping and positioning.

[0009] Preferably, a rubber stopper installation step is provided at the top of the tube cap. The top of the columnar limiting part extends downward from the inner side of the rubber stopper installation step, and the columnar limiting part gradually inclines inward when extending downward.

[0010] Preferably, the top of the rubber stopper is installed on the rubber stopper installation step. The lower part of the rubber stopper inclines inward and the inclination angle corresponds to the inclination angle of the columnar limiting part. A chamfer is provided at the bottom of the rubber stopper, and the length and width dimensions of the chamfer are between 0.2 - 0.5 mm.

[0011] Preferably, a plurality of triangular guiding blocks are evenly arranged on the outer side wall of the tube body and the inner side wall of the tube cap in the circumferential direction. When the tube cap is sleeved on the tube body, the triangular guiding blocks on the tube cap and the triangular guiding blocks on the tube body are staggered in sequence.

[0012] Preferably, a sealing partition layer is provided in the middle of the tube body, and the sealing partition layer divides the inside of the tube body into a blood collection part and a labeling part.

[0013] Preferably, an annular tube cap rib is provided at the lower end of the inner side wall of the tube cap, and an annular tube body rib is provided at the upper end of the outer side wall of the tube body. When the tube cap is sleeved on the tube body, the annular tube cap rib is located below the annular tube body rib.

[0014] Preferably, an annular protruding tube cap limiting ring is provided on the outer side wall at the upper end of the tube body. When the tube cap is sleeved on the tube body in place, the bottom surface of the tube cap is pressed on the tube cap limiting ring.

[0015] Preferably, the shape of the cut is cross-shaped or star-shaped.

[0016] The structure of the present invention is concise, and it has a good blood collection effect in combination with the capillary blood collection method. When collecting blood and during subsequent detection, it is not necessary to open the tube cap. When collecting blood, a disposable micropipette is directly inserted into the incision of the rubber stopper to enter the tube body, and the other end of the disposable micropipette is directly placed on the bleeding wound of the finger of an infant or child, enabling the direct realization of the blood collection process. When detecting, the sampling needle is directly inserted through the incision of the rubber stopper into the blood in the tube body, which can avoid the risk of introducing contaminants due to the operation of opening the tube cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an exploded view of the present invention;

[0018] Figure 2 is a top view of the present invention;

[0019] Figure 3 is a full cross-sectional view of the present invention;

[0020] Figure 4 is Figure 3 a partial enlarged view of part A in

[0021] Figure 5 is a full cross-sectional view when the rubber stopper of the present invention is pulled out;

[0022] Figure 6 is Figure 5 a partial enlarged view of part B in

[0023] Among them: 1 - tube body; 2 - tube cap; 3 - rubber stopper; 4 - rubber stopper installation hole; 5 - engaging mechanism; 6 - incision; 7 - columnar limiting part; 8 - annular cavity; 9 - annular rib; 10 - annular groove; 11 - rubber stopper installation step; 12 - chamfer; 13 - triangular guiding block; 14 - sealing interlayer; 15 - blood collection part; 16 - labeling part; 17 - annular tube cap rib; 18 - annular tube body rib; 19 - tube cap limiting ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] As Figures 1 to 6As shown in the figure, the present invention provides a micro blood collection tube for children suitable for capillary blood collection method, which includes a tube body 1, a tube cap 2 and a rubber stopper 3. The tube cap 2 is covered on the tube body 1 and is press-fitted and sealed by interference fit at the contact part between the two. A rubber stopper mounting hole 4 that penetrates up and down is provided in the middle of the tube cap 2. The rubber stopper 3 is installed in the rubber stopper mounting hole 4. A clamping mechanism 5 for clamping and positioning the two is provided between the rubber stopper 3 and the rubber stopper mounting hole 4. A notch 6 that penetrates the upper and lower surfaces is provided on the rubber stopper 3. The shape of the notch 6 can be cross-shaped or star-shaped or other common shapes for inserting a disposable micro pipette. In addition, due to the plastic deformation of the rubber stopper's own material (generally butyl rubber material) under normal conditions, a certain sealing state can also be maintained at the notch 6.

[0026] On the basis of the above solution, preferably, a columnar limiting part 7 is formed by the downward extension of the upper surface of the middle part of the tube cap 2. An annular cavity 8 for inserting the mouth of the tube body 1 is formed between the columnar limiting part 7 and the side wall of the tube cap 2. The width of the annular cavity 8 gradually decreases from bottom to top. The clamping mechanism 5 includes the columnar limiting part 7, an annular rib 9 protruding inward from the upper end of the inner side surface of the columnar limiting part 7, and an annular groove 10 correspondingly arranged on the outer surface of the rubber stopper 3. When the rubber stopper 3 is installed in place, the annular rib 9 is clamped in the annular groove 10 to achieve clamping and positioning. The function of the columnar limiting part 7 is on the one hand to install the rubber stopper 3, and on the other hand to strengthen the structural strength at the tube cap 2 and facilitate the interference extrusion seal between the tube cap 2 and the tube body 1. Specifically, the outer side wall of the columnar limiting part 7 is in interference extrusion seal with the inner side wall of the tube body 1.

[0027] Preferably, a rubber stopper installation step 11 is provided at the top of the tube cap 2. The top of the columnar limiting part 7 extends downward from the inner side of the rubber stopper installation step 11. When the columnar limiting part 7 extends downward, it gradually inclines inward. The top of the rubber stopper 3 is installed on the rubber stopper installation step 11. The lower part of the rubber stopper 3 inclines inward and the inclination angle corresponds to that of the columnar limiting part 7. A chamfer 12 is provided at the bottom of the rubber stopper 3. The chamfer 12 plays a guiding role when installing the rubber stopper 3 on the one hand. The length and width dimensions of the chamfer 12 are between 0.2-0.5 mm. The chamfer 12 within this dimension range can prevent blood from adhering between the bottom of the rubber stopper 3 and the columnar limiting part 7 after blood collection by siphon with a disposable micro pipette.

[0028] Preferably, a plurality of triangular guiding blocks 13 are evenly arranged on the outer side wall of the tube body 1 and the inner side wall of the tube cap 2 in the circumferential direction. When the tube cap 2 is sleeved on the tube body 1, the triangular guiding blocks 13 on the tube cap 2 and the triangular guiding blocks 13 on the tube body 1 are staggered in sequence, so as to avoid the internal blood splashing out when pulling out the tube cap 2 outward. By directly choosing the way of rotating the tube cap 2, the triangular guiding blocks on the tube cap 2 will be guided upward and separated when encountering the triangular guiding blocks on the tube body 1. During the process of rotating and moving outward at the same time, the action of the tube cap 2 detaching from the tube body 1 is very simple.

[0029] Preferably, a sealing partition layer 14 is arranged in the middle of the tube body 1. The sealing partition layer 14 divides the inside of the tube body 1 into a blood collection part 15 and a labeling part 16. Specifically, the outer diameter of the tube body 1 can be selected as 12.5 mm and the height as 75 mm. The height of the blood collection part 15 is equivalent to that of the labeling part 16, which is convenient for labeling. At the same time, the bottom surface of the labeling part 16 is designed with an opening, which is convenient for the tube body 1 to be directly inserted on the base with an insertion rod.

[0030] Preferably, an annular tube cap rib 17 is arranged at the lower end of the inner side wall of the tube cap 2, and an annular tube body rib 18 is arranged at the upper end of the outer side wall of the tube body 1. When the tube cap 2 is sleeved on the tube body 1, the annular tube cap rib 17 is located below the annular tube body rib 18. When the tube cap 2 is capped on the tube body 1, a clear "click" sound will be emitted when the annular tube cap rib 17 crosses the annular tube body rib 18, indicating that the tube cap 2 is installed in place.

[0031] Preferably, an annular protruding tube cap limiting ring 19 is arranged on the outer side wall at the upper end of the tube body 1. When the tube cap 2 is sleeved on the tube body 1 in place, the bottom of the tube cap 2 is pressed on the tube cap limiting ring 19.

[0032] When collecting blood from children, the capillary blood collection method is adopted to perform siphon blood collection from the punctured finger with a disposable micro pipette. The other end of the disposable micro pipette passes through the incision 6 of the rubber stopper 3 and is located inside the tube body 1. After blood collection, stop bleeding the wound, discard the disposable micro pipette after pulling it out, and transfer the blood collection tube containing blood to the testing department. During testing, the sampling needle of the instrument directly passes through the incision 6 of the rubber stopper 3 and inserts into the blood for sampling. The whole process is simple and fast, and the tube cap 2 does not need to be opened, avoiding the introduction of pollutants due to the operation of opening the tube cap 2 and also avoiding the possible blood splashing situation during the opening process.

[0033] The above is only the preferred embodiment of the present invention, and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still belongs to the scope of the technical solution of the present invention.

Claims

1. A micro blood collection tube for children suitable for capillary blood collection method, comprising a tube body (1), a tube cap (2) and a rubber stopper (3). The tube cap (2) covers the tube body (1) and is press-fitted and sealed at the contact part between the two. It is characterized in that: A rubber stopper installation hole (4) that penetrates up and down is provided in the middle of the tube cap (2). The rubber stopper (3) is installed in the rubber stopper installation hole (4). A clamping mechanism (5) for clamping and positioning the two is provided between the rubber stopper (3) and the rubber stopper installation hole (4). A cut (6) that penetrates the upper and lower surfaces is provided on the rubber stopper (3). A columnar limiting part (7) formed by the downward extension of the upper surface of the middle part of the tube cap (2). An annular cavity (8) for inserting the tube orifice of the tube body (1) is formed between the columnar limiting part (7) and the side wall of the tube cap (2). The width of the annular cavity (8) shows a decreasing trend from bottom to top. The clamping mechanism (5) includes a columnar limiting part (7) and an annular rib (9) protruding inward at the upper end of the inner side surface of the columnar limiting part (7), and an annular groove (10) correspondingly arranged on the outer surface of the rubber stopper (3). When the rubber stopper (3) is installed in place, the annular rib (9) is clamped in the annular groove (10) to achieve clamping and positioning. A rubber stopper installation step (11) is provided at the top of the tube cap (2). The top of the columnar limiting part (7) extends downward from the inner side of the rubber stopper installation step (11). When the columnar limiting part (7) extends downward, it gradually inclines inward. An annular tube cap rib (17) is provided at the lower end of the inner side wall of the tube cap (2). An annular tube body rib (18) is provided at the upper end of the outer side wall of the tube body (1). When the tube cap (2) is sleeved on the tube body (1), the annular tube cap rib (17) is located below the annular tube body rib (18).

2. A micro blood collection tube for children suitable for capillary blood collection method according to claim 1, It is characterized in that: The top of the rubber stopper (3) is installed on the rubber stopper installation step (11). The lower part of the rubber stopper (3) inclines inward and the inclination angle corresponds to that of the columnar limiting part (7). A chamfer (12) is provided at the bottom of the rubber stopper (3). The length and width dimensions of the chamfer (12) are between 0.2 - 0.5 mm.

3. A micro blood collection tube for children suitable for capillary blood collection method according to claim 1, It is characterized in that: A plurality of triangular guiding blocks (13) are uniformly arranged on the outer side wall of the tube body (1) and the inner side wall of the tube cap (2) along the circumferential direction. When the tube cap (2) is sleeved on the tube body (1), the triangular guiding blocks (13) on the tube cap (2) and the triangular guiding blocks (13) on the tube body (1) are staggered in sequence.

4. A micro blood collection tube for children suitable for capillary blood collection method according to claim 1, It is characterized in that: A sealing partition layer (14) is provided in the middle of the tube body (1). The sealing partition layer (14) divides the inside of the tube body (1) into a blood collection part (15) and a labeling part (16).

5. A micro blood collection tube for children suitable for capillary blood collection method according to claim 1, It is characterized in that: An annular protruding tube cap limiting ring (19) is provided on the outer side wall at the upper end of the tube body (1). When the tube cap (2) is sleeved on the tube body (1) in place, the bottom surface of the tube cap (2) is pressed on the tube cap limiting ring (19).

6. A micro blood collection tube for children suitable for capillary blood collection method according to claim 1, characterized in that: The shape of the incision (6) is cross-shaped or star-shaped.

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