Automatic transfusion interruption device convenient for residual liquid treatment

Abstract

The utility model relates to an infusion device with an automatic interruption function. The infusion device is specially designed for preventing blood from flowing back and air from entering blood vessels after infusion is finished. According to the infusion device, a floater structure is arranged in a dropper, the floater is composed of an ejector pin, a cavity, a lower conical part and a counterweight iron ball, and an infusion channel is automatically opened and closed through balance of buoyancy and gravity. When liquid in the dropper is gradually reduced, the floater loses buoyancy and sinks, the lower conical part is in sealing fit with the dropper outlet, and an infusion channel is automatically interrupted. Meanwhile, the detachable magnet is arranged at the top of the dropper, medical staff can move the floater upwards by manually operating the magnet, and the channel is opened again to discharge residual liquid in the dropper. The design is simple and practical, the safety in the infusion process is ensured, residual liquid in the dropper is conveniently treated, and the infusion dropper is suitable for being widely applied to medical scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to a device for automatically interrupting infusion, in particular to an infusion device capable of automatically closing infusion channel and facilitating residual liquid treatment at the end of infusion, which is suitable for safe application of medical infusion. BACKGROUND

[0002] The conventional infusion device usually includes a needle, a drip tube, a control valve and a needle, etc. In the traditional design, the infusion channel is not equipped with an automatic control device. When the liquid in the infusion bottle is exhausted, if the medical staff or the patient fails to close the control valve or pull out the needle in time, it is easy to cause the blood to flow back to the infusion pipeline or the air to enter the blood vessel, which poses a potential health risk. At present, there are some devices for automatically interrupting infusion, which control the closing of the infusion pipeline by using the float device and the action of buoyancy and gravity, so as to avoid the problems of blood backflow or air entering. However, the structure of these designs often fails to completely remove the residual liquid in the drip tube, which may cause inaccurate drug dosage and increase the difficulty of subsequent treatment. SUMMARY

[0003] The utility model aims at providing an improved infusion device which can automatically close the infusion channel at the end of infusion, prevent blood backflow and air entering, and facilitate the subsequent treatment of residual liquid in the drip tube.

[0004] Therefore, the device introduces the design of float structure and detachable magnet on the basis of the traditional infusion device. The float device is installed in the drip tube and mainly consists of a thimble, a cavity, a lower conical part and a counterweight iron ball. The cavity is filled with air, which provides the necessary buoyancy to make the float float when there is liquid and keep the channel unobstructed; when the liquid is exhausted, the float sinks to the bottom of the drip tube, the lower conical part tightly fits the outlet of the drip tube, and the channel is automatically closed. In addition, the top of the drip tube is provided with a detachable magnet, and the medical staff can manually operate the magnet to move the float up to the top of the drip tube, re-open the channel and facilitate the discharge of residual liquid.

[0005] This design not only automatically closes the channel when the liquid is exhausted to ensure the safety of the infusion process, but also completes the discharge of residual liquid through simple operation, which is suitable for large-scale manufacturing and practical application.

[0006] Advantages

[0007] The utility model has the following advantages:

[0008] 1. Automatic interruption of infusion: the float device automatically sinks to close the infusion channel when the liquid is exhausted, which avoids the risk of blood backflow or air entering the blood vessel.

[0009] 2. Convenient treatment of residual liquid: the detachable magnet can manually control the movement of the float to smoothly discharge the residual liquid from the drip tube, ensuring accurate drug dosage.

[0010] 3. Simple structure, easy to manufacture: low design cost, easy to mass-produce, suitable for popularization and application in various medical scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 : The longitudinal section structure diagram of the dropper of the device.

[0012] Figure 2 : The state diagram of the float rising when liquid exists, keeping the infusion channel unblocked.

[0013] Figure 3 : The state diagram of the liquid being exhausted, the float sinking to close the channel.

[0014] Figure 4 : The state diagram of the float being attracted to the top after installing the magnet, and the residual liquid flowing out. DETAILED DESCRIPTION

[0015] As shown in Figure 1 , the float structure of the device is composed of a top needle (2), a cavity (3), a lower conical part (4), and a counterweight iron ball (5). The dropper (1) is provided with a detachable magnet (6) at the top, which is used to manually control the movement of the float. During normal infusion, the float floats on the liquid surface due to the buoyancy of the liquid, keeping the channel open. When the liquid is almost exhausted, the float sinks due to gravity, and the lower conical part fits the dropper outlet, automatically closing the channel. If it is necessary to drain the residual liquid in the dropper, medical personnel only need to install a magnet, and the float will be attracted to the top of the dropper, the channel will be reopened, and the residual liquid will be drained.

Claims

1. An infusion device comprising a drip tube and a float device, characterized in that: the float device is installed in the drip tube, and the float is composed of a top needle (2), a cavity (3), a lower taper (4) and a counterweight iron ball (5), and the top of the drip tube is provided with a detachable magnet (6) for automatic control of the opening and closing of the infusion channel.

2. The infusion device according to claim 1, characterized in that: the float device floats when the liquid is full, maintaining the infusion channel unobstructed; when the liquid is exhausted, the float sinks due to gravity, automatically closing the infusion channel to prevent backflow of blood.

3. The infusion device according to claim 1 or 2, characterized in that: the top needle (2) of the float device prevents blockage of the liquid inlet when the float rises to the top of the drip tube, ensuring smooth flow of the liquid.

4. The infusion device according to claim 1 or 2, characterized in that: the cavity (3) contains gas to provide buoyancy, causing the float to float when the liquid is full.

5. The infusion device according to claim 1 or 2, characterized in that: the lower taper (4) is shaped to match the inner wall of the drip tube, sealingly fitting the bottom of the drip tube when the float sinks, automatically interrupting the infusion channel.

6. The infusion device according to claim 1, characterized in that: the counterweight iron ball (5) causes the float to sink due to gravity after the liquid is exhausted and automatically closes the infusion channel.

7. The infusion device according to claim 1, characterized in that: the detachable magnet (6) moves the float upward by attraction, manually controlling the opening of the channel, facilitating the removal of residual liquid in the drip tube.

8. The infusion device according to claim 7, characterized in that: the position of the detachable magnet (6) can be adjusted to achieve precise control of the float, suitable for channel opening and closing in different states.

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