CN102989058A - Needle point shielding type anti-backflow venous indwelling needle - Google Patents

Abstract

The invention relates to a needle-tip shielded anti-reflux venous indwelling needle, which relates to a transfusion medical device, comprising the following accessories: a needle tube, a catheter, a catheter seat, a needle core, a reflux valve, a double-wing needle seat and a needle-tip shielding device. The present invention is an indwelling needle with good safety performance and convenient operation. After venipuncture, the needle tube is also completely protected in the guide groove, so as to avoid injury to medical staff or others due to the exposure of the needle tube, and to prevent blood backflow. Avoid blood contamination from contact with outside air.

Description

Needle tip shielded anti-reflux venous indwelling needle

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technical field

The product of the invention relates to medical equipment and supplies, in particular to an intravenous indwelling needle used for intravenous infusion, blood transfusion, etc. of the human body.

technical background

The indwelling needle is generally used for clinical infusion of medicinal liquid to patients, because it has the advantages of reducing the number of blood vessel punctures, reducing exudation, and enabling rapid infusion of medicinal liquid, which is beneficial to alleviate the pain of patients and facilitate rescue.

The disadvantage of the existing indwelling needle is that after venipuncture, the needle tube is pulled out, and the sharp needle tube after use will be exposed outside. Therefore, when cleaning and destroying the indwelling needle tube, it is easy to stab medical staff or other people, resulting in crossover. Infect. At present, the needle tip shielding indwelling needle is based on the addition of a needle tip shielding device on the basis of the previous ordinary indwelling needle. After the indwelling needle is used up, the needle tip shielding device can effectively protect the sharp needle tube from being exposed, thus fundamentally preventing medical care from Occurrence of personnel being stabbed by a puncture needle and infection.

Another disadvantage of the existing indwelling needles is that blood backflow is prone to occur, resulting in pollution caused by contact between blood and outside air. At present, the anti-reflux indwelling needle is based on the structure of the ordinary indwelling needle in the past. A reverse flow valve is added, and wedge-shaped wings are added to the catheter base, so that it can prevent blood backflow clinically, prevent blood from contacting with the outside air and cause pollution, and is convenient for clinical use. Blood collection.

Contents of the invention

The purpose of the present invention is to provide an indwelling needle with good safety performance and easy operation. After venipuncture, the needle is withdrawn along the guide groove, and the needle tube is also completely protected in the guide groove, so as to avoid injury to doctors and nurses due to needle tube exposure. personnel or others. The present invention can also provide an indwelling needle capable of preventing blood backflow, avoiding pollution caused by contact between blood and outside air, and easy to operate.

The object of the present invention is achieved in that it comprises: a needle tube, a catheter, a catheter adapter, and the catheter adapter is divided into two parts, which are respectively a catheter adapter front seat and a catheter adapter rear seat. The needle core, the reverse flow valve and the needle tip shielding device, the needle tip shielding device includes a double-wing needle seat, a positioning block and a guide groove. A detachable needle point shielding device is installed at the rear end of the catheter base, and the needle point shielding device is divided into three parts, which are respectively a positioning block part, a guide groove part and a double-winged needle seat part. One end of the double-wing needle seat is assembled with the needle tube, and the other end is provided with a clamping position, which is convenient for clamping into the clamping ring to play a limiting role; the guide groove part is provided with a guide groove, which is convenient for indwelling needles. As the double-winged needle holder slides in the guide groove sleeve, when it slides to the rear end of the guide groove, the clamping position of the double-winged needle holder is snapped into the snap ring, so that the position limit plays the role of restricting the movement, and the needle tube is completely protected at this time. In order to avoid hurting medical staff or others due to needle tube exposure.

The further technical solution of the present invention is that a reverse flow valve is installed in the catheter seat, and the reverse flow valve is fixedly assembled in the inner cavity of the catheter seat. blood vessels, but the blood cannot flow back out, so as to avoid the pollution caused by the contact between the blood and the outside air, and play the role of preventing backflow. There are two wedge wings symmetrically arranged on the catheter seat. The wedge wings have the function of opening and closing the reverse flow valve. In the free state, they can close the reverse flow valve. When the wedge wings are pressed against each other, they can open the reverse flow valve. Function: open the reverse flow valve to facilitate clinical blood collection.

The present invention adopts the above-mentioned technical scheme. After the indwelling needle is used, the exposed needle tube can be snapped into the snap ring through the locking position on the double-winged needle seat, thereby playing a role of stable locking and limiting, so that the needle tube can be completely protected in the guide. In the cover, achieve safety, avoid stabbing medical staff or others, and reduce cross-infection and contamination. During clinical use, the phenomenon of blood backflow can be avoided. And in the free state, it has the function of closing the reverse flow valve, so that the blood cannot flow back out, so as to avoid the pollution caused by the contact between the blood and the outside air, and play the role of preventing the reverse flow; The valve facilitates clinical blood collection.

The invention is a kind of indwelling needle with good safety performance and convenient operation. After venipuncture, the needle is withdrawn along the guide groove, and the needle tube slides in the guide sleeve with the double-winged needle seat. When sliding to the rear end of the guide groove, the wings The clamping position of the needle seat part is snapped into the snap ring, so as to limit the movement, the needle tube is stably fixed, and the needle tube is also completely protected in the guide groove at this time, so as to avoid hurting medical staff or others due to the exposure of the needle tube. The present invention can also prevent the performance of blood reflux, avoid the pollution caused by the contact of blood with the outside air, and the indwelling needle is easy to operate; in the clinical use process, the blood will not flow back, and if you want to collect blood, you only need to press against the catheter seat Only the wings can be used to avoid clinical blood backflow.

Below in conjunction with accompanying drawing and embodiment example, product of the present invention is described further:

Description of drawings

Fig. 1 is an assembly diagram of the structure of the needle-tip shielded anti-reflux venous indwelling needle.

      Figure 2 is a safety schematic diagram of the needle-tip shielded anti-reflux venous indwelling needle after use.

Figure 3 is the anti-reflux assembly structure diagram of the needle-tip shielded anti-reflux venous indwelling needle.

Fig. 4 is a schematic diagram of the clamping position of the double-wing needle holder of the new structure.

Figure 5 is a schematic diagram of the snap ring of the guide groove of the new structure.

Fig. 6 is a schematic diagram of the reverse flow valve with the new structure.

Fig. 7 is a schematic diagram of the reverse flow valve with the new structure.

Detailed ways

As shown in sectional view 1, the needle tip shielded anti-reflux venous indwelling needle assembly includes: needle tube 1, catheter 2, catheter seat front seat 3, catheter seat rear seat 6, needle core 4, reflux valve 5, needle tip shielding device including positioning block 7, Double-wing needle seat 8, guide groove 9. A detachable needle tip shielding device is installed at the rear end of the catheter base, and the needle tip shielding device is divided into three parts, which are respectively 7 parts of the positioning block, 9 parts of the guide groove and 8 parts of the double-winged needle holder. One end of the double-wing needle seat is assembled with the needle tube, and the other end is provided with a clamping position, which is convenient for clamping into the clamping ring to play a limiting role; the guide groove part is provided with a guide groove, which is convenient for indwelling needles. As the double-winged needle holder slides in the guide groove sleeve, when it slides to the rear end of the guide groove, the clamping position of the double-winged needle holder is snapped into the snap ring, so that the position limit plays the role of restricting the movement, and the needle tube is completely protected at this time. In the guide sleeve, the reverse flow valve is fixedly assembled in the inner cavity of the catheter seat. The reverse flow valve is wedge-shaped and duckbill-shaped, which can play the role of a one-way valve. In a free state, the liquid can pass into the blood vessel, but the blood cannot flow back out, so as to avoid blood and The contact with the outside air will produce pollution and play the role of anti-reflux. There are two wedge wings symmetrically arranged on the catheter seat. The wedge wings have the function of opening and closing the reverse flow valve. In the free state, they can close the reverse flow valve. When the wedge wings are pressed against each other, they can open the reverse flow valve. Function: open the reverse flow valve to facilitate clinical blood collection.

For example, the cross-sectional view 2 shows that after use, the exposed needle tube can be snapped into the snap ring through the clamping position on the double-wing needle seat, so as to play a stable locking and limiting role, and the needle tube can be safely, effectively and stably protected in the guide groove Inside. 12 in the sectional view 2 is the clamping position of the double-wing needle holder, 11 in the sectional view 2 is the claw of the guide groove clasp, and 10 in the sectional view 2 is the effect diagram of the clamping position and the claw interlocking.

For example, the sectional view 3 is an anti-reflux catheter adapter assembly, the reverse flow valve 5 is fixedly installed in the inner cavity of the catheter adapter, and the wedge-shaped wings on the catheter adapter can open or close the reverse flow valve. 14 in the sectional view 3 is the wedge-shaped double wings of the catheter adapter, and 13 in the sectional view 3 is the rendering of the anti-reflux catheter adapter assembly.

Shown in sectional view 4 is the double-winged needle holder 8, 15 in Figure 4 is the locking position of the double-winged needle holder, the locking position of the double-winged needle holder is fixed with the claws of the guide groove 9, and 16 in Figure 4 is a wedge-shaped double wing.

18 as shown in FIG. 5 is the snap ring claw of the guide groove 9 , and 17 in FIG. 5 is the connection position for connecting the connection position 17 and the positioning block 7 .

19 shown in FIG. 6 is a wedge shape on the reverse flow valve 5 , and 20 in FIG. 7 is a duckbill shape on the reverse flow valve 5 .

Claims (3)

1. needle point protected type Anti-reflux venous indwelling needle, it is characterized in that: it comprises: needle tubing, conduit, catheter block, nook closing member, reflux valve and needle tip shielding device, needle tip shielding device comprises double-vane needle stand, locating piece and guide groove, in the catheter block rear end separable needle tip shielding device is housed, needle tip shielding device is divided into three parts, be respectively the locating piece part, guide groove part and double-vane needle stand part, double-vane needle stand part one end and needle tubing assembling, the other end is provided with screens, and screens is convenient to snap in and is played position-limiting action in the snap ring; Be provided with guide groove on the guide groove part, be convenient to remaining needle and use in the withdraw of the needle process, needle tubing slides in the guide groove cover with the double-vane needle stand, and when sliding into the guide groove rear end, the screens of double-vane needle stand part snaps in the snap ring, thus the spacing effect of playing moving-limiting.

2. needle point protected type Anti-reflux venous indwelling needle as claimed in claim 1, it is characterized in that: reflux valve is housed in catheter block, reflux valve fixedly is assembled in the catheter block inner chamber, reflux valve is for carving the piece duckbill, can play the effect of check valve, be arranged with two about on the catheter block and carve the piece double-vane, carving the piece double-vane has the effect of opening reflux valve and closing reflux valve.

3. needle point protected type Anti-reflux venous indwelling needle as claimed in claim 1 is characterized in that: be that catheter block is divided into two parts, be respectively catheter block front stall and catheter block back seat.

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