CN203591491U - Retention needle with needle tip protection mechanism - Google Patents

Abstract

The utility model discloses a retention needle with a needle point protection mechanism, which belongs to the medical and health field, and comprises an outer cylinder with a retention needle, a needle seat provided with a puncture needle, an external infusion head connected to the side wall of the outer cylinder, and an outer cylinder The inner cavity is provided with an air valve, and the air valve isolates the inner cavity of the outer cylinder into an infusion cavity at the front end communicating with an external infusion head, and an accommodating cavity at the rear end for accommodating the needle seat; There is a groove; the air valve is equipped with a chuck and a protective head connected with the chuck, and the center of the chuck is provided with a hole for the puncture needle to enter, and the shape of the hole is the same as the cross section of the puncture needle with the groove. When the needle is withdrawn, the puncture needle will take out the protective head and be wrapped. The utility model is simple and quick to use, convenient and quick to insert and withdraw the needle, prevents blood from flowing back, and at the same time facilitates the external connection of other syringes or transfusions, reducing the possibility of medical personnel being stabbed.

Description

A retention needle with a needle point protection mechanism

technical field

The utility model relates to consumables in the medical and health field, in particular to a retention needle with a needle point protection mechanism.

Background technique

With the extension of humanistic care technology, how to ensure the safety of patients, reduce the pain of patients, and reduce the chance of medical workers being stabbed in the process of puncture needles has become the focus of research and development of puncture needle consumables. Retention is aimed at patients who need multiple puncture injections, which reduces the pain of patients to a certain extent. At present, retained needle puncture injection is often used before surgery, which can ensure that the anesthesiologist administers the drug according to the vital signs of the patient. However, there are some disadvantages in the existing retention needles on the market. Some retention needles need to be connected to positive pressure connectors. If they are not connected in time, it will easily lead to the return of venous blood and damage the sterile cotton, which will also cause panic in patients; on the other hand , During the puncture process, it is necessary to withdraw the needle with one hand and insert the needle with the other hand, which cannot tighten the patient's skin, and it is easy to puncture the blood vessel, which aggravates the pain of the patient. In addition, during needle withdrawal and follow-up treatment, medical workers are easily stabbed by needles.

Utility model content

Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a retention needle that prevents backflow, facilitates needle insertion, and has a needle tip protection mechanism to prevent medical workers from being stabbed.

Technical solution: In order to achieve the above purpose, a retention needle with a needle point protection mechanism of the utility model includes an outer cylinder with a retention needle at the front end, and a needle seat with a puncture needle at the front end, and the side wall of the outer cylinder is connected to There is an external infusion head, and the inner cavity of the outer cylinder is provided with an air valve, and the air valve isolates the inner cavity of the outer cylinder into an infusion chamber whose front end communicates with the external infusion head, and an accommodating cavity at the rear end for accommodating the needle seat; The puncture needle is provided with a groove along the direction of needle insertion except for the needle tip; the air valve is provided with a chuck and a protective head connected with the chuck, and the center of the chuck is provided with a needle for the puncture needle to enter. The shape of the hole is adapted to the cross-section of the puncture needle with the groove, and the chuck is movably connected with the inner wall of the outer cylinder; the length of the protective head is greater than the length from the tip of the puncture needle to the groove .

The utility model utilizes the chuck and the puncture needle with the groove to form a mutual position-limiting effect. There is no effect on the needle insertion process. When the needle is withdrawn, because the needle tip of the puncture needle has no slot, when it touches the chuck, the chuck will be taken out from the air valve and connected to the protective head behind the chuck. The material of the protective head is required to be easy to puncture, and the tissue is dense. After the needle tube passes through, the original opening can be closed to ensure that a spherical protective mechanism is formed on the needle head after the needle is pulled out to prevent medical staff from being stabbed.

The air valve is an air valve made of rubber or sponge material that is fixed and sealed in the inner cavity of the outer cylinder. The protective head is made of dense sponge material. The air valve of the utility model utilizes rubber and sponge as dense materials, on the one hand, it is convenient for the puncture needle to puncture, and in addition, after the needle is withdrawn, it can block the needle port and prevent backflow.

In order to facilitate medical workers to withdraw the puncture needle while inserting the needle, the side wall of the outer cylinder is provided with a push handle for facilitating needle insertion, and the front end of the needle holder extends outward to form a convex ring.

Further, the external infusion head is connected with a hose, and the other end of the hose is connected with an external infusion valve. The external infusion valve can have multiple interfaces according to the needs of the user, for convenient injection of anesthetics or other medicaments.

In order to assist the external infusion valve for infusion and facilitate the secondary injection, a safety clip is provided on the flexible tube.

Beneficial effects: the retention needle with a needle tip protection mechanism of the utility model is simple and quick to use, convenient and quick to insert and withdraw the needle, prevent blood backflow, and at the same time facilitate external connection with other syringes or infusions, reducing the possibility of medical staff being stabbed .

Description of drawings

Figure 1 is a schematic structural view of the combination of the outer cylinder, the retention needle and the external infusion valve of the present invention;

Fig. 2 is a schematic structural view of the needle base and the puncture needle of the present invention;

Fig. 3 is a schematic structural view of the combination of the outer cylinder, the retention needle, the needle seat and the puncture needle of the present invention;

Fig. 4 is a schematic diagram of the structure of the needle tip in Fig. 3;

Fig. 5 is a schematic cross-sectional view of A-A in Fig. 3;

Fig. 5 is a schematic cross-sectional view of B-B in Fig. 4 .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described further.

As shown in Figures 1 to 6, a retention needle with a needle tip protection mechanism of the present invention includes an outer cylinder 2 with a retention needle 1 at the front end, and a needle seat 4 with a puncture needle 3 at the front end, and the outer cylinder 2 The side wall is connected with an external infusion head 5, and the inner cavity of the outer cylinder 2 is provided with an air valve 6. The air valve 6 isolates the inner cavity of the outer cylinder 1 into an infusion chamber 7 whose front end communicates with the external infusion head 5, and a rear end for accommodating Accommodating cavity 8 of needle seat 4; puncture needle head 3 is provided with a groove 9 along the direction of needle insertion except for the needle tip; air valve 6 is provided with a chuck 10 and a protective head 11 connected with chuck 10, and the chuck The center of the disc 10 is provided with a hole 12 for the puncture needle 3 to enter, the shape of the hole 12 is adapted to the cross section of the puncture needle 3 with the groove 9, the chuck 10 is flexibly connected with the inner wall of the outer cylinder 2; the length of the protective head 11 It is longer than the length from the tip of the puncture needle 3 to the groove 9, so as to ensure that the tip of the needle can be completely wrapped by the protective head 11.

The air valve 6 is an air valve made of rubber or sponge material that is fixed on the inner chamber of the outer cylinder 2 and is sealed. Protective head 11 is the protective head that compact spongy material is made. The side wall of the outer cylinder 2 is provided with a push handle 12 for facilitating needle insertion, and the front end of the needle holder 4 extends outward to form a convex ring 13 .

Further, the external infusion head is connected with a hose 14 , and the other end of the hose 14 is connected with an external infusion valve 15 . The external infusion valve 15 can have multiple ports according to the needs of the user, for convenient injection of anesthetics or other medicines.

In order to assist the external infusion valve for infusion and facilitate the secondary injection, the hose 14 is provided with a safety clip 16 .

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (6)

1. A retention needle with a needle tip protection mechanism, comprising an outer cylinder with a retention needle at the front end, and a needle holder with a puncture needle at the front end, characterized in that: the side wall of the outer cylinder is connected with an external infusion head, the outer The inner cavity of the cylinder is provided with an air valve, and the air valve isolates the inner cavity of the outer cylinder into an infusion chamber whose front end communicates with the external infusion head, and an accommodating chamber at the rear end for accommodating the needle seat; The puncture needle is provided with a groove along the direction of needle insertion except for the needle tip; A chuck and a protective head integrated with the chuck are arranged inside the air valve, and a hole for the puncture needle to enter is arranged in the center of the chuck, and the shape of the hole is the same as the cross section of the puncture needle with the groove. Compatibly, the chuck is movably connected with the inner wall of the outer cylinder; The length of the protective head is greater than the length from the tip of the puncture needle to the groove. 2. A retention needle with a needle tip protection mechanism according to claim 1, characterized in that: the air valve is an air valve made of rubber or sponge material fixed and sealed in the inner cavity of the outer cylinder. 3. A retention needle with a needle tip protection mechanism according to claim 1, characterized in that: the protective head is made of dense sponge material. 4. A retaining needle with a needle tip protection mechanism according to claim 1, characterized in that: the side wall of the outer cylinder is provided with a push handle for facilitating needle insertion, and the front end of the needle seat extends outward to form a convex lock up. 5. A retention needle with a needle tip protection mechanism according to claim 1, characterized in that: the external infusion head is connected to a hose, and the other end of the hose is connected to an external infusion valve. 6. A retention needle with a needle tip protection mechanism according to claim 5, characterized in that: said hose is provided with a safety clip.

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