CN213721995U - Blood sampling device with disinfection safeguard function - Google Patents

Abstract

The utility model discloses a blood sampling device with disinfection and protection functions, which is used for communicating a blood sampling tube to perform blood sampling, comprises a blood sampling needle communicated with the blood sampling tube, and also comprises a shell, a disinfection device, a needle handle and a spring; the shell is a hollow shell, the front end of the shell is provided with a front port, the rear end of the shell is provided with a rear port, the front port of the interior of the shell is provided with a disinfection accommodating cavity, and the upper part of the shell is provided with a bayonet; the needle handle is provided with a telescopic buckle device matched with the bayonet, and the needle handle is fixedly embedded with the blood drawing needle and can be arranged in the shell in a sliding manner; the spring is embedded on the blood drawing needle, one end of the spring is connected with the needle handle, and the other end of the spring is connected with the rear port of the shell; the disinfection device is arranged in the disinfection containing cavity and is positioned in front of the needle point of the blood drawing needle. The beneficial effects are as follows: after the blood drawing is completed, the blood adhered to the blood drawing needle and the needle point is returned, sterilized and protected, so that the possibility of hurting people is reduced, and the transmission of pathogens possibly carried is avoided.

Description

Blood sampling device with disinfection safeguard function

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to blood sampling device with disinfection safeguard function.

Background

The currently used blood drawing needle is basically a single needle, which is stained with blood after the blood drawing is completed, and easily drops on other skin of a person, and the needle is thrown into a garbage bag/garbage can, and is inevitably contacted by a recycling person, so that the person is possibly hurt, and if the needle head is provided with pathogens, the pathogens are possibly transmitted to the punctured human body.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the back is accomplished in the blood sampling to present blood drawing needle, does not have protection and not disinfect, has the problem of stabbing and spreading the pathogen, and aim at provides a blood sampling device with disinfection safeguard function, realizes the blood drawing and accomplishes the back, will draw the blood drawing needle to roll back, with being stained with on the needle in the blood returns and brings the shell into, disinfect and protect simultaneously, reduce the possibility of stabbing the people and avoid probably the pathogen propagation that carries.

The utility model discloses a following technical scheme realizes:

a blood sampling device with disinfection and protection functions is used for communicating a blood sampling tube to perform blood sampling, and comprises a blood sampling needle communicated with the blood sampling tube, a shell, a disinfection device, a needle handle and a spring; the shell is a hollow shell, the front end of the shell is provided with a front port, the rear end of the shell is provided with a rear port, the front port of the interior of the shell is provided with a disinfection accommodating cavity, and the upper part of the shell is provided with a bayonet; the needle handle is provided with a telescopic buckle device matched with the bayonet, and the needle handle is fixedly embedded with the blood drawing needle and can be arranged in the shell in a sliding manner; the spring is embedded on the blood drawing needle, one end of the spring is connected with the needle handle, and the other end of the spring is connected with the rear port of the shell; the disinfection device is arranged in the disinfection containing cavity and is positioned in front of the needle tip of the blood drawing needle; the tail part of the blood drawing needle is pushed, the blood drawing needle penetrates through the disinfection device, after disinfection, the blood drawing needle extends out of the front port, the telescopic buckling device is clamped by the bayonet, and the needle point of the blood drawing needle is kept to extend out; the telescopic buckle device is unfastened, and the needle tip of the blood drawing needle retracts into the shell.

Through the design, the blood drawing needle is arranged in the shell and is connected with the spring, meanwhile, the disinfection device is arranged at the front end of the needle point, when blood is required to be drawn, the blood drawing needle is pushed outwards, the blood drawing needle penetrates through the disinfection device to be disinfected, then the blood drawing needle is pushed outwards continuously, the telescopic buckling device is clamped at the clamping opening, at the moment, the needle point of the blood drawing needle extends out of the shell and is fixedly clamped, then blood drawing operation is carried out, after the blood drawing is finished, the telescopic buckling device is unfastened, the needle point of the blood drawing needle retracts into the shell, the needle point approaches the disinfection device again, disinfection is carried out, and infectious pathogens possibly existing are killed. Above technique has realized the protection to the bloodletting needle, cover the needle point by the shell, avoided the needle point to stab the people, adopt degassing unit simultaneously, disinfect to the needle point before the bloodletting, in order to guarantee the clean health of needle point, avoid the blood sampling position of human body to take place the infection, after accomplishing the blood sampling, in getting blood that is stained with on the needle point of bloodletting back together with the needle point and bringing into the shell, disinfect the needle point once more, kill infectious pathogen that probably exists, avoided it to carry infectious pathogen, cause the propagation of disease.

Preferably, the disinfection device is a sealed bag wrapped with disinfection cotton, and the disinfection cotton is soaked with disinfection liquid.

Adopt the aseptic cotton to pass through the antiseptic solution, then seal it in sealed package, this kind of mode can reach effectual disinfection effect, simultaneously, simple structure, production are swift, low in production cost.

Furthermore, the sealing bag is made of transparent rubber materials, and a puncture opening of the sealing bag after being punctured by the blood drawing needle can be automatically shrunk and sealed.

Is made of transparent rubber material, and the puncture opening of the blood drawing needle after puncture can be automatically contracted and sealed. So as to ensure that the disinfectant inside the blood drawing needle is not easy to invade after puncture.

Furthermore, the inside guide way that is used for leading telescopic buckle device that still is equipped with of shell, the card sets up in the tank bottom of guide way, and telescopic buckle device is gliding inlays in the guide way. Realize the gliding direction of telescopic buckle device through setting up the guide way to guarantee to make the blood drawing needle not produce rotatoryly promoting the in-process of drawing the blood needle, guarantee the normal clear of blood sampling operation.

Preferably, the telescopic buckle device comprises a buckle protrusion and a buckle spring; the needle handle is provided with a sliding cavity, the bottom of the sliding cavity is provided with a spring mounting hole, the buckle spring is mounted in the spring mounting hole, the clamping protrusion is slidably embedded in the sliding cavity, and the inner bottom surface of the clamping protrusion is in contact with the buckle spring. With the protruding and buckle spring of preferred card of telescopic buckle device, utilize buckle spring to the protruding extrapolate effort of card, make it keep the trend of outside motion, the card is protruding under the inner wall extrusion of shell, make buckle spring be in compression state, when treating to slide bayonet socket department, because the elasticity of bayonet socket spring, will block protruding extrapolating, the bayonet socket is worn out to the card is protruding, is blocked, realizes the fixed positioning of taking out the blood needle, preferred this kind of structure, whole design simple structure, reliable operation, low in production cost.

Preferably, the clamping protrusion is a right triangle, one right-angle side of the clamping protrusion is parallel to the axis of the needle handle, is embedded in the sliding cavity and is in contact with the clamping spring; the other right-angle side is vertical to the axis of the needle handle; the right-angle side of the right-angle triangle exposed out of the sliding cavity is positioned at the lower part, and the oblique-angle side is positioned at the upper part. The clamping protrusion is preferably a right-angled triangle, one right-angled side of the clamping protrusion is parallel to the axis of the needle handle, and the clamping protrusion is embedded in the sliding cavity and is contacted with the clamping spring; the other right-angle side is perpendicular to the axis of the needle handle, and the structure design and the arrangement form utilize the right-angle side of the right-angle triangle to generate blocking at the bayonet to fixedly keep the blood drawing needle in an extending state so as to carry out blood drawing operation.

Further, the thickness of the right triangle is smaller than the groove width of the guide groove.

The thickness of the right triangle is slightly smaller than the width of the guide groove, so that the sliding process is smoother.

Furthermore, the groove bottom of the guide groove is provided with a vertical bulge at a position close to the lower part of the bayonet, the height of the vertical bulge is smaller than the depth of the guide groove, and the vertical bulge blocks the blood drawing needle in the retraction process of the blood drawing needle, so that the needle tip of the blood drawing needle stays and is soaked in the disinfection device. Through the design of the vertical protrusion, the blood drawing needle is blocked in the retraction process, and the needle tip of the blood drawing needle stays and is soaked in the disinfection device, so that infectious pathogens possibly carried by the needle tip can be killed for enough time and at enough concentration.

Further, the needle point of the blood drawing needle stays and is soaked in the disinfection device, and the length of the soaked needle point of the blood drawing needle is 1.5 cm-2.5 cm. The length of the soaked needle point of the blood drawing needle is 1.5 cm-2.5 cm, the length of the blood drawing needle inserted into a human body for drawing blood is generally more than 1cm, the soaking length of the needle point of the blood drawing needle is ensured to be 1.5 cm-2.5 cm, so that the whole part of the needle point stained with blood is completely covered, and the whole disinfection treatment of the blood drawing needle is completed.

Furthermore, the length of the blood drawing needle is longer than that of the shell, the tail part of the blood drawing needle extends out of the rear port of the shell, and the tail part of the blood drawing needle is communicated with the blood drawing pipe. The length design of the shell is longer than that of the blood drawing needle, and the tail of the blood drawing needle extends out of the rear port of the shell, so that when the blood drawing needle is pushed, the tail of the blood drawing needle can be directly held, the blood drawing needle is pushed, and the whole blood drawing operation is more convenient and quicker.

Compared with the prior art, the utility model, following advantage and beneficial effect have: a blood sampling device with disinfection safeguard function, after realizing drawing blood and accomplishing, get back into the shell with drawing blood needle point and the blood that is stained with on the needle point, disinfection processing to protect the needle point, reduce the possibility of stabbing the people and avoid the pathogen transmission that probably carries.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is an enlarged view of a portion B of fig. 1.

Reference numbers and corresponding part names in the drawings:

1-shell, 11-front port, 12-disinfection containing cavity, 13-guide groove, 14-bayonet, 15-vertical protrusion, 16-rear port, 2-blood drawing needle, 3-disinfection device, 4-needle handle, 41-sliding cavity, 42-spring mounting hole, 5-spring, 6-bayonet, 7-buckle spring and 8-blood drawing tube.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.

Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the present invention.

Examples

As shown in fig. 1-3, the blood sampling device with disinfection and protection functions of the present invention is used for communicating a blood sampling tube 8 for blood sampling, and comprises a blood sampling needle 2 communicated with the blood sampling tube 8, a housing 1, a disinfection device 3, a needle handle 4 and a spring 5; the shell 1 is a hollow shell, the front end of the shell is provided with a front port 11, the rear end of the shell is provided with a rear port 16, the front port 11 inside the shell is provided with a disinfection accommodating cavity 12, and the upper part of the shell 1 is provided with a bayonet 14; the needle handle 4 is provided with a telescopic buckle device matched with the bayonet 14, and the needle handle 4 is fixedly embedded with the blood drawing needle 2 and can be arranged in the shell 1 in a sliding way; the spring 5 is embedded on the blood drawing needle 2, one end of the spring is connected with the needle handle 4, and the other end of the spring is connected to the rear port 16 of the shell 1; the disinfection device 3 is arranged in the disinfection containing cavity 12 and is positioned at the front part of the needle point of the blood drawing needle 2; the tail part of the blood drawing needle 2 is pushed, the blood drawing needle 2 penetrates through the disinfecting device 3, after disinfection, the blood drawing needle extends out of the front port 11, the telescopic buckling device is clamped by the bayonet 14, and the needle point of the blood drawing needle 2 is kept to extend out; the telescopic buckle device is unlocked, and the needle point of the blood drawing needle 2 retracts into the shell 1.

During the use, will draw blood needle 2 and release from shell 1, the needle point puncture degassing unit 3 of drawing blood needle 2, carry out disinfection treatment, make the human body take place to infect when avoiding drawing blood, treat to continue to promote the in-process, telescopic buckle device reaches bayonet 14 department and is detained by the card, at this moment, make draw blood needle 2 keep stretching out the state of shell 1, can carry out the operation of drawing blood, after accomplishing the drawing blood, untie telescopic buckle device and the buckle of bayonet socket, draw blood needle 2 withdrawal shell 1 in, in-process, the needle point of drawing blood needle 2 is through degassing unit once more, disinfect, kill infectious disease pathogen that probably carries with the needle point. Through above mode, utilize shell 1 to realize the protection to bloodletting needle 2 promptly, avoid using, abandon the back, the needle point stabs the people, adopt degassing unit simultaneously, to before the blood sampling, all carry out disinfection treatment after, the human body of disinfecting infects before the bloodletting, will take out bloodletting needle 2 and needle point after the bloodletting go up attached blood and return along with the needle point and bring in the shell and disinfect and protect together, realize killing infectious pathogen that probably exists, avoid infectious agents's propagation.

In some embodiments, the disinfection device 3 is a sealed bag wrapped with disinfection cotton, and the disinfection cotton is soaked with disinfection liquid. As a preferred embodiment, the sterilizing device 3 is made by selecting sterilizing cotton to soak the sterilizing liquid and sealing the sterilizing cotton and a certain amount of sterilizing liquid in the sealed package.

In some embodiments, the sealing bag is made of transparent rubber material, and the puncture opening of the sealing bag after being punctured by the blood drawing needle can automatically shrink and seal. As a preferred embodiment, the sealing bag is made of transparent rubber material, and the puncture hole of the sealing bag after being punctured by the blood drawing needle can be automatically shrunk and sealed, so that the hole after being punctured by the blood drawing needle 2 can be rapidly sealed, the invasion of disinfectant in the sealing bag is avoided, and the effective killing concentration of pathogens is ensured. If other materials which can not automatically seal the puncture hole are adopted as the sealing bag, the disinfectant can easily invade from the puncture hole after being punctured, and the concentration for killing pathogens is reduced.

In some embodiments, a guide groove 13 for guiding the retractable buckle device is further provided inside the housing 1, the bayonet 14 is provided at a bottom of the guide groove 13, and the retractable buckle device is slidably inserted into the guide groove 13. As a preferred embodiment, the guide groove 13 is designed to guide the sliding of the telescopic fastening device, so that the blood drawing needle 2 is prevented from rotating when the blood drawing needle 2 is pushed, the telescopic fastening device and the bayonet are possibly dislocated, and the blood drawing operation efficiency is possibly influenced.

In some embodiments, the telescopic snap means comprise a snap boss 6 and a snap spring 7; the needle handle 4 is provided with a sliding cavity 41, the bottom of the sliding cavity 41 is provided with a spring mounting hole 42, the buckle spring 7 is mounted in the spring mounting hole 42, the clamping protrusion 6 is slidably embedded in the sliding cavity 41, and the inner bottom surface of the clamping protrusion 6 is in contact with the buckle spring 7. As a preferred embodiment, the telescopic buckling device is designed into the clamping protrusion 6 and the buckling spring 7, the inner wall of the shell 1 extrudes the clamping protrusion 6 by utilizing the matching of the clamping protrusion 6 and the buckling spring 7, so that the buckling spring 7 is in a compressed state, the inner wall of the shell 1 loses the extrusion of the clamping protrusion 6 when sliding to the bayonet 14, the clamping protrusion 6 is pushed out of the bayonet 14 under the action of the elastic force of the bayonet spring 7, the blood drawing needle 2 is kept in an extending state so as to carry out blood drawing operation, the structure design is simple, the buckling is conveniently realized, after the blood drawing is finished, the clamping protrusion 6 is pressed to retract into the shell 1, and then the blood drawing needle 2 slides downwards and retracts under the pulling of the elastic force of the spring 5.

In some embodiments, the locking protrusion 6 is a right triangle, one of which is parallel to the axis of the needle shaft 4, is embedded in the sliding cavity 41, and is in contact with the locking spring 7; the other right-angle side is vertical to the axis of the needle handle 4; the right-angled side of the right-angled triangle exposed out of the slide chamber 41 is located at the lower part, and the oblique side is located at the upper part. In a preferred embodiment, the snap 6 is designed as a right triangle, one of which is parallel to the axis of the needle shaft 4, embedded in the sliding cavity 41 and in contact with the snap spring 7. The right-angle side of the right-angled triangle is used for generating blocking at the bayonet 14, so that the blood drawing needle 2 is kept in an extending state, and the blood drawing operation is convenient to carry out.

In some embodiments, the thickness of the right triangle is less than the slot width of the guide slot 13. As a preferable embodiment, the thickness of the right triangle is designed to be smaller than the groove width of the guide groove 13, and the thickness of the right triangle is designed to be equal to the groove width of the guide groove 13, so that the right triangle slides more smoothly in the guide groove 13.

In some embodiments, a vertical protrusion 15 is disposed at a position of the groove bottom of the guide groove 13 close to the lower portion of the bayonet 14, the protrusion height of the vertical protrusion 15 is smaller than the groove depth of the guide groove 13, and the vertical protrusion 15 is used for blocking the blood drawing needle 2 during retraction of the blood drawing needle 2, so that the needle tip of the blood drawing needle 2 stays and is soaked in the disinfection device 3. As a preferred embodiment, the design of the vertical protrusion 15 is added, so that the blood drawing needle 2 is blocked in the retraction process of the blood drawing needle 2, the needle tip of the blood drawing needle 2 stays and is soaked in the disinfection device 3, the needle tip of the blood drawing needle 2 is ensured to be soaked for a sufficient time, the effective killing time and the killing concentration of pathogens are ensured, and if the needle tip of the blood drawing needle 2 only passes through the disinfection device in a quick way, the disinfectant carried by the needle tip is possibly insufficient in the killing concentration of the pathogens, insufficient in action time and difficult to achieve the degree of thorough killing.

In some embodiments, the needle tip of the blood drawing needle 2 stays and is soaked in the disinfection device 3, and the length of the soaked needle tip of the blood drawing needle 2 is 1.5 cm-2.5 cm. As a preferable embodiment, the length of the needle point of the blood drawing needle 2 inserted into the human body is generally about 1cm, and the length of the needle point is ensured to be 1.5 cm-2.5 cm for soaking, so that the whole blood drawing part is covered, and the effective area is sterilized.

In some embodiments, the length of the blood drawing needle 2 is longer than the length of the housing 1, the tail of the blood drawing needle 2 extends out of the rear port 16 of the housing 1, and the tail of the blood drawing needle 2 is communicated with the blood drawing vessel 8. As a preferable embodiment, the length of the blood drawing needle 2 is longer than that of the shell 1, and the tail part of the blood drawing needle 2 extends out of the rear port 16 of the shell 1, so that the tail part of the blood drawing needle 2 can be pinched and pushed more conveniently, and the blood drawing operation can be completed quickly.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A blood sampling device with disinfection and protection functions is used for being communicated with a blood sampling tube (8) to perform blood sampling, and comprises a blood sampling needle (2) communicated with the blood sampling tube (8), and is characterized by further comprising a shell (1), a disinfection device (3), a needle handle (4) and a spring (5); the shell (1) is a hollow shell, the front end of the shell is provided with a front port (11), the rear end of the shell is provided with a rear port (16), the front port (11) inside the shell is provided with a disinfection accommodating cavity (12), and the upper part of the shell (1) is provided with a bayonet (14); the needle handle (4) is provided with a telescopic buckle device matched with the bayonet (14), and the needle handle (4) is fixedly embedded with the blood drawing needle (2) and can be arranged in the shell (1) in a sliding way; the spring (5) is embedded on the blood drawing needle (2), one end of the spring is connected with the needle handle (4), and the other end of the spring is connected to a rear port (16) of the shell (1); the disinfection device (3) is arranged in the disinfection containing cavity (12) and is positioned at the front part of the needle point of the blood drawing needle (2); the tail part of the blood drawing needle (2) is pushed, the blood drawing needle (2) penetrates through the disinfection device (3), after disinfection, the blood drawing needle extends out of the front port (11), the telescopic buckling device is clamped by the bayonet (14), and the needle point of the blood drawing needle (2) is kept to extend out; the telescopic buckle device is unlocked, and the needle point of the blood drawing needle (2) retracts into the shell (1).

2. The blood collection device with disinfection and protection function as claimed in claim 1, wherein said disinfection device (3) is a sealed bag with disinfection cotton wrapped inside, said disinfection cotton is soaked with disinfection liquid.

3. The blood collection device with disinfection and protection functions as claimed in claim 2, wherein the sealing bag is made of transparent rubber material, and the puncture opening of the sealing bag after being punctured by the blood drawing needle can be automatically shrunk and sealed.

4. The blood collecting device with disinfection and protection function as claimed in claim 3, wherein the housing (1) is further provided with a guide groove (13) for guiding the retractable snap-in device, the bayonet (14) is provided at the bottom of the guide groove (13), and the retractable snap-in device is slidably inserted into the guide groove (13).

5. The blood collecting device with the disinfection and protection function as claimed in any one of claims 1 to 4, wherein the telescopic buckling device comprises a buckling protrusion (6) and a buckling spring (7); the needle handle (4) is provided with a sliding cavity (41), the bottom of the sliding cavity (41) is provided with a spring mounting hole (42), the buckle spring (7) is mounted in the spring mounting hole (42), the clamping protrusion (6) is slidably embedded in the sliding cavity (41), and the inner bottom surface of the clamping protrusion (6) is in contact with the buckle spring (7).

6. The blood sampling device with disinfection and protection function as claimed in claim 5, wherein said clamping protrusion (6) is a right triangle, one of which is parallel to the axis of the needle handle (4), embedded in the sliding cavity (41), and contacts with the snap spring (7); the other right-angle side is vertical to the axis of the needle handle (4); the right-angle side of the right-angle triangle exposed out of the sliding cavity (41) is positioned at the lower part, and the oblique side is positioned at the upper part.

7. A lancing device according to claim 6, characterized in that the thickness of the right triangle is smaller than the width of the guide groove (13).

8. The blood collecting device with the disinfection and protection function as claimed in claim 7, wherein a vertical protrusion (15) is arranged at a position of the groove bottom of the guide groove (13) close to the lower part of the bayonet (14), the protrusion height of the vertical protrusion (15) is smaller than the groove depth of the guide groove (13), and the vertical protrusion (15) is used for blocking the blood drawing needle (2) during the retraction process of the blood drawing needle (2) so that the needle tip of the blood drawing needle (2) stays and is soaked in the disinfection device (3).

9. The blood sampling device with disinfection and protection function as claimed in claim 8, wherein the needle tip of the blood drawing needle (2) stays and is soaked in the disinfection device (3), and the length of the soaked needle tip of the blood drawing needle (2) is 1.5 cm-2.5 cm.

10. The blood sampling device with disinfection and protection functions as claimed in any one of claims 6 to 9, wherein the length of the blood drawing needle (2) is longer than that of the housing (1), the tail part of the blood drawing needle (2) extends out of the rear port (16) of the housing (1), and the tail part of the blood drawing needle (2) is communicated with the blood drawing tube (8).

Images