CN108187189B

CN108187189B - Double-siphon liquid-stopping infusion apparatus for intravenous infusion

Info

Publication number: CN108187189B
Application number: CN201810021626.9A
Authority: CN
Inventors: 雷建闽; 张宏柱; 龚荣兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-01-10
Filing date: 2018-01-10
Publication date: 2020-06-02
Anticipated expiration: 2038-01-10
Also published as: CN108187189A

Abstract

The invention provides a double-siphon liquid-stopping infusion apparatus for venous transfusion, which structurally comprises a dropper interface, a funnel, an A curved tube, a movable opening, an air collecting bin, a B curved tube, an acute expanding tube, a C curved tube and an infusion tube interface; the top of the funnel is provided with a burette interface, the bottom of the funnel is provided with an A curved pipe, the A curved pipe is connected with a gas collecting bin, the bottom of the gas collecting bin is connected with a B curved pipe, the B curved pipe is connected with a C curved pipe through a sharp expansion pipe, and an outlet of the C curved pipe is provided with a transfusion pipe interface; the bottom of the gas collecting bin is provided with a movable opening. The invention has the advantages that: 1) the liquid can be automatically stopped, and manual nursing is not needed in the infusion process; 2) the structure is simple, and the manufacturing cost is low; 3) convenient application and is suitable for infusion operation under various conditions.

Description

Double-siphon liquid-stopping infusion apparatus for intravenous infusion

Technical Field

The invention relates to a double-siphon liquid-stopping infusion apparatus for venous infusion and a working method thereof, belongs to the technical field of medical instruments, and is particularly suitable for unmanned nursing infusion in field operations first aid and emergency rescue and relief rescue of army.

Background

When the liquid medicine in the medicine storage container is exhausted during intravenous infusion, if the liquid cannot be stopped in time, gas entering blood vessels of a human body through the infusion tube can generate air embolism to cause circulatory disturbance of the human body; after the blood of the patient flows back to the transfusion tube and is coagulated, if the blood is transfused into the blood vessel of the patient again, thrombus can be formed, and the life is threatened. Although there are many designs of infusion apparatus for avoiding the above-mentioned crises in the prior art, the products are rarely popularized due to high difficulty of production technology or poor technical reliability, and still cannot be manually cared during the practical operation of intravenous infusion.

Siphon is a hydrodynamic phenomenon generated by height difference (gravity) under the pushing of atmospheric pressure, and the atmospheric pressure and the gravity are necessary conditions for siphon generation; after the siphon is triggered, as long as the inflow liquid level is higher than the overflow liquid level, the liquid in the pipe is relatively full, the liquid level is pressurized in the atmosphere, the gravity of the water column at the overflow end is greater than that of the water column at the inflow end, and the siphon can be opened and maintained. The siphon will stop if one of the two conditions is missing. Therefore, the invention designs a special pipeline structure by utilizing the physical principle of siphon, thereby realizing the unattended nursing of the venous transfusion and greatly reducing the workload of medical care personnel.

Disclosure of Invention

The invention provides a liquid-stopping infusion set which is simple in structure and low in manufacturing cost, can reliably prevent gas from entering a human body and prevent blood from returning, can provide an automatic liquid-stopping function by designing a plurality of hydrodynamic configurations, and enables unmanned nursing of venous infusion to be safely realized.

The technical solution of the invention is as follows: a double siphon liquid-stopping infusion apparatus for venous transfusion comprises a dropper interface 1, a funnel 2, an A curved tube 3, a movable opening 4, an air collecting bin 5, a B curved tube 6, a sharp expanding tube 7, a C curved tube 8 and an infusion tube interface 9; the top of the funnel 2 is provided with a burette interface 1, the bottom of the funnel is provided with an A curved pipe 3, the A curved pipe is connected with a gas collecting bin 5, the bottom of the gas collecting bin 5 is connected with a B curved pipe 6, the B curved pipe 6 is connected with a C curved pipe 8 through a rapid expansion pipe 7, and an outlet of the C curved pipe 8 is provided with a transfusion pipe interface 9; the bottom of the gas collecting bin 5 is provided with a movable opening 4.

The invention has the advantages that:

1) the liquid can be automatically stopped, and manual nursing is not needed in the infusion process;

2) the structure is simple, and the manufacturing cost is low;

3) the application is convenient, and the infusion device is suitable for infusion operation under various conditions, and is particularly suitable for emergency situations under field operations.

Drawings

FIG. 1 is a schematic view of a siphon piping structure.

Fig. 2 is a schematic view of the liquid level when the siphon is opened.

Fig. 3 is a schematic view of the liquid level when the siphon is stopped.

Fig. 4 is a schematic view of the liquid level at which the siphon restarts after the break is opened.

FIG. 1 is a dropper interface; 2 is a funnel; 3 is a curved tube; 4 is a loose mouth; 5 is a gas collecting bin; 6 is a B curved tube; 7 is a sudden expansion pipe; 8 is a C-bend tube; and 9 is an infusion tube interface.

Detailed Description

As shown in fig. 1, a double siphon liquid-stopping infusion apparatus for venous transfusion comprises a dropper interface 1, a funnel 2, a curved tube A3, a movable opening 4, a gas collecting bin 5, a curved tube B6, a sharp expanding tube 7, a curved tube C8 and an infusion tube interface 9; the top of the funnel 2 is provided with a burette interface 1, the bottom of the funnel is provided with an A curved pipe 3, the A curved pipe is connected with a gas collecting bin 5, the bottom of the gas collecting bin 5 is connected with a B curved pipe 6, the B curved pipe 6 is connected with a C curved pipe 8 through a rapid expansion pipe 7, and an outlet of the C curved pipe 8 is provided with a transfusion pipe interface 9; the bottom of the gas collecting bin 5 is provided with a movable opening 4.

The upper half part of funnel 2 be cylindrical, the latter half is conical.

The part of the A curved pipe 3 extending upwards in the gas collection bin 5 is funnel-shaped, the section of the A curved pipe is gradually enlarged from bottom to top, and the A curved pipe is used for slowing down the flow rate of the liquid medicine and blocking the siphon process.

The surface of the movable opening 4 is provided with a cover which is used for opening at an interval after the transfusion is not continued so as to empty the liquid medicine in the A bent pipe 3, ensure that the liquid level of the lower siphon pipe is communicated with the atmosphere again and trigger the siphon again.

The sharp expansion pipe 7 is in an ellipsoidal shape and is used for reducing the average flow velocity of the liquid medicine and suspending the liquid medicine in the infusion tube.

The double-siphon liquid-stopping infusion apparatus for venous infusion is characterized in that a combined pipeline structure of the double-siphon liquid-stopping infusion apparatus can be divided into an upper siphon pipeline and a lower siphon pipeline, wherein the upper siphon pipeline comprises a funnel 2, an A bent pipe 3 and a gas collecting bin 5, and the lower siphon pipeline comprises a B bent pipe 6, a sharp expanding pipe 7 and a C bent pipe 8.

As shown in fig. 2-4, the working method of the double siphon liquid stop infusion apparatus for intravenous infusion comprises the following steps:

1) the pipeline structure of the infusion apparatus is divided into an upper siphon pipeline and a lower siphon pipeline, wherein the upper siphon pipeline comprises a funnel, a curve pipe A and a gas collecting bin, and the lower siphon pipeline comprises a curve pipe B, a sudden expansion pipe and a curve pipe C; when the liquid medicine is filled in the funnel and the combined pipeline below the funnel through the dropper, the liquid level of the liquid medicine in the funnel is stressed at atmospheric pressure, the descending gravity in the combined pipeline is greater than the ascending gravity, the siphon process is started, and the transfusion is started;

2) when the liquid medicine in the liquid storage container completely flows out, the liquid level of the liquid medicine in the funnel drops to the bottom of the funnel, as the flow section of an upper extension pipe of the A bent pipe in the gas collection bin is gradually enlarged, the flow speed is reduced, the upward gravity in an upper siphon pipeline exceeds the downward gravity, a flow layer at the outlet end of the A bent pipe is fractured with a flow layer at the inlet end of the B bent pipe, the siphon process of the upper siphon pipeline is stopped, the liquid medicine which stops flowing in the A bent pipe blocks the atmospheric pressure of the liquid level at the inlet of the B bent pipe, and the lower siphon pipeline loses atmospheric pressure; after the atmospheric pressure is lost, the upward gravity in the lower siphon pipeline reversely exceeds the downward gravity, and the siphon process of the lower siphon pipeline is stopped subsequently; because the flow cross section of the inflow end of the rapid expansion pipe is rapidly expanded, the on-way resistance of the liquid medicine flowing is increased, the average flow velocity of the liquid medicine is reduced, and the liquid medicine is suspended in the infusion pipe under the action of the surface tension of the liquid;

3) when the infusion is continued, the liquid level of the liquid medicine in the funnel rises and exceeds the liquid level of the outlet of the A curved tube to flow out, the liquid level of the liquid medicine at the outlet of the A curved tube is finally connected with the liquid level of the liquid medicine at the inlet of the B curved tube by the flowing liquid medicine, the ascending and descending gravity in the combined pipeline reverses at the moment, the siphoning process is triggered again, the infusion is resumed, and when the liquid medicine in the liquid storage container completely flows out, the siphoning process is stopped according to the sequence, so that the liquid medicine is suspended;

4) after the infusion is not continued, the movable opening at the bottom of the curve A pipe is opened manually at an interval, the liquid medicine in the curve A pipe is emptied, the liquid level of the liquid medicine at the inlet of the curve B pipe is communicated with the atmosphere again, the siphoning process is triggered again, and the liquid medicine in the infusion pipe is rapidly input into the veins of the human body under manual monitoring.

Examples

The invention is further illustrated by the following examples.

A double siphon liquid-stopping infusion apparatus for venous transfusion comprises a dropper interface 1, a funnel 2, an A curved tube 3, a movable opening 4, an air collecting bin 5, a B curved tube 6, a sharp expanding tube 7, a C curved tube 8 and an infusion tube interface 9; the pipeline structure comprises an upper siphon pipeline and a lower siphon pipeline which are connected in series between a dropper and a liquid conveying pipe, wherein the upper siphon pipeline consists of a funnel 2, a bent pipe A3 and a gas collecting bin 5, and the lower siphon pipeline consists of a bent pipe B6, a sharp expanding pipe 7 and a bent pipe C8; the upper siphon forms a system by itself and controls the communication and the sealing of the lower siphon and the atmosphere; the lower siphon pipe and the upper siphon pipe are linked to control the flow and the stop of the liquid medicine.

The gas collecting bin 5 is used for containing gas which possibly enters the upper siphon, the A bent pipe 3 extends into an extension pipe of the gas collecting bin 5 to rise upwards, the section of the extension pipe is gradually enlarged to reduce the flow rate of liquid medicine and release gas which possibly enters the liquid medicine, the section of an outlet of the extension pipe is downwards inclined towards one side so as to guide the liquid medicine to rotate along the arc-shaped wall at the lower part of the gas collecting bin 5 to slide upwards to the other side so as to further release the gas which possibly enters the liquid medicine; the contained gas is suspended at the upper part of the gas collection bin 5; the gas collecting bin 5 also participates in controlling the circulation and the separation of the liquid medicine in the two-stage siphon pipelines.

The movable opening 4 at the bottom of the A bent pipe 3 is used for being opened at an interval after the transfusion is not continued, so that the liquid medicine in the A bent pipe 3 is emptied, the liquid level of the lower siphon is communicated with the atmosphere again, and the siphon is triggered again.

The inlet flow cross section of the sudden expansion pipe 7 is rapidly expanded, the outlet is rapidly reduced, after the liquid medicine flows into the sudden expansion pipe 7, the on-way resistance of the liquid medicine flowing is increased due to the rapid expansion of the flow cross section in the pipe, the average flow speed is reduced, and under the action of the liquid surface tension, the flow layer at the rear end drags the flow layer at the front end, so that the flow inertia of the liquid medicine at the front end is reduced; the sharp pipe 7 can stop the flow of the liquid medicine after the lower stage siphon pipe loses the siphon condition.

When the liquid medicine is filled in the funnel and the combined pipeline below the funnel through the dropper, the liquid level of the liquid medicine in the funnel is stressed at atmospheric pressure, the descending gravity in the combined pipeline is greater than the ascending gravity, the siphon is opened, and the transfusion is started; when the liquid medicine flows out, the liquid level of the liquid medicine in the funnel drops to the bottom of the funnel. Because the flow cross section of the upper extension pipe of the A curved pipe 3 in the gas collection bin is gradually enlarged, the flow velocity is slowed down, the upward gravity of the upper siphon pipe reversely exceeds the downward gravity, the flow layer at the outlet end of the A curved pipe 3 and the flow layer at the inlet end of the curved pipe 2 are broken, and the siphon of the upper siphon pipe is stopped; the liquid medicine stopping flowing in the bent pipe 3A blocks the atmospheric pressure of the liquid level at the inlet of the bent pipe 2, so that the lower siphon pipe loses the atmospheric pressure; after the atmospheric pressure is lost, the upward gravity in the lower siphon pipe exceeds the downward gravity, and then the siphon of the lower siphon pipe is stopped; because the rapid expansion of the flow cross section of the inflow end of the rapid expansion pipe increases the on-way resistance of the liquid medicine flowing, the average flow velocity of the liquid medicine is reduced, and the liquid medicine is suspended in the infusion pipe under the action of the surface tension of the liquid.

The technical solutions adopted by the present invention are not limited to the above-mentioned embodiments, and all technical solutions formed by equivalent substitutions fall within the scope of the claims of the present invention.

Claims

1. A double siphon liquid-stopping infusion apparatus for venous infusion is characterized by comprising a dropper interface (1), a funnel (2), a curve pipe A (3), a movable opening (4), a gas collecting bin (5), a curve pipe B (6), a sudden expansion pipe (7), a curve pipe C (8) and an infusion tube interface (9); the top of the funnel (2) is provided with a burette interface (1), the bottom of the funnel is provided with an A curved tube (3), the A curved tube (3) is connected with a gas collection bin (5), the upper part of the gas collection bin (5) is provided with an extension tube, the A curved tube (3) extends into the extension tube of the gas collection bin (5) and rises upwards, the bottom of the gas collection bin (5) is connected with a B curved tube (6), the B curved tube (6) is connected with a C curved tube (8) through a sudden expansion tube (7), and the outlet of the C curved tube (8) is provided with a transfusion tube interface (9); the movable opening (4) is arranged at the bottom of the A curved pipe (3) and is positioned inside the gas collecting bin (5).

2. The double siphon stop infusion set for intravenous infusion according to claim 1, characterized in that the funnel (2) has a cylindrical upper part and a conical lower part.

3. The double-siphon liquid-stopping infusion set for intravenous infusion according to claim 1, characterized in that the part of the curved tube A (3) extending upwards inside the gas collecting bin (5) is funnel-shaped, and the cross section is gradually enlarged from bottom to top.

4. The double siphon infusion apparatus for intravenous infusion according to claim 1, characterized in that the surface of the movable port (4) is provided with a cover.

5. The double siphon liquid-stop infusion apparatus for intravenous infusion according to claim 1, characterized in that said acute expanding tube (7) is ellipsoidal.