CN214911785U - Artery indwelling needle provided with one-way blocking device - Google Patents

Abstract

The utility model provides an artery indwelling needle provided with a one-way blocking device, relating to the field of medical instruments. It includes: the connector comprises a first connector, a second connector and a connecting piece, wherein a Y-shaped communicating groove is formed in the first connector, the communicating groove comprises a linear first groove body and a second groove body communicated with the middle of the first groove body, two ends of the first groove body are located on the same side of the first connector, a first protective plug is arranged in the first groove body, and a second protective plug is arranged in the second groove body; the sleeve is communicated with one end of the first groove body, and the end part of the first groove body connected with the sleeve is positioned between the sleeve and the second groove body; the needle plug is provided with a needle core. The artery indwelling needle provided with the one-way blocking device can reduce local oppression and improve use comfort.

Description

Artery indwelling needle provided with one-way blocking device

Technical Field

The utility model relates to the field of medical equipment, particularly, relate to an artery indwelling needle who is provided with one-way blocking device.

Background

The use of the indwelling needle is convenient for clinical medication, emergency treatment medication for critical patients, reduction of workload of nurses and reduction of frequent puncture pain of patients, so that the indwelling needle is widely applied to clinical treatment.

The structure of the existing indwelling needle mainly comprises a soft catheter/sleeve which can be indwelling in a blood vessel and a puncture guiding needle core, wherein the catheter/sleeve is sleeved outside the needle core, the needle core has certain softness, can be elastically deformed to a certain degree, is harder relative to the catheter/sleeve and can guide the catheter/sleeve to puncture the skin and the blood vessel. When in use, the catheter/sleeve and the needle core are punctured into a blood vessel together, after the catheter/sleeve enters the proper position of the blood vessel, the needle core is withdrawn, and only the soft catheter/sleeve is left in the blood vessel so as to carry out infusion treatment; the catheter/cannula is usually kept in the body, so the position of the catheter/cannula needs to be fixed, the current fixation is carried out by fixing the joint on the skin through an adhesive tape, namely, a whole piece of medical adhesive tape or a plurality of pieces of medical adhesive tapes are taken to cover the joint at the same time, and then other parts of the adhesive tape or the adhesive tape are pasted on the nearby skin, so the position fixation of the joint and the catheter/cannula can be realized through the adhesive tape or the adhesive tape.

Because the catheter/cannula is connected to the axis of the joint, after the catheter/cannula is fixed, the catheter/cannula and the skin are in a state similar to a raised state, and in order to prevent the catheter/cannula from pulling the punctured skin or pulling the jack large, a large relative abutting force needs to be generated between the joint and the skin to better prevent the joint from moving, but in the process, the joint can generate a large pressure on the part of the skin contacting the joint, so that the use comfort is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a and needle is kept somewhere to artery, it can reduce local oppression sense to improve use comfort, and effectively prevent the arterial blood outflow.

The embodiment of the utility model is realized like this: and an arterial indwelling needle provided with a one-way blocking device, comprising:

the connector comprises a first connector, a second connector and a connecting piece, wherein a Y-shaped communicating groove is formed in the first connector, the communicating groove comprises a linear first groove body and a second groove body communicated with the middle of the first groove body, two ends of the first groove body are located on the same side of the first connector, a first protective plug is arranged in the first groove body, and a second protective plug is arranged in the second groove body;

the sleeve is communicated with one end of the first groove body, and the end part of the first groove body connected with the sleeve is positioned between the sleeve and the second groove body;

the needle plug is provided with a needle core.

In the preferred embodiment of the present invention, the second tank body comprises a straight cylindrical infusion part and an arc-shaped transition part, the second protective plug is located in the infusion part, the second protective plug is close to the infusion part, a set distance is provided between the ends of the transition part, and the two ends of the transition part are respectively communicated with the infusion part and the first tank body.

In a preferred embodiment of the present invention, one end of the second protective plug is located in the infusion part, and a plane of the other end is coplanar with a plane of the side part of the first connector.

In a preferred embodiment of the present invention, a side of the first joint connected to the sleeve is planar.

In the preferred embodiment of the present invention, the two sides of the first joint are provided with first positioning pieces, and the plane where the first positioning pieces are located is coplanar with the plane where the first joint is close to one side of the sleeve.

In the preferred embodiment of the present invention, the first joint is provided with two second positioning pieces at an end away from the sleeve, the plane where the second positioning pieces are located is coplanar with the plane where the first joint is close to one side of the sleeve, and the first groove is located between the ends of the two second positioning pieces.

In a preferred embodiment of the present invention, the first joint is provided with an anti-slip portion on an outer wall thereof.

In the preferred embodiment of the present invention, the anti-slip part is provided with two, the anti-slip part is symmetrically located at two sides of the middle part of the first joint.

In a preferred embodiment of the present invention, the infusion apparatus further comprises a second joint, wherein an infusion tube and an infusion needle communicated with the infusion tube are respectively disposed on two sides of the second joint, and the infusion needle can be in interference fit with the second protective plug.

In a preferred embodiment of the present invention, the second joint is provided with a first connecting tube communicating with the infusion needle and away from one side of the infusion needle, and the end of the infusion tube is provided with a second connecting tube capable of being in interference fit with the first connecting tube.

The embodiment of the utility model provides a beneficial effect is: before use, the needle core is positioned in the first groove body, the needle core is in a linear state, the needle plug is positioned outside the first connector, when an indwelling needle is arranged, the needle core drives the sleeve to penetrate through skin and blood vessels, after the sleeve is properly positioned, the needle plug is pulled in the opposite direction, and the needle plug drives the needle core to return; after the needle core is drawn out, an external needle can pass through the second protective plug and then infuse into the inner cavity of the first connector, namely the communicating groove and the sleeve; after the transfusion is finished, even if the needle head is pulled out, the first protective plug and the second protective plug can still prevent the blood from flowing out to the outside, so that the blood pollution is prevented.

Wherein, because the two ends of the first groove body are positioned on one side of the first joint, and the sleeve is also connected on the side of the first groove body, so that when the indwelling needle is punctured, the indwelling needle is first rotated so that the side is directed toward the skin, and at the same time, after the puncture of the indwelling needle is made to a proper position, the cannula is almost penetrated into the skin, and the sleeve part positioned outside the skin is closely attached or attached to the skin, so when the position of the indwelling needle is fixed, although it is also necessary to fix the position of the first connector by means of a film or strip, since the degree or state of lifting between the cannula and the skin is small, therefore, only a small amount of adhesive sheets or adhesive tapes are needed to fix the first joint, the extrusion acting force of the first joint on the skin is reduced, the oppressive feeling of the skin in contact with the first joint is reduced, and the use comfort is improved.

The inner cavity of the end part of the second groove body far away from the first groove body is positioned at the axle center or the center of the first connector, so that when an external needle head is used for transfusion, the needle head can conveniently penetrate through the second protective plug for transfusion, and the needle head can also be conveniently separated from the first connector. When the medical indwelling needle is used for the first time, an external needle head penetrates through the second protective plug (the position of the needle core is kept motionless at the moment), then a medical liquid is input into the first connector through the needle core, after air in the first connector is discharged through the medical liquid, the space between the first protective plug and the sleeve in the second groove body are filled with the medical liquid, the indwelling needle penetrates into a blood vessel, the diameter of the needle core is slightly smaller than that of the sleeve, and a passage for the medical liquid to pass through is arranged between the needle core and the sleeve.

More preferably, first protection stopper is located the part department that is close to first cell body and second cell body intercommunication, and when using for the first time like this, the liquid medicine can be better be full of the space between first protection stopper and the sleeve pipe in the first cell body.

Or, first protection stopper is provided with two, and one of them is located the intercommunication department of first cell body and second cell body, and another is located first cell body and keeps away from sheathed tube tip, also is located the tip of first joint simultaneously, so alright breed the bacterium in the first cell body in follow-up use in the fine prevention, also can disinfect to the first protection stopper that is located first joint tip in addition.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a sectional view of an indwelling needle in a ready-to-use state according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an indwelling needle in a ready-to-use state according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of the indwelling needle in an infusion state according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of the indwelling needle in an infusion state according to the embodiment of the present invention;

fig. 5 is an exploded view of the indwelling needle in the infusion state according to the embodiment of the present invention.

Icon: 1. a first joint; 2. a first tank body; 3. a second tank body; 3a, an infusion part; 3b, a transition part; 4. a first protective plug; 5. a second protective plug; 6. a sleeve; 7. a needle plug; 8. a needle core; 9. a first positioning sheet; 10. a second positioning sheet; 11. an anti-slip portion; 12. a second joint; 13. a transfusion tube; 14. an infusion needle; 15. a first connecting cylinder; 16. a second connector barrel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

Examples

Referring to fig. 1 to 5, the present application provides an arterial needle with a unidirectional blocking device, comprising:

the connector comprises a first connector 1, wherein a Y-shaped communication groove is formed in the first connector 1, the communication groove comprises a linear first groove body 2 and a second groove body 3 communicated with the middle of the first groove body 2, two ends of the first groove body 2 are located on the same side of the first connector 1, a first protective plug 4 is arranged in the first groove body 2, and a second protective plug 5 is arranged in the second groove body 3;

the sleeve 6 is communicated with one end of the first tank body 2, and the end part of the first tank body 2 connected with the sleeve 6 is positioned between the sleeve 6 and the second tank body 3;

the needle plug 7 is provided with a needle core 8.

The second groove body 3 comprises a straight cylindrical infusion part 3a and an arc-shaped transition part 3b, the second protective plug 5 is positioned in the infusion part 3a, the second protective plug 5 is close to the infusion part 3a, a set distance is reserved between the end parts of the transition part 3b, and two ends of the transition part 3b are respectively communicated with the infusion part 3a and the first groove body 2.

One end of the second protective plug 5 is positioned in the infusion part 3a, and the plane where the other end is positioned is coplanar with the plane where the side part of the first joint 1 is positioned.

The side of the first connector 1 connected with the sleeve 6 is planar. Two sides of the first joint 1 are provided with first positioning pieces 9, and the plane where the first positioning pieces 9 are located is coplanar with the plane where one side of the first joint 1, which is close to the sleeve 6, is located. One end of the first joint 1, which is far away from the sleeve 6, is provided with two second positioning pieces 10, the plane where the second positioning pieces 10 are located is coplanar with the plane where the first joint 1 is close to one side of the sleeve 6, and the first groove body 2 is located between the end parts of the two second positioning pieces 10.

And an anti-skid part 11 is arranged on the outer wall of the first joint 1. The anti-skid parts 11 are arranged in two numbers, and the two anti-skid parts 11 are symmetrically arranged on two sides of the middle part of the first joint 1.

The infusion device is characterized by further comprising a second joint 12, infusion tubes 13 and infusion needles 14 communicated with the infusion tubes 13 are arranged on two sides of the second joint 12 respectively, and the infusion needles 14 can be in interference fit with the second protective plugs 5. One side of the second joint 12 departing from the transfusion needle 14 is communicated with the transfusion needle 14 and is provided with a first connecting cylinder 15, and the end of the transfusion tube 13 is provided with a second connecting cylinder 16 which can be in interference fit with the first connecting cylinder 15.

Before use, the needle core 8 is positioned in the first groove body 2, the needle core 8 is in a linear state, the needle plug 7 is positioned outside the first connector 1, when an indwelling needle is arranged, the needle core 8 drives the sleeve 6 to penetrate through skin and blood vessels, after the sleeve 6 is in a proper position, the needle plug 7 is pulled in a reverse direction, and the needle plug 7 drives the needle core 8 to return; after the needle core 8 is drawn out, the external needle can pass through the second protective plug 5 and then infuse into the inner cavity of the first connector 1, namely the communicating groove and the sleeve 6; after the transfusion is finished, even if the needle head is pulled out, the first protective plug 4 and the second protective plug 5 can still prevent the blood from flowing out to the outside, so that the blood pollution is prevented.

Wherein, because the two ends of the first groove body 2 are positioned on one side of the first connector 1, and the sleeve 6 is also connected on the side of the first groove body 2, when the indwelling needle is punctured, the indwelling needle is firstly rotated to make the side face the skin, and after the indwelling needle is punctured to a proper position, the sleeve 6 almost penetrates into the skin, and the part of the sleeve 6 positioned outside the skin is close to or attached to the skin, therefore, when the indwelling needle is fixed, although the position of the first connector 1 is fixed by the rubber sheet or the adhesive tape, because the upwarping degree or state between the sleeve 6 and the skin is very small, only a small amount of rubber sheet or the adhesive tape is needed to fix the first connector 1, and the extrusion acting force of the first connector 1 to the skin is reduced, thereby reducing the oppression feeling of the skin contacting part of the first connector 1, meanwhile, the use comfort is improved.

The inner cavity of the end part of the second groove body 3 far away from the first groove body 2 is positioned at the axle center or the center of the first joint 1, so when an external needle is used for transfusion, the external needle can conveniently penetrate through the second protective plug 5 for transfusion, and the needle can also be conveniently separated from the first joint 1. When the medical needle is used for the first time, an external needle head penetrates through the second protective plug 5, the position of the needle core 8 is kept still, then medical liquid is input into the first connector 1 through the needle core 8, after air in the first connector 1 is exhausted through the medical liquid, the diameter of the needle core 8 penetrating into a blood vessel is slightly smaller than that of the sleeve 6 under the condition that the medical liquid is filled in the second groove body 3, the space between the first protective plug 4 and the sleeve 6 in the first groove body 2 and the sleeve 6 is reserved, and a passage for the medical liquid to pass through is arranged between the needle core 8 and the sleeve 6.

More preferably, the first protective plug 4 is located at a position close to the communication part of the first slot body 2 and the second slot body 3, so that when the first protective plug is used for the first time, the liquid medicine can better fill the space between the first protective plug 4 and the sleeve 6 in the first slot body 2.

Or, first protection stopper 4 is provided with two, and one of them is located the intercommunication department of first cell body 2 and second cell body 3, and another is located the tip that first cell body 2 kept away from sleeve pipe 6, also is located the tip of first joint 1 simultaneously, so alright in order can be fine prevent to breed the bacterium in the first cell body 2 in the follow-up use, also can disinfect to the first protection stopper 4 that is located the tip of first joint 1 moreover.

When the transfusion is performed, the needle or transfusion needle 14 is transfused through the second protective plug 5, and at this time, because the second protective plug 5 has a space with the end of the transfusion portion 3a, the needle or transfusion needle 14 can be normally located in the space and used for delivering the liquid medicine. Meanwhile, the transition part 3b is arc-shaped, so that the resistance of the liquid medicine flowing in the second groove body 3 can be well reduced, and the liquid medicine can be conveniently circulated.

The above-mentioned needle is understood to be a needle commonly used in the market for transfusion, i.e. a conventional needle for directly transfusing the human body, which can pass through the second protective plug 5 in use, and only needs to slightly pass through the second protective plug 5, and the position of the needle or the transfusion needle 14 can be maintained by the static friction force between the needle or the transfusion needle and the second protective plug 5.

The first connector 1 is attached to one side of the skin to be flat, and meanwhile, the first positioning piece 9 and the second positioning piece 10 are also attached to the skin, so that the flat structure of the first connector 1, the first positioning piece 9 and the second positioning piece 10 can increase the total contact area between the indwelling needle and the skin, when the first connector 1 is under the same pressure, the pressure generated between the indwelling needle and the skin is smaller due to the first connector 1, the first positioning piece 9 and the second positioning piece 10, and the local compression feeling of the skin can be further reduced. Moreover, when the position of the first joint 1 is fixed by the adhesive tape or the adhesive tape, the first positioning sheet 9 and the second positioning sheet 10 can be fixed at the same time, and the specific operation is that the first positioning sheet 9 and the second positioning sheet 10 are tightly attached to the skin by the adhesive tape or the adhesive tape, so that the whole fixed range of the remaining needle can be enlarged, thereby improving the position stability of the remaining needle, meanwhile, because the first positioning sheet 9 and the second positioning sheet 10 are both in a sheet shape, when the adhesive tape or the adhesive tape is attached to the first positioning sheet 9/the second positioning sheet 10 and the skin, the height difference between the adhesive tape/the adhesive tape and the skin is smaller, the total bonding area between the adhesive tape/the skin is larger, thereby better preventing the separation between the adhesive tape/the skin, the position stability of the adhesive tape/the adhesive tape is better, and the position fixing effect of the first positioning sheet 9/the second positioning sheet 10 is better, at the same time, the position stability of the first joint 1 is also improved.

In actual production and use, the indwelling needle used at different parts of the human body has different shapes, so that the first joint 1, the first positioning sheet 9 and the second positioning sheet 10 can be better attached to the part of the body where the body is used, specifically, if the indwelling needle is used on the back of the hand, the first positioning sheet 9, the first joint 1 and the second positioning sheet 10 are on a relatively flat surface, and if the indwelling needle is used on the arm, the first positioning sheet 9, the first joint 1 and the second positioning sheet 10 are on a more arc surface, so that the indwelling needle can be better attached to the arm.

When an external needle or infusion needle 14 passes through the second protective plug 5, the nurse can hold the needle or infusion needle 14 with one hand and fix the position of the first connector 1 with the other hand through the anti-slip part 11, so as to prevent the position of the first connector 1 from moving and even injuring the patient. Similarly, when the needle head or the infusion needle 14 is separated from the second protective plug 5, the position of the first connector 1 can be fixed through the antiskid part 11; because the antiskid part 11 is located at the middle position of the first joint 1, the position of the first joint 1 can be maintained through the antiskid part 11 no matter when the needle head/infusion needle 14 is inserted or pulled out, and the like. Moreover, since the anti-slip parts 11 are located at both sides of the first connector 1, the first connector 1 can be prevented from twisting to a certain side and even damaging skin and blood vessels when the needle head/infusion needle 14 is pulled out or pulled out, thereby further improving the use safety.

More preferably, the infusion is performed through the second connector 12; when in transfusion, the outside of the second protective plug 5 is disinfected firstly, and at the moment, because the side part of the second protective plug 5 is flush with the end part of the first connector 1, the disinfection by wiping alcohol can be conveniently, quickly and comprehensively carried out; then, the nurse moves the second connector 12 and the infusion needle 14, the infusion needle 14 penetrates through a hole formed in the second protective plug 5 until the second connector 12 abuts against the second protective plug 5, the liquid medicine enters the infusion tube 13 through the medicine bag or the medicine bottle, then enters the infusion needle 14 and the communicating groove, and finally enters the blood vessel of the patient through the sleeve 6. After the transfusion is finished, the transfusion needle 14 is pulled out of the second protective plug 5 through the second connector 12, and at the moment, the second protective plug 5 blocks the middle hole under the elastic action to prevent blood and liquid medicine from flowing out.

Wherein, in a further embodiment, the end of the second protective plug 5 extends out of the first connector 1, so that the second connector 12 is abutted against the second protective plug 5 when the infusion is performed, and thus, in the infusion process, the second protective plug 5 can also play a role in limiting the second connector 12, thereby improving the position stability of the second connector 12 and simultaneously improving the infusion stability. Of course, if the end of second protective plug 5 is flush with the end of first connector 1, second connector 12 may also be moved so that second connector 12 interferes with first connector 1 and second protective plug 5, which may also improve and ensure the positional stability of second connector 12 and infusion needle 14.

The infusion tube 13 and the second connector 12 are detachably connected, and the detachable mode can be as follows: the diameter of the first connecting cylinder 15 is larger than that of the second connecting cylinder 16, and the second connecting cylinder 16 can be connected to the inner wall of the first connecting cylinder 15 in an interference fit manner; it can also be: the diameter of the second connector barrel 16 is greater than the diameter of the first connector barrel 15 and the first connector barrel 15 may be attached to the inner wall of the second connector barrel 16 in an interference fit. However, in any case, the first connecting cylinder 15 and the second connecting cylinder 16 are both sealably connectable, so that both can stably deliver the liquid medicine, and the difficulty in production is small, and the difficulty in producing and reassembling the respective components separately is small compared to directly producing the whole.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An arterial indwelling needle provided with a one-way blocking device, comprising:

the connector comprises a first connector (1), wherein a Y-shaped communication groove is formed in the first connector (1), the communication groove comprises a linear first groove body (2) and a second groove body (3) communicated with the middle of the first groove body (2), two ends of the first groove body (2) are located on the same side of the first connector (1), a first protective plug (4) is arranged in the first groove body (2), and a second protective plug (5) is arranged in the second groove body (3);

the sleeve (6) is communicated with one end of the first tank body (2), and the end part of the first tank body (2) connected with the sleeve (6) is positioned between the sleeve (6) and the second tank body (3);

the needle plug (7) is provided with a needle core (8).

2. The arterial indwelling needle according to claim 1, wherein the second channel (3) comprises a straight-tube-shaped infusion part (3a) and an arc-shaped transition part (3b), the second protective plug (5) is located in the infusion part (3a), a set distance is provided between the second protective plug (5) and the end part of the infusion part (3a) close to the transition part (3b), and both ends of the transition part (3b) are respectively communicated with the infusion part (3a) and the first channel (2).

3. An arterial needle according to claim 2, characterized in that said second protective plug (5) has one end in said infusion part (3a) and the other end lying in a plane coplanar with the plane of the side of said first joint (1).

4. The arterial needle according to claim 1, characterized in that the side of the first connector (1) connected to the cannula (6) is planar.

5. The arterial needle according to claim 4, characterized in that the first joint (1) is provided with first positioning sheets (9) at both sides, the plane of the first positioning sheets (9) is coplanar with the plane of the first joint (1) at the side close to the cannula (6).

6. The arterial indwelling needle according to claim 4 or 5, wherein one end of the first connector (1) facing away from the cannula (6) is provided with two second positioning pieces (10), the plane of the second positioning pieces (10) is coplanar with the plane of the first connector (1) on the side close to the cannula (6), and the first groove body (2) is located between the ends of the two second positioning pieces (10).

7. The arterial needle according to claim 6, characterized in that the first joint (1) is provided with a non-slip part (11) on its outer wall.

8. The arterial needle according to claim 7, characterized in that said non-slip part (11) is provided in two, two of said non-slip parts (11) are symmetrically located on both sides of the middle of said first joint (1).

9. The arterial retention needle according to claim 1, characterized by further comprising a second joint (12), wherein a transfusion tube (13) and an infusion needle (14) communicated with the transfusion tube (13) are respectively arranged at two sides of the second joint (12), and the infusion needle (14) can be in interference fit with the second protective plug (5).

10. The arterial retention needle according to claim 9, characterized in that the side of the second connector (12) facing away from the infusion needle (14) communicates with the infusion needle (14) and is provided with a first connecting cylinder (15), and the end of the infusion tube (13) is provided with a second connecting cylinder (16) which can be in interference fit with the first connecting cylinder (15).

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