Infusion apparatus capable of exhausting air automatically

Abstract

The utility model provides an infusion apparatus capable of exhausting air automatically, relates to the technical field of infusion apparatuses, and solves the problem of limited air filtering capacity of a precise filtering device in the prior art. The dropper comprises a dropper body, the bottom of the dropper body is communicated with a communicating pipe inclining downwards, a breather pipe communicated with the communicating pipe is arranged on one side of the dropper body, the upper end of the breather pipe is communicated with the dropper body, and the joint is located at the upper end of the dropper body. The communicating pipe is arranged to discharge liquid medicine in the dropper, the liquid medicine enters the breather pipe, in the process, air in the pipeline is separated from the liquid medicine, the air moves upwards and enters the dropper through the breather pipe, the liquid medicine continues to flow into the pipeline below due to gravity, automatic separation and discharge of the air are achieved, and infusion safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of infusion sets, and particularly relates to an infusion set with automatic air exhaust. Background Art

[0002] As the most commonly used infusion device in clinical practice, an infusion set can supplement water and electrolytes for patients through veins, provide nutritional support, and also deliver medicinal liquids for treatment purposes. However, during the process of infusing liquids, due to reasons such as improper operation or untimely replenishment of fluids, air may enter the infusion device. Especially when air enters the infusion pipeline below the Murphy's dropper, it will be relatively difficult to exhaust the air.

[0003] Currently, the air exhaust methods for the air bubble column below the Murphy's dropper include finger flicking method, winding method, or discharging through the needle seat. The finger flicking method means using fingers to flick the infusion pipeline to make the gas move upward into the Murphy's dropper. This method is useful for small air bubbles but has poor effect on large air bubble columns. When the finger flicking method cannot exhaust the gas, the winding method can be used. The winding method means continuously winding the infusion pipeline with fingers several times below the air bubble column entering the infusion tube until it reaches the Murphy's dropper, and then immediately squeezing forcefully, then the air bubble column can enter the Murphy's dropper. This method may cause the patient's needle tip to be accidentally pulled out and requires re-puncturing, resulting in unplanned injuries. In addition, air can also be discharged through the needle seat below the flow regulator. Rotate the needle seat and the upper hose separately to discharge the air, but this method will discharge the liquid that originally needs to be infused into the patient's body, causing loss of medicinal liquid and having a potential risk of contamination. If air reaches the infusion pipeline below the needle seat, re-puncturing is required to prevent air from entering the vein and causing air embolism. The above-mentioned air exhaust methods are relatively troublesome.

[0004] In order to avoid the operation of manual air exhaust, precision infusion sets are commonly used in clinical practice at present. They have a certain air filtration function. The pore diameter of the filter membrane of the precision filtration infusion set is ≤5um, which can filter more than 95% of the fine particles in the medicinal liquid and can also filter relatively large air. However, the precision filtration device of the precision infusion set is relatively small, and the air that can be filtered is relatively limited. Therefore, an infusion set with automatic air exhaust is designed to solve the above problems. Content of the Utility Model

[0005] Aiming at the problem that the air filtration ability of the above-mentioned precision filtration device is limited, the purpose of the utility model is to provide an infusion set with automatic air exhaust. A communicating pipe is provided to discharge the medicinal liquid in the dropper, and the medicinal liquid then enters the ventilation pipe. During this process, the air in the pipeline will be separated from the medicinal liquid, and the air moves upward through the ventilation pipe and enters the dropper, while the medicinal liquid continues to flow downward into the pipeline below due to gravity, realizing the automatic separation and discharge of air and ensuring the safety of infusion.

[0006] The embodiments of the present utility model are achieved through the following technical solutions:

[0007] An infusion set with automatic air exhaust, including a drip chamber. A communicating tube that is inclined downward is connected to the bottom of the drip chamber. An air vent tube that is connected to the communicating tube is arranged on one side of the drip chamber. The upper end of the air vent tube is connected to the drip chamber and the connection point is located at the upper end of the drip chamber.

[0008] Preferably, both the communicating tube and the air vent tube are rigid tubes.

[0009] Preferably, the air vent tube is arranged parallel to the axis of the drip chamber, and the included angle between the communicating tube and the air vent tube is 45°.

[0010] Preferably, the upper opening of the air vent tube is arranged offset from the upper pipe orifice of the drip chamber.

[0011] Preferably, a first guiding tube is connected to the upper pipe orifice of the drip chamber. The first guiding tube is connected to a medicine needle, and a first protective cap is movably sleeved on the medicine needle.

[0012] Preferably, an air inlet tube is connected to the medicine needle. An air filter is arranged in the air inlet tube, and a sealing plug is arranged at the orifice of the air inlet tube.

[0013] Preferably, a first flow regulator is arranged on the first guiding tube.

[0014] Preferably, the air vent tube is connected to a second guiding tube. The second guiding tube is connected to a liquid medicine filter. The liquid medicine filter is connected to a needle seat. The needle seat is connected to a needle handle through a pipeline, and a puncture needle is arranged on the needle handle. A second protective cap is movably sleeved on the puncture needle.

[0015] Preferably, a second flow regulator is arranged on the second guiding tube.

[0016] Preferably, the needle seat is threadedly connected to the liquid medicine filter.

[0017] The technical solutions of the embodiments of the present utility model have at least the following advantages and beneficial effects:

[0018] The communicating tube is provided to discharge the liquid medicine in the drip chamber. The liquid medicine then enters the air vent tube. During this process, the air in the pipeline will be separated from the liquid medicine. The air moves upward and enters the drip chamber through the air vent tube, while the liquid medicine continues to flow downward into the lower pipeline due to gravity, achieving automatic separation and discharge of the air and ensuring the safety of the infusion. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant accompanying drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a structural schematic diagram provided for the embodiments of the present utility model.

[0021] Icons: 1 - medicine injection needle; 2 - first protective cover; 3 - sealing plug; 4 - air inlet tube; 5 - first diversion tube; 6 - first flow regulator; 7 - dropper; 8 - ventilation tube; 9 - connecting tube; 10 - second diversion tube; 11 - second flow regulator; 12 - liquid medicine filter; 13 - needle base; 14 - needle handle; 15 - puncture needle; 16 - second protective cover. Specific embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0024] The following will be combined with Figure 1 to elaborate on the present utility model in detail.

[0025] Embodiment

[0026] An infusion set with automatic air exhaust includes a dropper 7. The bottom of the dropper 7 is connected to a downwardly inclined connecting tube 9. One side of the dropper 7 is provided with a ventilation tube 8 connected to the connecting tube 9. The upper end of the ventilation tube 8 is connected to the dropper 7 and the connection part is located at the upper end of the dropper 7.

[0027] Both the connecting tube 9 and the ventilation tube 8 are rigid tubes to prevent the connection part of the connecting tube 9 and the ventilation tube 8 from deforming and collapsing, resulting in the inability to separate air from the liquid medicine.

[0028] The vent pipe 8 is arranged parallel to the axis of the dropper 7. The vent pipe 8 is kept vertical to ensure the smooth upward movement of air. When the included angle between the connecting pipe 9 and the vent pipe 8 is 45°, the separation effect of the liquid medicine and air is the best.

[0029] The upper end opening of the vent pipe 8 is arranged in a staggered manner with the upper end pipe orifice of the dropper 7 to prevent the liquid medicine at the upper end pipe orifice of the dropper 7 from dripping onto the vent pipe 8 and causing blockage of the upper end opening of the vent pipe 8, affecting the entry of the separated air into the dropper 7.

[0030] When the liquid medicine carrying air bubbles enters the connecting pipe 9 from the dropper 7, the air bubbles are forced to move downward under the action of liquid pressure until the junction of the connecting pipe 9 and the vent pipe 8. Since a small part of the liquid medicine moves upward above the vent pipe 8 here, the pressure inside the air bubbles is unbalanced. At this time, the air bubbles will burst and quickly move upward into the vent pipe 8 and then be discharged into the dropper 7 to achieve the purpose of discharging the air bubble column.

[0031] The upper end pipe orifice of the dropper 7 is connected with a first diversion pipe 5. The first diversion pipe 5 is connected with a medicine injection needle 1. A first protective cover 2 is movably sleeved on the medicine injection needle 1. Under the protection of the first protective cover 2, the medicine injection needle 1 is prevented from being contaminated. During use, the medicine injection needle 1 punctures the rubber stopper of the medicine bottle, and the liquid medicine can enter the dropper 7 through the medicine injection needle 1 and the first diversion pipe 5.

[0032] The medicine injection needle 1 is connected with an air inlet pipe 4. An air filter (not shown in the figure) is arranged in the air inlet pipe 4. A sealing plug 3 is arranged at the orifice of the air inlet pipe 4. The air inlet pipe 4 is provided to balance the pressure inside and outside the medicine bottle to facilitate the flow of the liquid medicine out of the medicine bottle. The function of the sealing plug 3 is to ensure the cleanliness of the air inlet pipe 4 and is in an open state during infusion; the air filter filters impurities in the air to prevent the impurities from contaminating the liquid medicine.

[0033] A first flow regulator 6 is arranged on the first diversion pipe 5. The first flow regulator 6 can squeeze the first diversion pipe 5 to change the cross-sectional area of the first diversion pipe 5, thereby adjusting the flow rate of the liquid medicine. When necessary, the first diversion pipe 5 can also be blocked to facilitate the replacement of a new medicine bottle.

[0034] The vent pipe 8 is connected with a second diversion pipe 10. The second diversion pipe 10 is connected with a liquid medicine filter 12. The liquid medicine filter 12 is connected with a needle seat 13. The needle seat 13 is connected with a needle handle 14 through a pipeline. A puncture needle 15 is arranged on the needle handle 14. A second protective cover 16 is movably sleeved on the puncture needle 15. The liquid medicine filter 12 further filters the liquid medicine to remove impurities and some fine air in the liquid medicine. The puncture needle 15 is used to puncture the vein of the patient. The second protective cover 16 protects the puncture needle 15 from being contaminated before use; the needle handle 14 facilitates the medical staff to firmly hold the puncture needle 15 for puncture operation.

[0035] A second flow regulator 11 is provided on the second diversion tube 10. The second flow regulator 11 has the same adjustment principle as the first flow regulator 6, and the second flow regulator 11 can adjust the flow rate of the liquid medicine in the second diversion tube 10 to meet different usage requirements.

[0036] The needle seat 13 is threadedly connected to the liquid medicine filter 12, facilitating the disassembly of the needle seat 13 and the liquid medicine filter 12.

[0037] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An infusion set with automatic exhaust, comprising a drip chamber (7), characterized in that, The bottom of the dropper (7) is connected to a communicating pipe (9) which is arranged obliquely downward. A vent pipe (8) communicating with the communicating pipe (9) is arranged on one side of the dropper (7). The upper end of the vent pipe (8) is connected to the dropper (7) and the connection part is located at the upper end of the dropper (7). Both the communicating pipe (9) and the vent pipe (8) are rigid pipes. The vent pipe (8) is arranged parallel to the axis of the dropper (7), and the included angle between the communicating pipe (9) and the vent pipe (8) is 45°.

2. The infusion set with automatic exhaust according to claim 1, wherein, The upper end opening of the vent pipe (8) is arranged in a staggered manner with the upper end pipe orifice of the dropper (7).

3. The infusion set with automatic exhaust according to claim 1, characterized in that, The upper end pipe orifice of the dropper (7) is connected to a first diversion pipe (5). The first diversion pipe (5) is connected to a medicine injection needle (1), and a first protective cover (2) is movably sleeved on the medicine injection needle (1).

4. The infusion set with automatic exhaust according to claim 3, wherein, The medicine injection needle (1) is connected to an air inlet pipe (4). An air filter is arranged in the air inlet pipe (4), and a sealing plug (3) is arranged at the pipe orifice of the air inlet pipe (4).

5. An infusion set with automatic exhaust according to claim 3, characterized in that, A first flow regulator (6) is arranged on the first diversion pipe (5).

6. The automatic exhaust infusion set according to claim 1, wherein, The vent pipe (8) is connected to a second diversion pipe (10). The second diversion pipe (10) is connected to a liquid medicine filter (12). The liquid medicine filter (12) is connected to a needle base (13). The needle base (13) is connected to a needle handle (14) through a pipeline. A puncture needle (15) is arranged on the needle handle (14), and a second protective cover (16) is movably sleeved on the puncture needle (15).

7. The automatic exhaust infusion set according to claim 6, wherein, A second flow regulator (11) is arranged on the second diversion pipe (10).

8. An automatic exhaust infusion set according to claim 6, characterized in that, The needle base (13) is in threaded connection with the liquid medicine filter (12).

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