Dropper exhaust structure of infusion set

Abstract

A drip chamber exhaust structure of an infusion apparatus, comprising a base, a drip chamber and an exhaust cover; the base is provided with an annular groove and a sink, the sink is provided with an exhaust core, the exhaust core is provided with an exhaust hole; the top of the exhaust cover is provided with a plurality of water retaining platforms, the adjacent two water retaining platforms are outwardly inclinedly provided with a flow guide groove, the bottom of each water retaining platform is provided with a drainage strip groove, the drainage strip groove is located on the sidewall of the exhaust cover; the sidewall of the exhaust core is provided with a tension strip groove, the tension strip groove is communicated with the exhaust hole; the top of the drip chamber is connected with an upper hose through a drip tube, the exhaust core extends from the bottom of the base and is connected with a lower hose. The water retaining platform, the flow guide groove and other structures arranged on the top of the exhaust cover make the medicine flow along the given track, which can achieve more stable exhaust performance than other self-exhaust structures, and avoids exhaust failure.

Description

Technical Field

[0001] This utility model relates to the field of infusion set technology, specifically to a drip chamber venting structure for an infusion set. Background Technology

[0002] Currently, the most commonly used infusion set in clinical practice is the disposable infusion set made of polyvinyl chloride (PVC). Before use, this set requires manual inversion or squeezing of the drip chamber to expel air, introducing the medication into the drip chamber and tubing until the liquid level in the drip chamber reaches a certain height. This manual air-expelling process is not only time-consuming but also prone to error, and cannot guarantee that all air bubbles are expelled. Improper operation may lead to gas entering the patient's bloodstream, forming an air embolism, which poses a potential threat to the patient's health.

[0003] Currently, there are infusion sets with self-venting functions available for clinical use on the market. For example, patent CN201210011806.1 discloses a disposable fully automatic venting infusion set. Although the internal space of the drip chamber of this infusion set is not in direct contact with the outside air, because the top of the cap is conical, when a drop falls on the cap, the impact force of the liquid can easily cause the liquid to flow directly into the vertical groove, and from the vertical groove into the venting seat and the pipeline below the drip chamber, resulting in venting failure. At the same time, the cap is directly fitted onto the venting seat, and the bottom is flush with the bottom, so liquid can easily enter the venting seat and the pipeline below the drip chamber through the gaps, causing venting failure. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a venting structure for the drip chamber of an infusion set, so that the internal space of the drip chamber does not come into contact with the outside air, there is no risk of leakage, and the venting function is not easily disabled.

[0005] An infusion set drip chamber venting structure includes a base, a drip chamber sleeved on the base, and a venting cover, wherein the venting cover is located inside the drip chamber;

[0006] The base is provided with an annular groove and a sink groove, the sink groove is provided with an exhaust core, and the exhaust core is provided with an exhaust hole through it;

[0007] The bottom wall of the drip chamber is located in the annular groove and is in contact with the groove wall of the annular groove. The bottom outer wall of the exhaust hood is in contact with the inner wall of the settling trough. The settling trough, the outer wall of the exhaust core, and the inner wall of the exhaust hood form a receiving cavity.

[0008] The exhaust hood has multiple water baffles at the top annular edge, and a guide groove is provided outward between two adjacent water baffles. Each water baffle has a drainage strip groove at the bottom, and the drainage strip groove is located on the side wall of the exhaust hood.

[0009] The side wall of the exhaust core is provided with a tension groove, which is connected to the exhaust hole;

[0010] The top of the drip chamber is connected to the upper hose via a drip tube, and the venting core extends from the bottom of the base and is connected to the lower hose.

[0011] Furthermore, the opening of the guide channel gradually increases while the other end gradually decreases, converging to form a frustum-shaped umbrella top opposite the dropper.

[0012] Furthermore, the top of the drainage groove extends through the water-retaining platform.

[0013] Furthermore, the drainage groove and the tension groove are misaligned.

[0014] Furthermore, the width of the tension groove is 0.3mm to 0.8mm.

[0015] Furthermore, an annular hollowed-out groove is provided between the bottom of the base and the bottom of the exhaust core.

[0016] Furthermore, the dripping bucket and the exhaust hood are bonded to the base with adhesive.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] Compared to other infusion sets where the internal space of the drip chamber comes into contact with the outside air for self-venting, this invention can prevent the medicine from being contaminated by the air and the risk of leakage.

[0019] Compared to other self-venting infusion sets where the internal space of the drip chamber is not in contact with the outside air, this invention achieves more stable venting performance than other self-venting structures by setting a water baffle and a flow guide channel on the top of the venting hood, allowing the medicine to flow along a predetermined trajectory, thus avoiding venting failure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the venting structure of the drip chamber of the infusion set proposed in this utility model;

[0021] Figure 2 for Figure 1 Partial cross-sectional view of the venting structure of the drip chamber in an intravenous infusion set;

[0022] Figure 3 for Figure 2 Schematic diagram of the central exhaust hood;

[0023] Figure 4 for Figure 2 Schematic diagram of the middle base;

[0024] Figure 5 for Figure 4A cross-sectional view of the base.

[0025] Explanation of key component symbols:

[0026] 11-Base; 111-Annular groove; 112-Settling trough; 113-Exhaust core; 114-Exhaust hole; 115-Tension strip groove; 116-Cleaning groove; 12-Drip bucket; 13-Exhaust hood; 131-Water baffle; 132-Flow guide groove; 133-Drainage strip groove; 14-Drip pipe.

[0027] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0029] Please see Figures 1 to 5 An embodiment of the present invention provides a drip chamber venting structure for an infusion set, comprising a base 11, a drip chamber 12 sleeved on the base 11, and a venting cover 13, wherein the venting cover 13 is located inside the drip chamber 12;

[0030] The base 11 is provided with an annular groove 111 and a sink 112. The sink 112 is provided with an exhaust core 113 and an exhaust hole 114 is provided through the exhaust core 113.

[0031] The bottom wall of the dripping bucket 12 is located in the annular groove 111 and is in contact with the groove wall of the annular groove 111. The bottom outer wall of the exhaust hood 13 is in contact with the inner wall of the settling trough 112. The settling trough 112 forms a receiving cavity with the outer wall of the exhaust core 113 and the inner wall of the exhaust hood 13.

[0032] The exhaust hood 13 has multiple water baffles 131 at the top annular edge, and a guide groove 132 is provided outwardly between two adjacent water baffles 131. Each water baffle 132 has a drainage groove 133 at its bottom, and the drainage groove 133 is located on the side wall of the exhaust hood 13.

[0033] The side wall of the exhaust core 113 is provided with a tension groove 115, which is connected to the exhaust hole 114;

[0034] The top of the dripping chamber 12 is connected to the upper hose via a drip tube 14, and the exhaust core 113 extends from the bottom of the base 11 and is connected to the lower hose.

[0035] It should be noted that, through the function of the water baffle 131 and the flow guide 132, liquid is prevented from directly entering the drainage strip 133. By having the bottom outer wall of the exhaust hood 13 fit against the inner wall of the settling trough 112, liquid is prevented from entering the receiving cavity from between the two, thereby improving the exhaust effect.

[0036] Please see Figure 2 and Figure 3 In a preferred embodiment of this utility model, the opening of the guide channel 132 gradually increases while the other end gradually decreases, converging to form a frustum at the top of the umbrella, directly opposite the dropper 15. The frustum at the top of the umbrella and the water-blocking platform 131 are located at the highest point of the exhaust hood 13. When liquid in the dropper 15 drips onto the frustum at the top of the umbrella, the liquid will avoid the protruding water-blocking platform 131 and flow down the guide channel 132 like raindrops from the top of the exhaust hood 13, while the water-blocking platform 131 prevents the liquid from flowing into the drain groove 133.

[0037] Please see Figure 2 and Figure 3 In a preferred embodiment of this utility model, the top of the drainage groove 133 extends through the water baffle 131. At this time, the top of the drainage groove 133 serves as a demolding position, allowing the vent hood 13 to be demolded upwards during injection molding.

[0038] In a preferred embodiment of this utility model, the drainage groove 133 and the tension groove 115 are staggered, and the width of the drainage groove 133 is greater than the width of the tension groove 115. The number of drainage grooves 133 is 2 to 6.

[0039] In a preferred embodiment of this invention, the width of the tension groove 115 is 0.3mm to 0.8mm to facilitate the formation of tension upon initial contact with the liquid. The number of tension grooves 115 is 2 to 4.

[0040] Please see Figure 5 In a preferred embodiment of this utility model, an annular hollowed-out groove 116 is provided between the bottom of the base 11 and the bottom of the exhaust core 113. The hollowed-out groove 116 keeps the maximum wall thickness of the base 11 within 1.5mm, preventing shrinkage of the base 11 during injection molding.

[0041] Furthermore, the dripping bucket 12 and the exhaust hood 13 are bonded to the base 11 with adhesive to prevent leakage.

[0042] It should be noted that in this utility model, when the medicine is dripped from the dropper 15, it falls onto the umbrella top round platform, and then flows along the guide groove 132 and the outer wall of the exhaust hood 13 to the bottom of the dripping bucket 12;

[0043] After flowing to the bottom of the drip chamber 12, the liquid then flows into the receiving cavity through the drain groove 133. At this time, due to the narrow width of the tension groove 115, the liquid cannot flow into the tension groove 115 due to the liquid tension, and the liquid level will continue to rise, reaching the top of the receiving cavity. The air in the drip chamber is not affected by the tension and will continue to enter the lower tubing through the tension groove 115 and the vent hole 114 of the vent core 113 to be discharged from the infusion set.

[0044] The liquid level in the dripping funnel 12 continues to rise until it reaches the vent hole 114 at the top of the vent core 113, submerging the tension groove 115 and the vent hole 114. Once the tension groove 115 and the vent hole 114 are submerged, the air in the dripping funnel 12 can no longer escape through them. As the medicine in the dropper 15 continues to enter the dripping funnel 12, and the air in the dripping funnel 12 cannot escape, the air pressure and hydraulic pressure in the dripping funnel 12 will continue to rise. When the hydraulic pressure reaches a critical point, the medicine breaks the tension of the tension groove 115, enters the tension groove 115, and flows into the vent hole 114 of the vent core 113, entering the lower hose, expelling the air from the hose and filling the entire hose. At this point, the liquid level in the dripping funnel 12 has risen to the height of the top of the vent core 113, and the lower hose of the dripping funnel 12 is filled with liquid, completing the self-venting process.

[0045] In summary, this invention can prevent the liquid medicine from being contaminated by air and the risk of leakage; at the same time, by setting a water baffle 131 and a flow guide 132 on the top of the exhaust hood 13, this invention allows the liquid medicine to flow along a predetermined trajectory, achieving more stable exhaust performance than other self-exhausting structures and avoiding exhaust failure.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A drip chamber exhaust structure of an infusion set, characterized by comprising: Includes a base, a dripping container fitted onto the base, and an exhaust hood, the exhaust hood being located inside the dripping container; The base is provided with an annular groove and a sink groove, the sink groove is provided with an exhaust core, and the exhaust core is provided with an exhaust hole through it; The bottom wall of the drip chamber is located in the annular groove and is in contact with the groove wall of the annular groove. The bottom outer wall of the exhaust hood is in contact with the inner wall of the settling trough. The settling trough, the outer wall of the exhaust core, and the inner wall of the exhaust hood form a receiving cavity. The exhaust hood has multiple water baffles at the top annular edge, and a guide groove is provided outward between two adjacent water baffles. Each water baffle has a drainage strip groove at the bottom, and the drainage strip groove is located on the side wall of the exhaust hood. The side wall of the exhaust core is provided with a tension groove, which is connected to the exhaust hole; The top of the drip chamber is connected to the upper hose via a drip tube, and the venting core extends from the bottom of the base and is connected to the lower hose.

2. The drip chamber vent structure of the infusion set according to claim 1, wherein The opening of the guide channel gradually increases, while the other end gradually decreases, converging to form a truncated cone-shaped umbrella top opposite the dropper.

3. The drip chamber vent structure of the infusion set according to claim 1, wherein The top of the drainage groove extends through the water-retaining platform.

4. The drip chamber venting structure of the infusion set according to claim 1, characterized in that, The drainage groove and the tension groove are misaligned.

5. The drip chamber vent structure of an infusion set according to claim 1, wherein The width of the tension groove is 0.3mm to 0.8mm.

6. The drip chamber vent structure of an infusion set according to claim 1, wherein An annular hollowed-out groove is provided between the bottom of the base and the bottom of the exhaust core.

7. The drip chamber vent structure of an infusion set according to claim 1, wherein The drip chamber and the exhaust hood are glued to the base.

Images