CN110787339A

CN110787339A - Prevent venous return and keep somewhere needle

Info

Publication number: CN110787339A
Application number: CN201911231574.9A
Authority: CN
Inventors: 米娜; 朱志立; 李文敬; 张丽; 张英
Original assignee: Second Affiliated Hospital Army Medical University
Current assignee: Second Affiliated Hospital Army Medical University
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-02-14

Abstract

The invention discloses a vein backflow prevention indwelling needle, and particularly relates to the field of medical instruments. According to the invention, the inner cavity of the indwelling needle is stirred by the movable part, intravenous injection is conveyed to the liquid collecting cavity through the extension pipe through the connecting seat to be collected, the entered injection can impact on the stress plate to bring a turning force to the movable part, and the moving part and the limit salient point generate rotation similar to stirring to the inner cavity of the indwelling needle, so that the inner cavity of the indwelling needle can be effectively prevented from being blocked by blood backflow or powdery medicines.

Description

Prevent venous return and keep somewhere needle

Technical Field

The invention relates to the technical field of medical instruments, in particular to a vein reflux prevention indwelling needle.

Background

The intravenous infusion is the most common nursing operation in clinical nursing work, has the advantages of rapid drug administration, quick curative effect and the like, plays an important role in treating diseases and rescuing patients, and becomes one of the most common and most direct and effective clinical treatment means. With the continuous progress of clinical care, the venous indwelling needle is more and more widely applied to clinical transfusion. The use of the vein indwelling needle can relieve the pain of the patient caused by repeated puncture; is beneficial to emergency rescue; but also reduces the times of the puncture operation of nurses and improves the working efficiency.

Adverse reactions such as puncture site infection, subcutaneous hematoma, liquid leakage, catheter blockage, phlebitis, venous thrombosis and the like often occur in the clinical application process. Especially the blockage phenomenon of the catheter can not normally use the venous indwelling needle, thereby not only increasing the pain and the economic burden of the patient, but also increasing the nursing workload. The reasons for catheter blockage are complex, and are usually related to incomplete catheter flushing after venous blood backflow of an indwelling needle and venous nutrition infusion, improper selection of the type, dosage and injection speed of a catheter-sealing liquid, abnormal coagulation mechanism of a patient and the like. Among the factors causing the blockage of the catheter, the blockage caused by the blood reflux is particularly prominent because of the improper operation of nurses during the tube sealing process and the venous pressure caused by the excessive movement of patients or the limb compression after the tube sealing process. Under physiological conditions, the hydrostatic pressures of blood, tissue fluid, plasma and tissue fluid are two mutually antagonistic pressures, which are in dynamic equilibrium. However, the physiological characteristics of the vein such as thin wall and large caliber are likely to affect the blood by the factors such as the blood gravity in the blood vessel and the tissue pressure outside the blood vessel. When the patient lies on the bed, the veins of the whole body are approximately at the same level with the heart, and the gravity has little influence on the venous return. When the body is in an upright position or is active and exerting force, blood stays in the blood vessels below the heart level under the influence of gravity. The venous indwelling needle is a tool for remaining the soft outer sleeve in the blood vessel for transfusion, and because the venous indwelling needle is communicated with the outside, when the venous pressure is increased and is higher than the pressure in the extension tube 3 due to factors such as gravity, extravascular tissue pressure and the like, blood easily flows back to the lumen of the indwelling needle, so that the tube blockage rate is increased, and the indwelling time is shortened. Therefore, the problem of catheter blockage caused by blood reflux needs to be solved.

Disclosure of Invention

In order to overcome the above defects in the prior art, an embodiment of the present invention provides an anti-venous return indwelling needle, and the technical problems to be solved by the present invention are: how to effectively solve the problem of catheter blockage caused by blood reflux of the retention needle.

In order to achieve the purpose, the invention provides the following technical scheme: an anti-venous return remaining needle comprises a remaining needle body and a connecting seat, wherein an extension tube is arranged between the connecting seat and the remaining needle body, and a liquid stopping clamp is arranged on the extension tube;

a remaining needle head is arranged inside the remaining needle body, a needle cap is arranged outside the remaining needle head, a liquid collecting cavity is arranged inside the remaining needle body, one end of the remaining needle head is connected with the liquid collecting cavity, a moving part is arranged between the inside of the liquid collecting cavity and an inner cavity of the remaining needle head, a bifurcated pipe is fixedly arranged between the outer wall of one end of the remaining needle body, away from the remaining needle head, and an extension pipe, a containing cavity is arranged inside one end of the remaining needle body, away from the remaining needle head, a through groove is arranged between the containing cavity and the liquid collecting cavity, a sealing plug is arranged inside the containing cavity, and a first sealing cap is arranged on the outer wall of one end of the;

the movable part comprises a plurality of stress plates, a main body plate is arranged at one end of each stress plate, a connecting rod is arranged at the other end of each stress plate, a plurality of limiting salient points are uniformly arranged on the outer wall of each connecting rod, and the stress plates, the main body plates, the connecting rods and the limiting salient points are integrally formed;

the sealing plug comprises a plug column, and a limit groove is formed in the middle of the top end of the plug column;

the first sealing cap comprises a first cap shell, a limiting lug is fixedly arranged in the middle of the inner wall of the first cap shell, and anti-skidding convex strips are uniformly and fixedly arranged on the outer wall of the first cap shell.

As shown in figures 1-7, intravenous injection is delivered to the liquid collecting cavity through the extension tube via the connecting seat and collected, the entering injection can impact on the stress plate to bring a steering force to the moving part, thereby driving the connecting rod to rotate angularly in the inner cavity of the indwelling needle, and generating rotation similar to stirring together with the limiting salient points to the inner cavity of the indwelling needle, and effectively avoiding blocking the inner cavity of the indwelling needle due to blood backflow or powdery medicine.

In a preferred embodiment, the connecting seat is in a shape of a "Y", one end of the connecting seat is connected to the extension tube, the two openings of the connecting seat at the end far away from the extension tube are respectively provided with a second sealing cap, and when one opening of the extension tube cannot be used, the other second sealing cap can be pulled away from the opening of the extension tube.

In a preferred embodiment, the second sealing cap comprises a second cap shell, a limiting plug is fixedly arranged in the middle of the inner wall of the second cap shell, the limiting plug is made of rubber materials, the inner diameter of the second cap shell is matched with the outer diameter of the connecting seat, the outer diameter of the limiting plug is matched with the inner diameter of the connecting seat, and the opening of the extension tube is sealed by the second sealing cap, so that the hygienic requirement when the retention needle is not used is ensured.

In a preferred embodiment, the liquid stopping clamp comprises a clamping plate, a containing hole and a placing groove are formed in the clamping plate, one end of the placing groove is connected with the containing hole, the containing hole and the placing groove both longitudinally penetrate through the clamping plate, and a plurality of limiting convex strips are uniformly arranged on the inner wall of the placing groove and used for sealing the extension pipe.

In a preferred embodiment, the inner diameter of the receiving hole is larger than the width of the placing groove, and the outer diameter of the extension pipe is matched with the receiving hole.

In a preferred embodiment, the sealing plug is made of a rubber material, and the outer diameter of the sealing plug is adapted to the receiving cavity.

In a preferred embodiment, the limiting lugs are distributed in a cross shape, and the inner wall of the first cap shell is connected with the outer wall of the top end of the indwelling needle body through threads.

In a preferred embodiment, the outer diameter of the main body plate is smaller than the inner diameter of the liquid-collecting cavity, the length of the connecting rod is smaller than the length of the indwelling needle, and the total outer diameter of the connecting rod and the limiting convex strip is smaller than the inner diameter of the indwelling needle.

The invention has the technical effects and advantages that:

1. the invention stirs the inner cavity of the remaining needle through the moving part, carries out intravenous infusion by adopting the positive pressure joint, the intravenous injection is conveyed to the inner part of the liquid-gathering cavity through the connecting seat by the extension tube to gather, the entered injection can impact on the stress plate, and generates vortex along with the design of the positive pressure bifurcated tube and the liquid-gathering cavity to bring a steering force to the moving part, the generated positive pressure liquid drives the connecting rod to rotate angularly in the inner cavity of the remaining needle and generate rotation similar to stirring together with the limit salient point to the inner cavity of the remaining needle, thereby effectively avoiding the blocking of the inner cavity of the remaining needle by blood backflow or powdery medicine, preventing the blood from flowing back into the remaining needle, avoiding the formation of blood coagulation and thrombus, reducing the trouble of tube sealing, the complication of heparin tube sealing liquid, the complication caused by repeatedly puncturing the heparin cap, reducing the blockage, prolonging the remaining time, and avoiding the infusion particle generated by repeatedly puncturing the heparin cap by the needle in the traditional tube sealing process, Pollution and the like;

2. according to the invention, the liquid stopping clamp is arranged, after single intravenous injection is completed, medical personnel can pull the clamping plate, the position of the extension tube is stored to the position of the placing groove from the storage hole, the position of the extension tube stored to the placing groove is limited through the limiting convex strip, the soft extension tube is limited by the width of the placing groove, the contact position of the extension tube and the liquid stopping clamp can be clamped, the pressure intensity of the liquid collecting cavity is equal to the pressure intensity in the vein, blood backflow caused by pressure intensity difference is avoided, when the indwelling needle body needs to be subjected to intravenous injection again, the extension tube only needs to be pushed back to the storage hole again, the shape of the extension tube is recovered, and the intravenous injection is conveyed again, so that the medical personnel can use the intravenous injection once more conveniently.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is an enlarged view of portion A of FIG. 1 according to the present invention.

Fig. 3 is a schematic view of the structure of the movable member of the present invention.

FIG. 4 is a plan view of the indwelling needle body according to the present invention.

Fig. 5 is a schematic view of the sealing plug of the present invention.

Fig. 6 is a schematic structural view of a first sealing cap according to the present invention.

Fig. 7 is a structural diagram of a second sealing cap according to the present invention.

FIG. 8 is a schematic view of a liquid stopping clip according to the present invention.

The reference signs are: 1 indwelling needle body, 11 indwelling needle head, 12 needle cap, 13 liquid collecting cavity, 14 movable piece, 141 stress plate, 142 main body plate, 143 connecting rod, 144 limit salient point, 15 bifurcated pipe, 16 containing cavity, 17 through groove, 18 sealing plug, 181 plug column, 182 limit groove, 19 first sealing cap, 191 first cap shell, 192 limit lug, 193 antiskid convex strip, 2 connecting seat, 21 second sealing cap, 211 second cap shell, 212 limit plug, 3 extension pipe, 4 liquid stopping clip, 41 clamping plate, 42 containing hole, 43 placing groove and 44 limit convex strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a vein backflow prevention indwelling needle which comprises an indwelling needle body 1 and a connecting seat 2, wherein an extension pipe 3 is arranged between the connecting seat 2 and the indwelling needle body 1, and a liquid stopping clamp 4 is arranged on the extension pipe 3;

an indwelling needle head 11 is arranged inside the indwelling needle body 1, a needle cap 12 is arranged outside the indwelling needle head 11, a liquid collecting cavity 13 is arranged inside the indwelling needle body 1, one end of the indwelling needle head 11 is connected with the liquid collecting cavity 13, a moving part 14 is arranged between the inside of the liquid collecting cavity 13 and the inner cavity of the indwelling needle head 11, a bifurcated pipe 15 is fixedly arranged between the outer wall of one end of the indwelling needle body 1, away from the indwelling needle head 11, and an extension pipe 3, a containing cavity 16 is arranged inside one end of the indwelling needle body 1, away from the indwelling needle head 11, a through groove 17 is arranged between the containing cavity 16 and the liquid collecting cavity 13, a through groove 18 is arranged inside the containing cavity 16, and a first sealing cap 19 is arranged on the outer wall of one end of the indwelling;

the movable member 14 includes a plurality of stress plates 141, one end of each stress plate 141 is provided with a main body plate 142, the other end of each stress plate 141 is provided with a connecting rod 143, the outer wall of each connecting rod 143 is uniformly provided with a plurality of limit protrusions 144, and the stress plates 141, the main body plates 142, the connecting rods 143 and the limit protrusions 144 are integrally formed;

the sealing plug 18 comprises a plug column 181, and a limit groove 182 is arranged in the middle of the top end of the plug column 181;

the first sealing cap 19 comprises a first cap shell 191, a limiting lug 192 is fixedly arranged in the middle of the inner wall of the first cap shell 191, and anti-skid convex strips 193 are uniformly and fixedly arranged on the outer wall of the first cap shell 191.

The connecting seat 2 is in a Y shape, one end of the connecting seat 2 is connected with the extension pipe 3, two openings of one end, far away from the extension pipe 3, of the connecting seat 2 are respectively provided with a second sealing cap 21, when the opening of one extension pipe 3 cannot be used, the other second sealing cap 21 can be pulled out from the opening of the extension pipe 3, the second sealing cap 21 comprises a second cap shell 211, the middle part of the inner wall of the second cap shell 211 is fixedly provided with a limiting plug 212, the limiting plug 212 is made of rubber materials, the inner diameter of the second cap shell 211 is matched with the outer diameter of the connecting seat 2, the outer diameter of the limiting plug 212 is matched with the inner diameter of the connecting seat 2, the opening of the extension pipe 3 is sealed through the second sealing cap 21, the sanitary requirement when the detention needle is not used is ensured, the sealing plug 18 is made of rubber materials, the outer diameter of the sealing plug 18 is matched with the containing cavity 16, and the limiting lugs 192, the inner wall of the first cap shell 191 is connected with the outer wall of the top end of the indwelling needle body 1 through threads, the outer diameter of the main body plate 142 is smaller than the inner diameter of the liquid collecting cavity 13, the length of the connecting rod 143 is smaller than the length of the indwelling needle head 11, and the total outer diameter of the connecting rod 143 and the limiting convex strip 44 is smaller than the inner diameter of the indwelling needle head 11.

As shown in fig. 1 to 7, the embodiment specifically is as follows: when the retention needle is used, only one second sealing cap 21 at one end of the connecting seat 2 needs to be pulled out to be inserted with an intravenous injection tube, then the needle cap 12 is separated from the retention needle 11, the tip of the retention needle 11 is pricked into the vein of a patient, the intravenous injection is conveyed to the liquid collecting cavity 13 through the extension tube 3 by the connecting seat 2 to be collected, the collected injection amount is increased to drive the main body plate 142 to generate suspension, the intravenous injection enters the vein of the patient through the gap between the retention needle 11 and the connecting rod 143, then the intravenous injection enters the liquid collecting cavity 13, the obliquely entering injection can impact on the stress plate 141 to bring a turning force to the movable part 14, so that the connecting rod 143 is driven to generate angular rotation in the inner cavity of the retention needle 11, and the limiting salient points 144 together generate rotation similar to stirring in the inner cavity of the retention needle 11, and the blockage of the inner cavity of the retention needle 11 due to blood backflow or powdery medicines can be effectively, before the indwelling needle body 1 is used, medical personnel can separate the first sealing cap 19 from the indwelling needle body 1 through threads, then take out the sealing plug 18 from the storage cavity 16, the used 0.9% sodium chloride solution washes the indwelling needle head 11 and the liquid collecting cavity 13 through the through groove 17, the infection probability caused by pollution during the storage period of the indwelling needle body 1 is reduced, then the plug column 181 is played back into the storage cavity 16, the limiting lug 192 is rotated after being correspondingly placed with the limiting groove 182, the plug column 181 is extruded and deformed, the through groove 17 is sealed, and the leakage of intravenous injection liquid when the indwelling needle body 1 is used is avoided.

The liquid stopping clamp 4 comprises a clamping plate 41, a containing hole 42 and a placing groove 43 are formed in the clamping plate 41, one end of the placing groove 43 is connected with the containing hole 42, the containing hole 42 and the placing groove 43 both longitudinally penetrate through the clamping plate 41, a plurality of limiting convex strips 44 are uniformly arranged on the inner wall of the placing groove 43 and used for sealing the position of the extension pipe 3, the inner diameter of the containing hole 42 is larger than the width of the placing groove 43, and the outer diameter of the extension pipe 3 is matched with the containing hole 42;

as shown in fig. 1 and 8, the embodiment specifically is as follows: after single intravenous injection is completed, medical personnel can pull splint 41, accomodate extension pipe 3 position to standing groove 43 position from accomodating hole 42, inject the extension pipe 3 position of accomodating standing groove 43 via spacing sand grip 44, soft extension pipe 3 receives the injecing of standing groove 43 width, can press from both sides the closure to extension pipe 3 and the position of stopping the contact of liquid clamp 4, make and gather liquid cavity 13 and the equal with the pressure of intravenous, avoid forming the pressure difference and cause the blood backward flow, when should keep somewhere needle body 1 once more and carry out intravenous injection, only need push back extension pipe 3 to accomodating hole 42 position once more, extension pipe 3 resumes the shape and carries out intravenous injection's transport once more.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a needle is kept somewhere in venous return prevention, is including keeping somewhere needle body (1) and connecting seat (2), its characterized in that: an extension tube (3) is arranged between the connecting seat (2) and the indwelling needle body (1), and a liquid stopping clamp (4) is arranged on the extension tube (3);

a remaining needle head (11) is arranged in the remaining needle body (1), a needle cap (12) is arranged outside the remaining needle head (11), a liquid-gathering cavity (13) is arranged in the indwelling needle body (1), one end of the indwelling needle head (11) is connected with the liquid-gathering cavity (13), a movable part (14) is arranged between the inner part of the liquid-gathering cavity (13) and the inner cavity of the indwelling needle head (11), a bifurcated pipe (15) is fixedly arranged between the outer wall of one end of the indwelling needle body (1) far away from the indwelling needle head (11) and the extension pipe (3), a containing cavity (16) is arranged in one end of the indwelling needle body (1) far away from the indwelling needle head (11), a through groove (17) is arranged between the containing cavity (16) and the liquid gathering cavity (13), a sealing plug (18) is arranged in the containing cavity (16), and a first sealing cap (19) is arranged on the outer wall of one end, away from the indwelling needle head (11), of the indwelling needle body (1);

the movable piece (14) comprises a plurality of stress plates (141), a main body plate (142) is arranged at one end of each stress plate (141), a connecting rod (143) is arranged at the other end of each stress plate (141), a plurality of limiting convex points (144) are uniformly arranged on the outer wall of each connecting rod (143), and the stress plates (141), the main body plates (142), the connecting rods (143) and the limiting convex points (144) are uniformly molded in a whole body;

the sealing plug (18) comprises a plug column (181), and the middle of the top end of the plug column (181) is provided with a limit groove (182);

the first sealing cap (19) comprises a first cap shell (191), a limiting lug (192) is fixedly arranged in the middle of the inner wall of the first cap shell (191), and anti-skid convex strips (193) are uniformly and fixedly arranged on the outer wall of the first cap shell (191).

2. The anti-venous return indwelling needle of claim 1, wherein: the connecting seat (2) is Y-shaped, one end of the connecting seat (2) is connected with the extension pipe (3), and two openings at one end of the connecting seat (2) far away from the extension pipe (3) are respectively provided with a second sealing cap (21).

3. The anti-venous return indwelling needle of claim 2, wherein: the second sealing cap (21) comprises a second cap shell (211), a limiting plug (212) is fixedly arranged in the middle of the inner wall of the second cap shell (211), the limiting plug (212) is made of a rubber material, the inner diameter of the second cap shell (211) is matched with the outer diameter of the connecting seat (2), and the outer diameter of the limiting plug (212) is matched with the inner diameter of the connecting seat (2).

4. The anti-venous return indwelling needle of claim 1, wherein: end liquid clamp (4) and include splint (41), be equipped with on splint (41) and accomodate hole (42) and standing groove (43), standing groove (43) one end links to each other with accomodating hole (42), accomodate hole (42) and standing groove (43) and all vertically run through splint (41), standing groove (43) inner wall evenly is equipped with a plurality of spacing sand grips (44).

5. The anti-venous return indwelling needle of claim 4, wherein: the inner diameter of the accommodating hole (42) is larger than the width of the placing groove (43), and the outer diameter of the extension pipe (3) is matched with the accommodating hole (42).

6. The anti-venous return indwelling needle of claim 1, wherein: the sealing plug (18) is made of rubber material, and the outer diameter of the sealing plug (18) is matched with the accommodating cavity (16).

7. The anti-venous return indwelling needle of claim 1, wherein: the limiting lugs (192) are distributed in a cross shape, and the inner wall of the first cap shell (191) is in threaded connection with the outer wall of the top end of the indwelling needle body (1).

8. The anti-venous return indwelling needle of claim 1, wherein: the outer diameter of the main body plate (142) is smaller than the inner diameter of the liquid collecting cavity (13), the length of the connecting rod (143) is smaller than the length of the indwelling needle (11), and the total outer diameter of the connecting rod (143) and the limiting convex strip (44) is smaller than the inner diameter of the indwelling needle (11).