CN111870254A - A child micro blood collection tube suitable for capillary blood collection - Google Patents

Abstract

The technical solution of the present invention is a children's micro blood collection tube suitable for capillary blood collection method, including a tube body, a tube cap and a rubber stopper, the tube cap is covered on the tube body and squeezed by interference fit at the contact point of the two Seal, the middle part of the cap is provided with a rubber plug installation hole that is transparent up and down, the rubber plug is installed in the rubber plug installation hole, and a rubber plug is provided between the rubber plug and the rubber plug installation hole to enable the two to be locked and positioned. For the engaging mechanism, the rubber stopper is provided with a cutout penetrating the upper and lower surfaces. The invention has a simplified structure and good blood collection effect, does not need to open the tube cap during blood collection and later detection, and can avoid the risk of introducing pollutants due to the operation of opening the tube cap.

Description

A child micro blood collection tube suitable for capillary blood collection

technical field

The invention relates to the field of medical devices, in particular to a children's micro blood collection tube suitable for the capillary blood collection method.

Background technique

Recently, with the continuous development of medical technology, the technology of diagnosing various diseases through blood tests has been quite developed, and therefore, blood tests are usually required when diagnosing various diseases. Adult blood collection is usually done with vacuum blood collection tubes. In the blood collection of infants and young children, due to the particularity of blood vessels and blood cells, it is difficult to collect venous blood for hematological examination. The rupture of blood cells in young children distorts the test results. Therefore, many medical staff use acupuncture fingertips to bleed, squeeze the fingertips, and use the tube opening of the blood collection tube to directly scrape the baby's fingertips to collect blood. This blood collection method will also destroy blood cells and affect the test results.

Therefore, capillary blood collection is usually used when collecting blood for children. There are mainly two types of capillary blood collection: earlobe blood collection and fingertip blood collection. When collecting blood from infant capillaries, it is generally first to collect blood from the left middle finger of the infant and young child. Or massage the inside of the fingertip of the ring finger to make the local tissue congested naturally, and then wipe the skin of the blood collection site with a 75% ethanol cotton ball and let it dry; then the medical staff uses the thumb and index finger of the left hand to fix the blood collection site of infants and young children to make the skin and subcutaneous tissue. Tightly, the medical staff should hold a disposable blood collection and disinfection needle with the right hand and quickly pierce it from the inner side of the fingertip to a depth of 2-3mm, and then withdraw the needle immediately; after the blood flows out naturally, wipe the first drop of blood with a sterile dry cotton ball. When the blood flows out naturally, use a disposable micropipette to suck blood and guide it into the children's blood collection tube to complete the process of children's blood collection.

The applicant has made improvements to children's blood collection tubes, such as the invention patent named "Children's Micro Blood Collection Tubes for Automatic Labeling Detection System" and the application number is 2017200846828. However, the top cover of this blood collection tube needs to be opened during subsequent on-machine testing, and there is a risk of introducing contaminants in the process of opening the top cover and affecting the test results, and the tube cover needs to be opened during blood collection, and there is also a risk of entering the Risk of contaminants affecting test results.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention aims to provide a children's micro blood collection tube suitable for the capillary blood collection method, which has a simplified structure and good blood collection effect. Risk of introducing contaminants from operation.

The technical solution of the present invention is a children's micro blood collection tube suitable for capillary blood collection method, including a tube body, a tube cap and a rubber stopper, the tube cap is covered on the tube body and squeezed by interference fit at the contact point of the two Seal, the middle part of the cap is provided with a rubber plug installation hole that is transparent up and down, the rubber plug is installed in the rubber plug installation hole, and a rubber plug is provided between the rubber plug and the rubber plug installation hole to enable the two to be locked and positioned. For the engaging mechanism, the rubber stopper is provided with a cutout penetrating the upper and lower surfaces.

Preferably, the upper surface of the middle portion of the cap is formed with a cylindrical limiting portion extending downward, and an annular cavity for inserting the mouth of the tube body is formed between the cylindrical limiting portion and the side wall of the cap, and the annular cavity is The width tends to decrease from bottom to top.

Preferably, the engaging mechanism includes a cylindrical limiting portion, an annular rib located on the inner surface of the cylindrical limiting portion and an annular rib that protrudes inward from the upper end, and a corresponding annular groove on the outer surface of the rubber stopper. When the plug is installed in place, the annular rib is engaged in the annular groove to realize the engagement and positioning.

Preferably, the top of the cap is provided with a rubber stopper installation step, the top of the column-shaped limiting portion starts to extend downward from the inner side of the rubber stopper installation step, and the column-shaped limiting portion gradually slopes inward as it extends downwards.

Preferably, the top of the rubber stopper is installed on the rubber stopper installation step, the lower part of the rubber stopper is inclined inward and the inclination angle corresponds to the inclination angle of the column-shaped stopper, the bottom of the rubber stopper is provided with a chamfer, the The length and width of the chamfer are between 0.2-0.5mm.

Preferably, a plurality of triangular guide blocks are evenly arranged on the outer side wall of the pipe and the inner side wall of the pipe cap along the circumferential direction, and when the pipe cap is sleeved on the pipe body, the triangular guide blocks on the pipe cap and the The triangular guide blocks are staggered in turn.

Preferably, a sealing barrier layer is arranged in the middle of the tube body, and the sealing barrier layer divides the inside of the tube body into a blood collection part and a labeling part.

Preferably, the lower end of the inner side wall of the pipe cap is provided with an annular pipe cap convex rib, and the upper end of the outer side wall of the pipe is provided with an annular pipe body convex rib. When the pipe cap is sleeved on the pipe body, the annular pipe cap is convex. The rib is located under the convex rib of the annular pipe body.

Preferably, the outer side wall of the upper end of the pipe body is provided with an annularly protruding pipe cap limit ring. When the pipe cap is sleeved on the pipe body in place, the bottom surface of the pipe cap is pressed on the pipe cap limit ring. .

Preferably, the shape of the incision is a cross shape or a rice shape.

The invention is simple in structure, and has good blood collection effect in conjunction with the capillary blood collection method. The cap of the tube does not need to be opened during blood collection and later detection. When blood collection, a disposable micropipette is directly inserted into the incision of the rubber stopper and enters the tube body. One end is directly placed on the bleeding wound of the fingers of infants and young children, which can directly realize the process of blood collection. When testing, the sampling needle can be directly passed through the rubber stopper incision into the blood in the tube body, which can avoid contamination caused by the operation of opening the tube cap. material risk.

Description of drawings

Fig. 1 is the exploded view of the present invention;

Fig. 2 is the top view of the present invention;

Fig. 3 is the full sectional view of the present invention;

Fig. 4 is the partial enlarged view of A place in Fig. 3;

Fig. 5 is the full sectional view when the rubber plug of the present invention is pulled out;

Fig. 6 is a partial enlarged view at B in Fig. 5;

Among them: 1—pipe body; 2—pipe cap; 3—plastic plug; 4—plastic plug installation hole; 5—clamping mechanism; 6—cut; 10—annular groove; 11—rubber stopper installation step; 12—chamfering; 13—triangular guide block; 14—sealing compartment; 15—blood collection part; 16—labeling part; 17—annular tube Cap rib; 18 - annular tube body rib; 19 - cap limit ring.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIGS. 1 to 6 , the present invention provides a micro blood collection tube for children suitable for capillary blood collection, including a tube body 1 , a tube cap 2 and a rubber stopper 3 , and the tube cap 2 is covered on the tube body 1 . The upper and lower parts of the tube cap 2 are provided with an upper and lower transparent rubber plug installation hole 4 in the middle of the tube cap 2, and the rubber plug 3 is installed in the rubber plug installation hole 4. The rubber plug 3 and the rubber stopper mounting hole 4 are provided with an engaging mechanism 5 that enables the two to be engaged and positioned. The rubber stopper 3 is provided with a cutout 6 penetrating the upper and lower surfaces, wherein the shape of the cutout 6 can be a cross shape or a rice shape. Or other common shapes that can be inserted into disposable micropipettes. In addition, under normal conditions, due to the plastic deformation of the rubber plug itself (usually butyl rubber material), the incision 6 can also maintain a certain sealing state.

On the basis of the above solution, preferably, a cylindrical limiting portion 7 is formed by extending downward from the upper surface of the middle portion of the cap 2, and a pipe for the tube body 1 is formed between the cylindrical limiting portion 7 and the side wall of the cap 2. The annular cavity 8 is inserted into the mouth, and the width of the annular cavity 8 tends to decrease from bottom to top. The inner raised annular rib 9 and the corresponding annular groove 10 located on the outer surface of the rubber plug 3, when the rubber plug 3 is installed in place, the annular rib 9 is engaged in the annular groove 10 The internal locking and positioning are realized, and the function of the cylindrical limit part 7 is to install the rubber plug 3 on the one hand, and strengthen the structural strength of the pipe cap 2 on the other hand, and also facilitate the passage between the pipe cap 2 and the pipe body 1. Extrusion sealing, specifically, interference extrusion sealing between the outer side wall of the cylindrical limiting portion 7 and the inner side wall of the pipe body 1 .

Preferably, the top of the cap 2 is provided with a rubber stopper installation step 11 , the top of the cylindrical limiting portion 7 starts to extend downward from the inner side of the rubber stopper installation step 11 , and the cylindrical limiting portion 7 gradually extends downward. Inclined 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 is inclined inward and the inclination angle corresponds to the inclination angle of the column-shaped limiting portion 7, and the bottom of the rubber stopper 3 is opened There is a chamfer 12. On the one hand, the chamfer 12 is set to facilitate the installation of the rubber stopper 3 and play a guiding role. The length and width of the chamfer 12 are between 0.2-0.5mm. Avoid blood adhering between the bottom of the rubber stopper 3 and the column-shaped limiting portion 7 after the disposable micropipette is siphoned for blood collection.

Preferably, a plurality of triangular guide blocks 13 are evenly arranged on the outer side wall of the pipe body 1 and the inner side wall of the pipe cap 2 along the circumferential direction. The block 13 and the triangular guide block 13 on the tube body 1 are staggered in turn to avoid the blood splashing out when the tube cap 2 is pulled out, and the way of rotating the tube cap 2 is directly selected. The triangular guide block on the tube cap 2 encounters the tube body. The triangular guide block on 1 will be guided upwards and disengaged, and the process of rotating and moving outwards makes it very simple for the cap 2 to detach from the body 1.

Preferably, a sealing layer 14 is provided in the middle of the tube body 1, and the sealing layer 14 divides the inside of the tube body 1 into a blood collection part 15 and a labeling part 16, wherein the outer diameter of the tube body 1 can be selected to be 12.5 mm, the height is 75mm, the height of the blood collection part 15 is equal to the height of the labeling part 16, which is convenient for labeling.

Preferably, the lower end of the inner side wall of the pipe cap 2 is provided with an annular pipe cap rib 17, and the upper end of the outer side wall of the pipe body 1 is provided with an annular pipe body rib 18. When the pipe cap 2 is sleeved on the pipe body 1, The annular pipe cap rib 17 is located below the annular pipe body rib 18. When the pipe cap 2 is covered on the pipe body 1, the annular pipe cap rib 17 will make a crisp sound when it crosses the annular pipe body rib 18. The sound indicates that the cap 2 is installed in place.

Preferably, the outer side wall of the upper end of the pipe body 1 is provided with an annularly protruding pipe cap limit ring 19. When the pipe cap 2 is sleeved on the pipe body 1 in place, the bottom of the pipe cap 2 is pressed against the pipe cap stop ring 19.

When collecting blood for children, the capillary blood collection method is used to collect blood from the punctured finger with a disposable micropipette. The other end of the disposable micropipette passes through the incision 6 of the rubber stopper 3 and is located in the tube body 1. After the blood collection is completed, the wound is given to the wound. To stop bleeding, pull out the disposable micropipette and discard it. Transfer the blood collection tube containing blood to the testing department. When testing, insert the sampling needle of the instrument directly through the incision 6 of the rubber stopper 3 and insert it into the blood for sampling. The whole process is simple and fast. In addition, it is not necessary to open the cap 2, so as to avoid the introduction of contaminants due to the operation of opening the cap 2, and to avoid possible blood splashing in the process of opening the cap.

The above are only preferred embodiments of the present invention, and do not limit the invention in any form. Any simple modifications, equivalent changes or modifications made to the above embodiments according to the technical principles of the present invention still belong to the present invention. within the scope of the technical solution of the invention.

Claims (10)

1. The utility model provides a children's trace heparin tube that is fit for capillary blood sampling method, includes body (1), tube cap (2) and plug (3), tube cap (2) lid closes on body (1) and contact department interference fit extrusion seal, its characterized in that between them: penetrating plug mounting hole (4) about pipe cap (2) middle part is seted up, plug (3) are installed in plug mounting hole (4), be provided with between plug (3) and plug mounting hole (4) and make both block clamping mechanism (5) of block location, be provided with incision (6) of lining up the upper and lower surface on plug (3).

2. The micro blood collection tube for children according to claim 1, wherein: the utility model discloses a pipe cap (2) is characterized in that pipe cap (2) middle part upper surface downwardly extending forms column spacing portion (7), form between column spacing portion (7) and pipe cap (2) lateral wall and supply body (1) mouth of pipe male annular appearance chamber (8), the annular width that holds chamber (8) is the trend of reducing from bottom to top.

3. The micro blood collection tube for children according to claim 2, wherein: the clamping mechanism (5) comprises a columnar limiting part (7) and an annular rib (9) which is located at the upper end of the inner side surface of the columnar limiting part (7) and is inwards convex, and an annular groove (10) which is located on the outer surface of the rubber plug (3) and is correspondingly arranged, when the rubber plug (3) is installed in place, the annular rib (9) is clamped in the annular groove (10) to realize clamping and positioning.

4. The micro blood collection tube for children according to claim 3, wherein: the pipe cap (2) top is provided with plug installation step (11), the beginning downwardly extending of the inboard department from plug installation step (11) is located at the spacing portion of column (7) top, the spacing portion of column (7) inwards inclines gradually when downwardly extending.

5. The micro blood collection tube for children according to claim 4, wherein: the rubber plug (3) top is installed on rubber plug installation step (11), the inside slope of rubber plug (3) lower part and inclination correspond with the inclination of the spacing portion of column (7), chamfer (12) have been seted up to rubber plug (3) bottom, the length and width size of chamfer (12) is between 0.2-0.5 mm.

6. The micro blood collection tube for children according to claim 1, wherein: the pipe cap is characterized in that a plurality of triangular guide blocks (13) are uniformly arranged on the outer side wall of the pipe body (1) and the inner side wall of the pipe cap (2) along the circumferential direction, and when the pipe cap (2) is sleeved on the pipe body (1), the triangular guide blocks (13) on the pipe cap (2) and the triangular guide blocks (13) on the pipe body (1) are staggered in sequence.

7. The micro blood collection tube for children according to claim 1, wherein: the blood collection and labeling device is characterized in that a sealing interlayer (14) is arranged in the middle of the tube body (1), and the sealing interlayer (14) divides the interior of the tube body (1) into a blood collection part (15) and a labeling part (16).

8. The micro blood collection tube for children according to claim 1, wherein: the pipe cap (2) inside wall lower extreme is provided with annular pipe cap protruding muscle (17), body (1) lateral wall upper end is provided with annular body protruding muscle (18), when pipe cap (2) cover was established on body (1), annular pipe cap protruding muscle (17) are located annular body protruding muscle (18) below.

9. The micro blood collection tube for children according to claim 8, wherein: the pipe cap limiting ring (19) protruding in the annular shape is arranged on the outer side wall of the upper end of the pipe body (1), and when the pipe cap (2) is sleeved on the pipe body (1) in place, the bottom surface of the pipe cap (2) is pressed on the pipe cap limiting ring (19).

10. The micro blood collection tube for children according to claim 1, wherein: the shape of the incision (6) is cross-shaped or m-shaped.

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