CN110787339A - Prevent venous return and keep somewhere needle - Google Patents

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

An indwelling needle for preventing venous return

technical field

The present invention relates to the technical field of medical devices, and more particularly, to an indwelling needle for preventing venous return.

Background technique

Intravenous infusion is the most common nursing operation in clinical nursing work. It plays an important role in treating diseases and rescuing patients due to its advantages of rapid drug delivery and quick curative effect, and has become one of the most commonly used and most direct and effective clinical treatments. one. With the continuous progress of clinical care, intravenous indwelling needles are more and more widely used in clinical infusion. The use of venous indwelling needle not only relieves the pain of patients caused by repeated puncture, facilitates emergency rescue, but also reduces the number of puncture operations by nurses and improves work efficiency.

In the course of clinical application, adverse reactions such as puncture site infection, subcutaneous hematoma, fluid leakage, catheter blockage, phlebitis and venous thrombosis often occur. In particular, the blockage of the catheter prevents the normal use of the venous indwelling needle, which not only increases the patient's pain and economic burden, but also increases the nursing workload. The causes of catheter blockage are complex, usually related to venous blood return from the indwelling needle, incomplete catheter flushing after intravenous nutrition infusion, improper selection of the type, dosage, and bolus rate of the sealing fluid, and abnormal coagulation mechanism of the patient. Among the many factors that cause the blockage of the catheter, the blockage of the catheter caused by the blood reflux caused by the improper operation of the nurse during the sealing of the tube, and the excessive venous pressure caused by the excessive movement of the patient or the compression of the limbs after the sealing of the tube is particularly prominent. In physiological state, the hydrostatic pressure of blood, the colloidal osmotic pressure of tissue fluid, the colloidal osmotic pressure of plasma and the hydrostatic pressure of tissue fluid are two groups of mutually antagonistic pressures, and these two pressures maintain a dynamic balance. However, due to the physiological characteristics of thin wall and large diameter, blood is easily affected by factors such as blood gravity in the blood vessel and the pressure of extravascular tissue. In the supine position, all veins in the body are roughly at the same level as the heart, and gravity has little effect on venous blood return. When the human body is in an upright position or when moving or exerting force, the blood is trapped in the blood vessels below the level of the heart due to the influence of gravity. The venous indwelling needle is a tool for leaving the soft outer cannula in the blood vessel for infusion. Because of its communication with the outside world, when the venous pressure rises and is higher than the pressure in the extension tube 3 due to factors such as gravity and extravascular tissue pressure, blood It is easy to reflux into the lumen of the indwelling needle, which increases the blocking rate and shortens the indwelling time. Therefore, the problem of catheter blockage caused by blood reflux needs to be solved urgently.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a venous backflow prevention indwelling needle. The technical problem to be solved by the present invention is: how to effectively solve the problem of catheter blockage caused by blood reflux in the indwelling needle.

In order to achieve the above purpose, the present invention provides the following technical solutions: an indwelling needle for preventing venous backflow, comprising an indwelling needle body and a connection seat, an extension tube is arranged between the connection seat and the indwelling needle body, and an extension tube is provided on the extension tube. Liquid stop clip;

The indwelling needle body is provided with an indwelling needle inside, the indwelling needle is provided with a needle cap outside, and the indwelling needle body is internally provided with a liquid-gathering cavity, and one end of the indwelling needle is connected with the liquid-gathering cavity, and the liquid-gathering cavity is A movable piece is arranged between the interior of the cavity and the inner cavity of the indwelling needle. A bifurcated tube is fixed between the outer wall of one end of the indwelling needle body far away from the indwelling needle and the extension tube, and the inner part of the indwelling needle body is disposed away from the indwelling needle. a cavity, a through groove is arranged between the storage cavity and the liquid-gathering cavity, a sealing plug is arranged inside the storage cavity, and a first sealing cap is arranged on the outer wall of one end of the indwelling needle body away from the indwelling needle head;

The movable member includes a plurality of force-bearing plates, one end of the force-bearing plate is provided with a main body plate, the other end of the force-bearing plate is provided with a connecting rod, and the outer wall of the connecting rod is evenly provided with a plurality of limit bumps, so the The force-bearing plate, the main body plate, the connecting rod and the limit bump are all integrally formed;

The sealing plug includes a plug rod, and the middle part of the top end of the plug rod is provided with a limiting groove;

The first sealing cap includes a first cap shell, the middle part of the inner wall of the first cap shell is fixedly provided with a limiting tab, and the outer wall of the first cap shell is evenly fixed with anti-skid protruding strips.

As shown in Figure 1-7, the intravenous injection is transported from the extension tube to the liquid-gathering cavity through the connecting seat for accumulation, and the injected injection can impact the force-bearing plate, bringing a steering force to the movable part, thereby driving the connecting rod The angular rotation occurs in the inner cavity of the indwelling needle, and together with the limiting convex point, the inner cavity of the indwelling needle is rotated like stirring, which can effectively avoid the clogging of the inner cavity of the indwelling needle due to blood backflow or powdered medicine.

In a preferred embodiment, the shape of the connection seat is set to a "Y" shape, one end of the connection seat is connected to the extension pipe, and the two openings of the connection seat away from the extension pipe are provided with second sealing caps, When an extension tube opening is unavailable, the other second sealing cap can be pulled away from the extension tube opening.

In a preferred embodiment, the second sealing cap includes a second cap shell, and a limit plug is fixed in the middle of the inner wall of the second cap shell, the limit plug is made of rubber material, and the second cap The inner diameter of the shell matches the outer diameter of the connecting seat, the outer diameter of the limiting plug matches the inner diameter of the connecting seat, and the opening of the extension tube is sealed by the second sealing cap to ensure the hygienic requirements of the retention needle when not in use.

In a preferred embodiment, the liquid stop clip includes a clamping plate, the clamping plate is provided with a receiving hole and a placing groove, one end of the placing groove is connected with the receiving hole, and the receiving hole and the placing groove both extend through the clamping plate longitudinally, The inner wall of the placement groove is evenly provided with a plurality of limiting protruding strips, which are used for sealing at the extension pipe.

In a preferred embodiment, the inner diameter of the receiving hole is larger than the width of the placing slot, and the outer diameter of the extension pipe is adapted to the receiving hole.

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

In a preferred embodiment, the limiting tabs are distributed in a cross shape, and the inner wall of the first cap shell and the outer wall of the top end of the indwelling needle body are connected by 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 protruding strip is smaller than the inner diameter of the indwelling needle.

Technical effects and advantages of the present invention:

1. The present invention uses a positive pressure joint to agitate the inner cavity of the indwelling needle, and uses a positive pressure joint to carry out intravenous infusion. The intravenous injection is transported to the inside of the liquid-gathering cavity by the extension tube through the connecting seat, and the injected liquid can be impacted by force. On the plate, and according to the design of the positive pressure bifurcated tube and the liquid collecting cavity, a vortex is generated, which brings a steering force to the movable part, and the generated positive pressure liquid drives the connecting rod to rotate angularly in the inner cavity of the indwelling needle, together with the limit The bumps together produce a stirring-like rotation to the inner cavity of the indwelling needle, which can effectively avoid blocking the inner cavity of the indwelling needle due to blood backflow or powdered drugs, prevent blood from flowing back into the indwelling needle, avoid the formation of coagulation and thrombus, and reduce the trouble of sealing the tube It reduces the blockage, prolongs the indwelling time, and avoids the infusion particles and pollution caused by the repeated needle puncture of the heparin cap during the traditional tube sealing process. question;

2. The present invention is provided with a liquid stop clip. After a single intravenous injection is completed, medical personnel can pull the splint to store the extension tube from the storage hole to the placement slot, and extend the storage to the placement slot through the limit protruding strip. The position of the tube is limited, and the soft extension tube is limited by the width of the placement slot, which can clamp the contact position between the extension tube and the stopper, so that the pressure in the liquid-collecting cavity and the vein is equal, avoiding the formation of pressure difference and causing blood Backflow, when the indwelling needle body needs to be used for intravenous injection again, it is only necessary to push the extension tube back to the position of the receiving hole again, and the extension tube restores its shape for intravenous injection again, which is convenient for medical personnel to use.

Description of drawings

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

FIG. 2 is an enlarged view of part A in FIG. 1 of the present invention.

FIG. 3 is a schematic diagram of the structure of the movable part of the present invention.

4 is a top view of the indwelling needle body of the present invention.

FIG. 5 is a schematic diagram of the structure of the sealing plug of the present invention.

FIG. 6 is a schematic structural diagram of the first sealing cap of the present invention.

FIG. 7 is a schematic structural diagram of the second sealing cap of the present invention.

8 is a schematic structural diagram of the liquid stop clip of the present invention.

Reference numerals are: 1 indwelling needle body, 11 indwelling needle head, 12 needle cap, 13 liquid collecting cavity, 14 movable parts, 141 force plate, 142 main body plate, 143 connecting rod, 144 limit bump, 15 bifurcation Tube, 16 Receiving Cavity, 17 Through Slot, 18 Seal Plug, 181 Plug, 182 Limit Slot, 19 First Seal Cap, 191 First Cap Shell, 192 Limit Tab, 193 Anti-Slip Rib, 2 Connecting Seat , 21 second sealing cap, 211 second cap shell, 212 limit plug, 3 extension tube, 4 liquid stop clip, 41 splint, 42 storage hole, 43 placement groove, 44 limit convex strip.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention provides an indwelling needle for preventing venous return, comprising an indwelling needle body 1 and a connection seat 2, an extension tube 3 is arranged between the connection seat 2 and the indwelling needle body 1, and a liquid stopper is arranged on the extension tube 3 clip 4;

The indwelling needle body 1 is provided with an indwelling needle 11 inside, the indwelling needle 11 is provided with a needle cap 12 outside, and the indwelling needle body 1 is provided with a liquid accumulation cavity 13 inside, and one end of the indwelling needle 11 is connected with the liquid accumulation cavity. The cavity 13 is connected, a movable member 14 is arranged between the inside of the liquid collecting cavity 13 and the inner cavity of the indwelling needle 11 , and a bifurcated tube is fixed between the outer wall of one end of the indwelling needle body 1 away from the indwelling needle 11 and the extension tube 3 15. A receiving cavity 16 is provided inside one end of the indwelling needle body 1 away from the indwelling needle 11 , a through groove 17 is arranged between the receiving cavity 16 and the liquid collecting cavity 13 , and the inside of the receiving cavity 16 is provided with a receiving cavity 16 . A sealing plug 18, the outer wall of one end of the indwelling needle body 1 away from the indwelling needle 11 is provided with a first sealing cap 19;

The movable member 14 includes a plurality of force-bearing plates 141, one end of the force-bearing plate 141 is provided with a main body plate 142, the other end of the force-bearing plate 141 is provided with a connecting rod 143, and the outer wall of the connecting rod 143 is evenly provided with a plurality of connecting rods. There are limit bumps 144, and the force receiving plate 141, the main body plate 142, the connecting rod 143 and the limit bumps 144 are all integrally formed;

The sealing plug 18 includes a plug rod 181, and a limit groove 182 is provided in the middle of the top of the plug rod 181;

The first sealing cap 19 includes a first cap shell 191 , the inner wall of the first cap shell 191 is fixedly provided with a limiting tab 192 , and the outer wall of the first cap shell 191 is uniformly fixed with anti-skid protruding strips 193 .

The shape of the connecting seat 2 is set to a "Y" shape, one end of the connecting seat 2 is connected with the extension pipe 3, and the two openings of the connecting seat 2 away from the extension pipe 3 are provided with second sealing caps 21. If the opening of the extension tube 3 cannot be used, another second sealing cap 21 can be pulled away from the opening of the extension tube 3. The second sealing cap 21 includes a second cap shell 211, and the inner wall of the second cap shell 211 is fixedly provided with a limiter in the middle The stopper 212, the stopper 212 is made of rubber material, the inner diameter of the second cap shell 211 is adapted to the outer diameter of the connection seat 2, and the outer diameter of the stopper 212 is adapted to the inner diameter of the connection seat 2 , the opening of the extension tube 3 is sealed by the second sealing cap 21 to ensure the hygienic requirements of the retention needle when it is not in use. The limiting tabs 192 are distributed in a cross shape, the inner wall of the first cap shell 191 and the outer wall of the top end of the indwelling needle body 1 are connected by threads, and 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 protruding strip 44 is smaller than the inner diameter of the indwelling needle 11 .

As shown in Figures 1-7, the specific embodiment is as follows: when using the retention needle, only one second sealing cap 21 at one end of the connection seat 2 needs to be pulled out, inserted into the intravenous injection tube, and then the needle cap 12 is connected to the intravenous injection tube. The indwelling needle 11 is separated, the tip of the indwelling needle 11 is inserted into the patient's vein, and the intravenous fluid is transported from the extension tube 3 to the liquid-gathering cavity 13 through the connecting seat 2 for accumulation, and the increase of the accumulated injection volume drives the main body plate 142 to suspend. The intravenous fluid enters the patient's vein through the gap between the indwelling needle 11 and the connecting rod 143, and then the intravenous fluid enters the liquid-gathering cavity 13. A turning force of the movable member 14 drives the connecting rod 143 to rotate angularly in the inner cavity of the indwelling needle 11, and together with the limiting protrusions 144, it produces a stirring-like rotation to the inner cavity of the indwelling needle 11, which can effectively avoid blood flow or powdery The drug blocks the inner cavity of the indwelling needle 11. Before the indwelling needle body 1 is used, the medical personnel can separate the first sealing cap 19 from the indwelling needle body 1 through threads, and then take out the sealing plug 18 from the receiving cavity 16. The used 0.9 The % sodium chloride solution washes the indwelling needle 11 and the liquid collecting cavity 13 through the through groove 17 to reduce the probability of infection caused by pollution during the storage of the indwelling needle body 1, and then the plug 181 is replayed into the storage cavity 16. , after placing the limit tab 192 corresponding to the limit groove 182 and then swiveling, the plug 181 is squeezed and deformed to seal the through groove 17 to avoid the leakage of the intravenous injection when the indwelling needle body 1 is in use.

The liquid stop clip 4 includes a splint 41, the splint 41 is provided with a receiving hole 42 and a placing groove 43, one end of the placing groove 43 is connected with the receiving hole 42, and both the receiving hole 42 and the placing groove 43 penetrate the splint longitudinally. 41. A plurality of limit protruding strips 44 are evenly arranged on the inner wall of the placing groove 43 for sealing at the extension pipe 3. The inner diameter of the receiving hole 42 is larger than the width of the placing groove 43, and the outer diameter of the extending pipe 3 and the receiving hole are 42 is suitable;

As shown in FIGS. 1 and 8 , the embodiment is as follows: after the single intravenous injection is completed, the medical personnel can pull the splint 41 to accommodate the position of the extension tube 3 from the receiving hole 42 to the position of the placing groove 43 , through the limiting protruding strip. 44 defines the position of the extension tube 3 stored in the placement groove 43. The soft extension tube 3 is limited by the width of the placement groove 43, and the contact position of the extension tube 3 and the liquid stop clip 4 can be clamped, so that the liquid accumulation cavity can be closed. 13 is equal to the pressure in the vein to avoid the formation of pressure difference and cause blood backflow. When the indwelling needle body 1 needs to be injected intravenously again, it is only necessary to push the extension tube 3 back to the position of the receiving hole 42 again, and the extension tube 3 restores its shape Re-delivery of intravenous fluids is performed.

The last points to be noted are: First of all, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, and may be mechanical connection. or electrical connection, or internal communication between two components, or direct connection, "up", "down", "left", "right", etc. are only used to indicate relative positional relationship, when the absolute position of the object being described changes, the relative positional relationship may change;

Secondly: in the drawings of the disclosed embodiments of the present invention, only the structures involved in the embodiments of the present disclosure are involved, other structures may refer to the general design, and the same embodiment and different embodiments of the present invention can be combined with each other under the condition of no conflict;

Finally: the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the present invention. within the scope of protection.

Claims (8)

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).

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