CN215608322U - Prevent closed vein of jam and keep somewhere needle - Google Patents

Abstract

The utility model discloses a closed venous indwelling needle capable of preventing blockage, and belongs to the technical field of venous indwelling needles. Comprises an indwelling catheter, an indwelling needle seat, an extension catheter, a Y-shaped positive pressure joint, a puncture needle, an isolating plug and a single-hand clamp; the upper end face of the isolation plug and the lower end face of the infusion bypass are on the same plane, the isolation plug is provided with limiting grooves, and the isolation plug below the limiting grooves is provided with guide grooves with the number corresponding to that of the guide convex edges; the indwelling catheter is characterized in that a main hole is formed in the front end of the main body of the indwelling catheter, and a side hole is formed in the side face of the indwelling catheter body below the main hole. According to the utility model, the upper end face of the isolation plug and the lower end face of the infusion bypass are in the same plane, and the isolation plug with the inclined upper end face can ensure that blood returning cannot block a groove formed between the isolation plug and the infusion bypass to form thrombus during infusion, so that smooth infusion is ensured. The infusion is carried out through the side hole, so that the smoothness of the infusion is effectively guaranteed, the local resistance of a liquid outflow passage is reduced, and the infusion speed is improved.

Description

Prevent closed vein of jam and keep somewhere needle

Technical Field

The utility model relates to a closed venous indwelling needle capable of preventing blockage, and belongs to the technical field of venous indwelling needles.

Background

A venous indwelling Needle (Needle) is composed of a stainless steel core, a soft outer sleeve and a plastic Needle seat. An infusion tool for puncturing a blood vessel with an outer cannula and a stylet during puncture, withdrawing the stylet after the cannula is fed into the blood vessel, and only leaving the soft outer cannula in the blood vessel for infusion.

The venous indwelling needle is also called as venous trocar. The core components include a flexible catheter/cannula that can be indwelling in a blood vessel, and a stainless steel puncture guiding stylet. When in use, the catheter and the needle core are punctured into a blood vessel together, after the catheter completely enters the blood vessel, the needle core is withdrawn, and only the soft catheter is left in the blood vessel so as to carry out infusion treatment.

The indwelling needle is divided into an open type and a closed type, the open type is divided into a common type and a safety type (a needle-prick prevention type), and the closed type is divided into a common type and a safety type (a needle-prick prevention type).

The existing closed venous indwelling needle has the following problems: when the puncture needle core is completely drawn out from the indwelling catheter, blood can flow back to the infusion bypass, but because a sunken groove is formed between the isolation plug and the infusion bypass, the blood can block the groove to form thrombus, so that the infusion is not smooth; (two) keep somewhere the pipe and be located puncture site inside, for example the back of the hand, on the one hand because the material relation leads to there being tiny thrombus to form, on the other hand keeps somewhere the pipe and is the hose, and the patient leads to the pipe crooked in the motion, and the pipe opening is blockked up by the vascular wall, influences the unobstructed nature of infusion, has to pull back whole stay needle, makes it unobstructed.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: provides a closed vein indwelling needle for preventing blockage, which solves the problem of the vein indwelling needle in the prior art.

The technical problem to be solved by the utility model is realized by adopting the following technical scheme:

a closed vein indwelling needle capable of preventing blockage comprises an indwelling catheter, an indwelling needle seat, an extension catheter, a Y-shaped positive pressure joint, a puncture needle, an isolating plug and a single-hand clamp; the rear end of the indwelling catheter is connected with an indwelling needle seat, the side surface of the indwelling needle seat is provided with an obliquely arranged infusion bypass, the infusion bypass is connected with the front end of the extension catheter, the rear end of the extension catheter is connected with a Y-shaped positive pressure joint, the extension catheter is provided with a single-hand clamp for controlling infusion, the rear end of the indwelling needle seat is provided with a puncture interface, an isolation plug is fixed in the rear end of the indwelling needle, and the puncture needle penetrates through the isolation plug and the indwelling catheter from the puncture interface and extends out;

a limiting convex edge is arranged in the indwelling needle seat, and a plurality of guide convex edges are arranged in the indwelling needle seat below the limiting convex edge;

the upper end face of the isolation plug is obliquely arranged, the inclination angle of the isolation plug is consistent with that of the lower end face of the infusion bypass, the isolation plug is provided with a limiting groove, the isolation plug below the limiting groove is provided with a number of guiding grooves corresponding to the number of the guiding convex edges, and the upper end face of the isolation plug and the lower end face of the infusion bypass are on the same plane while the limiting grooves are clamped with the limiting convex edges;

the Y-shaped positive pressure joint comprises an infusion end and a fluid infusion end, the infusion end is connected with a shrink film sleeve, the fluid infusion end is connected with an end cap, and a connecting band is connected between the end cap and the Y-shaped positive pressure joint;

the indwelling catheter is characterized in that a main hole is formed in the front end of the main body of the indwelling catheter, a side hole is formed in the side face of the indwelling catheter body below the main hole, and the distance between the side hole and the main hole is 3-5 mm.

As a preferred example, the limiting groove and the limiting convex edge are both annular.

As a preferred example, the guiding convex edge and the wire groove are preferably four and distributed in a cross shape.

As a preferred example, the side hole is oval or circular.

As a preferred example, the shrink film sleeve and the end cap are respectively fixed with the Y-shaped positive pressure joint in a screwing way.

As a preferred example, the extension tube is a transparent silicone hose.

The utility model has the beneficial effects that:

(1) according to the utility model, when the isolating plug is inserted from the needle threading interface of the indwelling needle base, the guide groove of the isolating plug is pushed along the guide convex edge until the limit groove is clamped with the limit convex edge, the guide groove is matched with the guide convex edge, so that the upper end surface of the isolating plug and the lower end surface of the infusion bypass can be ensured to be on the same plane, and the isolating plug with the inclined upper end surface can ensure that blood returning cannot block the groove formed between the isolating plug and the infusion bypass to form thrombus when infusion is carried out, so that the infusion is ensured to be carried out smoothly;

(2) according to the utility model, the side hole is formed on the indwelling catheter, and under the condition that the main hole is close to the vessel wall or close to the venous valve to cause the blockage of the infusion, the infusion is carried out through the side hole, so that the smoothness of the infusion is effectively ensured; on the other hand, the main hole and the side hole are used for simultaneous transfusion, so that the local resistance of a liquid outflow passage is reduced, and the transfusion speed is improved.

(3) According to the utility model, the connecting belt is connected between the end cap and the Y-shaped positive pressure joint, so that unnecessary troubles caused by the fact that the twisted end cap falls and is lost when medical workers supplement liquid can be avoided.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the structure of the present invention with parts separated;

FIG. 3 is a schematic structural view of the septum before being inserted into the indwelling needle hub of the present invention;

FIG. 4 is a schematic structural view of the septum of the present invention after being inserted into the indwelling needle holder;

FIG. 5 is a schematic view showing the structure of the distal end of an indwelling catheter without the insertion of a puncture needle;

FIG. 6 is a schematic view showing the structure of the distal end of an indwelling catheter into which a puncture needle is inserted;

FIG. 7 is a schematic front view of the isolating plug;

fig. 8 is a schematic bottom view of the isolating plug.

In the figure: 1. an indwelling catheter; 11. a main hole; 12. a side hole; 2. keeping the needle stand; 21. a bypass for infusion; 22. a puncture interface; 23. a limiting convex edge; 24. a guide flange; 3. extending the catheter; 4. a Y-shaped positive pressure joint; 41. a transfusion end; 42. a liquid supplementing end; 5. puncturing needle; 51. a steel needle; 52. a needle holding handle; 6. an isolation plug; 61. a limiting groove; 62. a guide groove; 7. clamping with a single hand; 8. a shrink film sleeve; 9. an end cap; 10. and a connecting belt.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the utility model easy to understand, the utility model is further described with reference to the specific drawings and the embodiments.

Example (b):

as shown in fig. 1-8, the utility model provides a closed type vein indwelling needle for preventing blockage, which comprises an indwelling catheter 1, an indwelling needle seat 2, an extension catheter 3, a Y-shaped positive pressure joint 4, a puncture needle 5, an isolating plug 6 and a one-hand clamp 7; the indwelling catheter 1 is made of a transparent expandable silica gel soft material, the rear end of the indwelling catheter 1 is connected with an indwelling needle seat 2, the side surface of the indwelling needle seat 2 is provided with an obliquely arranged infusion bypass 21, the infusion bypass 21 is connected with the front end of an extension catheter 3, the extension catheter 3 adopts a transparent silica gel hose, the rear end of the extension catheter 3 is connected with a Y-shaped positive pressure connector 4, a single-hand clamp 7 for controlling infusion is arranged on the extension catheter 3, the rear end of the indwelling needle seat 2 is provided with a puncture interface 22, an isolating plug 6 is fixed inside the rear end of the indwelling needle, the isolating plug 6 is made of a medical-grade rubber material, the puncture needle 5 penetrates through the isolating plug 6 and the indwelling catheter 1 by the puncture interface 22 and extends out, and the puncture needle 5 comprises a needle holding handle 52 and a steel needle 51 arranged on the needle holding handle 52.

The inside of the indwelling needle base 2 is provided with a limiting convex edge 23, and the inside of the indwelling needle base 2 below the limiting convex edge 23 is provided with a plurality of guiding convex edges 24.

The upper end face of the isolation plug 6 is obliquely arranged, the inclination angle of the isolation plug is consistent with the lower end face of the infusion bypass 21, the isolation plug 6 is provided with a limiting groove 61, the isolation plug 6 below the limiting groove 61 is provided with guide grooves 62 corresponding to the guide convex edges 24 in quantity, and when the limiting groove 61 is clamped with the limiting convex edges 23, the upper end face of the isolation plug 6 and the lower end face of the infusion bypass 21 are on the same plane.

When keeping apart 6 and inserting from the needle threading interface of keeping somewhere needle file 2, keep apart the direction recess 62 of 6 and impel along direction chimb 24, until spacing recess 61 and spacing chimb 23 joint, direction recess 62 and the cooperation of direction chimb 24, can guarantee to keep apart under 6 up end of stopper and the infusion bypass 21 terminal surface at the coplanar, when the up end can guarantee the infusion for the isolation stopper 6 on inclined plane, the blood of blood return can not block up and form the thrombus in the recess of keeping apart the formation between stopper 6 and infusion bypass 21, guarantee that the infusion is unobstructed to go on.

The limiting groove 61 and the limiting convex edge 23 are both annular, and the four guiding convex edges 24 and the wire grooves are distributed in a cross shape, as shown in fig. 7-8.

Y shape positive pressure joint 4 includes infusion end 41 and fluid infusion end 42, and infusion end 41 is connected with shrink film sleeve pipe 8, and fluid infusion end 42 is connected with end cap 9, and shrink film sleeve pipe 8, end cap 9 are connected with connecting band 10 between Y shape positive pressure joint 4 respectively with Y shape spiro union is fixed, end cap 9. Connecting band 10 is connected with between end cap 9 and Y shape malleation connects 4, can avoid medical personnel when the fluid infusion, and the end cap 9 after unscrewing drops and loses, causes unnecessary trouble.

The front end of the main body of the indwelling catheter 1 is provided with a main hole 11, the side surface of the main body of the indwelling catheter 1 below the main hole 11 is provided with a side hole 12, the side hole 12 is oval or circular, and the distance between the side hole 12 and the main hole is 113mm-5 mm. The side hole 12 is arranged on the indwelling catheter 1, and under the condition that the main hole 11 is close to the vessel wall or close to the venous valve to cause the blockage of the infusion, the infusion is carried out through the side hole 12, so that the smoothness of the infusion is effectively guaranteed; on the other hand, the main hole 11 and the side hole 12 are used for simultaneous transfusion, so that the local resistance of a liquid outflow passage is reduced, and the transfusion speed is improved.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. A closed vein indwelling needle capable of preventing blockage comprises an indwelling catheter (1), an indwelling needle seat (2), an extension catheter (3), a Y-shaped positive pressure joint (4), a puncture needle (5), an isolating plug (6), an extension hose and a one-hand clamp (7); the rear end of the indwelling catheter (1) is connected with an indwelling needle seat (2), the side surface of the indwelling needle seat (2) is provided with an obliquely arranged infusion bypass (21), the infusion bypass (21) is connected with the front end of an extension catheter (3), the rear end of the extension catheter (3) is connected with a Y-shaped positive pressure joint (4), the extension catheter (3) is provided with a single-hand clamp (7) for controlling infusion, the rear end of the indwelling needle seat (2) is provided with a puncture interface (22), an isolating plug (6) is fixed in the rear end of the indwelling needle, and the puncture needle (5) penetrates through the isolating plug (6) and the indwelling catheter (1) through the puncture interface (22) and extends out; the method is characterized in that:

a limiting convex edge (23) is arranged in the indwelling needle seat (2), and a plurality of guide convex edges (24) are arranged in the indwelling needle seat (2) below the limiting convex edge (23);

the upper end face of the isolation plug (6) is obliquely arranged, the inclination angle of the isolation plug is consistent with that of the lower end face of the infusion bypass (21), a limiting groove (61) is formed in the isolation plug (6), the number of guide grooves (62) corresponding to the number of the guide convex edges (24) is formed in the isolation plug (6) below the limiting groove (61), the limiting groove (61) is clamped with the limiting convex edge (23), and the upper end face of the isolation plug (6) and the lower end face of the infusion bypass (21) are on the same plane;

the Y-shaped positive pressure joint (4) comprises an infusion end (41) and a liquid supplementing end (42), the infusion end (41) is connected with a shrink film sleeve (8), the liquid supplementing end (42) is connected with an end cap (9), and a connecting band (10) is connected between the end cap (9) and the Y-shaped positive pressure joint (4);

a main hole (11) is formed in the front end of a main body of the indwelling catheter (1), a side hole (12) is formed in the side face of the main body of the indwelling catheter (1) below the main hole (11), and the distance between the side hole (12) and the main hole (11) is 3-5 mm.

2. The hermetic vein retention needle for preventing occlusion as claimed in claim 1, wherein said stopper groove (61) and said stopper flange (23) are both ring-shaped.

3. The hermetic vein retention needle for preventing occlusion as claimed in claim 1, wherein the guide flange (24) and the wire groove are four and cross-shaped.

4. The hermetic venous retention needle for preventing occlusion as claimed in claim 1, characterized in that the side hole (12) is oval or circular.

5. The hermetic venous indwelling needle for preventing occlusion as recited in claim 1, wherein the shrink film sleeve (8) and the end cap (9) are respectively fixed with the Y-shaped positive pressure connector (4) by screwing.

6. The hermetic venous retention needle for preventing occlusion as claimed in claim 1, wherein the extension tube (3) is a transparent silicone hose.

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