DE102019002576B4 - Ventilation device - Google Patents

Abstract

Device (20) for assessing a patient's condition, the device (20) comprising a sensor system (24), means (34) for comparing a measured value (26) that can be recorded by means of the sensor system (24) with a predetermined or predeterminable threshold value (28), and comprises a signaling unit (38), with an end-tidal CO2 measured value relating to a CO2 content in the breathing gas exhaled by the patient being recorded by means of the sensor system (24) prior to the start of automatic ventilation by the device (20), the means (34 ) are designed for comparison, to automatically compare the end-tidal CO2 measured value (26) with the threshold value (28), the means (34) for comparison being designed to generate a status signal (36) as a function of the result of the comparison, with an end-tidal CO2 measured value (26) above 35 mmHg, the generated status signal (36) indicates that no ventilation is required, • where with an end-tidal CO2 measured value (26) underhal b of 5 mmHg, the generated status signal (36) indicates that ventilation is required, the signaling unit (38) being controllable on the basis of the status signal (36), a status of the signaling unit (38) resulting from the status signal (36) determining this is to signal an operator of the device (20) whether or not ventilation of the patient is necessary, and whereia. in the case of a measured value (26) exceeding the threshold value (28), the device (20) can be activated to ventilate the patient, b. if the measured value (26) falls below the threshold value (28), the device (20) for ventilation of the patient is automatically activated.

Description

The invention relates to a device for assessing a patient's condition and a device for ventilating a patient.

Devices for ventilating a patient are, for example, ventilators or anesthesia machines. Ventilators and anesthesia machines - hereinafter referred to collectively as ventilators or individually as ventilators, are used to provide breathing air to patients who are either unable to breathe independently or who need help with breathing. For example, the patients wear a face mask that covers their mouth and nose. The face mask or the like is connected to the ventilator via at least one ventilation hose.

In contrast to ventilators used in everyday clinical practice, so-called emergency ventilators are also known, which are set and operated for ventilating emergency patients, for example by a trained emergency doctor or a trained paramedic. If such a device is not or not yet available at the site of a necessary emergency treatment, the first aid workers on site often ventilate with a breathing bag and a mask. Such breathing bags are inexpensive, storable and simple and ready for immediate use. That is why such breathing bags are part of the usual equipment of rescue vehicles and fire brigade vehicles.

In the case of ventilation using a breathing bag, there is usually no data available that would allow a statement to be made regarding the success of the ventilation (monitoring). However, using a breathing bag requires a lot of experience and knowledge in order to provide the emergency patient with the necessary breathing rate, appropriate airway pressures and the correct tidal volume. In a stressful situation, as it usually arises for a first aid worker at an emergency location, mistakes can easily be made here, which can lead to later longer therapy times or even to permanent damage.

Ventilators that allow adequate ventilation are comparatively expensive and are usually only available in connection with the arriving emergency doctor. In addition, the setting and operation of such a ventilator requires at least a briefing and can therefore usually only be operated by professionally trained personnel with the speed necessary especially in emergency situations.

From the DE 10 201 7009 602 A1 a device for ventilating a patient is known, in which the ventilator for the automatic setting of ventilation parameters is given an estimated value with respect to a biometric feature of the patient. The estimated value can relate, for example, to the patient's body weight. The ventilator automatically determines ventilation parameters that match the estimated value on the basis of the estimated value. The ventilator starts with these, as in the DE 10 2017 009 602 A1 described the ventilation of the patient. Such an estimated value can also be entered by an operator of the ventilator with little or no medical training. The operator does not have to deal with the selection of specific ventilation parameters. This is done by the ventilator. In the DE 10 201 7009 602 A1 It has also already been described that if ventilation is started on the basis of such an estimated value, a measured value is determined with regard to the tidal volume of the ventilated patient while the patient is being ventilated. Depending on whether the measured value is greater or less than a tidal volume assumed on the basis of the estimated value, an inspiratory ventilation pressure that is effective for ventilating the patient is automatically increased or decreased. In this way, the ventilation and the ventilation parameters, including the inspiratory ventilation pressure, are automatically adapted to the respective conditions. A possibly incorrectly estimated weight value and the resulting, not yet optimally matching, initially applied ventilation parameters are therefore essentially uncritical and the ventilation device automatically adjusts the automatic ventilation in a physiologically sensible manner.

The EP 2 707 068 B1 shows a medical ventilation system with a feedback unit for ventilation quality. With the help of a detection of an end-tidal carbon dioxide concentration, it is determined whether, based on a determined patient condition or status of the patient, there are signs of increasing ventilation. As a further possibility of a patient's condition, the EP 2 707 068 B1 Characterization based on the extensibility of the lungs (compliance). Further possibilities to characterize a patient's condition are in the EP 2 707 068 B1 for example also situations of barotrauma, pneumothorax, lung overextension, unstable thorax, hemothorax, intubation, cardiopulmonary resuscitation (CPR compressions).

One object of the present invention is to provide a device for assessing a patient's condition.

According to the invention, this object is achieved with a device having the features of claim 1.

According to the invention, this device for assessing a patient's condition is designed to determine whether ventilation of a patient is indicated.

For this purpose, it is provided that a device for assessing a patient's condition, referred to below as a patient module, includes a sensor system for recording a measured value or that the patient module is assigned such a sensor system that at least one measured value is recorded and recorded by means of the sensor system, which indicates a physiological state of the patient Indicated patient or at least a clue or an indication of a physiological state of the patient is that the measured value is automatically compared with a predetermined or predeterminable threshold value and that a status signal is generated depending on the result of the comparison. The measured values recorded by means of the sensor system are made available to a control unit. The control unit is preferably arranged in the patient module or assigned to the patient module. The control unit carries out this comparison of measured values with a predefined or predefinable threshold value and generates the status signal. The control unit provides the status signal.

According to the invention, a signaling unit is activated on the basis of the status signal, for example a signal light and / or a screen with a plain text display. A status of the signaling unit resulting from the status signal, for example a plain text display in a form such as “ventilation not necessary”, signals to an operator of the patient module whether or not ventilation of the patient is necessary. According to the invention, the patient module functions as a device for assessing a patient's condition. The advantage of the inventive solution proposed here is that an operator of the patient module automatically receives information based on the evaluation of a measured value recorded on the patient about whether or not ventilation of the patient is necessary. The operator does not need to make the decision for or against ventilation himself, which is an enormous relief especially for an operator, for example a first aider, who does not have sufficient medical expertise to make such a decision himself.

It can be assumed that with this possibility of operating a patient module functioning as a ventilator, even less experienced first aiders will be able to better ensure ventilation of an emergency patient, at least until medically trained personnel, for example an emergency doctor, arrive. In any case, it can be assumed that an inhibition threshold resulting from concerns about possibly incorrectly operating the patient module functioning as a ventilator is significantly reduced and that this avoids the risk of a fundamentally possible, at least initial emergency ventilation not being performed due to ignorance or fear.

Furthermore, in a preferred embodiment, the patient module can also function as a device for mechanical ventilation of the patient. In this preferred embodiment, the device, that is to say the patient module, comprises a valve section and a pressurized gas source. The valve section has an expiratory valve. In terms of flow, the valve section couples to a patient interface which can be connected to the airways of a patient and is optionally detachably connected to the patient module. Nasal masks, endotracheal tubes or a tracheal cannula (tracheal stoma) for coupling to the patient can be used as the patient interface.

An inspiration valve is assigned to the valve section as a further valve; the valve section preferably also has this inspiration valve. The valve section also has a control unit. In this preferred embodiment, the control unit also serves to control and activate the inspiration valve and expiration valve, as well as to control the pressurized gas source. For example, a compressed gas cylinder, a gas delivery unit or on the patient module can be arranged as a compressed gas source or assigned to the patient module.

The sensor system is either part of the patient module, in particular by being integrated into the valve section, or assigned to the patient module and is then located outside the patient module, for example in a ventilation tube leading away from the patient module or in a ventilation tube leading to the patient module.

The patient module is characterized in that the sensor system can record a measured value which encodes a physiological condition of the patient or is at least indicative of a physiological condition of the patient, that the measured value is automatically comparable with a predefined or predefinable threshold value and that in Depending on the result of the comparison, a status signal can be generated. The signaling unit can be controlled on the basis of the status signal, for example a signal light and / or a screen with a plain text display. A state of the resulting on the basis of the status signal Signaling unit, for example a plain text display in a form such as “ventilation not necessary”, is intended to signal to an operator of the patient module whether or not ventilation of the patient is necessary.

The physiological condition of the patient is, for example, that he is breathing in a physiologically normal manner, hyperventilating or hypoventilating. Ventilation only makes sense in a hypoventilating patient, i.e. if there is insufficient ventilation. The state of hyperventilation or hypoventilation can be recognized on the basis of a measured value that can be recorded / recorded by means of the sensor system. The measured value is, for example, a _{measured value recorded by means of a CO 2} sensor, and such a sensor then functions as the sensor system, or the sensor system includes at least one such sensor.

Advantageous refinements of the invention are the subject matter of the subclaims.

According to the invention, the measured value is recorded in relation to breathing gas exhaled by the patient or can be recorded in relation to breathing gas exhaled by the patient. Such a sensor system is located, for example, in a flow path from the patient module to a respective patient interface and by means of the sensor system, for example, a measured value relating to the breathing gas exhaled by the patient can be recorded due to such a placement. Such a measured value is a reliable indicator of a physiological condition of the patient.

According to the invention, the measured value is a CO ₂ measured value and the sensor system is accordingly a CO ₂ sensor or a sensor system comprising at least one CO _{2 sensor.} A CO ₂ reading can be recorded in relation to the breathing gas exhaled by the patient (etCO ₂ ). The patient module can then directly comprise a corresponding sensor system.

The carbon dioxide concentration in the patient's exhaled breathing gas follows the course of inhalation and exhalation. At the beginning of the exhalation, essentially an amount of gas is breathed back which, when the previous inhalation was taken, only reached the upper respiratory tract and did not take part in the gas exchange in the lungs. This amount of gas exhaled at the beginning shows almost no concentration of carbon dioxide. In the further course of exhalation, the carbon dioxide concentration rises very steeply in a healthy person to partial pressure values above 35 mmHg and then approaches the end-tidal carbon dioxide concentration (etCO ₂ ) of approx. 40 mmHg.

As a possible and suitable threshold value for differentiating whether a person breathes sufficiently independently by means of their own breathing activity or this person is to be regarded as a patient who requires mechanical ventilation, supportive ventilation or, if necessary, an addition of an increased oxygen concentration above the oxygen concentration of 21% in the Ambient air is required, for example in a range of 30% -40%, a threshold value range of the carbon dioxide concentration of 15 mmHg to 33 mmHg can be used.

According to the invention, the presence of an end-tidal carbon dioxide concentration (etCO ₂ ) of above 35 mmHg can indicate a situation that the person does not need ventilation and that a patient who has previously been mechanically ventilated no longer needs to be continued. The presence of an end-tidal carbon dioxide concentration (etCO ₂ ) below 5 mmHg - 30 mmHg can indicate a situation in which the person is to be regarded as a patient and requires mechanical ventilation.

A CO ₂ measured value can additionally or alternatively also be recorded by means of a subcutaneous or a transcutaneous CO ₂ sensor. Such a sensor system is assigned to the patient module, in the sense that a _{measured value obtainable from the CO 2} sensor is fed to the patient module.

As an alternative or in addition to a CO ₂ sensor, an O ₂ blood saturation sensor (SaO ₂ ) can also be used. Such a sensor measures the oxygen saturation in the blood using an optical measuring principle of infrared / red transillumination of a finger or earlobe. If the gas-to-blood gas exchange is disturbed, for example because the patient is not breathing, this becomes visible in the measured value and in the time course of the recorded measured value of the oxygen saturation in the blood.

As a possible and suitable threshold value for differentiating whether a person breathes sufficiently independently by means of their own breathing activity or this person is to be regarded as a patient who requires mechanical ventilation, supportive ventilation or, if necessary, an addition of an increased oxygen concentration above the oxygen concentration of 21% in the Ambient air is required, for example in a range of 30% -40%, a threshold value range for oxygen saturation (SaO ₂ ) of 85% to 91% can be used.

An oxygen saturation (SaO ₂ ) of more than 90% can indicate a situation that the person does not need ventilation, as well as that in the case of one mechanically mechanical ventilation is no longer required for ventilated patients. An oxygen saturation (SaO ₂ ) of below 85% can indicate a situation that the person is to be regarded as a patient and requires mechanical ventilation.

In these considerations for a situation differentiation on the basis of suitable threshold values, effects such as those resulting, for example, from special clinical pictures, states of shock as well as actions of first aiders on the physiological situation, are not taken into account.

As a further alternative or in addition, a pressure sensor and / or a flow sensor for a pneumatic evaluation of the patient's spontaneous breathing can also be considered as a sensor system.

In a particular embodiment, both measured values of the carbon dioxide concentration and measured values of the oxygen saturation can be used by the control unit to assess the situation as to whether ventilation is required. This can be advantageous in order, for example, to be able to compensate for incorrect measurements caused by user interaction with the aid of the plausibility considerations carried out on the basis of the measured values of carbon dioxide concentration and oxygen saturation.

In a preferred embodiment of the device, the measured value is recorded by means of a sensor system comprised by a valve section of the patient module, for example by means of a sensor system integrated into the valve section. In such an embodiment, too, the sensor system is located in a flow path away from the patient module or towards the patient module. The advantage of such an embodiment is the compactness of the solution. The sensor system can, for example, be combined with structural sections of the valve section, for example in that the sensor system is essentially enclosed in a wall section of the valve section. A separate housing for the sensors is no longer necessary. The sensor system is protected within the valve section and spatially fixed in the valve section. This also ensures that the sensor system records measured values very close to the patient and that the sensor system always records the measured values at the same location and, in relation to the flow path, at a constant distance from the patient.

In a particularly preferred embodiment of the device, the device for assessing a patient's condition by means of the valve section with at least one expiration valve, the patient interface and the compressed gas source with control unit with the associated optional inspiration valve is designed as a ventilation device for ventilation of a patient and is provided for this purpose in the case of a If the measured value falls below the threshold value, automatically activate an operating mode with mechanical ventilation of the patient. The valve section with the at least one valve designed as an expiration valve preferably also has the valve designed as an inspiration valve. Valve section, inspiration valve, expiration valve, pressurized gas source, control unit form suitable means for expanding the device for assessing a patient's condition into a device for ventilating a patient or a ventilating device.

In a further preferred embodiment of the device, if the measured value exceeds the threshold value, the patient module can be activated to ventilate the patient. This advantageously ensures that the patient module cannot be activated by mistake if the patient does not need to be ventilated.

In a further preferred embodiment of the device, in the event of a measured value exceeding the threshold value, a patient module previously activated for ventilation is deactivated again and ventilation of the patient by the patient module is thus ended. This advantageously ensures that the patient does not have to breathe against the patient module.

In a further preferred embodiment of the device, in the event of a measured value exceeding the threshold value, a patient module previously activated for ventilation is deactivated again and ventilation of the patient by the patient module is terminated and activation of the patient module for ventilation of the patient is blocked. This advantageously ensures that the patient module cannot be activated by mistake if the patient does not need to be ventilated.

An exemplary embodiment of the invention is explained in more detail below with reference to the drawing. Objects or elements that correspond to one another are provided with the same reference symbols in all figures.

The exemplary embodiment is not to be understood as a restriction of the invention. Rather, changes and modifications are possible within the scope of the present disclosure, in particular those variants and combinations which, for example, by combining or modifying individual parts in connection with the general or special description part described and in the claims and / or the drawing Features contained can be inferred by the person skilled in the art with a view to solving the problem and lead to a new object through combinable features.

Figure list

• 1 a patient ventilated by means of a pressurized gas source and a patient module and
• 2 the patient module with further details, namely a processing unit for evaluating a measured value that can be generated by means of a sensor system of the patient module.

The representation in 1 shows - schematically greatly simplified - a patient who is used as a patient interface for ventilation 10 wears a functioning breathing mask (ventilation mask). Instead of a breathing mask come as a patient interface 10 in principle, for example, a so-called tube (endotracheal tube) or an endotracheal cannula can also be considered. The following description will be based on the example of a breathing mask that is much easier to use as a patient interface than a tube, without renouncing any further general validity 10 continued, because the innovation proposed here is primarily intended to enable a patient to be ventilated in an emergency situation without the need for special experience from a first aider or the like. The patient wears the breathing mask in a manner known per se over the mouth and nose and the breathing mask is for example by means of straps 12th or held in this position by the helper. The breathing mask / patient interface 10 is connected to a source of pressurized gas in a manner known per se 14th , for example a pressurized gas cylinder or the like, connected. For this it runs from the pressurized gas source 14th to the patient interface 10 at least one breathing tube 16 , in particular at least one or exactly one ventilation tube functioning as an inspiration tube 16 which breathing gas from the pressurized gas source 14th to the patient interface 10 directs.

The at least one breathing tube 16 is on the patient interface side 10 to one with the patient interface 10 connected or as a coupling unit to the patient interface 10 functioning patient module 20th connected.

For the intended ease of use, one is from the patient module 20th included or (as shown) by the patient module 20th independent and communicative with the patient module 20th connected control unit 22nd intended. When communicating with the patient module 20th connected control unit 22nd is a transmission of data from the control unit via a wired or wireless communicative connection in a manner known per se 22nd to the patient module 20th possible, whereby the transferred data is one on the control unit 22nd code the entry made. As a control unit 22nd For example, a so-called smartphone or the like can also be considered.

On the control unit 22nd If a helper for ventilation of the patient enters an estimate, for example an estimate of the weight of the patient. No further entry is required. With such an input, the patient can theoretically be ventilated by means of the patient module 20th begin.

Before starting automatic ventilation using the patient module 20th is by means of one of the patient module 20th included sensors 24 a measured value recorded, which can be evaluated as an indicator with regard to a physiological situation of the patient. As a sensor 24 a CO ₂ sensor is particularly suitable. A measured value is obtained by means of such a CO _{2 sensor} 26th ( 2 ) with regard to the CO ₂ content in the breathing gas exhaled by the patient.

Only if the measured value has a predefined or predefinable threshold value 28 ( 2 ) exceeds (etCO ₂ > 45 mmHg), ventilation is by means of the patient module 20th makes sense. As long as the measured value remains below, for example, etCO ₂ = 35 mmHg or 3 vol% CO ₂ , the patient exhales a sufficient amount of CO ₂ during spontaneous breathing.

The representation in 2 shows the patient module 20th - still schematically simplified - with further details. After that, the patient module includes 20th the mentioned sensors 24 and a valve section 30th . The valve section (valve unit) 30th comprises at least one expiratory valve 32 . Optional includes the valve section 30th at least one expiratory valve 32 and at least one inspiratory valve (not shown). The valve section preferably comprises 30th the sensors 24 , for example by adding the sensors 24 at least one of the valve section 30th included valve is assigned, for example the at least one expiratory valve 32 .

One by means of the sensors 24 more absorbable and when using the patient module 20th recorded measured value 26th is by means of a for processing and evaluating the measured value 26th specific processing unit 34 evaluable. The processing unit 34 can be in the patient module 20th or in the control unit 22nd or the control unit 22nd can be used as a processing unit 34 act. In the interest of better readability of the further description, this is based on a from Patient module 20th included processing unit 34 continued. The alternative options mentioned are always to be read along with this.

The processing unit 34 acts essentially as a comparator by means of the processing unit 34 the measured value 26th in a basically known manner with a threshold value 28 is compared. For this, the threshold 28 the processing unit 34 for example, embossed in an automatically evaluable form, for example in a memory location of the processing unit 34 loaded.

The processing unit generates the result of the comparison 34 a status signal 36 which codes the need for automatic ventilation of the patient. The status signal 36 is used as the basis for controlling at least one signaling unit 38 used. As a signaling unit 38 an optical and / or acoustic signaling unit come 38 into consideration. At the in 2 The situation shown as an example is the signaling unit 38 as part of the control unit 22nd and there one of the control unit functions 22nd included display unit, so for example a screen or the like, as a signaling unit 38 . By means of such a signaling unit or a similar one 38 for example, the result of the automatic evaluation of the measured value 26th as a message 40 be displayed pictographically and / or in plain text, for example in a form such as “Ventilation is not necessary” or “Ventilation is necessary”.

In the case of the threshold 28 below the measured value 26th generates the processing unit 34 a status signal 36 , which by means of the signaling unit 38 signals to a respective operator of the patient module that ventilation of the patient is not necessary. In the case of the threshold 28 exceeding measured value 26th accordingly becomes a status signal 36 generated, which by means of the signaling unit 38 signals to the operator of the patient module 20 that ventilation of the patient is necessary.

The control unit 22nd comprises its own processing unit in a manner which is basically known per se 42 , which automatically include such in the representation in 2 Control of the signaling unit illustrated only by means of a block arrow 38 depending on the value of the status signal 36 causes.

The operator of the patient module 20th decides depending on the means of the signaling unit 38 signaled state of the patient, whether the patient module 20th is activated or not to automatically ventilate the patient. In one by means of the signaling unit 38 output optical and / or acoustic warning signal, the operator is the patient module 20th not activate. In one by means of the signaling unit 38 issued message 40 the operator becomes the patient module 20th also do not activate if the message 40 states or illustrates that automatic ventilation of the patient by means of the patient module 20th is unnecessary or even impermissible.

In a special embodiment of the patient module 20th is the threshold at one 28 below the measured value 26th activation of the patient module 20th not possible to automatically ventilate the patient, ie the patient module 20th is automatically blocked to prevent unauthorized activation. Such an automatic locking of the patient module 20th against an impermissible activation is for example as a function of the processing unit 34 implemented. A processing unit 34 with such a function generates the threshold value in the case of, for example 28 below the measured value 26th at least one as a blocking signal 44 acting and attached to the valve section 30th output control signal, which there causes that the or each valve of the valve section 30th assumes a predetermined position in which there is no connection between the pressurized gas source 14th and the patient interface 10 consists.

Such an automatic locking of the patient module 20th against an impermissible activation can also be used as a function of the control unit 22nd be implemented. Then a from the control unit 22nd generated locking signal 44 to the patient module 20th and there, for example - as described above - internally to the valve section 30th forwarded or as a control signal for the valve section 30th processed.

Individual aspects of the description submitted here that are in the foreground can thus be briefly summarized as follows: A method for ventilating a patient and a method that works according to the method and here as a patient module are specified 20th designated device, by means of one of the patient module 20th included or the patient module 20th assigned sensors 24 a measured value 26th is recorded, with the measured value 26th automatically with a predefined or predefinable threshold value 28 is compared, a status signal depending on the result of the comparison 36 is generated, based on the status signal 36 a signaling unit 38 is controlled and where a due to the status signal 36 resulting state of the signaling unit 38 an operator of the patient module 20th information on this conveys (signals) whether ventilation of the patient is necessary or not.

List of reference symbols

10

Patient interface

12th

Banding

14th

Pressurized gas source

16

Breathing tube

18th

Breathing tube

20th

Patient module

22nd

Control unit

24

Sensors

26th

Measured value

28

Threshold

30th

Valve section

32

Expiratory valve

34

Processing unit (of the patient module)

36

Status signal

38

Signaling unit

40

report

42

Processing unit (of the control unit)

44

Locking signal

Claims (5)

Device (20) for assessing a patient's condition, the device (20) comprising a sensor system (24), means (34) for comparing a measured value (26) that can be recorded by means of the sensor system (24) with a predetermined or predeterminable threshold value (28), and _{a signaling unit (38), with an end-tidal CO 2} measured value relating to a CO ₂ content in the breathing gas exhaled by the patient being recorded by means of the sensor system (24) prior to the start of automatic ventilation by the device (20), the means (34) are designed for comparison, to automatically compare the end-tidal CO ₂ measured value (26) with the threshold value (28), the means (34) being designed for comparison to generate a status signal (36) as a function of the result of the comparison generate, • with an end-tidal CO ₂ measured value (26) above 35 mmHg, the generated status signal (36) indicates that no ventilation is required, • with an end-tidal CO ₂ measured value rt (26) below 5 mmHg, the generated status signal (36) indicates that ventilation is required, the signaling unit (38) being controllable on the basis of the status signal (36), with a status of the signaling unit (36) resulting from the status signal (36) 38) is intended to signal to an operator of the device (20) whether or not ventilation of the patient is necessary and where a. in the case of a measured value (26) exceeding the threshold value (28), the device (20) for ventilation of the patient can be activated, b. if the measured value (26) falls below the threshold value (28), the device (20) for ventilation of the patient is automatically activated. Device (20) after Claim 1 wherein the device (20) has a valve section (30) with at least one valve (32) designed as an expiratory valve (32). Device (20) according to one of the Claims 1 or 2 , the sensor system (24) being integrated into the valve section (30). Device (20) after Claim 3 , wherein the sensor system (24) is integrated into the valve section (30) in that the sensor system (24) is combined with structural sections of the valve section (30). Device (20) after Claim 3 , wherein the sensor system (24) is integrated into the valve section (30) in that the sensor system (24) is enclosed in a wall section of the valve section (30).

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