WO2011134347A1

WO2011134347A1 - Automatic fluid shut-off infusion device with safety mechanism

Info

Publication number: WO2011134347A1
Application number: PCT/CN2011/072674
Authority: WO
Inventors: 蔡继汉
Original assignee: Cai Jihan
Priority date: 2010-04-29
Filing date: 2011-04-12
Publication date: 2011-11-03
Also published as: CN201668789U

Abstract

An automatic fluid shut-off infusion device with a safety mechanism (7) comprises a bottle piercing needle (1), a drip chamber (2), a soft tube (3), a medical fluid filter (4) and an intravenous needle (5) in a serially communicating arrangement. A flow adjuster (6) for controlling the flow is arranged peripherally around the soft tube (3). The safety mechanism (7) is arranged at the bottom of the drip chamber (2) and/or between a soft tube (3) and another soft tube (3). The safety mechanism (7) comprises a housing (71), a float (72) which is in the housing and capable of rising with the increase and lowering with the decrease of the medical fluid in the drip chamber (2), and a sealing member (73) with elasticity. The upper and the lower ends of the housing (71) are a medical fluid inlet (711) and a medical fluid outlet (712) respectively. The sealing member (73) is sheathed on the float (72). A deformable space (74) is provided between the float (72) and the sealing member (73). Because the sealing member (73) is sheathed on the float (72), the surface of the sealing member (73) is smoother, which can ensure a good sealing effect on the medical fluid outlet (712) and improve the safety and the pass rate of the safety mechanism (7).

Description

Automatic liquid infusion set with safety mechanism

Technical field

The present invention relates to an infusion device for intravenous infusion to a clinical patient in the field of medical care, and more particularly to an automatic liquid infusion device having a safety mechanism. Background technique

The infusion device includes a bottle needle, a drip bucket, a hose, a liquid medicine filter and an intravenous infusion needle which are arranged in series, wherein a flow regulator for controlling the flow is disposed in the hose jacket. In use, first insert the needle into the infusion bottle or infusion bag, the intravenous infusion needle is inserted into the patient's vein, the liquid in the infusion bottle or the infusion bag flows into the dripper along the insertion needle, and then through the hose, the liquid medicine The filter and the IV needle enter the patient; during the infusion, the flow rate can be controlled by the flow regulator.

In order to improve the safety of the infusion, a safety mechanism 7' can be installed under the dripper, so that the infusion device can automatically close the infusion line and prevent air from entering the patient when the infusion bottle and the drug solution are nearly filled. To achieve the purpose of infusion safety.

As shown in Fig. 1, the relevant safety mechanism includes a floating body 2', and a sealing membrane 3' is connected below the floating body 2', and a concave space 4' is formed between the sealing membrane 3' and the floating body 2'. During the infusion, the floating body 2' with the sealing membrane 3' rises and falls with the increase and decrease of the liquid in the safety mechanism 7', and the sealing membrane 3' of the floating body 2' when the liquid is not discharged. The drug outlet end of the safety mechanism 7' is closed, thereby blocking the air in the dripper and not entering the hose, thereby making the infusion safe.

However, in the related safety mechanism, the sealing membrane 3' is fixed to the floating body 2' by means of embedding, and the sealing membrane 3' is easily wrinkled. Therefore, a connection must be made at the liquid medicine outlet end of the safety mechanism 7'. The connecting member 718', the connecting member 718' is slightly protruded from the bottom of the safety mechanism housing. When the liquid medicine in the drip chamber is nearly finished, the floating body 2' finally falls on the connecting member 718', and the connecting member 718' will The sealing membrane 3' is lifted up toward the concave projection 4', and the sealing membrane 3' is stretched and deformed to close the inlet of the connecting member 71' so that air does not enter the hose.

That is, in the above-mentioned related safety mechanism, if the sealing film 3' has a large number of wrinkles, the gap of the wrinkles easily causes the liquid to flow in, and the sealing effect is not obtained. In addition, the concave space 4' is smaller, and when the connecting member 718' pushes up the sealing film 3', the concave space 4' may not be enough to make the sealing film stretch flat, so that the sealing film and the connecting member are sealed. The effect may not be very good, and the air may still enter the hose.

Therefore, it is necessary to provide a new type of infusion set with a safety mechanism to overcome the above drawbacks. Summary of the invention

SUMMARY OF THE INVENTION It is an object of an embodiment of the present invention to provide an automatic liquid infusion infusion device having a safety mechanism, which allows the tight body to be placed outside the floating body so that the tightness of the adhesive body is good and there is no wrinkle gap to improve the safety of the infusion.

The above object of the present invention can be achieved by the following technical solutions.

An automatic liquid infusion infusion device with a safety mechanism, comprising a bottle needle, a drip bucket, a hose, a liquid medicine filter and a venous needle arranged in sequence, wherein a flow regulation for controlling flow is arranged in the hose jacket The safety mechanism is disposed under the drip bucket and/or between the hose and the hose, wherein the safety mechanism includes a housing in which one of the housings can follow the drip chamber a floating body that rises and falls with the increase or decrease of the chemical liquid and an elastic body; the upper and lower ends of the casing are respectively a chemical liquid inlet portion and a chemical liquid outlet portion, and the dense body is sleeved outside the floating body, and the floating body and the sealing body There is a space for deformation between them.

In a preferred embodiment, the lower portion of the floating body has a downwardly extending convex body, and the upper surface of the dense body has an opening that can be sleeved outside the convex body, and the lower surface of the dense body is a sealing membrane.

In a preferred embodiment, the housing is integrally or separately provided with the dropper.

In a preferred embodiment, the housing has a connecting pipe at a position of the chemical liquid outlet portion thereof, the connecting pipe has a through hole through which the chemical liquid flows, and the upper end of the connecting pipe protrudes from the shell The bottom surface of the body; the sealing film is flat.

In a preferred embodiment, the housing has a concave surface at a position of its chemical liquid outlet portion, and the sealing film has an outwardly convex curved surface, and the curved surface cooperates with the concave surface.

In a preferred embodiment, the floating body has a gear shape, and a plurality of bumps are disposed on an outer side thereof, and the bumps are symmetrically distributed, and the floating body is vertically movable and circumferentially rotatably disposed in the casing.

In a preferred embodiment, at least one groove/bump is disposed in the housing, and at least one protrusion/groove corresponding to the groove/bump is disposed on the floating body, by means of the protrusion and the concave With the cooperation of the slots, the floating body can be embedded in the housing in a vertically movable manner.

In a preferred embodiment, the housing of the safety mechanism is made of a hard material.

In a preferred embodiment, the housing of the safety mechanism is made of a rigid plastic.

In a preferred embodiment, the end of the hose is provided with a medicinating member; the housing is provided with a sealing member having a through hole in the middle in the horizontal direction, the sealing member is located above the floating body; the top of the floating body There is a ball crown in the middle position.

The feature and advantage of the automatic liquid infusion infusion device with safety mechanism according to the embodiment of the present invention is that the tight body is The sleeve is placed on the outer surface of the float, so that the flatness of the tight body is good, so that the sealing effect of the chemical liquid outlet portion is ensured, and the safety mechanism is better and the qualification rate is higher. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments and the prior art description will be briefly described below. It is obvious that the drawings in the following description are only the present invention and Some embodiments of the prior art, for those skilled in the art, may obtain other drawings based on these drawings without any creative work.

Figure 1 is a schematic cross-sectional view of a related safety mechanism structure;

2A is a schematic structural view 1 of the infusion set with a safety mechanism of the present invention, wherein the entire infusion set is cut away;

2B is a schematic structural view 2 of the infusion set with a safety mechanism of the present invention, wherein the safety mechanism housing and the drip bucket are integrally formed;

Fig. 2C is a schematic structural view 3 of the infusion set with a safety mechanism of the present invention, wherein the safety mechanism housing is integrally formed with the drip bucket.

Fig. 2D is a schematic view showing the structure of the infusion set with the safety mechanism of the present invention, the safety mechanism being disposed between the hose and the hose.

Figure 3 is another schematic cross-sectional view showing the structure of the safety mechanism of the present invention;

Figure 3A is a schematic cross-sectional view showing the safety mechanism of the present invention and the dropper arrangement;

3B is a schematic cross-sectional view showing the integrally formed structure of the safety mechanism and the dripper of the present invention;

3C is a schematic cross-sectional view showing the structure of a conventional dripper plus safety mechanism of the present invention;

Figure 4A is a longitudinal cross-sectional view showing the first structure of the housing of the safety mechanism of the present invention;

Figure 4B is a longitudinal cross-sectional view showing a second structure of the housing of the safety mechanism of the present invention;

Figure 4C is a longitudinal cross-sectional view showing a third structure of the housing of the safety mechanism of the present invention;

Figure 5A is a schematic cross-sectional view of the housing of the safety mechanism of the present invention;

Figure 5B is a second transverse cross-sectional view of the housing of the safety mechanism of the present invention;

Figure 6A is a longitudinal sectional view of the floating body of the present invention;

Figure 6B is a longitudinal sectional view of the floating body of the present invention;

Figure 7A is a schematic cross-sectional view of the floating body of the present invention;

Figure 7B is a second transverse cross-sectional view of the floating body of the present invention; Figure 8A is a longitudinal sectional view of the adhesion body of the present invention;

Figure 8B is a longitudinal cross-sectional view of the second embodiment of the present invention;

Figure 8C is a longitudinal sectional view of the adhesion body of the present invention;

Figure 9 is a schematic cross-sectional view of the infusion set connector of the present invention having a safety mechanism;

Figure 10 is a schematic cross-sectional view of an infusion set stopper having a safety mechanism of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

As shown in FIG. 2A to FIG. 10 , an automatic liquid infusion infusion device with a safety mechanism according to an embodiment of the present invention includes a bottle insertion needle 1 , a drip bucket 2 , a hose 3 , and a liquid medicine filter 4 which are sequentially arranged through. And a venous needle 5, wherein a flow regulator 6 for controlling the flow is placed in the outer sleeve of the hose 3, and the safety mechanism 7 is arranged below the drip chamber 2 and/or between the hose 3 and the hose 3. The safety mechanism 7 includes a housing 71, a floating body 72 and an elastic body 73. The floating body 72 is located in the housing 71 and can be raised and lowered as the liquid medicine in the drip chamber increases or decreases. The upper and lower ends are respectively a chemical liquid inlet portion 711 and a chemical liquid outlet portion 712, and the adhesion body 73 is sleeved on the floating body 72, and a deformation space 74 is formed between the floating body 72 and the adhesion body 73. At the end of the exchange of the infusion bottle and/or infusion, the safety mechanism 7 prevents air from entering the hose 3, thereby preventing air from entering the patient.

In the embodiment of the present invention, the bottle insertion needle 1 is first inserted into the infusion bottle rubber stopper or the infusion bag, so that the floating body 72 is in the floating state in the casing 71. At this time, the liquid medicine in the casing 71 is discharged from the liquid medicine outlet portion 712. The patient enters the patient through the hose, and the floating body 72 decreases as the liquid medicine in the housing 71 of the safety mechanism decreases. When the liquid medicine is not dropped, the floating body 72 falls on the liquid medicine outlet portion 712. The liquid medicine outlet portion 712 is closed by the gravity of the floating body 72 and the negative pressure in the infusion tube, and the air is blocked in the safety mechanism housing 7 to enter the hose 3, thereby ensuring the safety of the infusion.

The sealing body 73 is sleeved outside the floating body 72, so that the flatness of the sealing body 73 is good, and there is no wrinkle gap, and the sealing effect is good; when the floating body 72 gradually decreases with the decrease of the liquid medicine in the housing 71, Eventually, the adhesive body 73 closes the chemical liquid outlet portion 712, and since the flatness of the adhesive body 73 is good, the sealing effect of the chemical liquid outlet portion 712 can be ensured, and the safety mechanism is better and the qualification rate is higher. .

In addition, as shown in FIG. 3A and FIG. 4A-4C, in the present embodiment, the housing 71 and the drip bucket 2 are separately disposed, and Further, as shown in FIGS. 3B and 3C, the housing 71 of the safety mechanism and the drip bucket 2 may be integrally formed, that is, the housing 71 of the safety mechanism 7 is simultaneously the housing of the drip bucket 2. However, it should be made of hard materials, and the soft materials will shrink, deform, and deform during sterilization, packaging, and transportation, so that safety effects cannot be achieved.

According to an embodiment of the present invention, as shown in FIG. 6A, 6B and FIGS. 8A-8C, the floating body 72 has a downwardly extending convex body 721 under the floating body 72, and the sealing body 73 has an opening 731 above it, and the opening 731 can The sleeve 721 is disposed outside the convex body 721 to improve the stretchability of the adhesive body 73. In particular, the size of the opening 731 can be slightly smaller than the convex body 721, so that the opening 731 needs to be opened before the sleeve 721 can be placed on the convex body 721. In this way, the stretchability of the bonded body can be further improved; and the lower side of the adhesive body 73 is the sealing film 732. When the liquid medicine is lacking in the casing 71, the buoyant body 73 and the sealing film 732 lose the buoyancy of the liquid and cooperate with the chemical liquid outlet portion 712 to close the liquid medicine outlet portion 712 to prevent air from entering the hose, thereby improving the safety of use. . Wherein, the housing 71 has a connecting tube 718 at a position of the liquid medicine outlet portion 712 thereof, and the connecting tube 718 has a through hole through which the medicine liquid flows, as shown in FIG. 4A and FIG. 8A, the connecting tube 718 The upper end may protrude from the bottom surface of the housing 71; the sealing film 732 is flat. When the planar sealing film 732 falls on the upper end of the connecting pipe 718, the connecting pipe 718 lifts the sealing film 732 toward the deformation space 74 by the gravity of the floating body 72 and the negative pressure in the connecting pipe 718. The sealing film 732 is deformed so that the flat sealing film 732 is tightly fitted to the connecting pipe 718, and the through hole of the connecting pipe 718 is closed to ensure that air does not flow into the hose 3, thereby ensuring the safety of the infusion. That is, since the flatness of the sealing film 732 is good, the sealing film 732 can be tightly fitted to the connecting pipe 718 as long as there is a little deformation space 74, so that it is safer to use.

Further, as shown in FIG. 6A, the convex body 721 of the floating body 72 may have a ring-shaped shape, and the floating body 72 has a deformation space 74 underneath, and the close-up body 73 shown in FIG. 8A is stretched over the ring-shaped convex body. Outside of 721, it is stably attached to the outside of the convex body 721 of the floating body 72 by the elastic force of the opening 731 of the adhesion body 73.

In another embodiment, as shown in Figs. 4B, 4C and Figs. 8B, 8C, the connecting tube 718 and the housing 71 are integrally formed, and the housing 71 has a concave surface at the position of the liquid chemical outlet portion 712 thereof. 714, the sealing film 732 has an outward convex arc surface, and the curved surface cooperates with the concave surface. When the curved surface type sealing film 732 is lowered and falls on the concave surface 714, the curved surface type sealing film 732 is also slightly deformed to ensure that air does not flow into the hose 3.

Further, as shown in FIG. 6B and FIGS. 8B and 8C, the convex body 721 of the floating body 72 may have a cylindrical shape, and the outer side of the cylindrical convex body 721 has a circle of concave points 722; the opening 731 of the dense body 73 The inner side has a circle of bumps 733 which are embedded in the pits 722 to stably mount the adherends 73 on the floating body 72. The sealing film 732 may be made of latex or a soft and elastic material. The flat type of sealing film 732 is as thin as possible. The thickness of the arcuate sealing film 732 is slightly thicker than that of the planar sealing film 732; the thickness of the curved sealing film 732 is such that it does not collapse when it falls on the concave surface 714. Instead, a slight deformation occurs so that the curved surface fits tightly with the concave surface.

According to an embodiment of the present invention, as shown in FIG. 7A, the floating body 72 has a gear shape, and a plurality of bumps 723 are disposed on the outer side thereof, and the bumps 723 are symmetrically distributed; at this time, as shown in FIG. 5A, the housing The inner wall of the 71 is a smooth surface, that is, without any projections and grooves; in addition, the projection 723 of the floating body 72 and the inner wall of the housing 71 may have a slight gap to allow the floating body 72 to smoothly move up and down within the housing 71. The floating body 72 is unrestricted in the circumferential direction and can be rotated in the housing 71, so that the housing 71 can accurately align the sealing film 732 at the bottom of the floating body 72 with the connecting tube 718 even when tilted, and This also enables the housing 71 to reduce manufacturing costs and reduce weight.

According to an embodiment of the present invention, at least one groove/bump is disposed in the housing 71 of the safety mechanism component, and at least one bump/groove corresponding to the groove/bump is disposed on the floating body 72. (Even if the housing 71 and the floating body 72 have a gear shape in cross section), the floating body 72 can be embedded in the housing 71 in a vertically movable manner by the cooperation of the projections and the grooves. Here, three or more gear-shaped bumps 715 may be disposed in the housing 71. The floating body 72 is provided with three or more recesses 724 corresponding to the bumps 715, and the bumps 715 are respectively embedded in the recesses 724, and the floating body and the floating body are respectively The housing may have a certain gap to facilitate liquid flow, so that the floating body 72 can only move up and down in the housing 71, and cannot rotate; the bumps 715 and 724 shown in Figs. 5B and 7B are respectively six.

According to an embodiment of the present invention, the housing 71 of the safety mechanism component may be made of a hard material, preferably a hard material having small shrinkage and stability, so that the housing does not deform, the hard The material can be hard plastic, glass steel, stainless steel, etc. The hard plastic may be transparent or opaque, such as transparent ABS, stupid, polycarbonate or the like. According to an embodiment of the present invention, the end of the hose 3 may be provided with a medicating member 31; a sealing member 716 having a through hole in the middle is disposed in the housing 71 in the horizontal direction, and the sealing member 716 is located above the floating body 72. A ball crown 725 is provided at an intermediate position of the top of the floating body 72.

When emergency dosing is required during the infusion process, the drug solution can be added from the medicated member 31. When the amount added is greater than the normal infusion amount, the pressure of the drug solution in the housing 71 below the floating body 72 is increased, when the pressure is increased. When the liquid pressure is greater than the floating body 72 in the casing 71, the floating body 72 is in close contact with the through hole of the sealing member 716 due to the upward thrust, thereby ensuring the liquid level of the floating body 72 in the drip bucket 2 Stable, when the floating body 72 in the housing 71 is The pressure in the lower chamber decreases as the liquid enters the body. When the pressure is reduced to the balance with the pressure in the dripper 2, the floating body is automatically separated from the seal 716 by the loss of thrust, and is still restored to the normal infusion state.

In addition, the seal 716 can also function as a limit to allow the float to float only below the seal 716. Therefore, in the prior art, in the prior art, the patient needs to close the infusion device during the infusion process, and the infusion set needs to be shut down first. In this embodiment, when the medicine is urgently added during the infusion process, the infusion set is not required to be closed, and the medical staff can directly inject, thereby The earth has eased the intense work of medical staff.

The above is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the invention.

Claims

Claim

1. An automatic liquid infusion infusion device with a safety mechanism, comprising a bottle needle, a drip bucket, a hose, a liquid medicine filter and a vein needle arranged in sequence, wherein a tube jacket is provided with a flow for controlling flow a flow regulator, the safety mechanism being disposed below the drip bucket and/or between the hose and the hose, wherein the safety mechanism includes a housing in which one of the housings can follow a floating body that rises and falls in the dripper to increase or decrease and an elastic body; the upper and lower ends of the casing are respectively a chemical liquid inlet portion and a chemical liquid outlet portion, and the dense body is sleeved on the outer body of the floating body There is a space for deformation between the body and the body.

2. The automatic liquid infusion set with a safety mechanism according to claim 1, wherein the floating body has a downwardly extending convex body below, and the upper surface of the dense body is sleeved outside the convex body. The opening is a sealing film below the adhesion body.

3. The automatic liquid infusion set with a safety mechanism according to claim 1, wherein the housing is integrally or separately provided with the drip chamber.

4. The automatic liquid infusion set with a safety mechanism according to claim 2, wherein the housing has a connecting pipe at a position of the chemical liquid outlet portion thereof, and the connecting pipe has a supply liquid circulation a through hole, an upper end of the connecting tube is protruded from a bottom surface of the casing; and the sealing film is flat.

5. The automatic liquid infusion set with a safety mechanism according to claim 2, wherein the housing has a concave surface at a position of the chemical liquid outlet portion thereof, and the sealing film is convex outward. The curved surface cooperates with the concave surface.

The automatic liquid-removing infusion set with a safety mechanism according to any one of claims 1 to 5, wherein the floating body has a gear shape, and a plurality of protrusions are arranged on the outer side thereof, and the convex blocks are symmetrically distributed. The floating body is movable up and down and circumferentially rotatably disposed in the housing.

The automatic liquid-repellent infusion set with a safety mechanism according to any one of claims 1 to 5, wherein at least one groove/bump is disposed in the housing, and at least one and the floating body are disposed on the floating body. The corresponding bump/groove of the groove/bump can be embedded in the casing by the cooperation of the bump and the groove.

8. An automatic liquid shut-off infusion set with a safety mechanism according to any one of claims 1-5, wherein the housing of the safety mechanism is made of a hard material.

9. An automatic liquid infusion set with a safety mechanism according to any one of claims 1-5, wherein the housing of the safety mechanism is made of a hard plastic.

10. An automatic liquid infusion set with a safety mechanism according to any one of claims 1-5, characterized in that The end of the hose is provided with a medicinating member; a sealing member having a through hole in the middle is disposed in the horizontal direction in the casing, and the sealing member is located above the floating body; and a middle portion of the top of the floating body is provided with a Ball crown.