CN216855404U

CN216855404U - Infusion tube capable of exhausting air rapidly

Info

Publication number: CN216855404U
Application number: CN202122879455.3U
Authority: CN
Inventors: 柴建华
Original assignee: Chongzhou people's hospital
Current assignee: Chongzhou people's hospital
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-07-01
Anticipated expiration: 2031-11-23

Abstract

The utility model relates to the field of medical instruments, in particular to a transfusion tube capable of exhausting air rapidly, which comprises a main transfusion tube assembly and a branch tube assembly, wherein one end of the main transfusion tube assembly is provided with a vein needle, one end of the branch tube assembly is provided with a bottle stopper puncture needle, a dropper assembly is arranged between the main transfusion tube assembly and the branch tube assembly and is communicated with the main transfusion tube assembly and the branch tube assembly, the dropper assembly comprises a dropper main body and a piston assembly, and the piston assembly moves in the dropper main body to suck liquid medicine into the dropper main body and exhaust air in the branch tube assembly. According to the infusion tube capable of exhausting air rapidly, the piston assembly moves in the dropper main body, negative pressure is generated in the dropper main body, so that liquid medicine is sucked into the dropper main body rapidly, air in the branch tube assembly is exhausted into the dropper main body when the liquid medicine passes through the branch tube assembly, and the purpose of rapidly exhausting the air in the branch tube assembly is achieved.

Description

Infusion tube capable of exhausting air rapidly

Technical Field

The utility model relates to the field of medical instruments, in particular to a transfusion tube capable of exhausting air rapidly.

Background

Intravenous infusion is a therapeutic method by which large quantities of sterile solutions or drugs are infused intravenously. Intravenous infusion is the infusion of liquid into the body by the physical principle of hydrostatic pressure. In clinic, intravenous infusion is a common administration route in clinic, and a disposable infusion set is used clinically for years as a necessary device for intravenous infusion.

The disposable infusion set brings convenience to clinical treatment and nursing operation, can prevent cross infection, can bear the economic standard of people at present, and is widely applied to medical units at all levels.

Medical personnel need carry out the exhaust operation to disposable transfusion system earlier when carrying out venous transfusion to patient, and it is internal to avoid the air entering patient in the transfer line, causes dangerous emergence among the treatment process. The general venting method is as follows: lifting the lower-section infusion tube of the Murphy's dropper up in a middle hand disk, enabling the Murphy's dropper to turn back and up to open the infusion tube regulator, closing the regulator when observing that liquid flows into the Murphy's dropper to 1/3, immediately putting the infusion tube in the lower hand, and opening the regulator after a small amount of air below the Murphy's dropper automatically escapes to the liquid level in the Murphy's dropper to enable the liquid to flow in a dripping shape and not to form a linear shape, so that the air at the upper part of the Murphy's dropper can be pressed into the lower-section tube to form more bubbles due to large linear pressure; when the liquid medicine flows out from the needle head, the regulator can be pushed upwards to the position below the Murphy's dropper to be tightly closed, so as to achieve the purpose of exhausting air.

The method can achieve a good exhaust effect in practical application, but still has the defects that in the process that liquid flows into the Murphy's dropper to the position 1/3, the liquid flows slowly due to the existence of gas in a transfusion pipeline, and at the moment, medical staff usually curls a transfusion tube with air or extrudes the Murphy's dropper to exhaust the gas from the Murphy's dropper, but the method needs to be operated by experienced medical staff, not only wastes time and labor, but also the gas is not easy to be exhausted, so that the patient is easy to panic, and even unnecessary medical dispute is caused.

Therefore, there is a need for a rapid-venting infusion tube, which can solve the problem of slow liquid flow caused by the presence of gas in the infusion tube during the process of liquid flowing into the Murphy's dropper to 1/3 when the disposable infusion tube vents air.

Disclosure of Invention

The utility model aims to: aiming at the problem that liquid flows slowly due to the existence of gas in a liquid conveying pipeline in the process that liquid flows into a Murphy's dropper to 1/3 when a disposable infusion set in the prior art performs air exhaust operation, the infusion pipe capable of exhausting air quickly is provided.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a quick carminative transfer line, includes main transfer line subassembly and branch pipe subassembly, the one end of main transfer line subassembly is provided with the vein needle, the one end of branch pipe subassembly is provided with the bottle plug pjncture needle, main transfer line subassembly with be provided with burette subassembly between the branch pipe subassembly, burette subassembly intercommunication main transfer line subassembly with the branch pipe subassembly, burette subassembly includes burette main part and piston assembly, piston assembly is in burette main part internalization absorbs the liquid medicine and arrives in the burette main part and get rid of air in the branch pipe subassembly.

By adopting the infusion tube capable of exhausting air rapidly, which is disclosed by the utility model, the piston assembly moves in the dropper main body, so that negative pressure is generated in the dropper main body, the liquid medicine is rapidly sucked into the dropper main body, and air in the branch tube assembly is discharged into the dropper main body when the liquid medicine passes through the branch tube assembly, so that the aim of rapidly discharging the air in the branch tube assembly is fulfilled.

Preferably, a liquid passage is arranged in the piston assembly, and the liquid passage is communicated with the dropper main body and the main infusion tube assembly, so that the liquid medicine in the dropper main body can flow into the main infusion tube assembly through the liquid passage. By adopting the structure, the liquid channel and the piston assembly are integrated, so that the structure of the dropper assembly is simplified, and the novel dropper is more convenient in clinical use.

Preferably, the piston assembly comprises a piston and a piston shaft, and the piston shaft are connected in an integrated manner. By adopting the structure, the connection between the piston and the piston shaft is tighter, the sealing performance of the liquid channel is ensured, and the waste caused by the leakage of the liquid medicine out of the dropper component is avoided.

Preferably, a recess is formed in one surface, contacting the liquid medicine, of the piston, and the recess collects the liquid medicine in the dropper main body, so that waste caused by the liquid medicine remaining in the dropper main body is avoided.

Preferably, a rubber sealing ring is arranged on the surface of the piston, the sealing performance between the piston assembly and the dropper main body is improved by the rubber sealing ring, and the liquid medicine is prevented from leaking from a gap between the piston assembly and the dropper to cause waste of the liquid medicine.

Preferably, the surface of the rubber sealing ring contacting the dropper main body is provided with an annular protrusion, and the annular protrusion reduces the friction force between the piston assembly and the dropper main body, so that the movement of the piston assembly in the dropper main body can be smooth.

Preferably, the number of the annular protrusions is not less than 4, so that the piston assembly can slide in the dropper main body smoothly, and meanwhile, the sealing performance between the piston assembly and the dropper assembly can be guaranteed.

Preferably, the end of the piston shaft away from the piston is further provided with a step, and the step enables the piston assembly to have a better acting point when pushed.

Preferably, the piston shaft is made of hard silica gel material. By adopting the structure, the piston shaft has better structural strength and can better push the piston to move in the dropper main body.

Preferably, the dropper body is made of hard silica gel material. By adopting the structure, the phenomenon that liquid medicine cannot flow into the dropper main body due to the fact that the dropper main body is shriveled by atmospheric pressure when negative pressure is generated in the dropper main body is avoided.

Preferably, a blocking part is arranged on the side wall of one end, close to the branch pipe assembly, of the dropper main body, and the blocking part limits the range of movement of the piston assembly below the blocking part.

Preferably, the range of the blocking part is one third of the whole dropper body.

Preferably, a clamping groove is formed in the side wall of the dropper main body, which is close to one end of the main infusion tube assembly, and the clamping groove is matched with the annular protrusion, so that the piston assembly is fixed in the clamping groove. By adopting the structure, the occurrence of medical accidents caused by the fact that the piston assembly moves in the dropper main body due to the mistaken touch of a patient or accidents after the air exhaust is finished is avoided.

Preferably, the dropper main body is further provided with an air outlet which discharges air in the dropper main body, so that the filling of the liquid medicine into the dropper main body is further accelerated.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. according to the infusion tube capable of exhausting air rapidly, the piston assembly moves in the dropper main body, negative pressure is generated in the dropper main body, so that liquid medicine is sucked into the dropper main body rapidly, air in the branch tube assembly is exhausted into the dropper main body when the liquid medicine passes through the branch tube assembly, and the purpose of rapidly exhausting the air in the branch tube assembly is achieved;

2. according to the infusion tube capable of exhausting air rapidly, the piston assembly comprises the piston and the piston shaft, the piston and the piston shaft are connected in an integrated forming mode, the strength of the piston assembly is enhanced, a recess is formed in one surface, contacting with liquid medicine, of the piston, the recess collects the liquid medicine in the dropper main body, waste caused by the fact that the liquid medicine is remained in the dropper main body is avoided, a rubber sealing ring is arranged on the surface of the piston, the sealing performance between the piston assembly and the dropper main body is improved through the rubber sealing ring, an annular bulge is further arranged on the surface of the rubber sealing ring, the friction force matched between the piston assembly and the dropper main body is reduced through the annular bulge, and the movement of the piston assembly in the dropper main body can be smooth;

3. the burette main body is made of hard silica gel materials, so that the phenomenon that liquid medicine cannot flow into the burette main body due to the fact that the burette main body is shrunken by atmospheric pressure is avoided, the side wall of one end, close to the branch pipe assembly, of the burette main body is provided with the blocking part which limits the range of the piston assembly below the blocking part to move, the phenomenon that medical staff cannot judge the dropping speed of the liquid medicine due to the fact that too much liquid medicine is stored in the burette main body is avoided, the side wall, close to one end of the main burette main body, of the burette main body is provided with the clamping groove, the clamping groove is matched with the annular bulge, the piston assembly is fixed in the clamping groove, the phenomenon that the piston assembly moves in the burette main body to cause a medical accident is avoided, and the burette main body is further provided with the exhaust port, the air in the dropper main body is discharged from the air outlet, so that the filling of the liquid medicine into the dropper main body is further accelerated.

Drawings

FIG. 1 is a schematic view of the construction of a rapid exhaust infusion tube as described in example 1;

FIG. 2 is a schematic view of the drop tube assembly of FIG. 1;

FIG. 3 is a schematic view of an adjusted drop tube assembly;

figure 4 is a schematic view of a piston assembly in the drop tube assembly.

The labels in the figure are: 1-main infusion tube assembly, 2-branch tube assembly, 3-intravenous needle, 4-cork puncture needle, 5-dropper assembly, 6-dropper body, 7-piston assembly, 8-regulator, 9-filtering device, 10-liquid channel, 11-piston, 12-piston shaft, 13-recess, 14-rubber sealing ring, 15-annular projection, 16-step, 17-blocking part, 18-exhaust port and 19-clamping groove.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Example 1

As shown in fig. 1 to 4, the infusion tube capable of exhausting air rapidly disclosed by the utility model comprises a main infusion tube assembly 1 and a branch tube assembly 2, wherein one end of the main infusion tube assembly 1 is provided with a vein needle 3, one end of the branch tube assembly 2 is provided with a bottle stopper puncture needle 4, a dropper assembly 5 is arranged between the main infusion tube assembly 1 and the branch tube assembly 2, the dropper assembly 5 is communicated with the main infusion tube assembly 1 and the branch tube assembly 2, the dropper assembly 5 comprises a dropper main body 6 and a piston assembly 7, and the piston assembly 7 moves in the dropper main body 6 to suck a liquid medicine into the dropper main body 6 and exhaust air in the branch tube assembly 2.

By adopting the infusion tube capable of exhausting air rapidly, which is disclosed by the utility model, the piston assembly 7 moves in the dropper main body 6, so that negative pressure is generated in the dropper main body 6, the liquid medicine is rapidly sucked into the dropper main body 6, and air in the branch tube assembly 2 is exhausted into the dropper main body 6 when the liquid medicine passes through the branch tube assembly 2, so that the aim of rapidly exhausting air in the branch tube assembly 2 is fulfilled.

The main infusion tube assembly 1 further comprises a regulator 8 and a filtering device 9, the regulator 8 is used for regulating the flow speed of liquid in the infusion tube, and the filtering device 9 is used for filtering precipitates and impurities in the liquid medicine to ensure the purity of the liquid medicine input into a patient; when the piston assembly 7 moves in the dropper main body 6, the regulator 8 needs to be regulated, so that the infusion tube is clamped by the regulator 8, and air is prevented from entering the dropper main body 6 from the intravenous needle 3, and the negative pressure generated in the dropper main body 6 is not enough to enable the liquid medicine to quickly fill the dropper main body 6.

Example 2

As shown in fig. 2, 3 and 4, in the rapid air exhaust infusion tube of the present invention, a liquid passage 10 is provided inside the piston assembly 7, and the liquid passage 10 communicates the dropper body 6 with the main infusion tube assembly 1, so that the liquid medicine in the dropper body 6 can flow into the main infusion tube assembly 1 through the liquid passage 10. By adopting the structure, the liquid channel 10 and the piston assembly 7 are arranged into a whole, so that the structure of the dropper assembly 5 is simplified, and the novel dropper is more convenient in clinical use.

Example 3

As shown in fig. 2, 3 and 4, in the infusion tube with rapid air exhaust according to the present invention, the piston assembly 7 includes a piston 11 and a piston shaft 12, and the piston 11 and the piston shaft 12 are connected by an integral molding. By adopting the structure, the connection between the piston 11 and the piston shaft 12 is tighter, the sealing performance of the liquid channel 10 is ensured, and the waste caused by the leakage of the liquid medicine out of the dropper component 5 is avoided.

In this embodiment, since the liquid passage 10 and the piston assembly 7 are integrated, the inventor considers that if the piston 11 and the piston shaft 12 are designed to be separated and connected into a whole through a connecting member, which cannot achieve absolutely reliable connection and fixation, in the actual use, a medical worker pushes and pulls the piston assembly 7 to generate negative pressure in the dropper main body 6, so that the medical solution can be quickly filled in the dropper main body 6, in the process of pushing and pulling by the medical worker, the piston 11 and the piston shaft 12 connected through the connecting member may be loose in connection or even broken in connection, which not only causes waste of the medical solution, but also if the connection between the piston 11 and the piston shaft 12 is found to be loose in connection during the infusion process, the infusion tube needs to be replaced, and an infusion path is newly established for a patient, thus, the pain of the patient in the second treatment is caused, and the establishment of good doctor-patient relationship is not facilitated. In this embodiment, the piston 11 and the piston shaft 12 are connected by integral molding, so that the connection between the piston 11 and the piston shaft 12 is more tight.

In a preferred embodiment of the present invention, a recess 13 is formed on a surface of the piston 11 contacting the liquid medicine, and the recess 13 collects the liquid medicine in the dropper body 6, so as to prevent the liquid medicine from remaining in the dropper body 6 and causing waste. Specifically, one surface of the piston 11 contacting the liquid medicine is folded from the edge of the piston 11 to the edge of the liquid channel 10 to form an inverted funnel shape, and the liquid medicine is converged to a relatively low-lying part of the piston 11, namely, the liquid medicine channel under the action of potential energy, so that the liquid medicine in the dropper body 6 can completely flow into the liquid medicine channel.

As a preferable mode of the present embodiment, a rubber packing 14 is provided on a surface of the piston 11, and the rubber packing 14 increases a sealing property between the piston assembly 7 and the dropper body 6, thereby preventing the chemical solution from leaking from a gap where the piston assembly 7 and the dropper are fitted to each other, and thus preventing the waste of the chemical solution.

Specifically, the piston 11 is in a slidable clearance fit in the dropper body 6, and at this time, a clearance exists between the piston 11 and the dropper body 6, when the chemical liquid flows into the dropper body 6, the chemical liquid leaks from the gap between the piston 11 and the dropper body 6, resulting in waste of the chemical liquid, because a gap exists between the piston 11 and the dropper main body 6, the liquid medicine is not in an absolutely sterile environment when flowing in the infusion tube, cross infection of patients is easily caused in the treatment process, therefore, the rubber seal 14 is arranged on the surface of the piston 11, so that the sealing performance between the piston assembly 7 and the dropper body 6 is improved, the liquid medicine is prevented from leaking from a clearance between the piston assembly 7 and the dropper, and the safety of the novel medicine bottle in clinical use is improved.

As a preferable aspect of the present embodiment, an annular protrusion 15 is disposed on a surface of the rubber seal contacting the dropper body 6, and the annular protrusion 15 reduces a frictional force between the piston assembly 7 and the dropper body 6, so that the piston assembly 7 can move smoothly in the dropper body 6.

In practical applications of the present embodiment, the inventor found that, although the rubber seal 14 is disposed on the surface of the piston 11, the sealing performance between the piston assembly 7 and the dropper body 6 is improved, thereby avoiding waste of the liquid medicine, and the safety of the present invention in clinical use is also improved, the rubber seal 14 also increases the friction force between the piston 11 and the dropper body 6, thereby making it difficult to push the piston assembly 7, and based on this, the inventor disposed the annular protrusion 15 on the surface of the rubber seal 14, so as to reduce the friction force between the piston 11 and the dropper body 6, and at the same time, ensure the sealing performance when the piston 11 and the dropper body 6 are engaged with each other.

As a preferable scheme of this embodiment, the number of the annular protrusions 15 is not less than 4, so that the piston assembly 7 can smoothly slide in the dropper body 6, and the sealing performance between the piston assembly 7 and the dropper assembly 5 can be ensured.

In practical use, in this embodiment, since the piston assembly 7 needs to move in the dropper body 6, the annular protrusion 15 is irregularly deformed under the action of friction force, and if only one annular protrusion 15 is provided at this time, the portion of the annular protrusion 15 that is deformed greatly loses the sealing effect, so that the liquid medicine leaks from the maximum deformation position of the annular protrusion 15, the inventor considers that the annular protrusion 15 is provided redundantly, and in this embodiment, the inventor sets the annular protrusion 15 to 4 times based on the contact area between the piston 11 and the dropper body 6 and the smooth sliding degree of the piston assembly 7 in the dropper body 6.

Example 4

As shown in fig. 2, 3 and 4, in the infusion tube with rapid air exhaust according to the present invention, the end of the piston shaft 12 away from the piston 11 is further provided with a step 16, and the step 16 provides a better force application point when the piston assembly 7 is pushed/pulled.

In practical applications, the inventor found that the piston shaft 12 is provided with the liquid medicine passage inside, and the size of the liquid medicine passage matches with the overall size of the infusion tube, so the piston shaft 12 cannot be set too large, which causes that the contact area between the hand of the medical staff and the piston shaft 12 is too small when pushing/pulling the piston assembly 7, and it is difficult to push/pull the piston assembly 7, especially in summer, the hand sweat occurs in the hand of the medical staff, and when pushing/pulling the piston assembly 7, a slip situation occurs, and it is more difficult to push/pull the piston assembly 7. The inventor has provided the step 16 on the piston shaft 12 with a firm point of force when the medical staff pushes/pulls the piston assembly 7, making the piston assembly 7 easier to push.

As a preferable solution of this embodiment, the piston shaft 12 is made of a hard silicone material. By adopting the structure, the piston shaft 12 has better structural strength and can better push the piston 11 to move in the dropper main body 6.

This is novel in clinical use, medical personnel need push and pull repeatedly when the operation piston assembly 7, just can make the liquid medicine can be sufficient fast burette main part 6, will the material of piston shaft 12 sets up to hose silica gel material, then piston assembly 7 can only be by the pulling, piston assembly 7 can't make the liquid medicine sufficient in a pulling burette main part 6, so, the inventor will piston shaft 12 sets up to the stereoplasm silica gel material, makes piston assembly 7 can be promoted to let the liquid medicine can be sufficient fast burette main part 6.

Example 5

As shown in fig. 2 and 3, in the infusion tube for rapidly exhausting air in the present invention, the dropper body 6 is made of a hard silica gel material. With this arrangement, it is avoided that the liquid medicine is not allowed to flow into the dropper body 6 due to the liquid medicine being deflated by atmospheric pressure when negative pressure is generated in the dropper body 6.

As a preferable mode of the present embodiment, a blocking portion 17 is disposed on a side wall of one end of the dropper body 6 close to the branch tube assembly 2, and the blocking portion 17 limits the movement of the piston assembly 7 in a range below the blocking portion 17, so that it is avoided that the medical staff cannot judge the dropping speed of the liquid medicine because of excessive liquid medicine stored in the dropper body 6.

In this embodiment, the dropper body 6 has a function of displaying a liquid medicine delivery speed, and a medical worker determines the liquid medicine delivery speed by observing the number of liquid medicine drops in the dropper body 6 per unit time, and if the range of movement of the piston assembly 7 in the dropper body 6 is not limited, the dropper body 6 may be filled with the liquid medicine, and at this time, the liquid medicine drop opening in the dropper body 6 is completely immersed in the liquid medicine, and the medical worker cannot observe the drops of the liquid medicine, and thus cannot determine the liquid medicine delivery speed. For the above reasons, the inventor sets a blocking portion 17 on the side wall of the dropper body 6 near one end of the branch tube assembly 2, so as to limit the range of movement of the piston assembly 7 in the dropper body 6, and avoid that the dropper body 6 stores too much liquid medicine, which results in that medical staff cannot judge the dropping speed of the liquid medicine.

In a preferred embodiment of the present invention, the range of the stopper 17 is one third of the entire range of the dropper body 6.

As a preferable scheme of this embodiment, a clamping groove 19 is formed on a side wall of the dropper body 6 close to one end of the main infusion tube assembly 1, and the clamping groove 19 is matched with the annular protrusion 15, so that the piston assembly 7 is fixed in the clamping groove 19. By adopting the structure, the occurrence of medical accidents caused by the fact that the piston assembly 7 moves in the dropper main body 6 due to the mistaken touch or accident of the patient after the exhaust is finished is avoided

In a preferred embodiment of the present invention, the dropper main body 6 is further provided with an air outlet 18, and the air outlet 18 discharges air in the dropper main body 6, thereby further accelerating the filling of the dropper main body 6 with the liquid medicine.

When the piston assembly 7 moves in the dropper main body 6, negative pressure is generated in the dropper main body 6, so that the liquid medicine is quickly sucked into the dropper main body 6, air in the branch pipe assembly 2 is discharged into the dropper main body 6 when the liquid medicine passes through the branch pipe assembly 2, at the moment, the regulator 8 is opened by medical personnel, the air in the dropper main body 6 flows into the main infusion pipe assembly 1 and is discharged out of an infusion pipeline along with the liquid medicine through the intravenous needle 3, but when the air in the main infusion pipe assembly 1 is too much, the intravenous needle 3 cannot quickly discharge the air in the main infusion pipe assembly 1, when the regulator 8 is opened by the medical personnel, the air in the infusion pipe main body 6 and the main infusion pipe assembly 1 interact with each other, the liquid medicine in the infusion pipe may not smoothly circulate, and the air discharge time of the main infusion pipe assembly 1 is increased, therefore, the inventor arranges the exhaust port 18 on the dropper main body 6, so that the air in the branch tube assembly 2 is exhausted by the exhaust port 18 when flowing to the dropper main body 6, and further, the interaction between the air in the branch tube assembly 2 and the air in the main infusion tube assembly 1 is avoided, and the exhaust time of the main infusion tube assembly 1 is prolonged.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a quick carminative transfer line, its characterized in that, includes main transfer line subassembly (1) and branch pipe subassembly (2), the one end of main transfer line subassembly (1) is provided with vein needle (3), the one end of branch pipe subassembly (2) is provided with bottle stopper pjncture needle (4), main transfer line subassembly (1) with be provided with burette subassembly (5) between branch pipe subassembly (2), burette subassembly (5) intercommunication main transfer line subassembly (1) with branch pipe subassembly (2), burette subassembly (5) include burette main part (6) and piston assembly (7), piston assembly (7) can burette main part (6) internalization is inhaled the liquid medicine and is got in burette main part (6) and remove air in the branch pipe subassembly (2).

2. The rapid exhaust infusion tube according to claim 1, wherein a liquid passage (10) is provided inside the piston assembly (7), and the liquid passage (10) communicates the dropper body (6) with the main infusion tube assembly (1), so that the liquid medicine in the dropper body (6) can flow into the main infusion tube assembly (1) through the liquid passage (10).

3. A rapid exhaust infusion tube according to claim 1, wherein the piston assembly (7) comprises a piston (11) and a piston shaft (12), the piston (11) and the piston shaft (12) being connected by an integral molding.

4. The rapid exhaust infusion tube according to claim 1, wherein a recess (13) is formed on one surface of the piston (11) contacting the liquid medicine, and the recess (13) collects the liquid medicine in the dropper body (6).

5. The rapid exhaust infusion tube according to claim 4, wherein the surface of the piston (11) is provided with a rubber sealing ring (14), and the rubber sealing ring (14) increases the sealing performance between the piston assembly (7) and the dropper body (6).

6. The rapid exhaust infusion tube according to claim 5, wherein the surface of the rubber sealing ring (14) contacting the dropper body (6) is provided with an annular protrusion (15), and the annular protrusion (15) reduces the friction force between the piston assembly (7) and the dropper body (6).

7. A rapid-venting infusion tube according to claim 3, wherein the end of the piston shaft (12) remote from the piston (11) is further provided with a step (16), and the step (16) makes the piston assembly (7) have a point of force when pushed/pulled.

8. The rapid exhaust infusion tube according to claim 1, wherein the dropper body (6) is made of hard silica gel.

9. A rapid exhaust infusion tube according to any one of claims 1 and 8, wherein a blocking portion (17) is provided on a side wall of the dropper body (6) near one end of the branch tube assembly (2), and the blocking portion (17) limits the range of movement of the piston assembly (7) below the blocking portion (17).

10. The rapid exhaust infusion tube according to claim 6, wherein a clamping groove (19) is formed in the side wall of the dropper main body (6) close to one end of the main infusion tube assembly (1), and the clamping groove (19) is matched with the annular protrusion (15) to fix the piston assembly (7) in the clamping groove (19).