WO2015062324A1 - Disposable flow-stop, flow-restriction infuser and flow-stop filter - Google Patents

Abstract

A disposable flow-stop, flow-restriction infuser comprises one drip chamber (3), a bottom of the drip chamber (3) and one flow-stop filter (5) being connected to each other through an infusion tube (4). In addition, a flow-stop filter (5), the flow-stop filter (5) comprising a filter base (56), a filter cap (52) fitting the filter base (56), and an air filter film (54) sandwiched between the filter base (56) and the filter cap (52), where the filter base (56) and the air filter film (54) form an air tight cavity (53), the filter cap (52) and the air filter film (54) form a liquid tight cavity (55) below the air tight cavity (53); and a liquid inlet channel (51) connected to the air tight cavity (53) and a liquid outlet channel (57) connected to the liquid tight cavity (55) are further provided on the filter cap (52). The disposable flow-stop, flow-restriction infuser has double functions of preventing a reverse flow of blood and automatically stopping a flow, and the flow-stop filter (5) can implement automatic stop of a flow.

Description

 Single-use liquid-stop slow-flow infusion set and liquid-repellent filter This application requires a Chinese patent application on October 31, 2013

CN201310533319.6 and Chinese patent application with application date of October 31, 2013

CN201320686380.X priority. This application cites the entire text of the above-mentioned Chinese patent application. Technical field

 The present invention relates to a medical device, and more particularly to a single-use liquid-stop slow-flow infusion device and a liquid-repellent filter.

At present, in the drip infusion process for medical treatment of the body, a drip infusion device with a flow controller and a liquid stop control device is widely used.

 The invention of Application No. 201010573350. 9 discloses a liquid stopping control device for a drip infusion set. It comprises at least one liquid stopping member that can float in the dripper; and an anti-blocking structure is disposed between the liquid stopping member and the liquid inlet portion. According to the present invention, by providing an anti-clogging structure between the liquid stopping member and the liquid-receiving portion, the liquid-repellent member is prevented from being clogged into the liquid portion, resulting in a situation in which the drip liquid cannot be descended, and the operation of the medical staff is reduced. trouble. Compared with the conventional drip infusion device, it has greatly improved convenience and economic benefits in terms of operation, component manufacturing and assembly cost.

 However, the drip infusion set of this type has the following defects: After the liquid stop film is automatically stopped, a large amount of the drug solution stored in the catheter and the lower dripper will immediately stop the infusion, and the pressure in the infusion catheter will suddenly drop. At the same time, blood will flow back to the infusion catheter.

 The blood reflux is caused by the blood vessel expanding and the pressure is too large after the blood vessel has just finished filling a bottle of liquid. If the liquid film is attached to the inner wall of the bottom and the infusion is stopped immediately, the internal pressure of the infusion device is rapidly lowered, and further Blood flows from the blood vessels to the infusion set.

In order to solve the problem of blood backflow, the publication No. 202526683U discloses a single-use liquid-stop slow-flow infusion set comprising an upper dripper and a lower dripper, the bottom of which is connected to the infusion catheter, A liquid stopping device is disposed in the lower dripper, and the liquid stopping device comprises an upper floating ball, a lower floating ball and a liquid stopping film which are sequentially connected, and the liquid stopping film is matched with the bottom when working, and the inner wall of the bottom is provided with at least a groove, the groove includes an upper port and a lower port, and when the liquid-stop film is attached to the inner wall of the bottom, the liquid medicine in the lower pipette sequentially flows through the upper port and the lower port to enter the groove Infusion catheter.

 The disposable liquid-repellent slow-flow infusion device is disposed on the inner wall of the bottom of the lower dripper, and the liquid remaining in the lower dripper can be removed from the recess when the liquid-stopping film of the liquid stopping device is attached to the inner wall of the bottom liquid. The upper port of the trough enters and slowly flows into the infusion catheter from the lower port of the groove. After the drip, the air enters the replenishment, so that the liquid in the catheter continues to slowly enter the human body, prolonging the empty time of the drug droplet and preventing blood return.

 However, the infusion set of the publication No. 202526683U cannot be automatically stopped after the slow-flow infusion, so that it is easy to cause the air to be unsupervised after the completion of the liquid medicine, which poses a threat to the health of the patient.

The technical problem to be solved by the present invention is to overcome the defects that the infusion set in the prior art cannot automatically stop liquid after the slow-flow infusion, and provide a liquid-repellent filter, and also provide a single-use liquid-stopping flow. Infusion set, the infusion set not only overcomes the problem of blood return, but also has the advantages of automatic liquid stop.

 The present invention solves the above technical problems by the following technical solutions:

 A single-use liquid-stop slow-flow infusion device comprising a dripper and a liquid stopping device disposed in the dripper, the liquid stopping device comprising a liquid stopping film, the working liquid film and the liquid stopping film The inner wall of the bottom of the drip bucket is fitted, and the inner wall of the bottom is provided with at least one groove, the groove includes an upper port and a lower port, and the liquid retaining film is attached to the inner wall of the bottom, the inside of the drip bucket The liquid medicine sequentially flows through the upper port and the lower port to enter the infusion catheter, and is characterized in that the bottom of the drip chamber communicates with a liquid stopping filter through an infusion catheter.

Wherein, the dripper includes an upper drip bucket and a lower drip chamber connected to each other, and the liquid stopping device is disposed in the lower dripper, the liquid stopping device comprises an upper floating ball, a lower floating ball and the liquid stopping liquid which are sequentially connected a diaphragm, the liquid stop film is in working with the inner wall of the bottom of the lower dripper, the groove is set On the inner wall of the bottom of the lower drip bucket, the bottom of the lower drip bucket communicates with the liquid stopping filter through an infusion conduit.

 Wherein, the cross section of the groove is a polygonal surface, a curved surface or a paraboloid.

 Wherein, the upper port of the groove has a dimension in the cross-sectional direction of more than 0.1 mm, and the groove has a groove depth of more than 0.1 mm.

 Preferably, the upper port of the groove has a dimension in the cross-sectional direction greater than 0.01 mm and the groove has a groove depth greater than 0.01 mm.

 Wherein, the liquid stopping filter comprises a filter holder, a filter cover engaged with the filter holder, and a gas barrier film interposed between the filter holder and the filter cover, wherein the filter holder and The gas barrier film constitutes a gas-tight chamber, and the filter cover and the gas barrier film form a liquid-tight chamber below the gas-tight chamber; the filter cover is further provided with an inlet flow communicating with the gas-tight chamber And a flow passage that communicates with the liquid seal chamber.

 Wherein, the upper portion of the upper dropper communicates with a precision filter through a conduit.

 A single-use liquid-stop slow-flow infusion device comprising a dripper and a liquid stopping device disposed in the dripper, the liquid stopping device comprising a liquid stopping film, the working liquid film and the liquid stopping film The inner wall of the bottom of the drip bucket is fitted, and the surface of the liquid stopping film that is in contact with the inner wall is provided with at least one groove, the groove includes an upper port and a lower port, and the liquid stopping film and the bottom portion When the inner wall is fitted, the liquid medicine in the dripper sequentially flows through the upper port and the lower port to enter the infusion catheter, and the bottom of the dripper communicates with a liquid stopping filter through the infusion catheter.

 Wherein, the dripper includes an upper drip bucket and a lower drip chamber connected to each other, and the liquid stopping device is disposed in the lower dripper, the liquid stopping device comprises an upper floating ball, a lower floating ball and the liquid stopping liquid which are sequentially connected The diaphragm, the liquid stopping film works in cooperation with the inner wall of the bottom of the lower drip bucket, and the bottom of the lower drip chamber communicates with the liquid stopping filter through the infusion conduit.

 Wherein, the cross section of the groove is a polygonal surface, a curved surface or a paraboloid.

Wherein, the upper port of the groove has a dimension in the cross-sectional direction of more than 0.1 mm, and the groove has a groove depth of more than 0.1 mm. The upper port of the groove is larger than 0.1 mm, which will make the liquid flow out slowly, which can provide sufficient time to balance the internal pressure of the blood vessel to achieve better hemostasis. Preferably, the upper port of the groove has a dimension in the cross-sectional direction greater than 0.01 mm and the groove has a groove depth greater than 0.01 mm.

 Wherein, the liquid stopping filter comprises a filter holder, a filter cover engaged with the filter holder, and a gas barrier film interposed between the filter holder and the filter cover, wherein the filter holder and The gas barrier film constitutes a gas-tight chamber, and the filter cover and the gas barrier film form a liquid-tight chamber below the gas-tight chamber; the filter cover is further provided with an inlet flow communicating with the gas-tight chamber And a flow passage that communicates with the liquid seal chamber.

 Wherein, the upper portion of the upper dropper communicates with a precision filter through a conduit. The precision filter not only removes insoluble particles, but also effectively removes air from the liquid, preventing air from entering the human blood vessels with the liquid, reducing the risk of medical accidents.

 A liquid stopping filter, characterized in that the liquid stopping filter comprises a filter seat, a filter cover engaged with the filter seat and a resistance sandwiched between the filter seat and the filter cover a gas film, wherein the filter holder and the gas barrier film form a gas-tight chamber, and the filter cover and the gas barrier film form a liquid sealing chamber under the gas-tight chamber; the filter cover further has a An inlet flow passage communicating with the gas seal chamber and an outlet flow passage communicating with the liquid seal chamber.

 The positive progress of the present invention is as follows: The disposable liquid-repellent slow-flow infusion set of the present invention passes through a groove provided on the inner wall of the bottom of the lower dripper, and when the liquid-stop film of the liquid stopping device is attached to the inner wall of the bottom portion, The residual liquid in the dripper can enter from the upper port of the groove, and slowly flow from the lower port of the groove into the infusion catheter. After the drip, the air enters the supplement, so that the liquid in the catheter continues to slowly enter the human body, prolonging the empty droplet of the drug. Time, to prevent blood return, when the liquid is lowered to the liquid stop filter, the liquid stop filter can form a gas-liquid separation interface, and automatically stop the dripping.

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 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a single-use liquid-stop slow-flow infusion set in a normal infusion according to a preferred embodiment of the present invention.

2 is a structural schematic view of the disposable drip-flow infusion set of FIG. 1 at the upper and lower drip buckets during normal infusion. 3 is a schematic view showing the structure of a single-use liquid-stop slow-flow infusion device in a liquid stop according to a preferred embodiment of the present invention.

 Fig. 4 is a structural schematic view of the disposable drip-flow infusion set of the present invention at the upper and lower drip buckets during liquid stop.

 Fig. 5 is an enlarged view of a portion A in Fig. 4.

 Fig. 6 is an enlarged view of a portion B in Fig. 4.

 Figure 7 is a front elevational view of the recess of the disposable fluid-stop infusion set of the present invention.

 Fig. 8 is an enlarged view of a portion C in Fig. 7.

 Figure 9 is a front elevational view of the liquid stop filter of the present invention.

 Description of the reference signs:

 Precision filter: 1 conduit: 2

 Dripper: 3 Infusion catheter: 4

 Liquid stop filter: 5 Upper dropper: 31

 Lower drip bucket: 32 liquid stop diaphragm: 33

 Groove: 34 Upper port: 341

 Lower port: 342 inlet flow path: 51

 Filter cover: 52 Airtight chamber: 53

 Gas barrier film: 54 liquid sealed cavity: 55

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Example 1

 The structure of the single-use liquid-stop slow-flow infusion device of this embodiment is as follows:

 Please understand that the single-use liquid-stop slow-flow infusion set in this embodiment includes a precision filter 1, a catheter 2, a drip bucket 3, an infusion catheter 4 and a stop. Liquid filter 5.

The drop bucket 3 includes an upper drip bucket 31 and a lower drip bucket 32, and an upper portion of the upper drip bucket 31 passes through the conduit 2 In conjunction with the precision filter 1 (the structure of the precision filter is described in detail in the patent of the publication No. 103157154A, the entire disclosure of which is incorporated herein by reference), The upper floating ball, the lower floating ball and the liquid stopping film 33 are connected to the inner wall of the bottom of the lower drip bucket 32 when working, and the inner wall of the bottom is provided with at least one groove 34, please refer to the figure. 5-8 It is understood that the groove 34 includes an upper port 341 and a lower port 342 having a cross section larger than the cross section of the lower port 342. In actual production, the cross section of the upper port 341 and the lower portion The slow-flow effect can also be achieved by the same cross-section of the port 342. When the liquid-stop film 33 is attached to the inner wall of the bottom, the liquid medicine in the lower drip chamber 32 sequentially flows through the upper port 341 and the lower port 342. Enter the infusion catheter 4. The groove 34 has a polygonal, circular or parabolic cross section. The upper port 341 of the groove has a dimension in the cross-sectional direction of more than 0.1 mm, and the groove has a groove depth of more than 0.1 mm.

 As understood with reference to Figure 9, the liquid stop filter 5 includes a filter holder 56, a filter cover 52 that cooperates with the filter holder 56, and a filter between the filter holder 56 and the filter cover 52. The gas barrier film 54, wherein the filter holder 56 and the gas barrier film 54 form a gas-tight chamber 53, and the filter cover 52 and the gas barrier film 54 form a liquid-tight chamber 55 below the gas-tight chamber 53. The filter cover 52 is further provided with a liquid inlet flow path 51 communicating with the gas seal chamber 53 and an outlet flow path 57 communicating with the liquid seal chamber 55.

 The principle of use of the single-use liquid-stop slow-flow infusion device of this embodiment is as follows:

 For normal infusion, please understand in conjunction with Figure 1. The liquid passes through the precision filter 1, the catheter 2, the drip chamber 3, the infusion catheter 4 and the liquid stop filter 5, and outputs the drug solution at a constant flow rate.

When the liquid stopping film of the liquid stopping device is adhered to the inner wall of the bottom, the infusion set is in a slow flow infusion state, and it is understood in conjunction with FIG. 4 and FIG. 5 that the residual liquid in the lower dripper can be removed from the groove. The upper port 341 enters, and slowly flows into the infusion catheter 4 from the lower port 342 of the groove. After the drip, the air enters the supplement, so that the liquid in the catheter continues to slowly enter the human body, prolonging the empty time of the drug droplet, and the human blood vessel gradually warms up. When the liquid medicine is lowered to the liquid stop filter, the gas-liquid separation interface can be formed at the gas barrier film, and the liquid drop is automatically stopped, and the internal pressure of the blood vessel has returned to the equilibrium state at this time, so the infusion set of the embodiment can prevent blood return and The dual function of dripping is automatically stopped. The single-use liquid-stop slow-flow infusion device of the embodiment has the following technical effects: First, the dual function of preventing blood return and automatic liquid stop, the groove can extend the time of the drug droplet empty, and realize the slow-flow infusion And preventing blood return; when the liquid is lowered to the liquid stop filter, the liquid stop filter can form a gas-liquid separation interface to automatically stop the dripping.

 Secondly, the insoluble particles can be removed. The filter membrane of the precision filter has a filtration pore size of 5 to 0.2 micrometers, which can not only remove insoluble particles, but also effectively remove the air in the liquid, thereby preventing the air from entering the human blood vessel with the liquid, reducing The risk of a medical accident.

 Example 2

 The single-use liquid-stop slow-flow infusion set of this embodiment can adopt an improved structure:

 The grooves may be disposed on the liquid-stop film. Specifically, the grooves may be disposed on a surface of the liquid-stop film that is in contact with the inner wall.

 In addition, the precision filter and the liquid-repellent filter are not limited to the above specific structure, and other types of precision filters and liquid-repellent filters can also be used. In addition, precision filters can be used both up and down, as long as the precision filter is maintained. The function of filtering solid particles, the lower precision filter can realize the liquid filtration function.

 While the invention has been described with respect to the embodiments of the present invention, it is understood that the scope of the invention is defined by the appended claims. A person skilled in the art can make various changes or modifications to these embodiments without departing from the spirit and scope of the invention, and such modifications and modifications are intended to fall within the scope of the invention.

Claims

Rights request 1. A disposable liquid-stop slow-flow infusion set, which includes a dripping funnel and a liquid-stopping device arranged in the dripping funnel. The liquid-stopping device includes a liquid-stopping diaphragm. When the liquid-stopping diaphragm is working, The inner wall of the bottom of the dripping funnel is attached to the inner wall. The inner wall of the bottom is provided with at least one groove. The groove includes an upper port and a lower port. When the liquid-stop diaphragm is attached to the inner wall of the bottom, the dripping funnel The medicinal liquid inside flows through the upper port and the lower port in turn and then enters the infusion conduit. The feature is that the bottom of the drip funnel is connected to a liquid-stop filter through the infusion conduit. 2. The disposable liquid-stopping slow-flow infusion set according to claim 1, wherein the dripping hopper includes an upper dripping hopper and a lower dripping hopper that are connected to each other, and the liquid-stopping device is arranged on the lower dripping hopper. , the liquid-stopping device includes an upper floating ball, a lower floating ball and the liquid-stopping diaphragm connected in sequence. The liquid-stopping diaphragm is in contact with the inner wall of the bottom of the lower dripping funnel when working, and the groove is arranged on the lower dripping funnel. On the inner wall of the bottom of the dripping funnel, the bottom of the lower dripping funnel is interconnected with the liquid-stop filter through an infusion conduit. 3. The disposable liquid-stopping and slow-flow infusion set according to at least one of claims 1-2, characterized in that the cross-section of the groove is a polygonal surface, an arc surface or a parabolic surface. 4. The disposable liquid-stop slow-flow infusion set according to at least one of claims 1 to 3, characterized in that the size of the upper port of the groove along the cross-sectional direction is greater than 0.1 mm, and the groove of the groove is Deeper than 0.1mm. 5. The disposable liquid-stop slow-flow infusion set according to claim 4, characterized in that the size of the upper port of the groove along the cross-sectional direction is greater than 0.01 mm, and the groove depth of the groove is greater than 0.01 mm. 6. The disposable liquid-stopping slow-flow infusion set according to at least one of claims 1 to 5, characterized in that the liquid-stopping filter includes a filter seat and a filter that cooperates with the filter seat. cover and a gas barrier film sandwiched between the filter seat and the filter cover, wherein the filter seat and the gas barrier film constitute an air-sealed cavity, and below the air-sealed cavity is the filter cover and the gas-barrier film. The gas barrier film forms a liquid sealing cavity; the filter cover is also provided with a liquid inlet flow channel connected to the gas sealing cavity and a liquid inlet channel connected to the liquid sealing cavity. The liquid outlet flow channel connected with the seal cavity. 7. The disposable liquid-stopping slow-flow infusion set according to at least one of claims 1 to 6, characterized in that the upper part of the upper drip funnel is connected to a precision filter through a conduit. 8. A disposable liquid-stop slow-flow infusion set, which includes a dripping funnel and a liquid-stopping device arranged in the dripping funnel. The liquid-stopping device includes a liquid-stopping diaphragm. When the liquid-stopping diaphragm is working, Fitted with the inner wall of the bottom of the drip funnel, the liquid-stopping diaphragm is provided with at least one groove on the surface that is mutually bonded with the inner wall. The groove includes an upper port and a lower port. The liquid-stopping diaphragm is connected to the inner wall of the drip funnel. When the inner wall of the bottom is attached, the medicinal liquid in the dripping funnel flows through the upper port and the lower port in sequence and then enters the infusion conduit. It is characterized in that the bottom of the dripping funnel is connected to a liquid-stop filter through the infusion conduit. . 9. The disposable liquid-stopping slow-flow infusion set according to claim 8, wherein the dripping hopper includes an upper dripping hopper and a lower dripping hopper that are connected to each other, and the liquid-stopping device is disposed on the lower dripping hopper. In The infusion catheter and the liquid-stop filter are connected with each other. 10. The disposable liquid-stop slow-flow infusion set according to at least one of claims 8-9, characterized in that the cross-section of the groove is a polygonal surface, an arc surface or a parabolic surface. 11. The disposable liquid-stop slow-flow infusion set according to at least one of claims 8-10, characterized in that the size of the upper port of the groove along the cross-sectional direction is greater than 0.1 mm, and the groove of the groove is Deeper than 0.1mm. 12. The disposable liquid-stop slow-flow infusion set according to claim 11, wherein the size of the upper port of the groove along the cross-sectional direction is greater than 0.01 mm, and the groove depth of the groove is greater than 0.01 mm. 13. The disposable liquid-stopping slow-flow infusion set according to at least one of claims 8-12, characterized in that the liquid-stopping filter includes a filter seat and a filter that cooperates with the filter seat. cover and a gas barrier film sandwiched between the filter seat and the filter cover, wherein the filter seat and the gas barrier film form an air-sealed cavity, and below the air-sealed cavity is the filter cover and the gas-barrier film. Gas barrier film constitutes a Liquid sealing cavity; The filter cover is also provided with a liquid inlet flow channel connected to the air sealing cavity and a liquid outlet flow channel connected to the liquid sealing cavity. 14. The disposable liquid-stopping slow-flow infusion set according to at least one of claims 9-13, characterized in that the upper part of the upper drip funnel is connected to a precision filter through a conduit. 15. A liquid-stop filter, characterized in that the liquid-stop filter includes a filter seat, a filter cover matched with the filter seat, and a filter sandwiched between the filter seat and the filter cover. The gas barrier film, wherein the filter seat and the gas barrier film form an air seal cavity, and the filter cover and the gas barrier film form a liquid seal cavity below the air seal cavity; the filter cover is also provided with There is an inlet flow channel connected with the air sealing chamber and a liquid outlet flow channel connected with the liquid sealing chamber.