WO2020154905A1

WO2020154905A1 - Pneumatic standby flowmeter control system of anesthesia machine

Info

Publication number: WO2020154905A1
Application number: PCT/CN2019/073738
Authority: WO
Inventors: 蒙有作
Original assignee: 深圳市科曼医疗设备有限公司
Priority date: 2019-01-29
Filing date: 2019-01-29
Publication date: 2020-08-06

Abstract

A pneumatic standby flowmeter control system of an anesthesia machine, comprising: an oxygen source (1), a nitrous oxide source (9), and an air source (13); a standby flowmeter, respectively connected via pipes to the oxygen source (1), the nitrous oxide source (9), and the air source (13); an output interface (16), provided at an output end of the standby flowmeter and connected via a pipe to the standby flowmeter; a cylinder (6), provided on one side of the standby flowmeter; an airway component, an input end thereof being connected via a pipe to the oxygen source (1) and an output end being connected via a pipe to the cylinder (6). The airway component provides a priming effect. A telescoping motion of the cylinder (6) is controlled via the airway component, thus driving the standby flowmeter to undertake a telescoping motion, and facilitating the concealment of the standby flowmeter when not working. The flowmeter regulates the gas flow volumes of the oxygen source (1), of the nitrous oxide source (9), and of the air source (13) and provides an external anesthesia machine with a mixture of gases at corresponding proportions, thus increasing the safeness of using the anesthesia machine.

Description

Pneumatic standby flow meter control system of anesthesia machine

Technical field

The invention relates to the technical field of medical equipment, in particular to a pneumatic standby flow meter control system of an anesthesia machine.

Background technique

As a medical method, anesthesia has been increasingly recognized and used by the medical community. The air anesthesia machine is portable and suitable. It can directly use air and oxygen as the carrier gas. It can assist breathing and controlled breathing to meet various surgical requirements; its working principle is: after the patient completes anesthesia induction, the air anesthesia machine is connected to a closed type Face mask or tracheal tube connection. When inhaling, the mixed anesthetic gas enters the patient's body through the opened inhalation valve; when exhaling, the exhalation valve is opened, and the inhalation valve is closed at the same time, expelling the exhaled air. When using auxiliary or controlled breathing, a folding bellows can be used. Depress when inhaling and pull up when exhaling to ensure that the patient has sufficient ventilation. At the same time, adjust the ether switch to maintain a stable anesthesia level according to actual needs.

In the prior art, when the anesthesia machine does not have the standby flow control state, the failure of the main control flowmeter will cause the machine to fail; when the standby flowmeter of the anesthesia machine only has the oxygen state, the main control flowmeter can only use oxygen if the main control flowmeter fails. Use mixed gas; when the backup flow meter control system of the anesthesia machine is electronically controlled, failure of the power system will cause the machine to fail; therefore, the lack of a corresponding backup flow meter will affect the safety of the anesthesia machine.

Therefore, how to improve the safety of the standby flow control of the anesthesia machine has become a technical problem to be solved urgently.

Summary of the invention

The technical problem to be solved by the present invention is how to improve the safety of standby flow control of the anesthesia machine.

To this end, according to the first aspect, an embodiment of the present invention discloses a pneumatic backup flow meter control system for an anesthesia machine, including: an oxygen gas source for providing oxygen input; a laughing gas source for providing laughing gas input; Air source, used to provide air input; standby flow meter, respectively connected with oxygen source, laughing gas source and air source pipeline, used to adjust and control the gas of oxygen source, laughing gas source and air source Flow, so that the external anesthesia machine can provide the required gas flow when the main control flow meter fails; the output interface is set at the output end of the backup flow meter, and is connected to the backup flow meter pipeline to connect to the external anesthesia machine and output The gas flow of oxygen gas source, nitrous oxide gas source and air gas source are regulated by the backup flow meter; the cylinder is set on the side of the backup flow meter and is used to pneumatically control the expansion and contraction movement of the backup flow meter so that the backup flow meter does not work It is convenient to hide when the air circuit assembly, its input end is connected with the oxygen gas source pipeline, and the output end is connected with the cylinder pipeline, which is used to transmit oxygen from the oxygen source and pneumatically control the piston rod of the cylinder to expand and contract.

Optionally, it further includes: a first check valve, the input end of which is connected to the oxygen gas source pipeline, and the output end is connected to the backup flow meter pipeline, for controlling the oxygen flow direction of the oxygen gas source.

Optionally, it further includes: a second one-way valve, the input end of which is connected to the nitrous oxide gas source pipeline, and the output end is connected to the standby flow meter pipeline, for controlling the nitrous oxide gas flow direction of the laughing gas source.

Optionally, it further includes: a third one-way valve, the input end of which is connected to the air source pipeline, and the output end is connected to the backup flow meter pipeline, for controlling the air flow direction of the air source.

Optionally, it further includes: a shut-off valve, the input end of which is connected with the oxygen gas source pipeline, and the output end is connected with the backup flow meter pipeline, for shutting off the oxygen input of the oxygen gas source.

Optionally, the backup flow meter includes: an oxygen flow meter, the input end of which is connected to the oxygen gas source pipeline, and the output end is connected to the output interface pipeline for adjusting and controlling the gas flow rate of the oxygen gas source; The input end is connected with the nitrous oxide gas source pipeline, the output end is connected with the output interface pipeline, used to adjust and control the gas flow of the laughing gas source; the air flow meter, its input end is connected with the air source pipeline, and the output end is connected with The output interface pipeline connection is used to adjust and control the gas flow of the air source; among them, the oxygen flowmeter, nitrous oxide flowmeter and air flowmeter share the output end.

Optionally, the gas circuit assembly includes: a first valve, the input end of which is connected to the oxygen gas source pipeline, for controlling the oxygen input amount of the oxygen gas source; the second valve, the input end of which is connected to the oxygen gas source pipeline, Used to control the oxygen input of the oxygen source; the second valve shares the input end with the first valve; the two-position five-way valve, the input end of which is respectively connected to the output end of the first valve and the second valve, and the output end is connected with The cylinder pipeline is connected; the two-position five-way valve enters oxygen through the first valve and the second valve to achieve activation, so that the cylinder drives the backup flow meter to perform telescopic movement.

Optionally, it also includes: a restrictor valve, the input end of which is connected to the oxygen gas source pipeline, and the output end is connected to the input end pipeline of the two-position five-way valve pipeline, and is used to restrict oxygen from the oxygen gas source from entering the two-position The gas volume of the five-way valve; the restrictor valve shares the input end with the second valve.

Optionally, the first valve is a two-position three-way valve.

Optionally, the second valve is a two-position three-way valve.

The present invention has the following beneficial effects: the gas path component plays a starting role, and the telescopic movement of the cylinder is controlled by the gas path component, thereby driving the backup flow meter to perform telescoping movement, which is convenient for hiding the backup flow meter when it is not working, and regulating oxygen through the backup flow meter The gas flow of the gas source, the nitrous oxide gas source and the air gas source increases the corresponding proportion of the mixed gas to the external anesthesia machine to improve the safety of the anesthesia machine.

Description of the drawings

In order to explain the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative work.

Fig. 1 is a schematic structural diagram of a pneumatic backup flow meter control system of an anesthesia machine disclosed in this embodiment.

Reference signs: 1. Oxygen gas source; 2. First valve; 3. Second valve; 4. Flow limiting valve; 5. Two-position five-way valve; 6. Cylinder; 7. First one-way valve; 8. Oxygen flow meter; 9, nitrous oxide gas source; 10, cut-off valve; 11, second one-way valve; 12, nitrous oxide flow meter; 13, air source; 14, third one-way valve; 15, air flow meter ; 16. Output interface.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "installation", "connected" and "connected" should be interpreted broadly unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of the two components, which can be a wireless connection or a wired connection connection. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

A pneumatic standby flow meter control system for an anesthesia machine, as shown in Figure 1, includes: oxygen source 1, laughing gas source 9, air source 13, standby flow meter, output interface 16, cylinder 6 and air circuit components , Where: oxygen source 1 is used to provide oxygen input; laughing gas source 9 is used to provide laughing gas input; air source 13 is used to provide air input; spare flow meters are connected to oxygen source 1 and laughing gas source 9 respectively Connected to the air source 13 pipeline, the spare flow meter is used to adjust and control the gas flow of the oxygen source 1, the laughing gas source 9 and the air source 13, so that the external anesthesia machine can provide the necessary information when the main control flow meter fails The output interface 16 is set at the output end of the backup flow meter, and the output interface 16 is connected to the backup flow meter pipeline. The output interface 16 is used to connect to an external anesthesia machine and output the oxygen gas source regulated by the backup flow meter 1. The gas flow rate of the air source 9 and the air source 13; the cylinder 6 is arranged on one side of the standby flow meter, and the cylinder 6 is used to pneumatically control the expansion and contraction movement of the standby flow meter, so that the standby flow meter can be easily hidden when it is not working; The input end of the air circuit assembly is connected to the oxygen source 1 pipeline, and the output end of the air circuit assembly is connected to the cylinder 6 pipeline. The air circuit assembly is used to transmit oxygen from the oxygen source 1 and pneumatically control the piston rod of the cylinder 6 to expand and contract. . In a specific embodiment, the oxygen concentration of the output laughing gas mixed gas is not less than 25%.

It should be noted that when the main control flow meter fails, the gas circuit assembly plays a starting role, and the air circuit assembly controls the telescopic movement of the cylinder 6, which in turn drives the standby flow meter to expand and contract, so that the standby flow meter can be hidden when it is not working. The gas flow rate of the oxygen gas source 1, the laughing gas source 9 and the air gas source 13 is regulated by a spare flow meter, and the external anesthesia machine is increased by a corresponding proportion of mixed gas to improve the safety of the anesthesia machine.

As shown in Figure 1, it also includes: a first check valve 7, the input end of the first check valve 7 is connected to the oxygen source 1 pipeline, and the output end of the first check valve 7 is connected to the backup flow meter pipeline , The first one-way valve 7 is used to control the oxygen flow direction of the oxygen source 1.

It should be noted that the first one-way valve 7 is used to control the oxygen flow direction of the oxygen gas source 1 to prevent oxygen from returning.

As shown in Figure 1, it also includes: a second one-way valve 11, the input end of the second one-way valve 11 is connected to the laughing gas source 9 in a pipeline, and the output end of the second one-way valve 11 is connected to the standby flow meter pipeline Connected, the second one-way valve 11 is used to control the flow direction of the laughing gas source 9.

It should be noted that the second one-way valve 11 is used to control the laughing gas flow direction of the laughing gas source 9 to prevent the laughing gas from returning.

As shown in Figure 1, it also includes: a third check valve 14, the input end of the third check valve 14 is connected to the air source 13 pipeline, and the output end of the third check valve 14 is connected to the backup flow meter pipeline , The third one-way valve 14 is used to control the air flow direction of the air source 13.

It should be noted that the three-way valve is used to control the air flow direction of the air source 13 to prevent air from returning.

As shown in Figure 1, it also includes: a shut-off valve 10, the input end of the shut-off valve 10 is connected to the oxygen gas source 1 pipeline, the output end of the shut-off valve 10 is connected to the backup flow meter pipeline, the shut-off valve 10 is used to shut off the oxygen gas Source 1 oxygen input.

As shown in Figure 1, the backup flow meter includes: an oxygen flow meter 8, a nitrous oxide flow meter 12, and an air flow meter 15. The input end of the oxygen flow meter 8 is connected to the oxygen source 1 pipeline, and the output end of the oxygen flow meter 8 Connected to the output port 16 pipeline, the oxygen flow meter 8 is used to adjust and control the gas flow of the oxygen gas source 1; the input end of the nitrous oxide flow meter 12 is connected to the nitrous oxide gas source 9 pipeline, and the output end of the nitrous oxide flow meter 12 Connected to the output interface 16 pipeline, the nitrous oxide flow meter 12 is used to adjust and control the gas flow of the nitrous oxide gas source 9; the input end of the air flow meter 15 is connected to the air source 13 pipeline, and the output end of the air flow meter 15 is connected to The output interface 16 is connected with pipelines, and the air flow meter 15 is used to adjust and control the gas flow of the air source 13; wherein the oxygen flow meter 8, the nitrous oxide flow meter 12 and the air flow meter 15 share the output end.

It should be noted that the oxygen flow meter 8 is used to adjust and control the gas flow of the oxygen source 1, the nitrous oxide flow meter 12 is used to adjust and control the gas flow of the laughing gas source 9, and the air flow meter 15 is used to adjust and control the air source. The gas flow rate of 13 is convenient to increase the proportion of mixed gas for the external anesthesia machine.

As shown in Figure 1, the gas circuit assembly includes: a first valve 2, a second valve 3 and a two-position five-way valve 5. The input end of the first valve 2 is connected to the oxygen source 1 in a pipeline, and the first valve 2 is used for Control the oxygen input of the oxygen source 1; the input end of the second valve 3 is connected to the oxygen source 1 pipeline, the second valve 3 is used to control the oxygen input of the oxygen source 1, the second valve 3 and the first valve 2 Common input end; the input end of the two-position five-way valve 5 is connected to the output end of the first valve 2 and the second valve 3 respectively, and the output end of the five-position five-way valve 5 is connected to the cylinder 6 pipeline; The five-way valve 5 takes in oxygen through the first valve 2 and the second valve 3 to achieve activation, so that the cylinder 6 drives the backup flow meter to perform telescopic movement. In a specific embodiment, a flow limiting device is provided between the output end of the two-position five-way valve 5 and the cylinder 6, and the flow limiting device is used to limit the amount of oxygen entering the cylinder 6.

It should be noted that when the first valve 2 is opened, the oxygen in the oxygen source 1 passes through the first valve 2 and enters into the five-position valve 5, which in turn controls the oxygen passing through the restrictor valve 4 to enter the cylinder 6, and the cylinder 6 drives The backup flow meter is extended, and the anesthesia machine can be used by adjusting the backup flow meter; when the backup flow meter needs to be hidden, the second valve 3 is opened, and the oxygen in the oxygen source 1 passes through the second valve 3 and enters the 5/2-way valve In 5, control the exhaust of the cylinder 6 and control the oxygen to enter the cylinder 6 through the restrictor valve 4, drive the cylinder 6 to retract, and then drive the backup flow meter to move, thereby hiding the backup flow meter.

As shown in Figure 1, it also includes: a restrictor valve 4, the input end of the restrictor valve 4 is connected to the oxygen source 1 pipeline, the output end of the restrictive valve 4 and the input end of the pipeline of the five-position valve 5 The restrictor valve 4 is used to restrict the amount of oxygen from the oxygen source 1 entering the five-position valve 5, and the restrictor valve 4 and the second valve 3 share an input end.

As shown in Figure 1, the first valve 2 is a two-position three-way valve.

As shown in Figure 1, the second valve 3 is a two-position three-way valve.

Working principle: When working, open the first valve 2, the oxygen in the oxygen source 1 passes through the first valve 2 and enters the five-position valve 5, and then controls the oxygen passing through the restrictor valve 4 to enter the cylinder 6, the cylinder 6 Drive the backup flow meter to extend, and then the anesthesia machine can be used by adjusting the backup flow meter;

After working, open the second valve 3, the oxygen in the oxygen source 1 passes through the second valve 3 and enters the five-position valve 5, controls the exhaust of the cylinder 6 and controls the oxygen to enter the cylinder 6 through the restrictor valve 4, and drive The cylinder 6 retracts, and then drives the backup flow meter to move, thereby hiding the backup flow meter.

Obviously, the above-mentioned embodiments are merely examples for clear description, and are not intended to limit the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all implementation methods here. The obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims

A pneumatic standby flow meter control system for an anesthesia machine is characterized in that it comprises:

Oxygen gas source (1), used to provide oxygen input;

Nitrous oxide gas source (9), used to provide laughing gas input;

Air source (13), used to provide air input;

A spare flow meter is connected to the oxygen gas source (1), the laughing gas source (9) and the air gas source (13) pipelines respectively, and is used to adjust and control the oxygen gas source (1), The gas flow of the laughing gas source (9) and the air source (13) so that the external anesthesia machine provides the required gas flow when the main control flowmeter fails;

The output interface (16) is arranged at the output end of the backup flow meter and is connected to the backup flow meter pipeline for connecting to an external anesthesia machine and outputting the oxygen gas source (1) regulated by the backup flow meter. ), the gas flow rate of the laughing gas source (9) and the air source (13);

The air cylinder (6) is arranged on one side of the backup flow meter and is used to pneumatically control the expansion and contraction movement of the backup flow meter, so that the backup flow meter can be easily hidden when it is not working;

The gas circuit assembly, the input end of which is connected with the oxygen gas source (1) pipeline, and the output end is connected with the cylinder (6) pipeline, for transmitting oxygen from the oxygen gas source (1) and pneumatically controlling the The piston rod of the cylinder (6) performs telescopic movement.
The pneumatic backup flow meter control system of an anesthesia machine according to claim 1, characterized in that it further comprises:

The first one-way valve (7), the input end of which is connected with the oxygen gas source (1) pipeline, and the output end is connected with the backup flow meter pipeline, for controlling the oxygen of the oxygen gas source (1) Flow direction.
The pneumatic backup flow meter control system of an anesthesia machine according to claim 1, characterized in that it further comprises:

The second one-way valve (11), the input end of which is connected to the pipe of the laughing gas source (9), and the output end of which is connected to the spare flow meter pipe, for controlling the laughing gas source (9) The direction of the laughing gas flow.
The pneumatic backup flow meter control system of an anesthesia machine according to claim 1, characterized in that it further comprises:

The third one-way valve (14), the input end of which is connected with the air supply (13) pipeline, and the output end is connected with the backup flow meter pipeline, for controlling the air supply of the air supply (13) Flow direction.
The pneumatic backup flow meter control system of an anesthesia machine according to claim 1, characterized in that it further comprises:

The shutoff valve (10) has an input end connected with the oxygen gas source (1) pipeline, and an output end connected with the standby flow meter pipeline, and is used to cut off the oxygen input of the oxygen gas source (1).
The pneumatic backup flow meter control system for an anesthesia machine according to any one of claims 1-5, wherein the backup flow meter comprises:

An oxygen flow meter (8), the input end of which is connected with the oxygen gas source (1) pipeline, and the output end is connected with the output interface (16) pipeline, for regulating and controlling the oxygen gas source (1) Gas flow

A nitrous oxide flow meter (12), the input end of which is connected to the pipe of the laughing gas source (9), and the output end of which is connected to the pipe of the output interface (16), for regulating and controlling the laughing gas source ( 9) The gas flow rate;

An air flow meter (15), the input end of which is connected to the air source (13) pipeline, and the output end is connected to the output interface (16) pipeline, for regulating and controlling the air source (13) Gas flow

Wherein, the oxygen flow meter (8), the laughing gas flow meter (12) and the air flow meter (15) share an output end.
The pneumatic backup flow meter control system for an anesthesia machine according to any one of claims 1-5, wherein the air circuit assembly comprises:

The first valve (2), the input end of which is connected with the oxygen gas source (1) pipeline, and is used to control the oxygen input amount of the oxygen gas source (1);

The second valve (3), the input end of which is connected with the oxygen gas source (1) pipeline, is used to control the oxygen input amount of the oxygen gas source (1); the second valve (3) is connected to the oxygen gas source (1); The first valve (2) shares the input terminal;

A two-position five-way valve (5), the input end of which is respectively connected to the output end of the first valve (2) and the second valve (3), and the output end is connected to the cylinder (6). The two-position five-way valve (5) enters oxygen through the first valve (2) and the second valve (3) to achieve activation, so that the cylinder (6) drives the backup flow meter Telescopic movement.
The pneumatic backup flow meter control system of an anesthesia machine according to claim 7, characterized in that it further comprises:

The restrictor valve (4), whose input end is connected with the oxygen gas source (1) pipeline, and the output end is connected with the pipeline input end of the two-position five-way valve (5), for restricting the The amount of oxygen from the oxygen source (1) that enters the two-position five-way valve (5); the flow limiting valve (4) and the second valve (3) share an input end.
The pneumatic standby flow meter control system of an anesthesia machine according to claim 7, wherein the first valve (2) is a two-position three-way valve.
The pneumatic standby flow meter control system of an anesthesia machine according to claim 7, wherein the second valve (3) is a two-position three-way valve.