WO2019024073A1 - Safety indwelling needle - Google Patents

Abstract

Provided is an indwelling needle with a safe structure, the needle comprising a cover (1), a clamping component (2), a needle cylinder (3), an inner piston (4), a soft needle (5), a soft needle base (6), a puncture needle (7), a puncture needle base (8), a hose (9), a sleeve (10) and a sleeve base (11), wherein the cover (1) is in sliding fit with the needle cylinder (3), the clamping component (2) is installed on the needle cylinder (3), the inner piston (4) is installed in the needle cylinder (3), the soft needle (5) and the soft needle base (6) are integrally formed, the soft needle (5) is sleeved in the inner piston (4), and the soft needle (5) is fixedly installed in the needle cylinder (3); the puncture needle (7) is fixedly connected to the puncture needle base (8) and the hose (9), the puncture needle (7) is in sliding fit with the needle cylinder (3), and the puncture needle (7) is in sliding fit with the soft needle (5); and one end of the sleeve (10) is snap fitted to the puncture needle base (8), and the other end of the sleeve (10) and the sleeve base (11) are fixed by a bolt. After the puncture needle (7) is withdrawn, a hook (38) of the needle cylinder (3) is trapped in a buckling groove (81) of the puncture needle base (8) to form a locking state, so that the puncture needle (7) is wrapped in the needle cylinder (3). The indwelling needle is easy and convenient to use, rapid and convenient to feed and withdraw, has low production costs and can be widely popularized.

Description

Safety indwelling needle Safety indwelling needle

Technical field

 The invention discloses a safe indwelling needle and belongs to the technical field of medical equipment.

Background technique

Indwelling needle refers to a needle that penetrates into a blood vessel for a long time and can be placed in a blood vessel for a long time, which can alleviate the pain of multiple injections of patients, especially for patients with edema.

Intravenous indwelling needle is a commonly used medical device in nursing work, which has the advantages of convenient use and reduced the number of punctures for patients, thereby reducing the repeated puncture during clinical infusion, reducing the puncture pain of the patient and the workload of the clinical nursing staff, thus It has been widely used in today's clinical practice.

Among the existing intravenous indwelling needles, generally include: a puncture needle, an indwelling needle, and an infusion catheter. In use, first, the user inserts the puncture needle through the infusion needle into the injection position of the patient, and then introduces the indwelling needle into the patient's blood vessel through the puncture needle guide, and finally, the puncture needle is withdrawn, leaving the indwelling needle in the patient's blood vessel, and using Apply the film to fix it. When in use, an infusion tube is placed in the indwelling needle for dripping.

Summary of the invention

The invention discloses a low-cost, safe and easy-to-operate indwelling needle, which reduces the situation that the hard needle tube of the indwelling needle is pulled out, stabbed by others, or causes medical personnel to cross-infect or even use the indwelling needle again.

A safety indwelling needle of the present invention includes a cap, a clamping member, a syringe, an inner stopper, a soft needle, a soft needle hub, a puncture needle, a needle hub, a hose, a sleeve and a sleeve.

The cap is slidably engaged with the syringe, and the clamping member is mounted on the syringe. The inner plug is fixedly mounted in the syringe. The soft needle is integrally formed with the soft needle hub. The soft needle is set in the inner plug, and the soft needle is Also fixedly mounted in the syringe, the puncture needle is fixedly mounted with the puncture needle hub and the hose, the puncture needle is slidably engaged with the syringe, the puncture needle is slidably engaged with the soft needle, and one end of the sleeve is connected with the hose The buckle is connected, and the other end of the sleeve is fixed to the sleeve bolt.

The front end of the barrel is provided with a butterfly wing fixing device, and the needle barrel is provided with at least one elastic piece and at least one surface protrusion in a circumferential direction, and the elastic piece and the surface protrusion are spaced apart.

The lower surface of each of the elastic pieces is provided with a hook member.

The outer surface of the front end of the puncture needle holder is provided with a first buckle groove, a convex portion and a second buckle groove.

Specifically, the cap is a circular vertebral body having a small diameter at the front end and a large diameter at the rear end. The front end of the outer surface of the cap is provided with a plurality of vertical protrusions, and the inner surface of the rear end of the cap is provided with a bead.

Specifically, the clamping member is provided with a butterfly-shaped clamping body and a clamping protrusion, and the butterfly-shaped clamping body is integrally formed with the clamping protrusion.

Specifically, the syringe is a cylinder having a small diameter at the front end and a large diameter at the rear end; the front end of the syringe is recessed inwardly with a circular hole having the same center of the syringe, the diameter of the circular hole being larger than the diameter of the soft needle needle; The outer surface of the front end of the barrel is sequentially provided with a first protrusion, a second protrusion and a third protrusion; the first protrusion, the second protrusion and the third protrusion of the front end of the barrel and the inner surface of the rear end of the cap are convex Slip fit.

Specifically, the butterfly wing fixing device is provided with a plurality of curved hooks, one end of the mounting joint is integrally formed with the syringe, and the curved hook of the other end of the mounting joint is buckled on the convex hole of the clamping protrusion. Inside the station.

Specifically, the rear end of the syringe is provided with a stopper.

Specifically, the length of the puncture needle is greater than the length of the soft needle; the length of the syringe is greater than the length of the puncture needle.

The invention also discloses a method for using the safety indwelling needle. After the cap, the puncture needle and the soft needle are opened into the part to be treated, the sleeve body, the puncture needle and the puncture needle holder are outwardly moved away from the syringe by pulling the sleeve. Sliding, the puncture needle gradually leaves the soft needle and enters the inner cavity of the syringe, and after the soft needle leaves the portion to be treated, the puncture needle seat gradually moves backward, and the hook member under the elastic piece of the syringe is trapped in the first buckle groove and behind the syringe barrel. The end body is also buckled into the second buckle groove of the puncture needle seat, so that the puncture needle seat can no longer undergo axial displacement under the blocking action of the first convex portion of the puncture needle seat.

Beneficial effects:

The indwelling needle of the present invention has a simple structure and a clever design. The plurality of convex rings are arranged on the inner surface of the cap, and the first protruding portion, the second protruding portion and the third protruding portion are disposed at the front end of the barrel, and the sliding force of the cap and the syringe is large. The cap will not be scattered randomly, avoiding the danger of puncture needle sticking or contamination.

After the indwelling needle is used, the puncture needle tube is retracted into the syringe, and the axial displacement does not occur again, so that the puncture needle is safely stored, thereby reducing safety hazards.

The indwelling needle of the invention is simple and convenient to use, convenient and quick to remove the needle, and convenient to externally connect other syringes or infusions. The indwelling needle of the invention has low production cost and good generalization.

DRAWINGS

Figure 1 Stereo split diagram of indwelling needle

Figure 2 Schematic diagram of the assembly structure of the indwelling needle

Figure 3 Top view of the indwelling needle

Figure 4 Cross-sectional view of the indwelling needle after assembly

Figure 5 Cap section view

Figure 6 Stereo view of the clamping part

Figure 7 Schematic diagram of the three-dimensional structure of the syringe

Figure 8 A-A cross-section of the indwelling needle when not in use

Figure 9: Cross section of the indwelling needle B-B when not in use

Figure 10 is a perspective view of the indwelling needle when in use

Figure 11 is a cross-sectional view of the A-A surface of the indwelling needle after use

Figure 12 Schematic diagram of the indwelling needle B-B after use.

Reference numeral

1-cap, 2-clamping part, 3-syringe, 4-internal, 5-soft needle, 6-soft needle holder, 7-piercing needle, 8-piercing needle holder, 9-hose, 10-cup Body, 11-seat

21-clamping butterfly part, 22-clamping part bulge

31-first protrusion, 32-second protrusion, 33-third protrusion, 34 butterfly wing mount, 35-spring, 36-block, 37-surface protrusion, 38-hook

81-first buckle groove, 82-first boss portion, 83-second buckle groove

Detailed ways

The technical solutions of the present invention are further illustrated by the following specific embodiments, and the specific descriptions are not limited to the technical solutions of the present invention. Any improvement made by those skilled in the art based on the technical solutions belongs to the present invention. The scope of protection.

In the technical solutions and embodiments of the present invention, the front end refers to a direction that coincides with the direction of the needle tip of the indwelling needle, and the rear end is the opposite direction of the front end.

The indwelling needle structure shown in Figs. 1, 2, 3 and 4. A safety indwelling needle includes a cap (1), a clamping member (2), a syringe (3), an inner stopper (4), a soft needle (5), a soft needle hub (6), a puncture needle (7), Puncture needle hub (8), hose (9), sleeve (10) and sleeve (11).

The cap (1) is slidably engaged with the syringe (3), the clamping member (2) is mounted on the syringe (3), the inner plug (4) is fixed in the syringe (3), and the soft needle (5) is soft. The needle hub (6) is fixedly mounted, and the soft needle (5) is fixedly mounted in the syringe (3), and the puncture needle (7) is fixedly mounted together with the needle hub (8) and the hose (9). The puncture needle (7) is slidably engaged with the syringe (3), and the puncture needle (7) is slidably engaged with the soft needle (5), and one end of the sleeve body (10) is snap-connected with the puncture needle hub (8). The other end of the sleeve (10) is bolted to the sleeve (11).

As shown in FIG. 5, in the present embodiment, the cap (1) is a circular vertebral body having a small front end diameter and a large rear end diameter, and the front end of the outer surface of the cap (1) is provided with a plurality of vertical protrusions, and the cap (1) The inner surface of the rear end is provided with a plurality of beads in turn. The protrusion is provided on the outer surface of the cap to increase the surface friction of the cap.

As shown in FIG. 6, in the present embodiment, the clamping member (2) is provided with a butterfly-shaped clamping body (21) and a clamping protrusion (22), a butterfly-shaped clamping body (21) and a clamping protrusion (22). In one piece, the clamping protrusion is provided with a circular hole which is recessed inward.

As shown in Fig. 7, the syringe (3) of the present embodiment is a cylinder having a small front end diameter and a large rear end diameter. The front end of the barrel is recessed inwardly with a circular hole having the same center as the barrel, and the diameter of the circular hole is larger than the diameter of the soft needle tube. The front end of the front end of the barrel is provided with a first protrusion (31), a second protrusion (32) and a third protrusion (33), and the first protrusion (31) and the second protrusion (32) And the third protrusion (33) is in sliding engagement with the bead of the inner surface of the rear end of the cap. The inner surface of the rear end of the cap and the outer surface of the front end of the barrel are designed to increase the surface friction so that the cap is not easily dropped, thereby preventing the puncture needle from stabbing others and reducing cross infection.

As shown in FIG. 4, the front end of the syringe of the present embodiment is provided with a butterfly wing fixing device (34), and the butterfly wing fixing device (34) is provided with a plurality of curved hooks. One end of the butterfly wing fixture (34) is integrally formed with the syringe (3), and the other end of the fixing device (34) is snapped into the boss of the clamping projection (22).

The barrel of this embodiment is provided with two elastic pieces (35) and two surface protrusions (37) in the circumferential direction, and the elastic piece (35) and the surface protrusions (37) are spaced apart. The shrapnel and the syringe are integrally formed, one side of the shrapnel is connected with the syringe, and the other three sides are not connected with the syringe, so that the shrapnel can be deformed in a certain margin in the radial direction. A stopper (36) is formed at the rear end of the barrel opposite to the elastic piece. The three surface protrusions integrally formed on the surface of the barrel body are designed to increase the surface friction of the barrel, and the medical staff does not easily slide down when holding the needle barrel.

It can be seen from the coating 8 that the first member (38) of the indwelling needle elastic piece of the embodiment and the first buckle groove (81), the convex portion (82) and the second buckle groove (83) on the surface of the needle needle holder seat Set for coaxial.

The indwelling needle of this embodiment is provided with a member (38) on the lower surface of the rear end of each of the elastic pieces (35). A first buckle groove (81), a convex portion (82) and a second buckle groove (83) are sequentially disposed on the outer surface of the front end of the puncture needle holder. The first buckle groove (81), the protrusion portion (82) and the second buckle groove (83) are coaxially disposed. As can be seen from Fig. 11, when the indwelling needle is used, the first member (38) of the lower surface of the barrel elastic piece can be just inserted into the first buckle groove (81), and the stopper body (36) at the rear end of the barrel can be just embedded. Inside the second buckle groove (83).

The length of the puncture needle (7) of the indwelling needle of the present embodiment is larger than the length of the soft needle (5); the length of the syringe (3) is larger than the length of the puncture needle (7). This design allows the puncture needle to penetrate the soft needle and expose part of the puncture needle and the puncture needle to easily enter the part of the patient to be treated. When the puncture needle is completely withdrawn into the syringe, the length of the syringe is larger than the puncture needle. This design allows the puncture needle to "fall back".

When the indwelling needle of the embodiment is not in use, the puncture needle (7) completely penetrates the soft needle (5), and the needle tip is exposed, and most of the puncture needle hub (8) is also covered in the syringe (3), and the cap ( 1) The condom is on the syringe (3).

In the specific use, after opening the cap (1), the puncture needle (7) and the soft needle (5) into the site to be treated, the sleeve (10), the puncture needle (7) and the puncture needle (7) are removed by pulling the sleeve (11). The puncture needle hub (8) slides outwardly away from the syringe (3), the puncture needle (7) gradually leaves the soft needle and enters the inner cavity of the syringe, and the soft needle (5) is retained in the blood vessel. The puncture needle holder (8) gradually moves backward, and the elastic piece (35) undergoes a radial upward deformation under the action of the protrusion on the surface of the puncture needle hub (8), and then gradually pulls the sleeve (11), in the barrel spring piece (35) The lower hook member (38) is caught in the first buckle groove (81), and the stopper body (36) at the rear end of the syringe barrel is also inserted into the second buckle groove (83) of the puncture needle holder, at the puncture needle seat Under the blocking action of the first convex portion (82), the axial position of the puncture needle holder is no longer allowed to occur. The butterfly-shaped grip is fixed to the surface of the patient's skin by a medical tape.

The indwelling needle of the embodiment has a simple structure, a cap, a holding member, a syringe, a soft needle and a soft needle hub, and the puncture needle and the puncture needle are integrally formed structures, so that the cost of manufacturing each component is low. After the indwelling needle is used, the puncture needle tube is completely retracted into the syringe, thereby forming an indwelling needle of a safe structure. The above-mentioned indwelling needle is easy to operate and has a good generalization.

Claims (9)

A safety indwelling needle characterized by comprising a cap (1), a clamping member (2), a syringe (3), an inner stopper (4), a soft needle (5), a soft needle hub (6), Puncture needle (7), needle hub (8), hose (9), sleeve (10) and sleeve (11); The cap (1) is slidably engaged with a syringe (3) mounted on the syringe (3), the inner plug being fixedly mounted in the syringe (3), the soft needle (5) Formed integrally with the soft needle hub (6), the soft needle (5) is set in the inner plug (4), and the soft needle (5) is slidably engaged with the syringe (3), the puncture needle (7) and the puncture The needle hub (8) and the hose (8) are fixedly mounted together, the puncture needle (7) is slidably engaged with the syringe (3), and the puncture needle (7) is slidably engaged with the soft needle (5), the sleeve body One end of (10) is snap-connected with the needle hub (8), and the other end of the sleeve body (10) is bolted to the sleeve (11); The front end of the syringe is provided with a butterfly wing fixing device (34), which is provided with at least one elastic piece (35) and at least one surface protrusion (37) in the circumferential direction, the elastic piece (35) and the surface protrusion (37) a spacing member; a lower surface of each of the elastic pieces (35) is provided with a hook member (38); The outer surface of the front end of the puncture needle hub (8) is provided with a first buckle groove (81), a convex portion (82) and a second buckle groove (83). The safety indwelling needle according to claim 1, wherein the cap (1) is a circular vertebral body having a small diameter at the front end and a large diameter at the rear end, and the front end of the outer surface of the cap (1) is provided with a plurality of vertical convexities. The inner surface of the rear end of the cap (1) is sequentially provided with a plurality of beads. The safety indwelling needle according to claim 1, wherein the holding member (2) is provided with a butterfly-shaped holding body (21) and a holding protrusion (22), and the butterfly-shaped holding body (21) The clamping protrusions (22) are integrally formed. The safety indwelling needle according to claim 1, wherein the syringe (3) is a cylinder having a small diameter at the front end and a large diameter at the rear end; the front end of the syringe is recessed inwardly with the center of the cylinder A hole having a diameter larger than a diameter of the soft needle. The safety indwelling needle according to claim 1, wherein the butterfly wing fixing device (34) is provided with a plurality of curved hooks, and one end of the mounting joint (34) is integrally formed with the syringe (3), The arcuate hook at the other end of the mounting joint (34) snaps into the boss of the circular hole of the clamping projection (22). The safety indwelling needle according to claim 1, characterized in that the rear end of the syringe (3) is provided with a stopper (36). A safety indwelling needle according to claim 1, characterized in that the length of the puncture needle (7) is greater than the length of the soft needle (5). A safety indwelling needle according to claim 1, characterized in that the length of the syringe (3) is greater than the length of the puncture needle (7). The method for using a safety indwelling needle according to any one of claims 1 to 8, characterized in that after the cap (1), the puncture needle (7) and the soft needle (3) are opened into the portion to be treated, the sleeve is pulled through. The seat (11) slides the sleeve body (10), the puncture needle (7) and the puncture needle hub (8) outward away from the syringe (3), and the puncture needle (7) gradually leaves the soft needle (5) and enters. After the inner cavity of the syringe (3), and the soft needle (5) is left in the position to be treated, the needle holder (8) is gradually moved backward, and the hook member (38) under the barrel spring (35) is caught in the first buckle groove. (81) The inner body and the rear end of the barrel are also buckled into the second buckle groove (83) of the puncture needle holder, so that the puncture is under the blocking action of the first convex portion (82) of the puncture needle seat. The needle (7) is locked in the syringe (3).