CN219398464U - Anti-backflow intravenous infusion set - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, in particular to a backflow-preventing intravenous infusion apparatus, which comprises an infusion tube, wherein an injection needle is arranged at the lower end of the infusion tube, a backflow-preventing tube is arranged at the position, adjacent to the injection needle, of the infusion tube, a limit tube is arranged on the inner side wall of the backflow-preventing tube, a gravity ball and a buoyancy ball for sealing the backflow-preventing tube at the limit tube are arranged in the backflow-preventing tube, the gravity ball is positioned between the buoyancy ball and the injection needle, the gravity of the gravity ball is larger than the sum of the buoyancy of the gravity ball and the buoyancy ball in infusion liquid, and the buoyancy ball is in contact fit with the surface, close to the injection needle, of the end surface of the limit tube.

Description

Anti-backflow intravenous infusion set

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an anti-backflow intravenous infusion set.

Background

Intravenous infusion sets utilize the principles of atmospheric pressure and hydrostatic pressure to deliver large volumes of sterile fluids, electrolytes, and medications into the body through the vein. In the infusion process, the infusion apparatus firstly treats that the liquid level of the liquid medicine in the dropping funnel is stable, and then infuses, at the moment, the difference value between the liquid column pressure and the blood pressure in the vein is certain (the atmospheric pressure is balanced with each other, the liquid column pressure is larger than the blood pressure of the vein), so that the liquid medicine is uniformly input into the blood vessel, but when the patient is in disorder or accidental collision, the height difference between the medicine bottle or the medicine bag containing the liquid medicine and the infusion position of the human body is easily changed, the liquid column pressure is lower than the blood pressure of the vein, blood reflux is caused, and the infusion effect is affected.

Disclosure of Invention

In view of the above, the present utility model provides an anti-reflux intravenous infusion set to solve the problems in the prior art.

The technical scheme is that the anti-reflux intravenous infusion apparatus comprises an infusion tube, an injection needle is arranged at the lower end of the infusion tube, an anti-reflux tube is arranged at the position adjacent to the injection needle, a limit tube is arranged on the inner side wall of the anti-reflux tube, a gravity ball is arranged in the anti-reflux tube and used for sealing a buoyancy ball of the anti-reflux tube at the limit tube, the gravity ball is positioned between the buoyancy ball and the injection needle, the gravity of the gravity ball is larger than the sum of the buoyancy of the gravity ball and the buoyancy ball in infusion liquid, and the buoyancy ball is in contact fit with the surface of the end face of the limit tube, which is close to the injection needle.

Preferably, the two ends of the backflow prevention pipe are communicated with the infusion pipe, the radial section size of the backflow prevention pipe at the inner side is larger than the maximum radial section size of the gravity ball, the radial section size of the backflow prevention pipe at the inner side is larger than the maximum radial section size of the buoyancy ball, and the inner side surface of the backflow prevention pipe is provided with a limiting block between the injection needle and the gravity ball.

Preferably, the end face, close to the injection needle, of the limiting tube is a conical curved surface, and the maximum radial cross section size of the buoyancy ball is larger than the radial cross section size of the limiting tube at the inner side.

Preferably, the infusion tube is provided with a drip chamber at one side of the backflow preventing pipe far away from the injection needle, a buoyancy block is arranged in the drip chamber, and a blocking block for closing the liquid outlet of the drip chamber is arranged at the lower side of the buoyancy block.

Preferably, the lower part of the inner side surface of the dropping funnel is of a funnel-shaped structure, and the buoyancy block is of a spherical structure.

Preferably, the infusion tube is provided with a flow speed regulator between the dropping funnel and the backflow prevention pipe, the upper end of the infusion tube is provided with a bottle stopper puncture needle, and the infusion tube is provided with an air filter at the bottle stopper puncture needle.

The utility model provides an anti-reflux intravenous infusion set, which has the beneficial effects that compared with the prior art:

1. when the gravity ball is higher than the gravity ball, the buoyancy ball is in contact with the limit pipe through buoyancy force, so that the buoyancy ball seals the backflow prevention pipe at the limit pipe to prevent liquid from flowing to the upper end of the infusion pipe from the injection needle, at the moment, the liquid can flow to the injection needle from the upper end of the infusion pipe, when the buoyancy ball is lower than the gravity ball, the buoyancy ball is in contact with the limit pipe through the gravity ball, so that the buoyancy ball seals the backflow prevention pipe at the limit pipe to prevent liquid from flowing to the upper end of the infusion pipe from the injection needle, and at the moment, the liquid can flow to the injection needle from the upper end of the infusion pipe, so that blood backflow can be prevented from happening when the height difference between a medicine bottle containing liquid medicine or a medicine bag and a human body infusion part is changed.

2. When normal transfusion, the buoyancy block drives the blocking block to float upwards through buoyancy, the blocking block is prevented from closing the liquid outlet of the drip chamber, so that liquid can flow normally, when the liquid is about to be transfused, the liquid in the drip chamber flows downwards, the position of the buoyancy block is lowered, so that the blocking block is used for closing the liquid outlet of the drip chamber, the liquid circulation at the lower end of the drip chamber is blocked, the transfusion tube at the lower end of the drip chamber is closed, the blood backflow phenomenon is avoided rapidly and effectively, and the use safety is improved.

Drawings

Fig. 1 is a schematic front view of the present utility model.

Fig. 2 is a schematic front view of the present utility model in use.

Fig. 3 is a schematic front view of the utility model showing the change in height between the needle and the stopper needle.

FIG. 4 is an enlarged schematic view of the utility model in the direction A-A.

In the figure: 1 infusion tube, 2 injection needle, 3 backflow prevention pipe, 4 limit pipe, 5 gravity ball, 6 buoyancy ball, 7 drip funnel, 8 buoyancy block, 9 block, 10 flow speed regulator, 11 bottle stopper puncture needle, 12 air filter, 13 limit block.

Detailed Description

The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which may be made by those skilled in the art without the inventive faculty, are intended to be within the scope of the present utility model, and in the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings, which are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance in the description of the present utility model, but rather as being construed broadly as the terms "mounted," "connected," "coupled," or "connected" unless expressly specified or limited otherwise, e.g., as either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.

Referring to fig. 1-3, the present utility model provides a technical solution: the utility model provides an intravenous infusion apparatus of anti-reflux, including transfer line 1, transfer line 1 lower extreme bonds fixed injection needle 2, transfer line 1 bonds fixed anti-reflux pipe 3 in the position of neighbouring injection needle 2, the inboard wall of anti-reflux pipe 3 is gone up and is installed spacing pipe 4, spacing pipe 4 and anti-reflux pipe 3 structure as an organic whole, set up gravity ball 5 in the anti-reflux pipe 3, be used for sealing the buoyancy ball 6 of anti-reflux pipe 3 in spacing pipe 4 department, gravity ball 5 is located between buoyancy ball 6 and injection needle 2, thereby gravity ball 5's gravity is greater than gravity ball 5 and buoyancy ball 6 in infusion liquid's buoyancy sum, thereby the buoyancy ball 6 is gone up and is close to the terminal surface contact cooperation of injection needle 2 with spacing pipe 4, wherein buoyancy ball 6 can be made for plastics floater, also can be other suitable materials, gravity ball 5 is the stainless steel ball, also can be made for other suitable materials, during the use, when the height of buoyancy ball 6 is higher than the height of gravity ball 5, as shown in figure 2, buoyancy ball 6 passes through buoyancy and spacing pipe 4 contact cooperation, thereby buoyancy ball 6 seals anti-reflux pipe 4 in spacing pipe 4 department, thereby prevent that liquid flow to be in the infusion line 2 from top of the position of gravity ball 1 and the injection needle 2, thereby the infusion needle 1 is located at the height of the position of the infusion needle 2, can be reached from the height-stop liquid medicine flow to the tip 1, when the height of the infusion needle is located at the height of infusion needle 1, can be reached from the height-stop position of the injection needle 1, and the infusion needle is down, when the height is like.

In an embodiment, two ends of the backflow prevention pipe 3 are communicated with the infusion pipe 1, two ends of the backflow prevention pipe 3 are fixedly adhered to the infusion pipe 1, the radial cross-sectional dimension of the backflow prevention pipe 3 at the inner side is larger than the maximum radial cross-sectional dimension of the gravity ball 5, the radial cross-sectional dimension of the backflow prevention pipe 3 at the inner side is larger than the maximum radial cross-sectional dimension of the buoyancy ball 6, limiting blocks 13 are arranged between the injection needle 2 and the gravity ball 5 on the inner side surface of the backflow prevention pipe 3, the limiting blocks 13 are fixedly adhered to the backflow prevention pipe 3, the number of the limiting blocks 13 is four or the like, the positions of gravity blocks are limited by the limiting blocks 13, the gravity ball 5 is prevented from blocking one end, close to the injection needle 2, of the backflow prevention pipe 3, the gravity ball 5 does not influence the flow of liquid in the backflow prevention pipe 3, and the buoyancy ball 6 does not influence the flow of the liquid at other positions except the limiting pipes 4 in the backflow prevention pipe 3.

In an embodiment, the end face of the limiting tube 4, which is close to the injection needle 2, is a conical curved surface, the maximum radial cross-sectional dimension of the buoyancy ball 6 is larger than the radial cross-sectional dimension of the limiting tube 4 at the inner side, and the buoyancy ball 6 is matched with the end face of the limiting tube 4, which is close to the injection needle 2, so that the buoyancy ball 6 can seal the backflow preventing tube 3 at the limiting tube 4.

In an embodiment, the drip chamber 7 is installed at one side of the backflow preventing pipe 3 far away from the injection needle 2, two ends of the drip chamber 7 are fixedly adhered to the drip chamber 1, a buoyancy block 8 is arranged in the drip chamber 7, the lower side of the buoyancy block 8 is fixedly adhered to a blocking block 9 for sealing the liquid outlet of the drip chamber 7, when normal transfusion is carried out, the buoyancy block 8 drives the blocking block 9 to float upwards through buoyancy, the blocking block 9 is prevented from sealing the liquid outlet of the drip chamber 7, the normal flow of liquid is facilitated, when the liquid is about to be completely infused, the liquid in the drip chamber 7 flows downwards, the position of the buoyancy block 8 is lowered, so that the blocking block 9 seals the liquid outlet of the drip chamber 7, the liquid circulation of the lower end of the drip chamber 7 is blocked, the drip chamber 1 at the lower end of the drip chamber 7 is sealed, the blood backflow phenomenon is avoided rapidly and effectively, and the use safety is improved.

In an embodiment, the lower part of the inner side surface of the dropping funnel 7 is of a funnel-shaped structure, the buoyancy block 8 is of a spherical structure, wherein the buoyancy block 8 is a plastic floating ball, and the blocking block 9 is made of a material which does not float in the infusion liquid, such as a plastic block, so that the blocking block 9 is always positioned under the buoyancy block 8, and the blocking block 9 is convenient to seal the liquid outlet of the dropping funnel 7.

In one embodiment, the infusion tube 1 is provided with a flow rate regulator 10 between the drip chamber 7 and the backflow prevention pipe 3, the upper end of the infusion tube 1 is provided with a bottle stopper puncture needle 11, the infusion tube 1 is provided with an air filter 12 at the bottle stopper puncture needle 11, and the flow rate regulator 10, the bottle stopper puncture needle 11 and the air filter 12 are all components in the prior art.

The present utility model has been described in detail by way of specific embodiments and examples, but these should not be construed as limiting the utility model. Many variations and modifications may be made by one skilled in the art without departing from the principles of the utility model, which is also considered to be within the scope of the utility model.

Claims (6)

1. Anti-reflux intravenous infusion set, including transfer line (1), its characterized in that: injection needle (2) are installed to transfer line (1) lower extreme, transfer line (1) is in the installation of neighbouring injection needle (2) department anti-reflux pipe (3), install spacing pipe (4) on the medial wall of anti-reflux pipe (3), set up gravity ball (5) in anti-reflux pipe (3), be used for sealing buoyancy ball (6) of anti-reflux pipe (3) in spacing pipe (4) department, gravity ball (5) are located between buoyancy ball (6) and injection needle (2), gravity of gravity ball (5) is greater than the buoyancy sum of gravity ball (5) and buoyancy ball (6) in infusion liquid, the terminal surface contact cooperation of being close to injection needle (2) on buoyancy ball (6) and spacing pipe (4).

2. The anti-reflux iv set of claim 1, wherein: the two ends of the backflow prevention pipe (3) are communicated with the infusion pipe (1), the radial section size of the backflow prevention pipe (3) at the inner side is larger than the maximum radial section size of the gravity ball (5), the radial section size of the backflow prevention pipe (3) at the inner side is larger than the maximum radial section size of the buoyancy ball (6), and a limiting block (13) is arranged between the injection needle (2) and the gravity ball (5) on the inner side surface of the backflow prevention pipe (3).

3. The anti-reflux iv set of claim 1, wherein: the end face, close to the injection needle (2), of the limiting tube (4) is a conical curved surface, and the maximum radial section size of the buoyancy ball (6) is larger than that of the inner side of the limiting tube (4).

4. The anti-reflux iv set of claim 1, wherein: the infusion tube (1) is provided with a dropping funnel (7) at one side of the backflow prevention tube (3) far away from the injection needle (2), a buoyancy block (8) is arranged in the dropping funnel (7), and a blocking block (9) for closing a liquid outlet of the dropping funnel (7) is arranged at the lower side of the buoyancy block (8).

5. The anti-reflux iv set of claim 4, wherein: the lower part of the inner side surface of the dropping funnel (7) is of a funnel-shaped structure, and the buoyancy block (8) is of a spherical structure.

6. The anti-reflux iv set of claim 4, wherein: the infusion tube (1) is provided with a flow speed regulator (10) between the dropping funnel (7) and the backflow prevention pipe (3), the upper end of the infusion tube (1) is provided with a bottle stopper puncture needle (11), and the infusion tube (1) is provided with an air filter (12) at the bottle stopper puncture needle (11).