CN209771004U - Anti-mixing medicine injection channel - Google Patents

Abstract

The utility model relates to an anti-mixing drug injection channel, which includes a tube body and a piston used to block the tube body. The outer wall of the tube body is provided with a piston shell for accommodating the piston. The piston shell is provided with a piston reset piece. The cross section of the medium channel of the tube body is Rectangle, under the action of external force, the piston can move down the piston shell to the pipe body to block the medium channel. After the external force is lost, the piston returns to the piston shell under the action of the piston reset part; The inlet of the injection channel runs through the top surface of the piston, and the outlet of the injection channel runs through the side of the piston. When the piston blocks the medium channel, the injection channel communicates with the medium channel. The utility model adds a positive pressure interface on the tube body. If the drug injection is required, the syringe can be directly connected to the positive pressure interface for injection, the liquid can be automatically blocked, and the original liquid infusion can be restored automatically after the syringe is disconnected. The valve is used together, and the three-way valve does not need to be turned when the medicine is injected, and the operation is simple and convenient to use.

Description

Anti-mixing injection channel

technical field

The utility model relates to the technical field of medical instruments, in particular to an anti-mixing drug injection channel.

Background technique

In clinical work, in order to achieve the purpose of rapid treatment, it is often necessary to open two venous channels for patients. When faced with elderly patients and patients who have been repeatedly hospitalized at work, and the patient's blood vessels are not good, repeated venipuncture in a short period of time will not only increase the pain of the patient, but also cause congestion at the puncture site. Many elderly patients are not easy to indwell superficial vein indwelling needles, and cannot do deep venous catheterization.

In view of this, a three-way valve is used clinically, which can connect the vascular access with two groups of fluids at the same time. When performing intravenous injection, it is necessary to close one of the ports of the three-way valve and connect the disconnected port to the syringe for drug injection. Repeated disconnection and connection are not only easy to contaminate the interface and cause infection, but also some nurses forget to inject the drug after injecting the drug. Restoration of the three-way fluid access led to discontinuation of the drug infusion.

Utility model content

The utility model aims to provide an anti-mixing drug injection channel, and a positive pressure interface is set. If the drug injection is required, it can be directly connected to the syringe injection from the positive pressure interface, and the liquid can be automatically blocked without turning the tee. Liquid infusion, simple operation and convenient use.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

Anti-mixing drug injection channel, including a tube body and a piston for blocking the tube body, the outer wall of the tube body is provided with a piston shell for accommodating the piston, the lower end of the piston shell is fixedly connected with the tube body, and a piston reset member is arranged in the piston shell , the piston is connected to the piston reset part, the cross section of the medium passage of the pipe body is rectangular, the piston is a hexahedron matching the medium passage, and the piston can move down the piston shell to the pipe body to block the medium under the action of external force channel, after the external force is lost, the piston returns to the piston housing under the action of the piston reset member;

The top surface of the piston housing is open, and an injection channel is provided in the piston. The inlet of the injection channel runs through the top surface of the piston, and the outlet of the injection channel runs through the side of the piston. When the piston blocks the medium channel, the injection channel and The medium channels communicate with each other.

Further, the inlet of the injection channel is provided with a one-way device.

Preferably, the one-way device is a one-way valve.

Further, the inlet of the injection channel is provided with a needle interface adapted to the syringe.

Wherein, the piston reset member is an elastic band.

Alternatively, the piston reset member is a spring.

Further, the anti-mixing drug injection channel also includes a three-way valve, one end of the pipe body is connected to one port of the three-way valve, and when the piston blocks the medium channel, the injection channel is not communicated with the three-way valve.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model adds a positive pressure interface on the tube body. If the drug injection is needed, it can be directly connected to the syringe from the positive pressure interface for injection, the liquid is automatically blocked, and the original liquid infusion is automatically restored after the syringe is disconnected. The operation is simple and the use is convenient; It is especially suitable for use with a three-way valve, and there is no need to turn the three-way valve when injecting medicine.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 when the pipe body is opened;

Fig. 2 is a schematic structural view of Embodiment 1 when the pipe body is closed;

Fig. 3 is a sectional view at A place in Fig. 2;

Fig. 4 is the structural representation of embodiment two when the pipe body is opened;

Figure 5 is a schematic structural view of Embodiment 2 when the tube body is closed

Fig. 6 is the structural representation of embodiment three;

In the figure: 1-tube body, 2-piston shell, 3-piston, 4-piston reset member, 51-needle interface, 52-injection channel, 53-one-way valve, 6-three-way valve.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

Embodiment one

As shown in Figures 1, 2, and 3, the anti-mixing drug injection channel disclosed in this embodiment includes a tube body 1 and a piston 3 for blocking the tube body 1. The outer wall of the tube body 1 is provided with a piston shell 2 for accommodating the piston 3. The lower end of the piston shell 2 is fixedly connected to the pipe body 1, and the piston shell 2 is provided with a piston reset member 4, and the piston 3 is connected to the piston reset member 4. The cross section of the medium passage of the pipe body 1 is rectangular, and the piston 3 is a Hexahedron, such as cube, cuboid.

Under the action of external force, the piston 3 can move down along the piston housing 2 to the pipe body 1 to block the medium channel. After losing the external force, the piston 3 returns to the piston housing 2 under the action of the piston reset member 4 to seal with the piston housing 2. .

The top surface of the piston housing 2 is open, and the piston 3 is provided with an injection channel 52. The inlet of the injection channel 52 runs through the top surface of the piston 3, and the outlet of the injection channel 52 runs through the side of the piston 3. When the piston 3 blocks the medium channel, the injection Channel 52 communicates with the media channel.

Further, the inlet of the injection channel 52 is provided with a one-way device, preferably, the one-way device is a one-way valve 53, of course, it can also be a one-way valve.

To facilitate the connection with the syringe, the inlet of the injection channel 52 is provided with a needle interface 51 adapted to the syringe. In this embodiment, the piston reset member 4 is an elastic belt, such as a rubber belt.

When in use, press the front end of the syringe against the entrance of the injection channel 52, hold the syringe barrel, push down the piston 3 to the bottom, move the piston 3 to the tube body 1, and block the medium channel of the tube body 1, As shown in Figure 2, at this time, the injection channel 52 communicates with the medium channel of the tube body 1, and the piston rod of the syringe is pushed down, so that the medicinal liquid in the syringe can be pushed into the medium channel through the injection channel 52. After completion, the syringe is taken away, as shown in Figure 1, the piston 3 returns to the piston housing 2 under the action of the piston reset member 4, and the medium channel of the tube body 1 resumes its path.

In this embodiment, if the drug injection is directly connected to the syringe for injection, the liquid in the tube body 1 can be automatically blocked, and the original liquid infusion can be automatically resumed after disconnecting the syringe, which is easy to operate and easy to use.

Embodiment two

The difference between this embodiment and Embodiment 1 is that: as shown in Figures 4 and 5, the piston reset member 4 in this embodiment is a spring, the spring is arranged above the piston 3, the upper end of the spring is connected with the piston housing 2, and the lower end of the spring is connected with the piston 3 upper connection.

Embodiment three

The difference between this embodiment and Embodiment 1 or Embodiment 2 is that: as shown in Figure 6, the anti-mixing drug injection channel also includes a three-way valve 6, and one end of the pipe body 1 is connected to one of the ports of the three-way valve 6, when the piston 3 When the medium channel is blocked, the injection channel 52 is not communicated with the three-way valve 6.

When in use, there is no need to adjust the three-way valve 6, so that the front end of the syringe is against the entrance of the injection channel 52, hold the syringe barrel, push the piston 3 down to the bottom, so that the piston 3 moves to the tube body 1, and the tube body 1 The passage between the three-way valve 6 is blocked. At this time, the injection channel 52 communicates with the medium channel of the tube body 1, and the piston rod of the syringe is pushed down to push the medicinal liquid in the syringe through the injection channel 52. When the injection is completed, the syringe is taken away, the piston 3 returns to the piston housing 2 under the action of the piston reset member 4, and the passage between the pipe body 1 and the three-way valve 6 is restored. In this process, there is no need to rotate the three-way valve 6, and the operation is simple and convenient to use. In this embodiment, a positive pressure interface is added to the rear end of the three-way valve. When the three-way is used, if the drug injection is required, it is directly connected to the syringe from the positive pressure interface, and the liquid is automatically blocked without turning the three-way and disconnecting the syringe. Afterwards, the original liquid infusion is automatically restored, and the operation is simple and convenient to use.

Certainly, the utility model also can have other multiple implementation modes, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (7)

1. Anti-mixing injection channel, it is characterized in that: comprise pipe body and the piston that is used to stop up pipe body, described pipe body outer wall is provided with the piston shell that is used to accommodate piston, described piston shell lower end is affixed with pipe body, and piston shell There is a piston reset part in the middle, the piston is connected with the piston reset part, the cross section of the medium channel of the tube body is rectangular, and the piston is a hexahedron matching the medium channel, and the piston can move down the piston shell to the tube body under the action of external force The medium channel is blocked in the middle, and after the external force is lost, the piston returns to the piston housing under the action of the piston reset member to seal and cooperate with the piston housing; The top surface of the piston housing is open, and an injection channel is provided in the piston. The inlet of the injection channel runs through the top surface of the piston, and the outlet of the injection channel runs through the side of the piston. When the piston blocks the medium channel, the injection channel and The medium channels communicate with each other. 2. The anti-mixing drug injection channel according to claim 1, characterized in that: the inlet of the injection channel is provided with a one-way device. 3. The anti-mixing injection channel according to claim 2, characterized in that the one-way device is a one-way valve. 4. The anti-mixing medicine injection channel according to claim 1, 2 or 3, characterized in that: a needle interface adapted to a syringe is provided at the entrance of the injection channel. 5. The anti-mixing drug injection channel according to claim 1, characterized in that the piston reset member is an elastic belt. 6. The anti-mixing drug injection channel according to claim 1, characterized in that the piston reset member is a spring. 7. The anti-mixing drug injection channel according to claim 1, characterized in that: it also includes a three-way valve, one end of the pipe body is connected to one of the ports of the three-way valve, when the piston blocks the medium channel, the injection The channel does not communicate with the three-way valve.