Venous indwelling needle

Abstract

The utility model discloses a venous indwelling needle, and belongs to the technical field of medical instruments. The venous indwelling needle comprises a venous indwelling needle body with a three-way pipe and further comprises a water injection pipe installed on a three-way pipe body, the projection of the axis of the water injection pipe and the projection of the axis of the three-way pipe body on the same plane have at least one intersection point, and the length of the water injection pipe is larger than or equal to the length of the three-way pipe body. A water outlet hole is formed in the water injection pipe; according to the venous indwelling needle, the water injection pipe is installed on the venous indwelling needle body, a certain amount of normal saline can be injected into the water injection pipe through an injector when the needle is pulled up, the normal saline flows around through the water outlet holes, the space between the pasting film and the skin can be filled with liquid, the pasting film is rapidly separated from the skin, and therefore the pain of a patient is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a venous indwelling needle. Background Art

[0002] Intravenous indwelling needle is a puncture technique widely used in clinical work. The use of intravenous indwelling needle can reduce the pain and psychological pressure caused by repeated punctures, and can effectively protect the veins at the puncture site. It has been widely used, especially for children and elderly patients. Intravenous indwelling needles have a long retention time, are not easy to fall out of the blood vessels, and can ensure the rapid patency of the venous channel. It can effectively reduce the braking of the punctured limbs of patients, help rescue critically ill patients, improve the level and quality of nursing work, and reduce the workload of nursing.

[0003] After searching the patent with Chinese patent application number: 201621042312.X, a venous indwelling needle is disclosed, which includes a connecting sleeve, a catheter, an elastic element, and a needle assembly. The needle assembly includes a needle and a needle seat. One end of the needle is fixed on the needle seat, and the other end passes through the connecting sleeve and extends into the elastic element. The elastic element is connected to the connecting sleeve, and the catheter is covered with the connecting sleeve. The catheter of the venous indwelling needle is equipped with an elastic element inside, which effectively prevents the bending of the catheter and the breakage of the catheter caused by the needle tip puncturing the inner wall of the catheter in violation of regulations, and avoids the threat of catheter blockage, infusion leakage, and broken catheter retention in the blood vessel to the patient's life safety. The above patent has the following shortcomings in actual use: when removing the indwelling needle and tearing off the film, there are some special groups of people, such as infants, edema patients, patients with skin diseases and patients with thick body hair, etc. The film sticks to the patient's skin, which will increase the patient's pain during the tearing process. If there is liquid leakage and swelling at the injection site, it is more difficult to tear off the film, and it may even cause avulsion injuries, affecting the user experience. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that when removing the needle, the patient's pain will increase during the process of tearing off the film, and proposes a venous indwelling needle.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A venous indwelling needle comprises a venous indwelling needle body with a tee tube, and also comprises: a water injection pipe installed on the tee tube body, wherein the projection of the axis of the water injection pipe and the axis of the tee tube body on the same plane has at least one intersection, and the length of the water injection pipe is greater than or equal to the length of the tee tube body; and a water outlet hole is opened on the water injection pipe.

[0007] In order to reduce the gap between the film and the skin, preferably, the axis of the water injection pipe, the axis of the tee pipe body and the axis of the tee pipe side pipe are in the same plane.

[0008] Furthermore, the cross-sectional shape of the water injection pipe is circular or polygonal.

[0009] In order to prevent the pollution source from entering the film-sticking area through the water injection pipe, a water injection port is further provided at one end of the water injection pipe, and the other end of the water injection pipe is a closed structure. The other end of the water injection pipe does not exceed the junction of the three-way pipe body and the side pipe, and a sealing gasket is fixedly connected to the water injection port.

[0010] In order to supply water to the water outlet separately, preferably, a distribution block is slidably connected in the water injection pipe, a cavity is opened in the distribution block, a water inlet is opened on the cavity, a sealing gasket is fixedly connected in the water inlet, a through hole connected to the cavity is opened on the side wall of the distribution block, the through hole cooperates with the water outlet, and a spring for driving the distribution block to reset is arranged in the water injection pipe.

[0011] Preferably, a thin wire is fixedly connected in the water outlet hole, and the thin wire extends into the water injection pipe and is fixedly connected with a water absorption block.

[0012] Compared with the prior art, the utility model provides a venous indwelling needle having the following

[0013] Beneficial effects:

[0014] 1. The intravenous indwelling needle is provided with a water injection tube on the intravenous indwelling needle body. When the needle is removed, a certain amount of physiological saline can be injected into the water injection tube by a syringe. The saline flows around through the water outlet hole, and then gently massages the area between the film and the skin to fill with liquid, accelerate the film to separate from the skin, and thus relieve the patient's pain.

[0015] 2. The intravenous indwelling needle can increase the water pressure by supplying water to the water outlet separately, so that the spraying range is wider and farther, which helps to increase the speed of tearing off the film.

[0016] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model installs a water injection tube on the intravenous indwelling needle body. When the needle is removed, a certain amount of physiological saline can be injected into the water injection tube by using a syringe. The saline flows around through the water outlet, which can fill the space between the film and the skin with liquid, accelerate the film to be separated from the skin, and thus reduce the patient's pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a venous indwelling needle proposed by the utility model Figure 1 ;

[0018] Figure 2 A venous indwelling needle proposed by the utility model Figure 1 A magnified view of part A;

[0019] Figure 3 This is a structural schematic diagram of a venous indwelling needle distribution block proposed by the utility model;

[0020] Figure 4 A schematic diagram of the structure of a venous indwelling needle proposed by the utility model Figure 2 ;

[0021] Figure 5 A venous indwelling needle proposed by the utility model Figure 4 Enlarged view of part B.

[0022] In the figure: 1. intravenous indwelling needle body; 101. three-way pipe; 2. water injection pipe; 201. water outlet hole; 202. water injection port; 3. distribution block; 301. cavity; 302. through hole; 303. water inlet; 304. spring; 4. thin wire; 401. water absorption block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] Embodiment 1:

[0026] Reference Figure 1-Figure 3, an intravenous indwelling needle comprises an intravenous indwelling needle body 1 with a three-way tube 101, and an injection tube 2 installed on the three-way tube 101 body. The three-way tube 101 comprises a pipeline body, a side tube connected to an extension tube, and an injection needle tube. The cross-sectional shape of the injection tube 2 is circular or polygonal. The circle has fewer edges and corners, which can avoid piercing the skin or film. When it is multi-deformed, there are more gaps between the injection tube 2 and the skin, which is conducive to the flow of liquid. The injection tube 2 can be integrally formed with the three-way tube 101, and both are transparent, which is convenient for observation and manufacturing, saving separate production time. It can also be detachably connected to the three-way tube 101 by a buckle. The appropriate injection tube 2 can be selected according to the patient's condition. For example, when an adult has less body hair, no symptoms such as skin allergies, and does not cause edema, the injection tube 2 can be removed from the three-way tube 101. To avoid waste of resources and improve the use effect, the projections of the axis of the water injection pipe 2 and the axis of the main body of the three-way pipe 101 on the same plane have at least one intersection. Here, the axis of the water injection pipe 2 is parallel to the axis of the main body of the three-way pipe 101 or tilted at a certain angle. When parallel, the projections on the same plane coincide. There are countless intersections, which can increase the connection strength of the water injection pipe 2. Having an intersection includes spatial tilt of the axis and plane tilt. When the axis of the water injection pipe 2 is tilted at a certain angle relative to the axis of the three-way pipe 101, the wetting surface of the liquid can be expanded. Here, we choose a parallel setting. The length of the water injection pipe 2 is greater than or equal to the length of the main body of the three-way pipe 101, which is convenient for use; a water outlet hole 201 is opened on the water injection pipe 2, and a plurality of water outlet holes 201 are arranged, which helps to diffuse the liquid to the surroundings and accelerate the film to detach from the skin, thereby alleviating the patient's pain.

[0027] During use, by installing the water injection tube 2 on the intravenous indwelling needle body 1, when removing the needle, a certain amount of physiological saline can be injected into the water injection tube 2 through the needle tube. The saline flows around through the water outlet 201, and with the assistance of gentle massage, the space between the film and the skin can be filled with liquid, which accelerates the film to detach from the skin, thereby alleviating the patient's pain.

[0028] Reference Figure 1 The axis of the water injection pipe 2, the axis of the main body of the three-way pipe 101 and the axis of the side pipe of the three-way pipe 101 are all in the same plane, which is convenient for fixing it on the skin, reducing the gap between the film and the skin, and improving the film fixing and protection effect.

[0029] Reference Figure 1-Figure 2A water injection port 202 is provided at one end of the water injection pipe 2. When in use, the water injection port 202 is located on the outside of the film, which is convenient for injecting water into the film and the skin through the water injection port 202. A sealing gasket is fixedly connected to the water injection port 202. The sealing gasket is made of heparin cap material or equivalent material. The needle can puncture multiple times. When the needle is pulled out, the needle hole can be automatically sealed to reduce the entry of air or gaseous pollutants in the air into the water injection pipe 2, thereby improving the use effect. The other end of the water injection pipe 2 is a closed structure, and the other end of the water injection pipe 2 does not exceed the junction of the three-way pipe 101 body and the side pipe, which can avoid obstruction to the needle puncture and affect the use of medical staff. It can also avoid the tail touching the wound during water injection, thereby increasing the pain of the patient.

[0030] Reference Figure 1-Figure 3 A distribution block 3 is slidably connected in the water injection pipe 2, a cavity 301 is provided in the distribution block 3, a water inlet 303 is provided on the cavity 301, a sealing gasket is fixedly connected in the water inlet 303, and the sealing gasket is also made of heparin cap material or equivalent material, a through hole 302 connected to the cavity 301 is provided on the side wall of the distribution block 3, the through hole 302 is matched with the water outlet 201, and the through holes 302 are evenly arranged on the outer wall of the distribution block 3, which can ensure that when water is injected, the liquid can flow from the through hole 302 into the corresponding water outlet 201, and a spring 304 for driving the distribution block 3 to reset is provided in the water injection pipe 2. When in use, the syringe needle is The sealing pad is inserted into the water injection port 202, and the water outlet end of the needle is in the cavity 301. Then a small amount of liquid is injected into the cavity 301. At this time, the liquid passes through the through hole 302 and enters the water outlet hole 201 at the uppermost end, close to the water injection port 202, and then flows out from the water outlet hole 201 to fill the space between the tear film and the skin. After water flows out of the water outlet hole 201 at the uppermost end, the distribution block 3 is pushed step by step into the water injection tube 2 by pushing the tube body of the syringe, so that the water outlet holes 201 discharge water from top to bottom in sequence, and water is supplied to the water outlet holes 201 separately, which can increase the water pressure and make the spray range wider and farther, which helps to increase the speed of tearing off the film.

[0031] Embodiment 2:

[0032] Reference Figure 4-Figure 5, which is basically the same as the first embodiment. Here, we refine the water injection pipe 2 and specifically design it as follows: a thin wire 4 is fixedly connected in the water outlet 201, and the thin wire 4 extends into the water injection pipe 2 and is fixedly connected with a water absorbing block 401. When in use, after the needle is inserted, when the three-way pipe 101 and the wound are covered with a transparent film, the thin wire 4 is first spread to both sides of the three-way pipe 101 so that it is attached to the skin, and then the film is fixed. At this time, the thin wire 4 is between the skin and the film. When the needle is removed, a certain amount of water is injected into the water injection pipe 2, and the thin wire 4 can absorb water from the water injection pipe 2 through the water absorbing block 401, and the film can be moistened from all around the thin wire 4, and then the film is gently massaged to disperse the water flow. At this time, the film can be lifted from the skin. By setting the thin wire 4, the flow of liquid can be accelerated, and the liquid can be quickly diffused, which helps to accelerate the separation of the film from the skin, thereby alleviating the patient's pain.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A venous indwelling needle, comprising a venous indwelling needle body (1) with a three-way tube (101), characterized in that: Also includes: A water injection pipe (2) installed on the main body of the tee pipe (101), The projections of the axis of the water injection pipe (2) and the axis of the main body of the tee pipe (101) on the same plane have at least one intersection, and the length of the water injection pipe (2) is greater than or equal to the length of the main body of the tee pipe (101); The water injection pipe (2) is provided with a water outlet hole (201).

2. A venous indwelling needle according to claim 1, characterized in that: The axis of the water injection pipe (2), the axis of the main body of the tee pipe (101) and the axis of the side pipe of the tee pipe (101) are all in the same plane.

3. A venous indwelling needle according to claim 2, characterized in that: The cross-sectional shape of the water injection pipe (2) is circular or polygonal.

4. A venous indwelling needle according to claim 3, characterized in that: A water injection port (202) is provided at one end of the water injection pipe (2), and the other end of the water injection pipe (2) is a closed structure. The other end of the water injection pipe (2) does not exceed the junction of the main body of the three-way pipe (101) and the side pipe. A sealing gasket is fixedly connected inside the water injection port (202).

5. A venous indwelling needle according to claim 4, characterized in that: A distribution block (3) is slidably connected inside the water injection pipe (2), a cavity (301) is provided inside the distribution block (3), a water inlet (303) is provided on the cavity (301), a sealing gasket is fixedly connected inside the water inlet (303), a through hole (302) connected to the cavity (301) is provided on the side wall of the distribution block (3), the through hole (302) cooperates with the water outlet (201), and a spring (304) for driving the distribution block (3) to return to its original position is provided inside the water injection pipe (2).

6. A venous indwelling needle according to claim 4, characterized in that: A thin wire (4) is fixedly connected inside the water outlet hole (201), and the thin wire (4) extends into the water injection pipe (2) and is fixedly connected to a water absorption block (401).

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