RU92796U1 - DEVICE FOR THE FORMATION OF ANESTHETIC MIXTURE - Google Patents

Abstract

 A device for forming an anesthetic mixture containing a container with an anesthetic, an anesthetic dispenser connected to an evaporation chamber, a gas mixture supply channel connected to an evaporation chamber, an output channel, a gas flow measuring unit, a device control unit, characterized in that it contains two nodes gas flow formation, one of which is the oxygen flow formation unit, the gas flow measuring unit is made in the form of two gas flow sensors, each of which is connected to a respective scrap formation gas stream and a mixed gas supply passage; the anesthetic dispenser is equipped with an anesthetic presence sensor, the device control unit is connected to each of the gas flow generating units, to each of the gas flow sensors and to the anesthetic presence sensor; in this case, the device control unit is made in the form of a command unit and a controller that provides measurement of the parameters of the components of the anesthetic mixture, compares the measured values with the set values of these parameters and provides information to the formation nodes and the anesthetic dispenser.

Description

The utility model relates to medicine, in particular, to devices that cause changes in the patient’s state of consciousness and can find application in the implementation of inhalation anesthesia, which involves introducing the patient into a state of sleep and removing him from this state.

A device for the formation of an anesthetic mixture containing a container with an anesthetic, an anesthetic dispenser connected to the vaporization chamber, a gas mixture supply channel connected to the vaporization chamber, a gas mixture supply channel connected to the vaporization chamber, an output channel connected to the respiratory circuit of the device, and also a gas flow measuring unit and a device control unit [L.1].

The device for the formation of an anesthetic mixture described in [L.1] is characterized by limited functionality and the complexity of implementation, due to the need for transfusion of the anesthetic into the capacity of the evaporator and vice versa, as well as the need for an additional device for preparing the gas mixture. In addition, transfusion of the anesthetic from the vial into the container requires a break in the device and does not exclude its spill and the release of anesthetic vapor into the air and then into the lungs of medical personnel. Moreover, the device described above provides for separate control of the flow of the gas mixture and the anesthetic, which also negatively affects the formation of the anesthetic mixture.

A useful model solves the problem of creating a device for the formation of an anesthetic mixture, characterized by wide functionality, due to the ability to monitor all the components that make up the anesthetic mixture, ease of implementation, due to the ability to control using one control unit of the whole process, as well as environmental safety, due to the exclusion of Anesthetic vapor in the air.

To solve this problem, an anesthetic mixture forming device containing an anesthetic container, an anesthetic dispenser connected to an evaporation chamber, a gas mixture supply channel connected to an evaporation chamber, an output channel, a gas flow rate measuring unit, a device control unit, are proposed according to of the present invention, introduce two nodes for forming a gas stream, one of which is a node for forming an oxygen stream, and a unit for measuring a quantity is implemented as two gas stream sensors of the two gas flow sensors connected to the respective node, and forming a gas flow channel for supplying a gas mixture; provide the anesthetic dispenser with an anesthetic presence sensor; the device control unit to connect with each of the nodes of the formation of the gas flow, as well as with each; from gas flow sensors and with an anesthetic presence sensor; in this case, the device control unit is executed in the form of a command unit and a controller providing measurement of the parameters of the components of the anesthetic mixture, comparing the measured values with the set values of these parameters and providing information to the formation nodes and the anesthetic dispenser.

The inventive device for the formation of anesthetic mixture is illustrated by the example of the drawing, which shows a block diagram of this device.

A device for forming an anesthetic mixture contains a gas mixture supply channel made in the form of two nodes, the first of which is an oxygen supply node made in the form of an oxygen metering channel containing an oxygen supply line 1, a gas (oxygen) 2 formation unit and a flow sensor oxygen 3; the second node is a second gas metering unit, also made in the form of a second gas supply line 4, a gas flow forming unit 5 and a second gas flow sensor 6.

The liquid anesthetic dispenser is made in the form of an evaporation chamber 7, an anesthetic presence sensor 8, a supply line 9, an electric reversible pump 10, an anesthetic intake pipe 11 and an anesthetic container 12.

The metering channels of both gases and liquid anesthetic are connected with the output channel 13 connected to the respiratory circuit (not shown in the drawing).

The control unit of the device is made in the form of a command unit 14, the output 15 of which is connected to the controller 16, the input 17 of which is connected to the output 15 of the command unit 14. The output 18 of the controller 16 is connected to the gas flow forming unit 2 of the oxygen metering channel, and the output 19 of the controller 16 is connected with a node for forming a gas stream 5 of the dosing channel of the second gas. The input 20 of the controller 16 is connected to the gas mixture flow sensor 6, and the output 21 of the controller 16 is connected to the oxygen flow sensor 3. The controller 16 is connected to the liquid anesthetic dosing channel, in particular, the input 22 of the controller 16 is connected to the liquid anesthetic 8 sensor, and the output 23 of the controller 16 is connected to a reversible pump 10 included in the channel for dispensing a liquid anesthetic. In addition, the output 24 of the controller 16 is connected to the input 25 of the command unit 14.

The device operates as follows.

The container with anesthetic 12 is attached to the line of the fence 11 of the liquid anesthetic. From the output 15 of the command unit 14 to the input 17 of the controller 16 receives a signal about the need for anesthetic refueling. The controller 16 from the output 23 sends a signal to the reversible pump with electric drive 10 to rotate in the forward direction at maximum speed, while the anesthetic from the tank with anesthetic 12 enters the intake line 11, then to the reversible electric pump 10 and, finally, to the liquid supply line anesthetic 9. At the same time, the controller 16 checks the signal at the input 22 from the sensor for the presence of anesthetic 8. As soon as this signal shows the presence of anesthetic in the supply line, the controller 16 from output 23 sends a signal to the reversible electric pump 10 at the bus stop. The refueling device is finished, the device is ready for operation.

Information about the required composition of the binary gas mixture (percentage of oxygen), the type of anesthetic and the required concentration of its vapor comes from the output 15 of the command unit 14 to the input 17 of the controller 16. The controller 16 calculates the required flows of both gases (oxygen) and the second gas, and also the required rotation speed of the reversible electric pump 10.

Upon receipt of a signal from the output 15 of the command unit 14 to the input 17 of the controller 16 about the necessity of supplying an anesthetic respiratory mixture to the anesthesiology circuit, the controller 16 sends a signal from the output 18 to the oxygen flow formation unit 2 using the signal from the oxygen flow sensor 3 at the input 21 to adjust the value the flow of oxygen and maintaining it equal to the calculated. Similarly, the signal from the output 19 is supplied to the second gas generating unit 5, controlling the flow of the second gas, and the signal from the second gas flow sensor 6 at the input 20 is used to adjust the value of the second gas flow and keep it equal to the calculated value. At the same time, the controller 16 from the output 23 gives a signal to the reversible pump with electric drive 10 for rotation in the forward direction with the calculated speed. Liquid anesthetic along the supply line 9 enters the evaporation chamber 7 directly into the binary gas stream. Since the volume concentrations of anesthetics used during anesthesia are significantly lower than the equilibrium concentrations, the incoming anesthetic is completely evaporated and an anesthetic respiratory mixture is obtained at the outlet of the evaporation chamber of a given volume concentration of anesthetic vapor, which is supplied through the outlet pipe 13 to the anesthesiology circuit in the direction indicated by the arrow in the drawing . In the process of supplying liquid anesthetic, its presence in the supply line 9 is constantly monitored by checking at the input 22 of the controller 16 the signal from the sensor for the presence of anesthetic 8. In the event of detecting the absence of anesthetic in the supply line 9, the controller 16 outputs 24 a signal to the input 25 of the command unit 14 , which generates appropriate messages to staff. Upon receipt of a signal from the output 15 of the command unit 14 to the input 17 of the controller 16 about the need to stop the flow of the anesthetic breathing mixture into the anesthesiology circuit, the controller 16 stops supplying oxygen and a second gas with outputs 18 and 19 to the proportional valves 2 and 5, and a signal from the output 23 stops the reversing pump, thereby stopping the flow of anesthetic.

Upon completion of work from the output 15 of the command unit 14 to the input 17 of the controller 16 receives a signal about the need to drain the anesthetic. The controller 16 from the output 23 sends a signal to the reversible pump with electric drive 10 to rotate in the opposite direction at maximum speed. Anesthetic from the supply line 9 enters the reversible pump with electric drive 10, then to the intake line 11 and, finally, into the container with the anesthetic 12. After a certain period of time, the controller 16 stops the reversing pump by a signal from the output 23. The anesthetic is drained, the container with anesthetic 12 can be removed from the device.

Implementation of the claimed device for the formation of anesthetic mixture will allow:

- to simplify the process of formation of the anesthetic mixture due to the use of the vial with the anesthetic and the lack of the need to transfer the anesthetic from the vial to the evaporator tank and vice versa, which, in turn, minimizes the possibility of anesthetic spillage and its vapor entering the operating room air and, accordingly, into the lungs of medical personnel;

- increase the accuracy of the dosing of gases and anesthetic in a wide range of the flow of the mixture, and, therefore, to provide a synchronous supply of gases and anesthetic due to the control of the process of gas and anesthetic using one controller;

- use various anesthetics without replacing the structural components of the device due to the calculation of the feed rate depending on the required gas flow, a given volume concentration of anesthetic vapor and physical parameters of liquid anesthetics;

- increase the accuracy of the process control due to the use of microprocessor control of the flow of fresh anesthetic mixture, providing the anesthetic mixture only in those phases of the respiratory cycle, when necessary, which is very important when performing low-flow anesthesia (Low flow anesthesia) and, especially, minimal-flow anesthesia (Minimal flow anesthesia).

The inventive device for the formation of anesthetic mixture was developed in LLC Firm Triton-ElectronicsS (Yekaterinburg).

Literature:

1. RF patent No. 2178314, IPC A61M 16/01, 16/10, 2002

Claims (1)

A device for forming an anesthetic mixture containing a container with an anesthetic, an anesthetic dispenser connected to an evaporation chamber, a gas mixture supply channel connected to an evaporation chamber, an output channel, a gas flow measuring unit, a device control unit, characterized in that it contains two nodes gas flow formation, one of which is the oxygen flow formation unit, the gas flow measuring unit is made in the form of two gas flow sensors, each of which is connected to a respective scrap formation of gas stream and a mixed gas supply passage; the anesthetic dispenser is equipped with an anesthetic presence sensor, the device control unit is connected to each of the gas flow generating units, to each of the gas flow sensors and to the anesthetic presence sensor; in this case, the device control unit is made in the form of a command unit and a controller that provides measurement of the parameters of the components of the anesthetic mixture, compares the measured values with the set values of these parameters and provides information to the formation nodes and the anesthetic dispenser.