CN205084116U - Gas -tight bubble automatic liquid -stopping filter - Google Patents

Abstract

An anti-bubble automatic anti-liquid medical solution filter and an infusion set including the filter, a filter upper cover, a filter base and a filter membrane, the filter upper cover and the filter base are connected together to form an inner cavity, The inner chamber is divided into an upper chamber and a lower chamber by a filter membrane, and a liquid inlet and a liquid outlet are respectively fixed on the filter upper cover and the filter base, and the liquid inlet is located on the filter upper cover, and is connected with the filter The upper cover is vertical, the liquid outlet is located on the filter base, and is perpendicular to the filter base, the bottom of the filter is fixed with a cylinder, and the side of the cylinder is fixed with a slender opening, and the opening communicates with the liquid outlet. Bubbles larger than the width of the opening will be blocked by the opening, and cannot enter the pipeline at the lower end of the filter with the liquid medicine, so as to truly achieve the effect of preventing air bubbles.

Description

An anti-bubble automatic liquid stop filter

technical field

The utility model relates to the technical field of medical equipment, in particular to a bubble-preventing automatic liquid-stopping filter.

Background technique

Existing medical infusion sets must be exhausted before puncturing the human body, so as to prevent air bubbles from being generated in the infusion pipeline and entering the human body with the medicinal liquid, causing adverse effects. Later, in order to reduce the operation of nursing staff and save nursing time, an automatic exhaust device was invented. The automatic exhaust device is generally arranged in the dropping funnel or the upper cavity of the liquid medicine filter. The infusion set equipped with an automatic exhaust device does not require the nursing staff to manually perform the exhaust operation, and the infusion set can automatically discharge the air bubbles in the pipeline. But the facts have proved that one of the most prone to air bubbles - in the liquid filter, even if the liquid is exhausted from the upper chamber of the liquid filter, there are still bubbles entering the lower chamber of the liquid filter, and together with the liquid Entering the human body, it cannot really achieve the effect of anti-bubble, this is one of them.

The second is that when the infusion of the existing medical infusion set is about to be finished, the liquid medicine in the infusion set will flow down. If the nursing staff does not close the infusion set in time or pull out the needle, the liquid medicine in the infusion set will flow empty. Atmospheric pressure in the infusion line after the medicinal liquid is emptied is lower than the venous pressure of the human body. At this time, the blood in the vein will enter the infusion set through the venous needle, causing blood return.

Contents of the invention

The utility model provides an anti-bubble automatic liquid stop liquid filter, which is mainly used in the existing infusion set, and solves the problem that the infusion set in the prior art cannot filter air bubbles in the filter lower chamber and cannot stop liquid automatically.

In order to achieve the above objectives, the technical solutions adopted are:

The utility model provides an anti-bubble automatic anti-liquid medicinal liquid filter, comprising a filter upper cover, a filter base and a filter membrane, the filter upper cover and the filter base are connected together to form an inner cavity, the The inner chamber is divided into an upper chamber and a lower chamber by a filter membrane. The filter upper cover and the filter base are respectively fixed with a liquid inlet and a liquid outlet. The liquid inlet is located on the filter upper cover and connected to the filter upper cover. Vertical, the liquid outlet is located on the filter base, perpendicular to the filter base, the filter base is fixed with a cylinder, the side of the cylinder is fixed with a slender opening, and the opening communicates with the liquid outlet.

The filter of the utility model is provided with the opening, and the opening communicates with the liquid outlet. When air bubbles are generated in the lower chamber of the filter, the air bubbles cannot enter the liquid outlet through the opening, and flow into the lower pipeline with the liquid medicine. It can play a real anti-bubble effect.

A filter membrane is arranged between the filter upper cover and the filter base. The filter membrane is hydrophilic and has a bubble point greater than or equal to 5kPa and less than or equal to 50kPa. After being wetted by the liquid medicine, the gas cannot pass through the membrane surface. After the liquid is transported, the pressure of the human body vein, the surface tension of the membrane and the gravity of the liquid column under the membrane surface reach a balance, and the liquid medicine will stay at the position of the filter membrane instead of continuing to flow down, achieving the function of automatic liquid stop.

As one of the specific technical proposals, the filter upper cover and the filter base are closely matched by bonding, welding or buckling.

As the third specific technical solution, the filter base also includes a circle of film release platform, and the distance between the film release platform and the bottom plane of the filter base is greater than or equal to 0.1 mm and less than or equal to 5 mm.

As the fourth specific technical solution, membrane ribs can be added on the bottom plane of the filter base.

As a fifth specific technical solution, the filter base includes at least one column.

Preferably, the depth of the valley is greater than or equal to 1mm and less than or equal to 20mm.

Preferably, the gap between the valley and the column is greater than or equal to 1mm, and less than or equal to 15mm.

Preferably, the cylinder includes at least one opening, and all openings communicate with the liquid outlet.

Preferably, the width of the opening is greater than or equal to 0.1 mm and less than or equal to 1 mm.

Since the opening is thin, air bubbles with a diameter greater than the width of the opening cannot enter the liquid outlet through the opening, and then enter the lower pipeline, thus playing the role of preventing air bubbles.

The purpose of this utility model is to also provide an infusion device, which is characterized in that it includes the anti-bubble and anti-liquid medicinal liquid filter, the upper cover of the filter is connected with the lower end of the drip bucket barrel or the conduit, and the inner cavity of the drip bucket barrel is Or the lumen of the catheter communicates directly with the lumen of the filter. The infusion set also includes conventional accessories such as a bottle stopper piercer, an infusion catheter, a flow regulator, and a venous needle, which will not be repeated here.

One of the above-mentioned infusion sets adopts a dripping funnel-filter integrated structure, and the existing infusion conduit between the dripping funnel and the filter is removed, which can effectively save costs. In addition, reducing the connection of the infusion catheter reduces the connection parts of the infusion set, which reduces the possibility of air bubbles to a certain extent.

The beneficial effects of the utility model are:

(1) When the liquid medicine in the pipeline at the upper end of the filter is empty, the gas cannot pass through the filter membrane due to the soaked liquid-stop filter membrane, and because the filter membrane has a high surface tension, it can hold the medicine liquid so that it cannot Continue to flow down to achieve the effect of automatic liquid stop. In clinical use, nurses can reasonably arrange time to pull out the needle on the patient, so as to alleviate the current situation that the needle must be pulled out immediately when the medicine liquid is empty.

(2) The special structure of the filter base can filter out air bubbles with a certain diameter, which solves the problem that the air bubbles in the lower chamber of the filter cannot be eliminated at present, and truly realizes the purpose that the medicinal liquid flowing into the patient's body does not contain harmful air bubbles.

Description of drawings

Fig. 1 is a schematic diagram of the assembly of the filter upper cover, the liquid stop type filter and the filter base of the utility model.

Fig. 2 is a sectional view of the filter base of the present invention.

Fig. 3 is a schematic structural view of the infusion set according to Embodiment 1 of the present utility model.

Fig. 4 is a schematic structural view of the upper cover of the filter according to the third embodiment of the present invention.

Fig. 5 is a schematic structural view of the infusion set according to the third embodiment of the present invention.

With reference to Fig. 1, wherein 1, filter loam cake, 2, filter membrane, 3, filter base, 13, liquid inlet.

With reference to Fig. 2, wherein 32, concave valley, 33, cylinder, 34, opening, 35, liquid outlet, 36, release film platform, 37, bottom plane

With reference to Fig. 3, wherein 41, drop funnel barrel, 42, bottle stopper puncturer, 43, infusion catheter, 44, flow regulator, 45, venous needle.

With reference to Fig. 4, wherein 51, liquid inlet.

With reference to Fig. 5, wherein 61, bottle stopper piercer, 62, drip funnel, 63, anti-bubble anti-liquid medicinal liquid filter, 64, flow regulator, 65, venous needle.

detailed description

Embodiment one:

Referring to Fig. 1 and Fig. 2, the anti-bubble and anti-liquid medical solution filter on the infusion set of the present invention comprises a filter upper cover 1, a filter base 3 and a filter membrane 2, and the filter upper cover 1 and the filter base 3 are connected Form an inner cavity together, and the inner cavity is separated into an upper chamber and a lower chamber by a filter membrane 2, and a liquid inlet 13 and a liquid outlet 35 are respectively fixed on the filter upper cover 1 and the filter base 3, and the inlet The liquid port 13 is located on the filter upper cover 1, perpendicular to the filter upper cover 1, and the liquid outlet 35 is located on the filter base 35, perpendicular to the filter base 3, and the filter base 3 is fixed with a valley 32, and the concave A cylinder 33 is fixed inside the valley 32 , and a slender opening 34 is fixed on the side of the cylinder 33 , and the opening 34 communicates with the liquid outlet 35 .

Referring to FIG. 3 , the filter upper cover 1 is directly connected with the lower end of the drip bucket barrel 41 of the infusion set, and the inner cavity of the drip bucket barrel 41 is directly connected with the inner cavity of the filter. The infusion set also includes a bottle stopper puncturer 42, an infusion catheter 43, a flow regulator 44, and a venous needle 45.

The filter upper cover 1 and the filter base 3 are closely matched by bonding, welding or buckling.

The filter base 1 also includes a circle of film release platform 36, and the distance between the film release platform 36 and the bottom plane 37 of the filter base 3 is greater than or equal to 0.1 mm and less than or equal to 5 mm.

Membrane ribs are fixed on the bottom plane 37 of the filter base 3 .

The distance between the above-mentioned membrane release platform 37 and the bottom plane 37 of the filter base 3 and the membrane support ribs provided can ensure that the filter membrane 2 will not be attached to the bottom plane 37 after being impacted by the liquid medicine, and can also ensure that the filter There is enough space between the membrane 2 and the bottom plane 37 to store the medical solution.

The filter base 1 comprises at least one valley 32 and at least one column 33 .

Preferably, the depth of the valley 32 is greater than or equal to 1mm and less than or equal to 20mm.

Preferably, the gap between the valley 32 and the column 33 is greater than or equal to 1mm, and less than or equal to 15mm.

Preferably, the cylinder 33 includes at least one opening 34 , and all the openings 34 communicate with the liquid outlet 35 .

The depth design of the valley 32 and the design of the gap between the valley 32 and the cylinder 33 have specific effects. They can ensure that the medicinal liquid has enough buffer after entering the valley, so that the opening 34 on the cylinder 33 can Better to block the air bubbles.

Preferably, the width of the opening 34 is greater than or equal to 0.1 mm and less than or equal to 1 mm.

The concave valley 32 has a certain height. After the liquid medicine flows into the lower chamber of the filter through the filter membrane 2, it has a buffering effect when flowing into the concave valley 32, and the air bubbles are easy to gather in the concave valley 32. At the same time, because the opening 34 is relatively thin, air bubbles with a diameter greater than the width of the opening 34 cannot enter the liquid outlet through the opening 34, nor can they reach the lower end pipeline of the infusion set, thus playing the role of preventing air bubbles.

Embodiment two:

The difference between this embodiment and the first embodiment is that no membrane support ribs are provided on the bottom plane 37 of the filter base 3 . The filter membrane is cut into the filter membrane 2 of suitable size, and is placed on the film platform 36, because the film platform 36 itself has a certain width, plus there is a certain distance between the film platform 36 and the bottom plane 37, Therefore, even if no stretching ribs are provided, the filter membrane 2 will not be attached to the bottom plane 37 during the infusion process, so the flow rate will not be reduced or the liquid will not be released.

Embodiment three:

As shown in Fig. 4 and Fig. 5, the difference between this embodiment and the first embodiment is that the diameter of the liquid inlet 13 is less than 7 mm, and it is connected to one end of the catheter of the infusion set, and the other end of the catheter of the infusion set is connected to the drip funnel.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present utility model, but these changes and modifications all fall within the protection scope of the present utility model.

Claims (11)

1. an Anti-bubble automatic liquid-stopping liquid medicine filter, comprise filter cover (1), filter membrane (2) and filter base (3), described filter cover (1) and filter base (3) are joined together to form an inner chamber, described inner chamber is separated into epicoele and cavity of resorption by filter membrane (2), described filter cover (1) and filter base (3) set firmly inlet (13) and liquid outlet (35) respectively, inlet (13) is positioned on filter cover (1), vertical with filter cover (1), liquid outlet (35) is positioned on filter base (3), vertical with filter base (3), described filter base (3) sets firmly trench (32), a cylinder (33) is set firmly in trench (32), cylinder (33) side sets firmly elongated open (34), opening (34) is communicated with liquid outlet (35).

2. filter according to claim 1, it is characterized in that described filter membrane (2) has hydrophilic, bubbling point is more than or equal to 5kpa, is less than or equal to 50kpa, and after being soaked by medicinal liquid, gas cannot pass through face.

3. filter according to claim 1, it is characterized in that described filter base (3) and filter cover (1) by bonding, to weld or the mode of buckle closely cooperates.

4. filter according to claim 1, it is characterized in that described filter base (3) also comprises a circle and puts film platform (36), the distance of putting between film platform (36) and filter base (3) baseplane (37) is more than or equal to 0.1mm, is less than or equal to 5mm.

5. filter according to claim 1, is characterized in that described filter base (3) baseplane (37) structure one there is support film muscle, structure two does not support film muscle.

6. filter according to claim 1, is characterized in that described filter base (3) comprises at least one trench (32) and at least one cylinder (33).

7. filter according to claim 1, is characterized in that described trench (32) is more than or equal to 1mm with the gap of cylinder (33), is less than or equal to 15mm.

8. filter according to claim 1, its feature is more than or equal to 1mm in the degree of depth of described trench (32), is less than or equal to 20mm.

9. filter according to claim 1, it is characterized in that described cylinder (33) comprises at least one opening (34), all openings (34) are all communicated with liquid outlet (35).

10. filter according to claim 1, is characterized in that described opening (34) width is more than or equal to 0.1mm, is less than or equal to 1mm.

11. 1 kinds of transfusion devices, it is characterized in that, comprise filter described in any one in claim 1-10, filter cover (1) is connected with dropping funnel bucket cylinder (41) lower end or transfusion catheter (43), dropping funnel bucket tube inner chamber or conduit cavity are directly communicated with filter inner chamber, and described transfusion device also comprises bottle plug puncture unit (42,61), transfusion catheter (43), flow regulator (44,64), intravenous needle (45,65).