Source: https://patents.google.com/patent/CA2911238A1/en
Timestamp: 2020-03-31 10:14:59
Document Index: 482021626

Matched Legal Cases: ['art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 103', 'art 103', 'art 103', 'art 103', 'art 103', 'art 103', 'art 103', 'art 103', 'art 103', 'art 4', 'art 123']

CA2911238A1 - Device and method for artificial respiration in emergencies - Google Patents
Device and method for artificial respiration in emergencies
CA2911238A1
CA2911238A1 CA2911238A CA2911238A CA2911238A1 CA 2911238 A1 CA2911238 A1 CA 2911238A1 CA 2911238 A CA2911238 A CA 2911238A CA 2911238 A CA2911238 A CA 2911238A CA 2911238 A1 CA2911238 A1 CA 2911238A1
CA2911238A
Karl Kufner & Co KG GmbH
KARL KUFNER GMBH & CO. KG
2014-05-13 Application filed by KARL KUFNER GMBH & CO. KG filed Critical KARL KUFNER GMBH & CO. KG
2014-11-20 Publication of CA2911238A1 publication Critical patent/CA2911238A1/en
230000029058 respiratory gaseous exchange Effects 0 title claims abstract description 41
230000035812 respiration Effects 0 title claims abstract description 36
230000000241 respiratory Effects 0 claims abstract description 41
230000035515 penetration Effects 0 claims description 44
A device and a method for artificial respiration in emergencies are proposed. The device is equipped with a ventilator mask (40) which can be placed onto the nose and mouth section of a person to be provided with artificial respiration, comprising a mouthpiece (41), through which respiratory air from an aider can be supplied, comprising a flow tube (2) disposed between the ventilator mask (40) and the mouthpiece (41), which flow tube forms a continuous flow channel for the supplied respiratory air from the mouthpiece (41) to the ventilator mask (40), comprising at least one sensor (10) disposed in the flow channel of the flow tube (2), which sensor measures parameters of the gases flowing through the flow channel, comprising a processor disposed on the flow tube (2) and comprising an output apparatus (124). Here, the processor processes the mass or volumetric flow registered by the flow sensor (10) to form an output signal. The output apparatus (124) emits the output signal.
, Title: Device and method for artificial respiration in emergencies DESCRIPTION
In an accident or other medical emergency, the affected persons need to be given first aid by first responders until professional rescue services arrive.
First responders are individuals who, by chance, are in a position to take life-saving emergency action in an accident or medical emergency. If the person who has suffered an accident or a medical emergency has entirely or partially ceased to breathe independently or has suffered a circulatory arrest, measures to resuscitate them and to overcome the respiratory arrest must be taken. These include cardiopulmonary resuscitation. If the airways are blocked or obstructed, the airways of the affected person must first be cleared. It may be necessary for an aider to give the person respiration. In a circulatory arrest a cardiac massage must be performed. The purpose of this measure is to supply the vital organs of the affected person with oxygen.
20138775-3-PCT/ 13.05.2014/ sl
- 2 -Excessive pressure must be avoided in this process to prevent aspiration, namely the penetration of saliva, fluid or other matter into the respiratory passages. An adequate volume is achieved when rising of the thorax of the casualty or person in an emergency situation can be identified.
Potential first responders often have no or inadequate knowledge of first aid.
For fear of making mistakes due to this inadequate knowledge, often no or inadequate first aid is provided. In addition, potential first responders often do not recognize a respiratory arrest or a circulatory arrest. The necessary assistance is consequently not given. In mouth-to-mouth resuscitation the aider comes into direct contact with bodily fluids of the casualty or person in an emergency situation, creating the possibility of disease transmission.
Inhibitions therefore often arise.
The invention is based on the task of providing a device and a method for artificial respiration in emergencies, where an aider can supply respiratory air to a casualty or person in an emergency situation without making direct bodily contact with their nose and mouth, and where the aider is assisted with 20138775-3-PCT/ 13.05.2014/ sl
- 3 -supplying respiratory air and administering cardiac massage even if they have no or limited knowledge of first aid.
This task is solved by a device with the characteristics of claim 1 and by a method with the characteristics of claim 15. The device according to the invention is characterized in that there is a flow tube disposed between a respiratory mask which can be placed onto the nose and mouth of a casualty or person in an emergency situation on the one hand and a mouthpiece for the aider on the other hand. This constitutes a continuous flow channel for the air supplied or flowing away from to the person. There is a flow sensor that protrudes into the flow channel disposed on the flow tube. The air led through the flow channel passes around the flow sensor, which registers the mass or volumetric flow of a gas flowing through the flow channel. The volumetric flow of a gas flowing through the flow tube here corresponds to a volume that passes through a specified cross-section of the flow tube per unit of time. The mass flow or mass flow rate of a gas flowing through the flow tube corresponds to a mass that passes through a specified cross-section of the flow tube per unit of time.
The respiratory mask rests on the person's face. If required it may be secured to the person's head with a strap or belt to keep it in position. Thanks to its soft, elastic edge, the respiratory mask lies basically airtight on the person's face.
This results in most of the air flowing out of the person's nose or mouth reaching the flow tube and flowing through it. In doing so, it passes the flow sensor, so that the mass or volumetric flow of the flowing air is determined.
In 20138775-3-PCT/ 13.05.2014/ sl
- 4 -= addition, the air supplied via the mouthpiece by an aider passes through the flow tube into the respiratory mask, and from there into the person's nose and/or mouth. The mass or volumetric flow of the supplied air is likewise registered when it flows through the flow tube. It can be ascertained from the timing of an output signal emitted on the output device whether the output refers to a mass or volumetric flow of an air supplied by the aider or to an air flowing out of the person. If an output signal is emitted by the output device concurrently with the supply of air, it refers to the supplied air. On the other hand, if an output signal is emitted without air being supplied by the aider or if it is emitted at a different time to the supply of air, the output signal refers to an air flowing out of the person.
By means of the device it can be registered whether the casualty or person in an emergency situation has entirely or partially ceased to breathe before artificial respiration or a cardiac massage is performed. If the person has ceased to breathe, the flow sensor will indicate no mass or volumetric flow.
There will then be no corresponding output signal. On the other hand if a mass or volumetric flow is determined, this is a sign that the person is breathing spontaneously. Furthermore, it can be established whether the respiratory air supplied by the aider is sufficient to terminate the respiratory arrest.
If cardiac massage is administered, the thorax of the person is compressed by applying pressure. After the pressure is released, decompression takes place.
The thorax expands again. This process is constantly repeated. When the thorax is compressed, the person's heart and lungs in particular are compressed. To a limited extent this supports a circulation of the blood to vital organs, in particular the person's brain. Compression of the lungs results in air flowing out of the nose or mouth of the person, provided the person's airways are not obstructed. If no mass or volumetric flow from the person is indicated in a cardiac massage during compression of the person's thorax, this is therefore a sign that the person's airways are obstructed. This applies in particular if no mass or volumetric flow is registered despite an increase in penetration depth in i 20138775-3-PCT/ 13.05.2014/ sl
- 5 -, , = the cardiac massage. The airways may be obstructed by the person's tongue or by vomit.
The device is equipped with a processor and an output device. The mass or volumetric flow registered by the flow sensor is processed in the processor.
The signals of the flow sensor are processed to that end. An output signal that is emitted by the output device is generated.
- 6 -An aider thus receives assistance in administering first aid. The first aid can be adapted optimally to the needs of the person. In this way, inhibitions in potential aiders can be overcome.
- 7 According to an advantageous embodiment of the invention, at least one further sensor is provided on the flow tube to determine parameters of the airflow and/or of the gases contained in the flowing air. The parameters represent in particular physical or chemical properties of the gases. These include for example:
airway pressure relative to the surroundings, ambient pressure, - pressure difference, temperature, - humidity, oxygen content or oxygen concentration, - carbon dioxide content or carbon dioxide concentration.
The sensor or sensors are designed to determine the above parameters. The parameters such as respiratory flow, pressure difference, oxygen or carbon dioxide concentration are also referred to as vital signs of the person.
Sensors that determine the above parameters are therefore also referred to as vital signs sensors.
Oxygen is converted into carbon dioxide in the person's lungs. This conversion also occurs during respiration or a cardiac massage if the person is not breathing independently and has suffered circulatory arrest. Therefore, if the sensor demonstrates that the carbon dioxide concentration in the air flowing out of the person is greater than the air supplied to the person, this is an indication 20138775-3-PCT/ 13.05.2014/ sl
- 8 -= that the air supplied by artificial respiration or cardiac massage has reached the person's lungs. A corresponding confirmation of a carbon dioxide content or a carbon dioxide concentration can therefore also provide information about artificial respiration or cardiac massage, and in particular about whether the measure in question meets the requirement for resuscitation.
According to a further advantageous embodiment of the invention, the optical display device exhibits a combination of several light sources. Suitable light sources include light-emitting diodes in different colors, for example. The different colors can represent different ranges of the mass or volumetric flow for the person measured with the flow sensor or a parameter derived therefrom.
For example, a first color can represent a mass or volumetric flow that is less than or equal to a specified minimum. A second color can represent a mass or volumetric flow that is greater than or equal to a specified maximum. A third color can represent a mass or volumetric flow that is between the minimum and the maximum. Different minimum and maximum values can be specified here for different groups of people, for example adults, children and infants.
These are preferably stored in a memory device in the device. In this case the device is preferably equipped with an input device for selection of the group of people to which the person in an emergency belongs.
- 9 -' According to a further advantageous embodiment of the invention, the optical display device exhibits an optically active surface on which the output signal is displayed. It is beneficial that this optically active surface is convex.
Alternatively, the surface can also take the form of an essentially flat surface. It is beneficial that the flat optically active surface is aligned at an angle of more than 0 and less than 90 to the longitudinal direction of the flow tube. The longitudinal direction of the flow tube here corresponds essentially to the direction of flow of the gases flowing through the flow tube. The curvature of the optically active surface or the angle of the optically active surface to the flow tube makes it easier for the aider to identify the output signal displayed on the display device while the device is fitted to the person in an emergency situation.
20138775-3-PCT/ 13.05.2014/ sl . - 10 -= According to a further advantageous embodiment, the device is equipped with an interface over which data concerning a mass or volumetric flow registered by the flow sensor or data derived therefrom can be emitted to an external device for emergency care, to a medical device or to a computer. The data can now be called up and is available for the subsequent care of the patient. A
paramedic, a doctor or a nurse can now swiftly and easily form an impression of the condition of the person and of what first aid has already been administered. The medical device may for example be a respirator or a defibrillator.
According to a further advantageous embodiment of the invention, there is a second filter disposed in the flow channel between the respiratory mask and the flow sensor. In exactly the same way as the first filter, it promotes the flow of the air or the air mixture through the flow tube along the sensor, with the objective of generating an ideally laminar flow. Furthermore, the second filter prevents the penetration of particles into the flow tube that could damage the flow sensor.
These include emissions by the person in a medical emergency situation. The second filter can for example consist of a plastic or metal lattice or mesh, in particular wire, of a nonwoven material or of a metal and/or plastic fabric.
According to a further advantageous embodiment of the invention, a third filter is arranged between the respiratory mask and the flow sensor to trap moisture in the air flowing out of the person, thus preventing the person's lungs from drying out excessively. This third filter can in addition trap emissions by the 20138775-3-PCT/ 13.05.2014/ sl =
= person. The third filter can for example consist of a plastic or metal lattice or mesh, in particular wire, of a nonwoven material or of a metal and/or plastic fabric.
According to a further advantageous embodiment of the invention, a sensor fixture device is arranged on one wall of the flow tube. The sensor fixture device extends at least partly into the flow channel of the flow tube. The flow sensor is arranged on the section of the sensor fixture device that extends into the flow 20138775-3-PCT/ 13.05.2014/ sl =
= channel. In this way, the flow sensor is secured to the flow tube in such a way that it extends into the gas flowing in the flow tube and reliably determines the mass and volumetric flow.
According to a further advantageous embodiment of the invention, the device is equipped with a push-on part in which the processor and the output device are arranged. Optionally, a storage device and one or more interfaces, as appropriate, are additionally arranged in the push-on part. The push-on part is connected detachably to the flow tube. It can be separated from the flow tube without the push-on part or the flow tube becoming damaged or destroyed. The push-on part exhibits a housing in which the processor and the output device are arranged in a well-protected manner. Because the push-on part does not come into contact with the patient and the respiratory air, it can be reused.
The flow tube, the mouthpiece and the respiratory mask can either be disposed of after use or cleaned, disinfected and reused.
20138775-3-PCT/ 13.05.2014/ sl = According to a further advantageous embodiment of the invention, the processor is designed such that it generates an output signal that can be emitted with the output device from the acceleration registered by the acceleration sensor.
According to a further advantageous embodiment of the invention, the device exhibits an input device via which certain characteristics of the person in a medical emergency situation may be input. Thus, the aider can for example select at the input device whether the person is an adult, a child or an infant.
The ranges specified for resuscitation differ between these groups of people, with the result that the aider can be informed accordingly.
20138775-3-PCT/ 13.05.2014/ sl The method according to the invention with the features of claim 15 is characterized in that with the help of the device after the respiratory mask has been fitted to a person in a medical emergency situation, the gases flowing out of the person that pass through the flow tube are registered by a flow sensor arranged in the flow tube. To that end the mass or volumetric flow of the gas flowing in the flow tube is registered. The mass or volumetric flow registered is processed into an output signal with the aid of the processor. The output signal is emitted by the output device.
According to a further advantageous embodiment of the invention, the gases flowing in the flow tube in both directions are registered by the flow sensor.
This means that not only is the mass or volumetric flow in the air flowing out of the person registered, but also the air supplied to the patient.
According to a further advantageous embodiment of the method according to the invention, the output device indicates whether the mass or volumetric flow 20138775-3-PCT/ 13.05.2014/ sl , = registered or the penetration depth signal derived from it or another parameter derived from the mass or volumetric flow lies within a specified range for resuscitation. The range is specified such that a circulation of the blood that provides a blood supply to the brain takes place within this range.
Drawing , 20138775-3-PCT/ 13.05.2014/ sl Model embodiments of the invention are represented in the drawing.
Figure 1 First model embodiment of a device for artificial respiration in emergencies in a side view, Figure 2 Device according to Figure 1 separated into its individual components, Figure 3 Flow tube with push-on part of the device according to Figure 1 in a perspective view, Figure 4 Flow tube with push-on part according to Figure 3 in a view from below, Figure 5 Flow tube according to Figure 3 with push-on part lifted off, Figure 6 Flow tube according to Figure 3 in an exploded view, Figure 7 Detail of Figure 6 showing the sensor, the sensor circuit board and the sensor sleeves, Figure 8 Push-on part according to Figure 3, Figure 9 Second model embodiment of a device for artificial respiration in emergencies in a front view, Figure 10 Device according to Figure 9 in a side view, Figure 11 Flow tube and push-on part of the device according to Figure 9 in a perspective view, !
20138775-3-PCT/ 13.05.2014/ sl =
Figure 12 Flow tube of the device according to Figure 9 in a perspective view, Figure 13 Push-on part of the device according to Figure 9 in a perspective view from above, Figure 14 Push-on part of the device according to Figure 9 in a perspective view from below, Figure 15 Push-on part of the device according to Figure 9 arranged on the arm of an aider.
Description of the model embodiments Figures 1 to 8 show a first model embodiment of a device for artificial respiration in emergencies. The device exhibits a respiratory mask 40, a mouthpiece 41, a flow tube 2 and a push-on part 3. The respiratory mask is equipped with an elastic edge 42 so that it forms an airtight seal on the face of the casualty or person in an emergency situation. The respiratory mask 40 is usually pressed onto the face of a person with a degree of pressure so that no air can escape under the edge. To fasten the respiratory mask to a person, there are straps 43, 44 arranged on two sides of the respiratory mask. The two straps 43, 44 are placed around the head of a person and connected. As a result, the respiratory mask and, with it, the entire device, is secured to a person.
Figures 3 to 8 represent the flow tube 2 with the push-on part 3 shown in Figures 1 and 2. The flow tube is an elongate hollow body. Its longitudinal axis 4 corresponds to the direction of flow of the air flowing through the flow tube.
On each of its ends the flow tube 2 exhibits one cylindrical end section 5, 6 with circular cross-sectional area. With these end sections 5, 6, one end of the flow 20138775-3-PCT/ 13.05.2014/ sl tube 2 is introduced into the respiratory mask 40 and the other end into the mouthpiece 41. The flow tube 2 is open at the first face end 7 and at the second face end 8. Other than that, the flow tube is essentially closed. There is a sensor section 9 of the flow tube 2 between the end sections 5, 6 with the circular cross section. A flow sensor 10 is arranged on the sensor section 9.
The attachment of the sensor 10 is discernible in Figure 6. The flow sensor 10 is equipped with a sensor fixture device 10a and a sensor circuit board 11. As well as the flow sensor 10, further sensors can be arranged on the sensor fixture device 10a. The sensor circuit board 11 forms an extension of the sensor fixture device 10a. The sensor fixture device 10a can also be part of the sensor circuit board 11. The sensor circuit board 11 is held by two sensor sleeves 12 and 13. The sensor sleeves are adapted to a sensor opening 14 in the sensor section 9. The sensor circuit board 11 is pressed into the sensor opening 14 with the help of the sensor sleeves 12 and 13, thus locating the flow sensor.
This clamps the sensor circuit board 11 between the two sensor sleeves 12, 13 and seals the sensor opening 14. The sensor now extends into the flow channel of the flow tube 2.
The sensor section 9 is limited by four side walls 15, 16, 17, 18. The two side walls 15 and 17 are flat and run at an angle of 5 to each other. The angle can also lie between 2 and 20 . The side wall 16 is likewise flat. It is adjacent to the two side walls 15 and 17. The fourth side wall 18 can likewise be flat or convex.
If the fourth side wall 18 is flat in design, it is preferably parallel to the side wall 16. The four side walls 15, 16, 17, 18 produce the form of a truncated pyramid.
The cross-section of the sensor section 9 is thus smaller at the end facing the cylindrical end section 5 of the flow tube 2 than at the end facing the cylindrical end section 6 of the flow tube 2. This is especially discernible in Figure 2.
Between the two ends, the cross-section decreases continuously perpendicular to the longitudinal axis of the flow tube 2. The cross-section increases continuously in the opposite direction.
20138775-3-PCT/ 13.05.2014/ sl A first filter 19 and a second filter 20 are discernible in Figure 6. They are arranged on the ends of the two end sections 5, 6 of the flow tube 2 that face the sensor section 9. The sensor section 9 is equipped at its two ends with sleeves 21, 22 that encompass the cylindrical end sections 5, 6.
The push-on part 3 exhibits a housing 23. The housing 23 has a U-shape. It encompasses the sensor section 9 of the flow tube 2 from three sides so that the flat side walls 15, 16 and 17 are entirely covered by the push-on part. To that end, the push-on part exhibits three corresponding, flat side walls 24, and 26 that rest on the side walls 15, 16 and 17. This is discernible in Figure 4 with regard to the side walls 24 and 26 of the push-on part 3 and with regard to the side walls 15 and 17 of the sensor section 9. The two opposing side walls 24 and 26 of the push-on part 3 create a clamping force with which the push-on part 3 is connected to the flow tube 2 when it is pushed on.
In the housing 23 of the push-on part 3 there are circuit boards 27 and 28 on which electrical and electronic components are arranged. These are in particular a memory device and a processor. In addition an analog-to-digital converter and a DC voltage source can be arranged on the circuit boards. A
connector socket not discernible in the drawing and into which the upper end of the circuit board 11 of the sensor 10 is inserted is arranged on the side wall 25.
The connector socket is connected to the circuit boards 27, 28. It forms the interface to the sensor 10. In addition a connector socket 29 that forms an interface with an external reader ¨ not represented in the drawing ¨ is arranged on the front side of the housing 23. A display device can in addition be integrated into a cover 30 of the housing 23.
20138775-3-PCT/ 13.05.2014/ sl To provide artificial respiration for a person in an emergency situation, the respiratory mask 40 is fitted over the nose and mouth of the person in an emergency situation and secured to the head of the person in an emergency situation with the straps 43, 44. The sensor is either already activated or is specifically activated. It determines the gases flowing through the flow tube 2.
These gases are analyzed by the processor to obtain measured values. The processor matches the measured values up with a corresponding instruction that is stored in the storage device. This is displayed on the display device and emitted to the aider. The determination of the parameters for the gases flowing in the flow tube also continues during first aid. As a result, the instructions given to the aider during the course of first aid can be adapted continually to any changes in the condition of the person in an emergency situation.
Figures 9 to 15 show a second model embodiment of a device 101 for artificial respiration in emergencies. The device essentially corresponds to the first model embodiment with regard to the respiratory mask 40, mouthpiece 41 and flow tube 2. These components are therefore given the same reference numbers. The second model embodiment differs from the first model embodiment with regard to the push-on part 103. In a housing 123 of the push-on part 103 are arranged a processor not discernible in the drawing and an output device 124. They form an optical display device with several elongate light elements arranged parallel one above the other. The individual light elements exhibit light-emitting diodes in different colors. If only the bottom light element is switched on, no mass or volumetric flow is registered in the flow tube. If only the top light element is switched on, a maximum mass or volumetric flow is determined. The top and bottom light elements have different colors.
The light elements between them have a third color. They indicate a mass or volumetric flow between the minimum and the maximum. The symbols on the left next to the light elements are arranged on buttons or pushbuttons. They are part of an input device 125. The symbols stand for adult, child or infant. By operating a button, the aider enters the group of people to which the person in a 20138775-3-PCT/ 13.05.2014/ sl =
' medical emergency situation belongs. The maximum and minimum of the mass or volumetric flow of the air flowing out of the person and the penetration depth for cardiac massage differ between these three groups of people.
The surface of the push-on part 103 facing the viewer in Figure 9 is an optically active surface 126. The light elements of the output device 124 are integrated into this surface 126. This surface is convex. This is discernible in the side view according to Figure 10.
Figure 11 shows the flow tube 2 and the push-on part 103 in a perspective view.
Figure 12 shows the flow tube 2 with the two ends 5 and 6 and the sensor section 9. The description of the flow tube 2 of the first model embodiment otherwise applies.
The push-on part 103 is represented in the Figures 13 and 14. The recess 128 in the housing 123 in which the flow tube 2 is inserted is discernible in Figure 14.
Figure 15 shows the push-on part 103 that is arranged on an arm 129 of an aider. To that end, the push-on part 103 is fastened to the arm with an arm fastening device 130 in the form of a strap. An acceleration sensor not discernible in the drawing is arranged in the push-on part 103.
To measure the mass or volumetric flow of a person, the device 103 with the respiratory mask 40 is placed onto the mouth and nose of the person. Using the input device 125, it is selected which group of people the person belongs to.
The flow sensor in the flow tube determines the mass or volumetric flow of the I
- air flowing out of the person. The mass or volumetric flow registered is displayed with the output device 124. If the mass or volumetric flow is too low, the aider administers a cardiac massage. If necessary the aider supplies air via the mouthpiece 41. In the cardiac massage, the mass or volumetric flow of the air flowing out of the person is determined. If no mass or volumetric flow is identified even though the penetration depth is increased, this is a sign of obstructed airways. In this case the aider can remove the push-on part 103 from the flow tube 2 and fasten it to their arm with the help of the arm fastening device 130. The penetration depth is now registered with the help of the acceleration sensor integrated into the housing 123. If the airways are not obstructed, the mass or volumetric flow of the air flowing out of the person can be continuously registered with every compression of the person's thorax and displayed on the display device. The mass or volumetric flow is a measure of the penetration depth in the cardiac massage. The aider learns from the display device whether the penetration depth was too low, sufficient or too high. They can modify the penetration depth accordingly in the next compression.
i 20138775-3-PCT/ 13.05.2014/ sl Reference numbers 1 Device for artificial respiration in emergencies 2 Flow tube 3 Push-on part 4 Longitudinal axis 5 End of the flow tube 6 End of the flow tube 7 First face end of the flow tube 8 Second face end of the flow tube 9 Sensor section
10 Sensor 10a Sensor fixture device
29 Connector socket I
44 Strap 101 Device for artificial respiration in emergencies 103 Push-on part 123 Housing 124 Output device 125 Input device 126 Optically active surface 127 Handle element 128 Recess 129 Arm 130 Arm fastening device
1. Device for artificial respiration of a person in a medical emergency situation with a respiratory mask (40) which can be placed on the nose and mouth section of the person, with a mouthpiece (41), through which respiratory air can be supplied by an aider, with a flow tube (2) disposed between the respiratory mask (40) and the mouthpiece (41), which flow tube forms a continuous flow channel from the mouthpiece (41) to the respiratory mask (40), with at least one flow sensor (10) disposed in the flow channel of the flow tube (2), which sensor can determine a mass or volumetric flow of a gas flowing through the flow channel, with a processor that processes the mass or volumetric flow registered by the flow sensor (10) into an output signal, with an output device (124), which emits the output signal.
2. Device according to claim 1, characterized in that in addition to the flow sensor it is equipped with a vital signs sensor, by means of which a proportion of oxygen and carbon dioxide in the air flowing through the flow channel can be registered, and that the processor is designed to process the registered proportion of oxygen and carbon dioxide into an output signal, which is emitted by the output device.
3. Device according to claim 1 or 2, characterized in that the output device (124) exhibits an optical display device.
4. Device according to claim 3, characterized in that the optical display device exhibits an optically active surface (126) on which the output signal is displayed, that the optically active surface (126) is a convex surface or essentially a flat surface, and that the flat optically active surface includes an angle of more than 0° and less than 90° with the longitudinal direction of the flow tube (2), where the longitudinal direction essentially corre-sponds to the direction of flow of the gases flowing through the flow tube (2).
5. Device according to claim 3 or 4, characterized in that the optical display device exhibits several light-emitting diodes (LEDs).
6. Device according to one of the previous claims, characterized in that the output device has an acoustic output device.
7. Device according to one of the previous claims, characterized in that it is equipped with an interface over which data concerning a mass or volumet-ric flow registered by the flow sensor (10) or data derived therefrom can be emitted to an external device for emergency care, to a medical device, to a computer and/or to a mobile telecommunications device.
8. Device according to one of the previous claims, characterized in that a filter (19) is arranged in the flow channel between the mouthpiece (41) and the flow sensor (10) and/or a filter (20) in the flow channel between the respiratory mask (40) and the flow sensor (10).
9. Device according to one of the previous claims, characterized in that the processor is designed as a processor generating a penetration depth signal, which processor generates a characteristic penetration depth signal for the penetration depth from the mass or volumetric flow regis-tered by the flow sensor (10) during a cardiac massage as a result of a compression of the thorax down to a penetration depth, for air flowing out of the nose and/or mouth of the person and through the flow channel, and that the output device (124) is designed to emit the penetration depth signal.
10. Device according to claim 9, characterized in that the output device (124) is designed to indicate whether the mass or volumetric flow registered or the penetration depth signal derived from it or another parameter derived from the mass or volumetric flow lies within a specified range for resuscita-tion.
11. Device according to one of the previous claims, characterized in that it is equipped with a push-on part (3, 103) that can be connected detachably to the flow tube (2), and that the processor and the output device (124) are arranged in the push-on part (3, 103).
12. Device according to claim 11, characterized in that the push-on part (103) exhibits an arm fastening device (130) with which it can be fastened to an arm of an aider, and that the push-on part (103) exhibits an acceleration sensor, which registers an acceleration of the arm during a cardiac massage.
13. Device according to claim 12, characterized in that the processor is designed to generate an output signal from the acceleration registered by the acceleration signal, which output signal can be emitted by the output device (124).
14 Device according to one of the previous claims, characterized in that it exhibits an additional second vital signs sensor that registers the pressure difference in the flow channel as a vital sign of the person.
15 Method for artificial respiration of a person in a medical emergency situation, comprising a respiratory mask (40), a mouthpiece (41), a flow tube (2) connecting the mouthpiece (41) with the respiratory mask (40), a flow sensor (10) arranged on the flow tube (2), a processor and an output device (124), characterized by the following process steps:
the respiratory mask (40) is fitted onto the nose and mouth section of the person, a mass or volumetric flow of a gas flowing through the flow tube (2) is registered by the flow sensor (10), the mass or volumetric flow registered by the flow sensor (10) is pro-cessed by the processor to obtain an output signal, the output signal is emitted by the output device (124).
16. Method according to claim 15, characterized in that a proportion of oxygen and carbon dioxide in the air flowing through the flow tube is registered by means of an additional vital signs sensor, that the proportion of oxygen and carbon dioxide registered is processed into an output signal and that the output signal is emitted by the output device.
17. Method according to claim 15, characterized in that the flow sensor (10) registers a mass or volumetric flow for the air flowing out of the nose and/or mouth of the person and through the flow tube (2) as a result of compression of the thorax down to a penetration depth and then decom-pression of the thorax, that a characteristic penetration depth signal for the penetration depth is generated by the processor from the mass or volu-metric flow registered, and that the penetration depth signal is emitted by the output device (124).
18. Device according to claim 17, characterized in that the output device (124) indicates whether the mass or volumetric flow registered or the penetration depth signal derived from it or another parameter derived from the mass or volumetric flow lies within a specified range for resuscitation.
19. Method according to one of the previous claims 15 to 18, characterized in that the mass or volumetric flow of the air flowing out of the nose and/or mouth of the person is registered by means of the flow sensor (10) before a cardiac massage starts, and that it is emitted by the output device whether the mass or volumetric flow registered is within a specified range for spontaneous breathing.
20. Method according to claim 17, 18 or 19, characterized in that the acceleration with which the thorax is compressed is registered by means of an acceleration sensor during compression of the thorax, that a charac-teristic penetration depth signal for the penetration depth is generated from the acceleration determined, that the penetration depth signal is emitted by means of the output device and that it is indicated by the output device whether the acceleration registered or the penetration depth signal derived from it or another parameter derived from the acceleration lies within a specified range for resuscitation.
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