DE102014018828B3 - Method of operating an anesthetic agent system - Google Patents

Abstract

Method for operating an anesthesia system (2) with i. an anesthesia machine (4), ii. a module (6) which can be fastened detachably to the anesthesia device (4) and has an anesthetic agent container (8), and iii. a dosing unit (10) associated with the anesthetic machine (4) or the module (6), which is designed to mix anesthetic agent of the anesthetic agent container (8) into a gas flow, iv. wherein the anesthetic agent container (8) is designed in an operating state for providing an anesthetic agent accommodated by the anesthetic agent container and in a decoupled state for detaching the module from the anesthetic device and / or for filling with anesthetic agent, v , a locking device (16) for blocking a connection between the module (6) and the anesthesia device (4) for preventing decoupling of the module (6) from the anesthesia device (4), and for unlocking a connection between the module (6) and the Anesthesia machine (4) for enabling decoupling of the module (6) from the anesthetic machine (4), and vi. a sensor (48, 56) for detecting a state-relevant measured variable of the anesthetic agent container (8), characterized by the steps: vii. Detecting a for the anesthetic agent container (8) state-relevant measure by means of the sensor (48, 56), viii. Determining the operating state or the decoupled state of the anesthetic agent container (8) by means of the measured variable, ix. Locking a connection between the module (6) and the anesthesia machine (4) when the anesthetic agent container (8) is in operating condition, and x. Unlocking the connection between the module (6) and the anesthesia machine (4) when the anesthetic agent container (8) is in the uncoupled state.

Description

The invention relates to a method for operating an anesthetic agent system comprising an anesthetic machine, a module detachably attachable to the anesthetic machine, having an anesthetic agent container, and a metering unit associated with the anesthetic machine or module adapted to mix anesthetic agent of the anesthetic agent container with a gas flow the anesthetic agent container is configured in an operating state for providing an anesthetic agent accommodated by the anesthetic agent container and in a decoupled state for detaching the module from the anesthetic device and / or for filling with anesthetic agent.

Anesthetic agent systems with an anesthetic agent device and a module detachably attached thereto, which has at least one anesthetic agent container into which the anesthetic agent can be introduced, are known from the prior art. The anesthesia machine is also called anesthesia machine. The anesthesia machine helps reduce or eliminate patient awareness during medical procedures. Furthermore, such anesthesia devices often serve to ensure the oxygenation of the patient and to allow the most painless possible implementation of surgical or diagnostic procedures. For this purpose anesthetic gas is supplied to the patient. The anesthetic gas may, for example, a fresh gas, in particular with a high proportion of oxygen, for example, at least 30 vol .-%, and a fresh gas mixed anesthetic, which is also referred to as anesthetic. Anesthetics include, for example, Halothane, Enflurane, Isoflurane, Sevoflurane or Desflurane. The patient can take the anesthetic via the lungs.

These anesthetics are also referred to as volatile anesthetics because they are mostly volatile and / or rapidly evaporating. An admixing of anesthetic from the anesthetic agent container into a gas stream can therefore take place according to the evaporation principle. In this case, the gas stream can be guided past an area with anesthetic. In addition, it is known to spray anesthetic into a gas channel through which the gas stream flows. Depending on which principle of the anesthesia system is used, different line systems may be provided to provide an anesthetic gas which is to be supplied to the patient. Common to the known anesthesia systems that an anesthetic agent container is provided, which stocks the anesthetic. The anesthetic agent may be held in the anesthetic agent container in liquid form, in liquid-gas or gaseous form. In addition, anesthetic is introduced by means of a metering unit, which is preferably designed according to the evaporation principle or according to the spraying principle, in a gas stream to be mixed with this.

Characteristic of anesthetics is their relatively high vapor pressure at room temperature. For example, an isoflurane may have a vapor pressure of about 300 mbar at 20 ° C. For example, a saturation concentration at 20 ° C. for isoflurane is 30% by volume. Since vapor pressure is temperature dependent, higher saturation concentrations may occur at higher temperatures. The saturation concentration is significantly higher than a therapeutically necessary concentration. Therefore, avoid inhaling a saturated vapor with a correspondingly high content of anesthetic directly. For the anesthetic agent container therefore at least two operating conditions are provided. On the one hand, this is the operating state of the anesthetic agent container for providing an anesthetic agent received by the anesthetic agent container. In an operation of the anesthetic agent system, the vapor saturated with anesthetic is preferably mixed with fresh gas to then be diluted appropriately for use in the patient. In this case, the desired effect occurs. The anesthetic agent provided by the anesthetic agent container is therefore provided to the dosing unit for mixing with the gas flow. When the operation or procedure of the patient is terminated, whereupon the active operation of the anesthetic agent system ends, it is most desirable to replenish the anesthetic agent container with anesthetic. It is therefore provided that the anesthetic agent container can be transferred from an operating state to a decoupled state, wherein the anesthetic agent container is designed in the uncoupling state for detaching the module from the anesthetic agent device and / or for filling with anesthetic. In the uncoupling state, the provision of the anesthetic is thus interrupted. Rather, it may be provided for the decoupling state that a, in particular releasable, fluid connection to the dosing unit, in particular by means of a valve, is closed. The valve may be, for example, a check valve.

Usually, saturation concentrations are used for the anesthetic gas provided to the patient in the range between 0.1 and 5% by volume. Due to the significantly higher saturation concentration at an ambient temperature of about 20 ° C, however, significantly higher saturation concentrations can arise for the anesthetics.

From the DE 41 06 325 A1 an anesthetic vaporiser is known in which by means of a blocking device an anesthetic agent output from the anesthetic vapor can be blocked or released. Other locking devices for anesthesia or anesthesia systems go from the DE 41 06 906 A1 and the US 2010/0269820 A1 out.

It is an object of the present invention to provide a method for safer operation of an anesthesia system.

The object is achieved by the method having the features according to claim 1. Provided for this purpose is detecting a condition relevant to the anesthetic container by means of a sensor, determining the operating state or the decoupled state of the anesthetic agent container by means of the detected measurement, blocking a connection between the module and the anesthesia machine when the anesthetic agent container is in the operating state, and unlocking the connection between the module and the anesthetic machine when the anesthetic agent container is in the uncoupled state. To lock the connection between the module and the anesthesia machine for preventing or enabling decoupling of the module from the anesthetic machine, a locking device is provided. Depending on the detected condition of the anesthetic agent container, the connection between the module and the anesthetic device is therefore blocked or unlocked. The locking can be done mechanically, electrically and / or by software. The state detection can be used as the basis for disabling or unblocking the connection between the module and the anesthesia machine. Additionally or alternatively, the particular state of the anesthetic device and / or a variable representing the blocking state can be visually and / or acoustically represented. For visual presentation, the anesthesia system, in particular the anesthesia machine, can have a corresponding display. Thus, when an operating condition for the anesthetic agent container is detected, the user may be informed and / or the connection between the module and the anesthesia machine disabled to protect the user from inadvertently disconnecting the anesthetic agent container module from the anesthesia machine Anesthesia container in an operating condition, and in particular while under pressure, is. Only when the decoupling state has been detected or determined for the anesthetic agent container, this can be optically output to inform the user that the module is now separable from the anesthesia machine. The connection is unlocked upon determining the uncoupling state so that the user can perform the decoupling of the module from the anesthesia machine. With the locking or unlocking of the explained connection, the user is thus protected from incorrect operation. The anesthesia system is therefore particularly safe.

A state variable relevant to the anesthetic agent container is understood to be a measured variable by means of which the condition of the anesthetic agent container, in particular the operating state or the uncoupling state, can be determined, in particular, predicted. Depending on the configuration of the anesthesia system and in particular of the anesthetic agent container, different sensor configurations may be provided for this purpose. Thus, a sensor can form an integral part of the anesthetic agent container and / or the module, with which the state-relevant measured variable can be detected. Alternatively or additionally, sensors can be provided at other locations of the anesthesia system, in particular for the anesthesia device, by means of which the condition of the anesthetic agent container can be determined or predicted.

The status of the anesthetic agent container is determined by means of the state-relevant measured variable. For this purpose, the measured variable can be evaluated. Such an evaluation may include, for example, a comparison of the measured variable with a threshold value. The evaluation can be done at a certain time or over a particular predetermined period. Other known evaluation algorithms, as known from the prior art, are also possible in order to determine the condition of the anesthetic agent container on the basis of the measured variable. The states of the anesthetic agent container are understood in particular to mean the operating state and the uncoupling state. Depending on the design of the anesthesia system, the anesthetic agent container can only have either one of these two states or have further states, if this is necessary.

By determining the condition of the anesthetic agent container, it is now identified whether the user can release the anesthetic agent container or module from the anesthesia machine and / or if the anesthetic agent container can be opened to replenish anesthetic agent. This is the case for both when the anesthetic agent container is in the uncoupled state. If the anesthetic agent container is in the operating state, this can also be detected according to the method according to the invention, so that the user can also be informed about this state. In operation, the user should not detach the module or anesthetic container from the anesthesia machine so as not to be unintentionally exposed to a high concentration of anesthetic. With the method according to the invention is thus the Basis, so that the user can operate the anesthesia system more safely, because now the user can be informed about the condition of the anesthetic agent container. Additional or alternative downstream actions may be performed to protect the user from unconscious misuse and the consequent consequences.

A preferred embodiment of the method is characterized in that the pressure in the anesthetic agent container and / or the temperature in the anesthetic agent container is detected as the measured variable. For this purpose, a pressure sensor or a temperature sensor may be provided which in particular forms or forms part of the anesthetic agent container and / or the module. If the pressure in the anesthetic agent container is detected, it can be determined whether the anesthetic agent container is in operation or not and possibly in the uncoupling state. If the pressure in the anesthetic agent container, for example, greater than the ambient pressure, this can be evaluated to determine the operating condition. If the pressure in the anesthetic agent container corresponds, at least substantially, to the ambient pressure, this can be used, for example, to determine the uncoupling state. Taking into account the aforementioned example, the pressure in the anesthetic agent container can therefore be compared with a threshold value, in particular the ambient pressure, in order to determine the condition, namely in particular the operating condition and / or the decoupling condition, of the anesthetic agent container. Analogous considerations, features and advantages apply if the measured quantity is the temperature in the anesthetic agent container. The temperature in the anesthetic agent container can also be meant or recorded thereof linearly dependent temperatures. For example, this may include the temperature of a wall of the anesthetic agent container, since the wall at least substantially corresponds to the temperature in the anesthetic agent container. The temperature in the anesthetic agent container may also be compared to a predetermined threshold to determine the condition of the anesthetic agent container. The pressure and / or the temperature in the anesthetic agent container have proven to be particularly effective measures in practice to determine the condition of the anesthetic agent container. In addition, sensors are known from the prior art to measure pressures and / or temperatures. This facilitates the preparation and implementation of the method according to the invention.

A further advantageous embodiment of the method is characterized in that a variable representing the gas flow, in particular its volumetric flow and / or mass flow, is detected as the measured variable. By means of the dosing unit anesthetic from the anesthetic agent container is mixed in a gas stream. This can be done, for example, by mixing several gas streams, one of the feeding gas streams comprising the vaporized anesthetic. Alternatively or additionally, the anesthetic can be injected by means of a nozzle in the gas stream. The addition of anesthetic requires, however, that the gas also flows. Only then can the anesthetic be transported in a desired concentration to the patient. Thus, if such a gas flow to the patient, this gas stream may be characterized for example by its associated flow volume and / or the associated flowing mass. In this case, the gas flow can be evaluated in such a way as to determine the condition of the anesthetic agent tank. If, therefore, a measured variable representing the gas flow is detected, the condition of the anesthetic agent reservoir can be determined. If, for example, a gas flow, this can be used to determine the operating state of the anesthetic agent tank. If no gas flow occurs, this can be used to determine the decoupling condition of the anesthetic agent tank. A measured variable characterizing the gas flow is frequently used in known anesthetic systems in order to determine, for example, the volume flow which is supplied to the patient. The use of this known signal and its evaluation for determining the condition of the anesthetic agent container can therefore be implemented particularly easily and effectively. The corresponding additional expenditure for implementing the method according to the invention is therefore comparatively small, so that the method can be used cost-effectively.

A further advantageous embodiment of the method is characterized in that a fluid flow is detected by a fluid line as the measurement signal, which is preferably designed for transport of the anesthetic from the anesthetic agent container to the metering unit. If anesthetic flows through the fluid line, the anesthesia system is in operation. If no corresponding fluid flow, in particular over a certain time, this can be regarded as a termination of operation, so that the anesthetic agent container can be decoupled. By means of the detected fluid flow through the fluid line, therefore, the condition of the anesthetic agent container can be determined. In particular, the fluid flow through the fluid line can be compared with an associated threshold value, wherein the operating state of the anesthetic agent reservoir is determined or detected when the fluid flow exceeds the threshold value. Otherwise, it can be determined or determined that the anesthetic agent container is in a decoupling state. The detection of the fluid flow can be determined by a corresponding sensor for detecting fluid flows. Such a sensor may be included, for example, by the dosing unit. Thus, the module can be made very compact. If such a fluid sensor is provided anyway for controlling the dosing unit, the method according to the invention can furthermore be implemented in a particularly favorable and simple manner.

A further advantageous embodiment of the method is characterized in that a switching position of a vent valve of the anesthetic agent container is detected. If the vent valve is open, this can be determined and / or determined based on the switching position of the vent valve. With the detection of the switching position of the vent valve can therefore be determined whether the anesthetic agent container is in the operating state, so for example when the vent valve is closed, or if the anesthetic agent container is in a decoupled state, so for example, when the vent valve is in an open position. Such an embodiment of the method according to the invention with the detection of the switching position of the vent valve has proven to be particularly safe and easy to implement in practice. If the valve is open and this is detected, this variant also represents a particularly reliable determination of the decoupling state of the anesthetic agent container.

A further advantageous embodiment of the method is characterized in that the locking device comprises a locking means, wherein the blocking means is moved to a blocking the connection between the module and the anesthetic machine position when the anesthetic agent container is in an operating condition, and the blocking means in a Connection between the module and the anesthetic machine unlocking position is moved when the anesthetic agent container is in a decoupled state. According to this embodiment, the blocking of the connection between the module and the anesthesia device takes place mechanically, namely by the said blocking means, which is movable into the corresponding blocking position. Correspondingly, the unlocking can be done by moving the locking means back to unlock or release the connection. Alternatively or additionally, other locks may be provided to lock or unlock the connection between the module and the anesthetic machine, such as an electromagnetic lock.

A further advantageous embodiment of the method is characterized in that the anesthetic agent container is transferred with a lowering of the associated internal pressure of an operating pressure to an ambient pressure of the operating state in the uncoupling state. This applies in particular when the dosing unit is designed to spray the anesthetic agent into a gas stream by means of a nozzle of the dosing unit. For in this case, the anesthetic agent can be pressurized so that the anesthetic, preferably through a fluid line, passes to the nozzle to then be sprayed into the gas stream. In principle, however, the anesthetic agent container can also be pressurized for other variants of the dosing unit, in particular in order to influence the evaporation properties of the anesthetic agent. If the pressure in the anesthetic agent container in the operating state is greater than in the uncoupling state, a pressure sensor may be provided which detects the pressure in the anesthetic agent container as a measured variable in order to determine the condition of the anesthetic agent container on the basis of the pressure or the corresponding measured variable. This then makes it possible to implement the advantages of the invention.

A further advantageous embodiment of the method is characterized in that an admixing of anesthetic by means of the dosing unit is blocked in the decoupled state of the anesthetic agent container. This prevents the user from starting to meter anesthetic into the gas stream when the anesthetic container is in a disconnect state. This prevents in the uncoupling state that the anesthetic agent container, for example, is subjected to a higher internal pressure and / or that a gas flow is directed into the anesthetic agent container. Blocking therefore increases the safety of the operation of the anesthesia system. Because the user is now more likely not exposed to the risk of inadvertently inhaling the anesthetic, especially in a higher concentration.

A further advantageous embodiment of the method is characterized in that the anesthesia device has a module receptacle for receiving the module, wherein a filling opening of the anesthetic agent container is blocked with a recording of the module in the module receptacle. If the module is inserted into the module receptacle, the module receptacle blocks the filling opening of the anesthetic agent container. The blocking can be done by means of positive locking and / or adhesion. Consequently, the user can not inadvertently open the filling opening to check the filling state and / or to refill anesthetic. Rather, the user is now encouraged to first check whether the anesthetic agent container is in a decoupled state. In particular, the module can only be in the uncoupled state of the Disconnect the anesthetic agent device. In the uncoupling state, the anesthetic agent container is ready for removal, maintenance and / or replenishment since, for example, the anesthetic agent container is not flowed through by a gas flow and / or is under pressure. In particular, if the connection between the module and the anesthesia machine is locked in an operating state of the anesthetic agent container, the user can not inadvertently open the filling opening. Because this is prevented by the module recording, in which the module, and thus also the anesthetic agent container, is used. Such an embodiment of the method, in particular with the combination of design features of the anesthetic device or the module holder, increases the safety in the application of the anesthetic system.

A further advantageous embodiment of the method is characterized in that the filling opening of the anesthetic agent container is released with a removal of the module from the module receiving. If the anesthetic agent container is in the uncoupled state, the user can take the module with the anesthetic agent container out of the module receiver, in particular since the connection between the module and the anesthetic machine is unlocked. A blockage of the filling opening is therefore also canceled. The user may fill the anesthetic agent container when it is in a decoupled state. In this case, at least no highly concentrated vapors escape in an amount that damages the user. Thus, the handling of the anesthesia system according to the invention is safe and easy.

A further advantageous embodiment of the method is characterized in that the anesthetic agent container has a filling opening with an opening closure and a locking device is provided for the opening closure, wherein the opening closure is locked by means of the locking device when the anesthetic agent container is in an operating condition, and the opening closure means the locking device is unlocked when the anesthetic agent container is in a decoupled state. Thus, a separate or associated locking device can be provided for the opening closure. This can be designed separately from the previously described locking device. Alternatively or additionally, locking device and locking device may be integrally formed so that the blocking of the connection between the module and the anesthesia device as well as the locking of the opening closure by a common device. The same applies to the unlocking or unlocking. Preferably, however, the locking device and the locking device are formed separately from each other. The locking device may thus preferably be associated with the module. Thus, different modules can be connected to the anesthetic machine, wherein the opening closure, which is formed differently from module to module and each of an associated locking device can be locked. This increases the possibility of variation for the design of the anesthetic agent system.

A further advantageous embodiment of the method is characterized in that the anesthesia system has a Öffnungsverschlussprüfeinheit, wherein a recording of the module of the module receptacle is permitted by means of the locking device, if by means of the Öffnungsverschlussprüfeinheit a correct fit of the opening closure of the module is detected, and a recording of the Module is prevented by the module receiving means of the locking device, if by means of the Öffnungsverschlussprüfeinheit an incorrect fit of the opening closure of the module or a lack of the opening closure is detected. This embodiment is based on the idea to prevent the inclusion of the module and, where appropriate, the transfer of the module from the uncoupling state to the operating state when the opening closure is missing or the opening closure is not seated correctly, so that there is a risk that from the filling anesthetic or a gas stream emerges with an increased concentration of anesthetic. This is possible, for example, in that the anesthetic agent container is pressurized, although the opening closure is not correctly seated on the filling opening. In this case, a side stream with an increased concentration of anesthetic could escape from the fill port. However, this is to be prevented. The opening check unit is used to detect the correct seat of the opening lock on the module or at the associated filling opening. The anesthetic agent container can therefore be pressurized according to operation. Therefore, it is also possible without increased risk to insert the module in the module holder, so that the module is received by the module holder. Then, the operating condition of the anesthetic agent container can be determined. If the anesthetic agent container is in the operating state, the anesthetic agent container can be pressurized, for example, without resulting in increased danger for the user of the anesthetic agent system.

The invention will be described below without limiting the general inventive idea by means of embodiments with reference to the drawings. In the drawings show:

1 a schematic representation of the anesthesia system in a first embodiment,

2 a schematic representation of the anesthesia system in a second embodiment,

3 a schematic representation of the anesthesia system in a third embodiment,

4 a schematic representation of the anesthesia system in a fourth embodiment,

5 a schematic representation of the anesthesia system in a fifth embodiment,

6 a schematic representation of the anesthesia system in a sixth embodiment,

7 a detail of a perspective view of a first embodiment of an opening closure,

8th a perspective view of the opening closure 7 with a partially withdrawn from the module receiving module,

9 a schematic cross-sectional view of a second embodiment of an opening closure,

10 a schematic cross-sectional view of the opening closure 9 with a partially withdrawn from the module receiving module,

11 a section of a schematic cross-sectional view of the anesthesia system with a locked module, and

12 a the cross-sectional view 11 with an unlocked module.

From the 1 is a schematic representation of a first embodiment of the anesthesia system 2 to recognize. The anesthesia system 2 has an anesthesia machine 4 and a module 6 on. The module 6 is detachable on the anesthesia machine 4 attached. This is indicated by the anesthetic machine 4 a module recording 20 on. With the insertion of the module 6 in the module holder 20 forms between the module 6 and the module holder 20 a detachable connection. This connection can be, for example, a snap connection or a latching connection.

The module 6 has an anesthetic agent container 8th on, which is designed for storage of anesthetic. The anesthetic container 8th is therefore also known as anesthesia tank. In the illustrated embodiment, the module is also a metering unit 10 assigned. The dosing unit 10 Used for mixing anesthetic into a gas stream. For this purpose, the dosing unit 10 a gas channel, in the anesthetic from the anesthetic agent tank 8th is sprayed. So that the anesthetic can be taken up by the gas stream and transported away, is a gas flow line 30 and a gas flow discharge 32 provided, each with one end with the dosing unit 10 are connected. The gas flow line 30 leads from the anesthetic agent device 4 to the module 6 and then to the dosing unit 10 , At the transition from the module 6 to the module holder 20 can the gas flow supply 30 have a detachable connection. From the dosing unit 10 leads the gas flow discharge 32 to the outer wall of the module 6 and then to the anesthesia machine 4 , In this case, the gas flow discharge 30 at the transition from the module 6 to the module holder 20 a detachable connection.

The anesthetic from the anesthetic container 8th passes through a fluid line 12 to the dosing unit 10 , To a corresponding volume flow and / or mass flow of anesthetic through the fluid line 12 and then to the nozzle 46 the dosing chamber 10 it has been proven in practice, the Anesthesiemittelbehälter 8th to put under pressure. To achieve this, is between the anesthesia machine 4 and the anesthetic container 8th a pressure line 34 provided, wherein the pressure in the pressure line by means of a pressure valve 36 is controllable. The pressure valve 36 is by means of a control unit 38 of the anesthetist 4 controllable. To inject the anesthetic from the anesthetic reservoir 8th To finish, the pressure in the anesthetic tank can 8th by means of a pressure relief valve 42 and one between the anesthetic reservoir 8th and the pressure relief valve 42 extending pressure relief line 40 be lowered. The pressure relief valve 42 is by means of the control unit 38 controllable.

The dosing unit 10 is an injector 44 assigned, the injection valve 44 by means of the fluid line 12 with the anesthetic container 8th connected is. Is the injector 44 opened, anesthetic from the anesthetic agent tank 8th through the fluid line 12 and the injection valve 44 to the injector 46 , By means of the injector 46 The anesthetic is injected into the gas stream to mix anesthetic agent with the gas stream. The injection valve 44 is by means of a communication line with the control unit 38 connected. The communication line is at the junction between the module 6 and the module holder 20 detachably designed. In addition, a is the injection valve 44 assigned pressure sensor 48 provided to the pressure at the entrance of the injector 44 and / or at the outlet of the injector 44 to investigate. Thus, the pressure sensor 48 also the dosing unit 10 be assigned. Alternatively or additionally, the pressure sensor 48 the anesthetic container 8th be assigned. In this case, the pressure sensor 48 alternatively or additionally be configured to the pressure in the Anästhesiemittelbehälter 8th to investigate. A corresponding pressure can be achieved by means of the previous embodiment of the pressure sensor 48 also be determined when the pressure at the inlet of the injector 44 is determined. The pressure sensor 48 is by means of a communication line with the control unit 38 connected. This communication line is at the junction of the module 6 to the module holder 20 detachably designed.

Around the anesthetic agent tank 8th to fill with the desired anesthetic, has the anesthetic agent container 8th a filling opening 22 on. The anesthetic is often a liquid passing through the filling port 22 into the anesthetic container 8th can flow. Due to the high volatility of anesthetic and the often strong anesthetic effect, it is necessary that the filling opening 22 is closable. This is an opening closure 24 provided, the filling opening 22 can close.

Taking into account the previous explanations and with a view to the 1 can the module 6 in addition to the anesthetic agent container 8th So have a variety of other elements and / or units. The dosing unit has already been mentioned 10 and the line connections or communication connections. In addition, the filling opening 22 and the opening closure 24 , which is preferably designed as a lid, the module 6 assigned.

Due to the closeability of the filling opening 22 can the module 6 from the module holder 20 taken out to the module 6 then to fill, to wait and / or by another module 6 to replace.

Previously, it was explained that the anesthetic agent tank 8th , in particular by means of the pressure valve 36 and between the pressure valve 36 and the anesthetic container 8th trained pressure line 34 , is pressurizable. To prevent the module 6 from the module holder 20 is removed by the user when the anesthetic agent container 8th is under pressure, first is the pressure in the anesthetic agent tank 8th to lower. This is the pressure relief valve 42 to open and the pressure valve 36 close. Both are done by a corresponding control by means of the control unit 38 , To pass through the control unit 38 generating corresponding control signals is for the anesthesia machine 4 a communication unit 50 intended. The communication unit 50 may comprise an optical output unit, for example a display, and an input unit, for example keys. The input unit and the output unit can also be designed combined, for example by a touch screen. By means of the communication unit 50 can send commands to the control unit 38 be sent and / or information from the control unit 38 being represented. This is the communication unit 50 by means of a communication line with the control unit 38 connected.

Was by the user via the communication unit 50 made an input that causes the pressure in the anesthetic agent container 8th if it has been lowered so that this is harmless to the user, then the module 6 from the module holder 20 be removed safely. By lowering the pressure in the anesthetic agent tank 8th Thus, the condition of the anesthetic agent container changes 8th , Is the anesthetic agent tank 8th under a high pressure, in particular under an operating pressure, so is the condition of the anesthetic agent tank 8th an operating condition. Will the pressure in the anesthetic agent tank 8th lowered from the operating pressure to a lower pressure, for example to ambient pressure, so is the condition of the anesthetic agent tank 8th a decoupled state. Because in the uncoupling state, the user can the module 6 at least essentially safe from the module holder 20 separate. To the user a safe handling of the anesthesia system 2 It is provided that at least one state-relevant measured variable of the anesthetic agent container 8th is detected. So can by means of the pressure sensor 48 the pressure of the anesthetic agent container 8th be recorded. A corresponding signal is then sent to the control unit 38 forwarded to the evaluation of the measured variable, here for example the pressure in the anesthetic agent container 8th , is trained. The control unit 38 For example, the measured variable is compared with a threshold value, in particular the ambient pressure. Is the pressure in the anesthetic agent tank 8th greater, for example, 10% greater than the ambient pressure, this will preferably continue as an operating condition of the anesthetic agent container 8th certainly. Is the pressure in the anesthetic agent tank 8th At most 10% greater than the ambient pressure, this is considered a decoupling condition of the anesthetic agent container 8th scored. The condition of the anesthetic agent container 8th can by means of the communication unit 50 , in particular by means of an associated optical output unit, are output. The user is then informed about the condition of the anesthetic agent container 8th so whether the anesthetic container 8th in the uncoupling state or in the operating state. Is the anesthetic agent tank 8th in the operating state, the user is encouraged to use the module 6 not from the module holder 20 refer to.

Should the user be the optically dispensed condition of the anesthetic agent container 8th accidentally disregarded and / or should the condition of the anesthetic agent container 8th can not be optically output, it may still be desirable to place the user in front of the pressurized anesthetic agent container 8th to protect. It is therefore intended that the anesthesia machine 4 a locking device 16 having. The locking device 16 is used to block a connection between the module 6 and the anesthesia machine 4 , For this purpose, the locking device 16 a blocking agent 18 that in a the connection between the module 6 and the anesthesia machine 4 locking position is movable when the anesthetic agent container 8th is in an operating state. In the operating state, the connection between the module 6 and the anesthesia machine 4 so locked. If the pressure in the anesthetic agent tank 8th is largely lowered, takes place a state transition from the operating state to the decoupled state. This can be done by means of the evaluation of the pressure in the anesthetic agent container 8th respectively. Is the anesthetic agent tank 8th in the uncoupling state, the blocking means becomes 18 in a the connection between the module 6 and the anesthesia machine 4 unlocking position moves. In other words, the connection between the module 6 and the anesthesia machine 4 unlocked when the anesthetic agent tank 8th in a decoupled state. The user can use the module 6 now from the module recording 20 without being exposed to a higher risk.

For a particularly advantageous development of the anesthetic system 2 it has proved to be advantageous if the filling opening 22 to an outside of the anesthetic device 4 or the module 6 is aligned. Thus, the filling opening 22 from an outside of the module 6 be made accessible without the module 6 from the anesthesia machine 4 to separate. Now add anesthetic into the anesthetic container 8th fill in, would be the opening closure 24 to move, in particular to remove and / or fold over to access the filling opening 22 to obtain. Under an opening of the filling opening 22 Therefore, the aforementioned movement of the opening closure 24 Understood. With the opening of the filling opening 22 However, a fluid, in particular a gas or a liquid, from the anesthetic agent container 8th escape. This is particularly likely when the anesthetic agent container 8th under pressure. To protect the user from such leakage of fluid is the anesthesia system 2 as it is in 1 is shown with a locking device 26 Mistake. In principle, the locking device 26 analogous to the locking device 16 be educated. The locking device 26 So is with a communication link with the control unit 38 connected. The control unit 38 controls the locking device 26 to the opening closure 24 to lock or release. For this purpose, the locking device 26 a locking means 52 be associated with the opening closure 24 can be locked or unlocked. Again 1 it can be seen, the locking device 26 the anesthesia machine 4 be assigned, so that a mechanical attachment and the communication link to the control unit 38 for an anesthesia system 2 is only once to train. The blocking agent 18 and / or the locking means 52 is or are preferably formed as a mechanical latch, which in corresponding recesses, in particular grooves of the module 6 or the opening closure 24 can surround. In the operating state, that is, for example when using the pressure sensor 48 and the control unit 38 it is determined that a corresponding operating pressure in the anesthetic agent container 8th prevails, the port closure 24 by means of the locking device 26 and the associated locking means 52 locks, allowing the user to open the shutter 24 not accidentally from the filling opening 22 disconnect or the opening closure 24 can move such that a fluid unintentionally from the filling 22 exit. The user can use the module 6 beyond that in the detected operating state not from the module recording 20 remove as the locking device 16 with the associated blocking means 18 a removal of the module 6 prevented. By means of the locking device 16 and the locking device 26 Therefore, the user is effectively against an unwanted operating error of the anesthesia system 2 protected, so that the anesthesia system according to the invention 2 is especially safe.

In the 2 is a schematic representation of the anesthesia system 2 to recognize in a second embodiment. In this case, the second embodiment of the anesthetic system corresponds 2 as far as possible the first embodiment of the anesthesia system 2 out 1 , The second embodiment of the anesthesia system 2 differs at least substantially by the design of the locking device 16 and the locking device 26 and the respective associated blocking means 18 or locking means 52 , Because for the second embodiment of the anesthesia system 2 form the locking device 16 and the locking device 26 an integral unit. The same applies to the blocking agent 18 and the locking means 52 , which also form an integral part. Thus, the module 6 and the opening closure 24 be locked or locked together and unlocked or unlocked in the opposite direction. This facilitates the construction of a corresponding actuator. So can the locking device 16 and the locking device 26 one having common actuator, the mechanical with the integral structure of blocking means 18 and locking means 52 is connected, which allows a parallel displacement, when the aforementioned two means are each formed as a bar.

Analogous to the first embodiment as to 1 it is described for the anesthesia system 2 out 2 also provided that initially the anesthetic agent container 8th should be brought into a decoupled state before the module 6 from the module holder 20 is removable and / or before the filling opening 22 accessible to the user. The drain to the anesthetic agent tank 8th To fill with anesthetic, therefore, could be designed as follows.

In a first step, by means of the communication unit 50 preferably comprising an input unit, generating a communication signal corresponding to the user's desire to terminate a dosing operation and / or the anesthetic agent container 8th in a decoupled state. For this purpose, the user can, for example, a button of the communication unit 50 or a touch screen of the communication unit 50 Press on the anesthesia machine 4 is attached. The communication unit 50 sends the aforementioned signal to the control unit 38 ,

Provided the aforementioned signal from the communication unit 50 sent out and / or from the control unit 38 received in a second step, the interruption of the dosage by means of the dosing unit 10 , If the dosage has already been interrupted, the interruption is maintained. If the dosing unit 10 an injection valve 44 includes or a corresponding valve 44 the dosing unit 10 is assigned, for example, the spraying of anesthetic is interrupted. If the dosing unit 10 works by means of the evaporation principle, the supply of a gas flow through the gas stream supply line 30 interrupted. For interrupting the injection of anesthetic by means of the injector 44 For example, the pressure valve 36 getting closed.

In a third step, the pressure in the anesthetic agent container 8th lowered to about ambient pressure, provided the pressure in the anesthetic agent tank 8th previously was greater than the ambient pressure. This may be the vent valve 14 be opened. The closure of the pressure valve 36 and / or the opening of the vent valve 14 can by means of appropriate signals from the control unit 38 respectively.

In a fourth step, the detection of one for the anesthetic agent container takes place 8th state-relevant measured variable. This can be, for example, the internal pressure of the anesthetic agent container 8th be. For this purpose, preferably the pressure sensor 48 educated. This can, for example, the internal pressure of the anesthetic agent container 8th measure directly. A corresponding signal is sent to the control unit 38 transmitted. Alternatively or additionally, the gas stream through the gas stream supply line 30 be recorded as state-relevant measure. For this purpose, a corresponding sensor may be provided, which sends a corresponding signal to the control unit 38 transmitted. As a further alternative or supplementary state-relevant measured variable, the switching position of the venting valve 14 be used. Will the switching position of the vent valve 14 measured, so this can be a state-relevant measure for the anesthetic agent container 8th be recorded. Is the bleeder valve 14 opened, it can be concluded that the anesthetic agent container 8th is vented. Is the bleeder valve 14 closed, it can then be assumed that the anesthetic agent container 8th under pressure. Stands the anesthetic agent container 8th under pressure, this is considered as operating condition. Is the anesthetic agent tank 8th vented, this can be interpreted as a decoupled state.

In a fifth step, the determination of the condition of the anesthetic agent container then takes place 8th by means of the acquired measurand. If, for example, the previously described switching position of the vent valve 14 the condition-relevant measure, the condition of the anesthetic agent container 8th , Thus, the operating state or the decoupled state, as previously explained. Alternatively or additionally, for example, the pressure in the anesthetic agent container can be used as the operationally relevant measured variable 8th used to determine the condition of the anesthetic agent container 8th to determine. Is the pressure in the anesthetic agent tank 8th about the ambient pressure, so is the anesthetic agent tank 8th in the decoupled state. Is the pressure in the anesthetic agent tank 8th greater than the ambient pressure, is the anesthetic agent tank 8th in the operating state. Analogous considerations for other measurands can apply accordingly. The determination is usually carried out by means of comparison with an associated threshold value and a logical evaluation.

In a sixth step, the maintenance of a blocking or the release of a blockage of the module takes place 6 opposite the anesthesia machine 4 ,

In the fifth step, the operating state of the anesthetic agent container 8th determined, so remains a connection between the module 6 and the anesthetic agent device 4 blocked. The position of the blocking means 18 so it is not changed. On the other hand, in the previous step, the decoupling condition of the anesthetic agent container became 8th determines, the unblocking of the connection between the module takes place 6 and the anesthetic agent device 4 , The same can complement or alternatively for the locking of the opening closure 24 be valid.

Is the connection between the module 6 and the anesthesia machine 4 or the associated module holder 20 unlocked and / or the opening closure 24 unlocked, so then the module 6 from the module holder 20 be removed and / or the opening closure 24 be moved away or removed to anesthetic through the filling opening 22 into the anesthetic container 8th to give. The anesthetic container 8th So it can then be replenished. The filling of the anesthetic agent container 8th is particularly safe, since this is in a non-critical state, or is in the decoupled state.

The process described above thus provides a particularly safe filling and removal of the module from the user's point of view 6 and / or the anesthetic agent container 8th represents.

From the 3 is a third embodiment of the anesthesia system 2 to take in a schematic representation. Where appropriate, reference is made to the previous explanations of the first embodiment and the second embodiment. The third embodiment of the anesthesia system 2 differs at least essentially in that the module 6 no ice spray valve 44 assigned. From the anesthesia system 2 is a fresh gas, which is for example a mixture of oxygen and nitrous oxide or a mixture with air, separated into two different gas streams. A first gas flow of the two gas streams is through the gas stream supply line 30 to the evaporation chamber 54 directed. The evaporation chamber 54 may be in direct pneumatic communication with the anesthetic agent in the anesthetic agent container 8th be. The first gas stream is in the evaporation chamber 54 saturated with anesthetic, so by the gas flow discharge 32 a saturated anesthetic vapor from the module 6 to the anesthesia machine 4 arrives. The second gas flow of. Gas flows are directed by means of a bypass to a mixing unit. To the mixing unit also leads the gas flow discharge 32 , Thus, the two gas streams are mixed to form a starting gas stream, namely the fresh gas stream enriched with anesthetic vapor. From the mixing ratio of the two gas streams results in the final concentration of Anästhesiemittelgases. The dosing unit 10 , for example, a throttle valve for the gas flow line 30 , the mixing unit and / or the evaporation chamber 54 may include the anesthetic machine 4 or the module 6 assigned to the anesthesia machine or 4 and the module 6 be distributed. If a gas flow through the gas flow line 30 in the evaporation chamber 54 is the anesthetic agent tank 8th in an operating state. Because of the anesthetic agent container 8th For example, the anesthetic passes through a wick or other means of transport into the evaporation chamber 54 , The saturation of the fresh gas with anesthetic depends on the vapor pressure of the anesthetic and is therefore temperature-dependent. If no fresh gas through the gas flow line 30 to the evaporation chamber 54 is the anesthetic agent tank 8th not in an operating state. Rather, the anesthetic agent container 8th then in a decoupled state. To determine if a gas flow through the gas flow line 30 leads, can be a corresponding sensor 56 , In particular, a gas flow sensor or a flow sensor may be provided. This serves to measure the volume flow and / or the mass flow of gas through the gas flow supply line 30 , Therefore, the measuring signal of the gas flow sensor is suitable 56 as a state-relevant measured variable for the anesthetic agent container 8th , If this is detected, the condition of the anesthetic agent container can be determined by means of the corresponding measured variable 8th be determined. To determine the appropriate information, is the gas flow sensor 56 by means of a communication line with the control unit 38 connected.

A fourth embodiment of the anesthesia system 2 is in a schematic representation in 4 resist given. The fourth embodiment of the anesthesia system 2 This corresponds essentially to the third embodiment of the anesthesia system 3 , wherein the locking device 16 and the associated blocking means 18 and the locking device 26 and the associated locking means 52 analogous to the second embodiment of the anesthesia system 2 out 2 is trained. It is therefore with respect to the structure and operation analogous to the explanations to the 3 and the 2 Referenced.

From the 5 is a fifth form of anesthesia system 2 to take in a schematic representation. The fifth embodiment of the anesthesia system 2 essentially corresponds to the third embodiment of the anesthesia system 2 out 3 , It is therefore referred to the corresponding disclosure. However, for the fifth embodiment, attention has been paid to the locking device 26 by means of a corresponding actuator provided with a locking means 52 is connected to the locking means 52 to move so that the opening closure 24 can be locked or unlocked, omitted. The locking of the opening closure 24 this happens rather by a contour configuration of the module holder 20 , In this regard, reference is made to the explanatory notes to the 7 to 10 Referenced.

From the 6 is a sixth form of anesthesia system 2 to take in a schematic representation. The sixth embodiment of the anesthesia system 2 essentially corresponds to the first embodiment of the anesthesia system 2 out 1 , It is therefore referred to the corresponding disclosure. For the sixth embodiment, however, the locking device was used 26 by means of a corresponding actuator provided with a locking means 52 is connected to the locking means 52 to move so that the opening closure 24 can be locked or unlocked, omitted. The locking of the opening closure 24 this is done rather by a contour design of the module recording 20 , In this regard, reference is made to the explanatory notes to the 7 to 10 Referenced.

From the 7 is a section of a perspective. Representation of a first embodiment of an opening closure 24 refer to. The opening closure 24 grips into a groove with an outside, narrow end area 58 the module recording 20 , Due to the design of the opening closure 24 and the associated, in particular corresponding groove 58 becomes a locking device 26 educated. With the inclusion of the module 6 in the module holder 20 , sums up the opening lock 24 in the groove 58 , whereby this is locked against rotation. An opening of the filling opening 22 by turning the opening closure 24 is therefore no longer possible. The locking device 26 Therefore, it is also used as an integral locking device 26 designated.

From the 8th is a perspective view of the opening closure 24 out 7 with one from the module holder 20 partially withdrawn module 6 refer to. By pulling out the module 6 performs the opening closure 24 out of the groove 58 out. Thus, the opening closure can be 24 twist it around the filling opening 22 to disclose. Then can anesthetic through the filling 22 into the anesthetic container 8th are given.

From the synopsis and the corresponding explanations of the 7 and 8th can be seen that the locking device 26 together through the module 6 and the module holder 20 or the anesthetic machine 4 can be trained. In addition, can be with such a configuration on a locking means 52 For example, in the form of a slider or a pen, waive. Rather, the locking takes place with the complete inclusion of the module 6 in the module holder 20 , Is the module 6 through the locking device 16 and / or the associated blocking means 18 locked, immediately takes place a locking of the opening closure 24 , Because the module 6 can no longer, as in 8th shown from the module holder 20 be pulled out. Rather, the module remains 6 , as in 7 shown in the module holder 20 locked, so that the user does not accidentally open the shutter 24 can open. The user only receives access to the filling opening 22 when the anesthetic agent tank 8th in a decoupled state by the locking device 16 the connection between the module 6 and the module holder 20 unlocks or unlocks. Then the user can like in 8th represented the module 6 from the module holder 20 take, for example, a filling with anesthetic for the anesthetic agent container 8th make.

From the 9 and 10 is an alternative embodiment for the locking of the opening closure 24 by means of the module holder 20 or the anesthetist 4 refer to. From the 9 is a schematic cross-sectional view of a second embodiment of an opening closure 24 refer to. The opening closure is by means of a joint 60 on the module 6 hinged, so that the opening closure 24 only by means of the joint 60 open when the module 6 at least partially from the module holder 20 pulled out, as for example in 10 is shown. Is the module 6 , as in 9 shown completely in the module holder 20 introduced, affects the module recording 20 as a lock on the joint 60 so that the opening closure 24 not by means of the joint 60 can be opened. Rather, the module holder locks 20 the opening closure 24 so that it can not be opened. The module holder 20 Therefore, it forms together with the joint 60 and the opening closure 24 a locking device 26 ,

From the 11 and 12 is a further advantageous embodiment of the locking device 16 refer to. The locking device 16 is an opening check unit 28 assigned. The opening check unit 28 may be formed, for example, as a rod-shaped element that of the module receiving 20 is guided. One end of the opening check unit 28 can over an outer edge of the module receptacle 20 protrude, provided the module 6 not yet completely in the module recording 20 is introduced. Is the opening closure 24 correct on the module 6 placed, closes the opening closure 24 the filling opening 22 , With the insertion of the module 6 in the module holder 20 meets the opening lock 24 on the opening check unit 28 so that these are guided by the module holder 20 , shifts. This will be another blocking agent 64 repositioned in the way, in particular, twisted that the module 6 completely into the module holder 20 can be used. A corresponding inserted module 6 is from the 12 refer to.

Was accidentally forgotten by the user, the opening shutter 24 to place it so that it is the filling opening 22 closes, the Öffnungsverschlussprüfeinheit 28 with the insertion of the module 6 in the module holder 20 not moved, because of the lack of opening 24 not on the opening check unit 28 meets. Therefore, also the position of the further blocking means 64 not changed. The module has at one of the other blocking means 64 facing side a blocking edge 62 on. Will now the module in the module recording 20 pushed, the more blocking means hits 64 on the blocking edge 62 of the module 6 , This will be another insertion of the module 6 in the module holder 20 prevented. The module 6 , and thus also the anesthetic agent container 8th , thus can not connect to the anesthesia machine 4 produce. The user can use the anesthesia system 2 therefore do not start up. This prevents the user from being exposed to anesthetics which may result in malfunctioning of the anesthetic agent container 8th from the filling opening 22 could flow.

Alternatively to the embodiment, as with reference to the 11 and 12 has been explained, the anesthesia system 2 , in particular the anesthetic machine 4 and / or the module 6 have a test unit, by means of the presence and / or a correct fit of the opening closure 24 is verifiable. The test unit then forms the opening check unit 28 ,

A picture of the module 6 from the module holder 20 is by means of the further locking device 64 approved, if by means of the opening check unit 28 a correct seat of the opening closure 24 , in particular at the filling opening 22 , is recognized. On the other hand, a recording of the module 6 from the module holder 20 by means of the further locking device 64 prevented when by means of the Öffnungsverschlussprüfeinheit 28 an incorrect fit of the opening closure 24 of the module 6 , in particular at the filling opening 22 , or a lack of the opening closure 24 was detected.

LIST OF REFERENCE NUMBERS

2

anesthesia system

4

anesthesia machine

6

module

8th

Anesthetic container

10

dosing

12

fluid line

14

vent valve

16

locking device

18

blocking means

20

module mounting

22

filling

24

opening closure

26

locking device

28

Öffnungsverschlussprüfeinheit

30

Gas-line

32

Gas power dissipation

34

pressure line

36

pressure valve

38

control unit

40

Pressure relief line

42

Pressure relief valve

44

Injector

46

injection

48

pressure sensor

50

communication unit

52

locking means

54

evaporation chamber

56

Gas flow sensor

58

groove

60

joint

62

blocking edge

64

blocking means

Claims (12)

Method for operating an anesthesia system ( 2 ) with i. an anesthesia machine ( 4 ii. one on the anesthesia machine ( 4 ) releasably attachable module ( 6 ) containing an anesthetic agent container ( 8th ), and iii. an anesthesia machine ( 4 ) or the module ( 6 ) associated dosing unit ( 10 ) used for admixing anesthetic agent of the anesthetic agent container ( 8th ) is formed in a gas stream, iv. wherein the anesthetic agent container ( 8th ) 1. in an operating state for providing one of the anesthetic agent container ( 8th 2) in an uncoupled state for detaching the module ( 6 ) of anesthesia machine ( 4 ) and / or for filling with anesthetic, v. a locking device ( 16 ) to block a connection between the module ( 6 ) and the anesthesia machine ( 4 ) for preventing decoupling of the module ( 6 ) from the anesthesia machine ( 4 ), and to unlock a connection between the module ( 6 ) and the anesthesia machine ( 4 ) for enabling decoupling of the module ( 6 ) from the anesthesia machine ( 4 ), and vi. a sensor ( 48 . 56 ) for detecting a state-relevant measured variable of the anesthetic agent container ( 8th ), characterized by the steps: vii. Detecting one for the anesthetic agent container ( 8th ) state-relevant measured variable by means of the sensor ( 48 . 56 ) viii. Determining the operating state or the decoupled state of the anesthetic agent container ( 8th ) by means of the measured variable, ix. Lock a connection between the module ( 6 ) and the anesthesia machine ( 4 ) when the anesthetic agent container ( 8th ) is in the operating state, and x. Unlock the connection between the module ( 6 ) and the anesthesia machine ( 4 ) when the anesthetic agent container ( 8th ) is in the uncoupled state. Method according to the preceding claim, characterized in that the pressure P in the anesthetic agent container ( 8th ) and / or the temperature T in the anesthetic agent container ( 8th ) is detected. Method according to one of the preceding claims, characterized in that the volumetric flow V or the mass flow M of the gas flow is detected as the measured variable. Method according to one of the preceding claims, characterized in that as a measured variable, a fluid flow F through the fluid line ( 12 ), which is used to transport anesthetic from the anesthetic agent container ( 8th ) to the dosing unit ( 10 ) is trained. Method according to one of the preceding claims, characterized in that a switching position S of a venting valve ( 14 ) of the anesthetic agent container ( 8th ) is detected. Method according to one of the preceding claims, characterized in that the locking device ( 16 ) a blocking agent ( 18 ), i. the blocking agent ( 18 ) in a the connection between the module ( 6 ) and the anesthesia machine ( 4 ) locking position when the anesthetic agent container ( 8th ) is in operating condition, and ii. the blocking agent ( 18 ) in a the connection between the module ( 6 ) and the anesthesia machine ( 4 ) unlocking position is moved when the anesthetic agent container ( 8th ) is in the uncoupled state. Method according to one of the preceding claims, characterized in that the anesthetic agent container ( 8th ) with a lowering of the associated pressure P in the anesthetic agent container ( 8th ) is transferred from an operating pressure to an ambient pressure of the operating state in the uncoupling state. Method according to one of the preceding claims, characterized in that an admixing of anesthetic by means of the dosing unit ( 10 ) in the decoupling state of the anesthetic agent container ( 8th ) is blocked. Method according to one of the preceding claims, characterized in that the anesthesia machine ( 4 ) a module recording ( 20 ) for receiving the module ( 6 ), wherein a filling opening ( 22 ) of the anesthetic agent container ( 8th ) with a recording of the module ( 6 ) into the module receptacle ( 20 ), is positively locked. Method according to the preceding claim, characterized in that the filling opening ( 22 ) of the anesthetic agent container ( 8th ) with a removal of the module ( 6 ) from the module holder ( 20 ) is released. Method according to one of the preceding claims 1 to 5, characterized in that the anesthetic agent container ( 8th ) a filling opening ( 22 ) with an opening closure ( 24 ) and for the opening closure ( 24 ) a locking device ( 26 ), i. the opening closure ( 24 ) by means of the locking device ( 26 ) is locked when the anesthetic agent container ( 8th ) is in operating condition, and ii. the opening closure ( 24 ) by means of the locking device ( 26 ) is unlocked when the anesthetic agent container ( 8th ) is in the uncoupled state. Method according to one of the preceding claims, characterized in that the anesthesia system ( 2 ) an opening closure test unit ( 28 ), i. a recording of the module ( 6 ) from the module holder ( 20 ) by means of the locking device ( 16 ) is allowed, if by means of the opening closure test unit ( 28 ) a correct fit of the opening closure ( 24 ) of the module ( 6 ), ii. a recording of the module ( 6 ) from the module holder ( 20 ) by means of the locking device ( 16 ) is prevented when by means of the opening closure test unit ( 28 ) an incorrect fit of the opening closure ( 24 ) of the module ( 6 ) or a lack of the opening closure ( 24 ) is recognized.

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