First responder alerting system and procedure for optimizing the alerting and dispatch of first responders in emergencies

Abstract

The invention relates to an app-based first responder alerting system and a method for optimizing the alerting and dispatching of first responders in emergencies, particularly in cardiac arrests. It coordinates registered first responders based on predicted arrival times at the emergency scene. Location and transportation data are used to determine or anticipate arrival times based on the first responders' individual travel and response times. The first responder alerting system assigns specific emergency tasks to the first responders. This significantly shortens the time until life-saving measures can be initiated, increasing the chances of survival and enhancing the efficiency of emergency assistance.

Description

[0001] The invention relates to an app-based first responder alerting system and a method for optimizing the alerting and dispatching of first responders in emergencies, particularly in cases of sudden cardiac arrest. It aims to ensure rapid and effective resuscitation through targeted assignment of emergency tasks.

[0002] Sudden cardiac arrest is one of the most common causes of death in industrialized nations. Survival without permanent damage is only likely if resuscitation measures, i.e., chest compressions and ventilation, are initiated within three to five minutes. In approximately 25% of cases, a cardiac arrhythmia, such as ventricular fibrillation or ventricular tachycardia, is also present. Such cardiac arrhythmias can be treated with defibrillation. With every minute of delay before defibrillation, the patient's probability of survival decreases, which is why international guidelines recommend that defibrillation be performed before the arrival of emergency services.

[0003] A rapid response to medical emergencies such as cardiac arrest is crucial for the victims' chances of survival. First responder alert systems play an important role in this by alerting volunteer first responders via digital applications, so-called first responder apps, and directing them to the emergency scene.

[0004] Since 2021, international guidelines for resuscitation have recommended that, upon receipt of an emergency call concerning suspected cardiac arrest, the dispatch center locates and alerts volunteer first responders via a smartphone-based first responder app. The alerted first responders should be directed to the scene of the emergency as quickly as possible and bridge the time until emergency services arrive.

[0005] Common app-based first responder alert systems use GPS positioning to alert first responders near an emergency scene. They primarily rely on the physical distance to the emergency scene to notify volunteer first responders.

[0006] Many first responder alert systems are also linked to databases that list the locations of publicly accessible defibrillators (Automated External Defibrillators, AEDs). Linking to such AED location databases or AED registries allows first responders to be directed to public AED locations when no AED is available at the emergency scene. Some first responder alert systems already have an automated function that directs first responders who do not carry an AED to public AEDs.

[0007] The first responder alerting system "Region der Lebensretter" (Region of Lifesavers), known from Ganter, J., et al., "Implementation Process of a Smartphone-Based First Responder Alert," Notfall+Rettungsmedizin 25, 177-185 (2022), works with a first responder app connected to an alarm server (backend). The first responder alerting system is also linked to an AED location database. The first responder alert follows an alerting algorithm that aims to keep the time from the alarm to the arrival of the first responder at the emergency scene as short as possible. Furthermore, an AED should be available to the patient as quickly as possible.

[0008] The aforementioned first responder alert system assigns each alerted first responder an emergency task, for example, "go to the patient and perform CPR" or "fetch an AED." When alerting volunteer first responders, only those first responders should be alerted and directed to the patient if they can arrive before the emergency services. Likewise, the emergency task assigned to a first responder—picking up an AED from a public AED location and bringing it to the emergency scene—should only be assigned if none of the first responders carries a personal AED and the journey to the AED location and then to the emergency scene can be completed in less time than the estimated arrival time of the emergency services at the emergency scene.

[0009] In the first responder alerting system “Region of Lifesavers” known from Ganter, J., et al., “Implementation process of a smartphone-based first responder alerting”, Notfall+Rettungsmedizin 25, 177-185 (2022), the alerting process is as follows: The first responder alerting system is initially activated by an emergency message transmitted from the operations control system of the responsible control center to the alarm server of the first responder alerting system, stating the location of the emergency and the estimated arrival time of the emergency services. The alarm server then locates the registered first responders using the first responders' mobile devices and the first responder apps running on them. For each first responder, the travel time from the first responder's current location at the time of the emergency message, the so-called alarm location, to the emergency location is calculated, assuming the journey was made by car. If this travel time is less than the travel time of the rescue service alerted by the control center, i.e. the ambulance or emergency doctor, the first responders near the emergency location are pre-alerted. This pre-alerting is done via the first responder app.The first responder uses the first responder app to indicate whether they are available, i.e., accepting the pre-alarm, or unavailable. They can also indicate which mode of transport they would use to reach the emergency site, for example, on foot, by bicycle, or by car, and whether they are carrying an AED. The first responder alert system then calculates an individual route from the first responder's alert location to the emergency site. If the first responder cannot reach the emergency site before the emergency services, the first responder will not be assigned an emergency task or will be assigned a "call cancellation."

[0010] After a defined, configurable waiting time, for example, 20 seconds, the first responder alert system calculates an individual travel time for all available first responders. This time is the time from leaving the current location upon receipt of the emergency notification (i.e., the alert location) to the emergency scene, taking into account the selected mode of transport. The two first responders with the shortest travel time are then routed directly to the emergency scene to perform CPR, i.e., cardiac massage and ventilation. These two first responders are therefore assigned the emergency task "Resuscitation."

[0011] For each of the remaining first responders, a route is calculated using possible AED locations to the emergency scene. This is not necessary if one of the first responders already deployed is carrying an AED. If the shortest AED travel time calculated by the first responder alert system—i.e., the travel time for the first responder to reach the emergency scene via the AED location—is shorter than the arrival time of the emergency services, the AED is displayed to the relevant first responder in the first responder app. The selected first responder is then first directed to the AED location and, after picking up the AED, to the emergency scene. The selected first responder is then assigned the emergency task of "AED deployment."If none of the alerted first responders is carrying an AED and, according to the alarm server's calculations, none of the other available first responders will reach the emergency scene before the emergency services, the emergency task of picking up a publicly available AED and transporting it to the emergency scene will not be assigned.

[0012] The first responder alert system can assign the emergency task of "emergency medical services briefing" to one of the pre-alerted first responders who is not assigned the emergency task of "resuscitation." This first responder can assist, for example, in ensuring that the emergency services reach the emergency scene as quickly as possible. Another emergency task could be "emergency site security"; the first responder is assigned the emergency task of securing the emergency scene and eliminating any hazards for patients and the resuscitation-providing first responders.

[0013] Current first responder alerting systems are based on the allocation of emergency tasks based on travel time. However, this time represents only a portion of the total time elapsed from the alarm being raised (i.e., the emergency notification) to reaching the emergency location. This total time, from receipt of the emergency notification to the arrival of the first responder, referred to below as the arrival time, is comprised of a system-specific response time (i.e., the time from the emergency notification to the allocation of the emergency task), a response time specific to each first responder (i.e., the time from the allocation of the emergency task to leaving the alert location), and the travel time specific to each first responder.

[0014] The arrival times of first responders alerted via the "Region der Lebensretter" (Region of Lifesavers) first responder alerting system described in Ganter, J., et al., "Implementation process of a smartphone-based first responder alerting," Notfall+Rettungsmedizin 25, 177-185 (2022), are typically four to five minutes. The travel or transit time is often two to three minutes. If the unavoidable, system-related response time is neglected, approximately half of the arrival time is spent on the first responder's response time. However, the response time is not, or only inadequately, taken into account in existing first responder alerting systems.

[0015] DE 10 2015 201 270 B4 describes a system for alerting emergency services in the event of an emergency. This system uses a central server connected to mobile devices assigned to the individual emergency services. In the event of an emergency call, the server sends an alarm signal to at least some of these mobile devices. This signal contains information about the location of the incident or a staging point. The mobile devices confirm receipt of the alarm signal by sending a response back to the server. The server then uses current traffic data to calculate so-called isochrones - these are areas that can be reached from the location of the incident or staging point within a specific time. The mobile devices can retrieve this information from the server. Based on the current location and the isochrones, the estimated arrival time of the respective emergency service member is then calculated and reported back to the server.

[0016] DE 10 2021 129 885 A1 discloses a computer-implemented method for managing digital information exchange in connection with rescue operations. The method is integrated into an electronic organizational system and enables the structured communication of relevant mission data. Furthermore, the publication concerns a method for coordinating emergency physicians available in an emergency physician pool, whereby the system enables the targeted selection and assignment of suitable emergency physicians to the scene of the incident.

[0017] Against this background, the objective of the invention is to optimize the alerting and dispatch of first responders so that they arrive at the emergency scene as quickly and accurately as possible. Furthermore, the system should be able to determine in real time whether and when an AED is needed and adjust the emergency task allocation to first responders accordingly.

[0018] This object is achieved by a first responder alerting system having the features of claim 1 and a method for optimizing the alerting and dispatch of first responders in emergencies according to claim 6. Appropriate further developments of the invention are listed in claims 2 to 5 and 7 to 10.

[0019] The proposed first responder alerting system and the associated procedure for optimizing the alerting and dispatch of first responders in emergencies are based on the first responder alerting system "Region of Lifesavers" described in Ganter, J., et al., "Implementation process of a smartphone-based first responder alerting," Notfall+Rettungsmedizin 25, 177-185 (2022).

[0020] The first responder alerting system according to the invention serves to optimize the alerting and dispatch of registered first responders in emergencies. It comprises an alarm server that manages the data of the registered first responders and coordinates the alerting. The alarm server is equipped with an interface that enables connection to an emergency services dispatch system. The first responder alerting system includes several mobile devices assigned to the registered first responders, which are equipped with a location tracking function to determine the location data of the respective first responders. The mobile devices can be, for example, smartphones, tablets, smartwatches, laptops, or wearables. A digital application, the so-called first responder app, is installed on the mobile devices. This first responder app is used to transmit the location data to the alarm server, to communicate with the first responders, and to coordinate their operations.

[0021] The alarm server is configured to receive an incoming emergency message from the incident control system, including the location of the emergency and the estimated arrival time of the emergency services at the emergency site, locate the first responders located at an alert location near the emergency site, send a pre-alarm to a pre-selected number of first responders based on the proximity of their alert location to the emergency site, and assign an emergency task, such as "resuscitation," "AED deployment," "emergency site security," "emergency service briefing," or "call off mission," to those first responders who acknowledge the pre-alarm. The alert location is understood to be the current location of the respective first responder upon receipt of the emergency message; the location data therefore includes at least the data on the alert location.

[0022] The first responder app is configured to record transport data for the means of transport used by the pre-alerted first responder to travel to the emergency site and transmit this data to the alarm server. Based on the location and transport data, the alarm server calculates an individual estimated travel time from the alert location to the emergency site by individually calculating the route. It also predicts an individual arrival time at the emergency site for each first responder. This time is comprised of a predefined system-specific response time (from the pre-alertion to the assignment of the emergency task), the individual departure time (from the assignment of the emergency task to leaving the alert location), and the individual estimated travel time. The assignment of the emergency task is ultimately based on the individual predicted arrival time of the first responders.

[0023] The inventive method for optimizing the alerting and dispatching of registered first responders in emergencies, which can be carried out or is carried out using the described first responder alerting system, comprises the following process steps carried out after an emergency notification: First, the registered first responders are located near the emergency site. A pre-alarm is then sent to a pre-selected number of first responders depending on the proximity of their alert location to the emergency site. The pre-alarmed first responders confirm the pre-alarm if available. In the next step, the transport data of the pre-alarmed first responders is recorded. Based on the location data and the transport data, the individual estimated travel time is determined for each first responder through individual route calculation. The individual response time is then anticipated for each first responder.The predicted arrival time of each first responder is calculated from the sum of the predetermined, system-based response time, the anticipated individual dispatch time, and the determined individual estimated travel time. Finally, the emergency task is assigned to the first responders who confirmed the pre-alarm, depending on each first responder's individual predicted arrival time.

[0024] The described first responder alerting system and the associated procedure offer significant advantages with regard to alerting and dispatching first responders in emergencies. The first responder alerting system shortens the time to commence resuscitation by locating first responders near the emergency scene, taking into account both location and transport data. This enables optimal selection of the first responders who can reach the emergency scene most quickly. The individual arrival time forecast, taking into account the travel time for each mode of transport and the anticipated response time, increases the precision of operational planning and ensures the efficient distribution of available resources. At the same time, targeted alerting prevents unavailable or less relevant first responders from being unnecessarily alerted, thus increasing the overall efficiency of the first responder alerting system.

[0025] Real-time communication and deployment coordination via the first responder app facilitate the execution of deployments. Systematic anticipation of response times minimizes delays between the alert and the actual deployment of first responders. Furthermore, the more realistic calculation of the estimated travel time enables even better deployment planning, significantly reducing the time it takes for first responders to arrive at the scene. This precise and resource-efficient approach contributes significantly to maximizing the effectiveness of emergency response, saving lives, and reducing the organizational effort required during emergency operations.

[0026] To anticipate the response time, the proposed first responder alerting system can be configured so that the location data determined using the location tracking function of the first responders' mobile devices also includes data on the precision of the location determination. For example, if the mobile device is a smartphone, the precision data can include information such as the smartphone's GPS precision. Low GPS precision generally indicates that the smartphone is located indoors, while high GPS precision usually indicates that the smartphone is outdoors. In the latter case, a short response time for the first responder can be assumed. Therefore, the higher the precision of the location data, the shorter the response times can be anticipated.Predefined, experience-based release times can be assigned to a specific location precision, for example a typical release time when leaving a building.

[0027] In addition, the determination of typical response times can be integrated into the proposed first responder alerting system. By using GPS and variable geofence technology, the first responder alerting system can determine the exact time at which a pre-alerted first responder leaves their alert location and begins to move, i.e., responds. The first responder alerting system sets a geofence around the coordinates of the first responder's alert location, which are determined when the pre-alarm is accepted. As soon as the first responder (or their mobile device) leaves this geofence, the time is automatically recorded and logged as the response time. The geofence radii can be adapted to different accuracy requirements in order to achieve optimal measurement results. This allows response times of first responders when alerted for various life situations to be obtained and stored in the first responder alerting system.

[0028] It can also be provided that the location data determined using the location tracking function of the first responders' mobile devices include time-resolved location data of the respective first responder. This means that the location data contains location data over a (short) period of time, for example, a few seconds after the emergency report. Movement data can be derived from the time-resolved location data, in particular the speed at which the first responder's mobile device is moving. First responders whose mobile device moves faster than walking pace can probably drive to the scene of the incident very quickly or directly. In such cases, a very short response time can be anticipated, i.e., the response time can be set to 0 minutes, for example.

[0029] Furthermore, the first responder app can be configured to transmit focus mode data relating to a focus mode set on the respective first responder's mobile device to the alarm server. The alarm server is then able to determine the first responder's response time based on the location data, the mode of transport data, and the focus mode data, and / or to determine the mode of transport data based on the focus mode data. Focus mode is a feature of mobile devices, particularly modern smartphones, that serves to reduce notifications and distractions based on specific scenarios or activities. For example, sleep mode mutes notifications and the smartphone only displays time-critical information to ensure undisturbed sleep. Quiet mode limits interruptions, for example, during meditation or relaxation.In driving mode, the focus is on using the smartphone for navigation and communication while driving, while other distractions are minimized. Work mode only allows access to work-related apps or contacts to promote concentration at work. In personal mode, work-related emails or messages are blocked so that the user can concentrate on leisure activities. Overall, focus mode helps to use the smartphone more efficiently and as needed, depending on the situation. To anticipate the response time, specific focus mode data is taken into account, which are indicators of a shorter or longer response time. This includes, for example, activated focus modes such as sleep mode, rest mode or driving mode. It is assumed that first responders whose mobile device (smartphone) is in driving mode or is wired or wirelessly connected will...Wirelessly connected to a vehicle, they can drive directly to the scene of the incident, so a very short response time—in practice, 0 minutes—can be expected. In contrast, first responders whose mobile device (smartphone) is in sleep or idle mode can expect a longer response time.

[0030] The recording of the means of transport used by the pre-alerted first responder to reach the emergency site can be done either manually by the first responder entering the information via the first responder app or automatically, for example based on movement data or focus mode data. The recording and consideration of the means of transport data enables a differentiated selection of first responders. For example, first responders who use a car can be prioritized if this leads to shorter arrival times. As a rule, the recording of the means of transport is done by the first responder manually entering the means of transport. When confirming the pre-alarm, the first responder simultaneously indicates which means of transport they will use to reach the emergency site, for example on foot, by bicycle, or by car.The first responder app is ideally set up to offer the first responder these three options: walking, cycling, and car, so that the means of transport can be quickly reported back to the alarm server. The recording of means of transport data can be supplemented or replaced by automatic functions, either additionally or alternatively. For example, the movement data can be used to predict which means of transport the first responder is likely to use. The focus mode data also allows automatic inferences to be drawn about the means of transport used. If the mobile device (smartphone) is in drive mode, the first responder alerting system can assume that the means of transport is a car. Such functions or additional functions may mean that the first responder is no longer required to provide the means of transport, or may only need to be confirmed.

[0031] According to one aspect of the method according to the invention, one or two of the first responders for whom the shortest arrival times are predicted (provided these predicted arrival times are shorter than the arrival time of the emergency services at the emergency scene) are assigned the emergency task of immediately performing first aid measures at the emergency scene, i.e., the emergency task "resuscitation." After being assigned this emergency task, these first responders are immediately and directly directed to the emergency scene via the first responder app.

[0032] The first responder alerting system according to the invention preferably integrates the availability and deployment of automated external defibrillators (AEDs) into the emergency response to expedite life-saving measures in the event of cardiac arrest. For this purpose, the alarm server can include an interface for connecting to an AED location database.

[0033] Within the scope of the inventive method for optimizing the alerting and dispatching of first responders in emergencies, first responders typically indicate whether they have an AED with them after receiving the pre-alarm along with their availability report. If no AED is available at the emergency scene and none of the first responders carries a personal AED, the first responder alerting system can use the AED location database to identify nearby public AED locations. First responders who offer the best combination of short travel time and rapid availability are specifically alerted and dispatched to retrieve an AED. The first responder alerting system calculates the arrival time required for the first responder to retrieve the AED and bring it to the emergency scene. This AED travel time is compared with the estimated arrival time of the emergency services to ensure that the AED arrives on site in time.This emergency task, "AED deployment," is assigned subordinately to the emergency task "resuscitation." This means that first responders with the shortest predicted arrival times are initially directed directly to the emergency scene to begin immediate first aid measures such as chest compressions. Nevertheless, in parallel with the resuscitation first responders, another first responder is dispatched to retrieve the AED (emergency task "AED deployment") if an AED is not already available at the emergency scene. The entire alerting and coordination chain occurs in real time, thus minimizing delays. This integration ensures that both qualified first responders and necessary resources, such as an AED, arrive at the emergency scene as quickly as possible. This increases the efficiency of the emergency response and significantly improves the patient's chances of survival.

[0034] The first responder alerting system preferably uses real-time calculation or real-time updating, which continuously adjusts based on feedback from first responders as well as updated location and movement data. This means that the first responder alerting system operates in real time and continuously adapts alerting and dispatch decisions based on the feedback and location and movement data of first responders. Dynamic optimization of the alerting process ensures that the first responders with the best arrival times and resources are always selected. This significantly increases the efficiency of the rescue chain.

[0035] In addition, the first responder alerting system uses continuous data analytics to improve the quality of future operations. It documents all location and incident data and records planned and actual times to identify patterns and continuously optimize the task allocation algorithm. This ensures a sustainable improvement in arrival times and the availability of life-saving measures in future emergencies.

[0036] The invention is explained below using an example of an emergency situation: A serious car accident occurs on a country road, causing a vehicle to leave the roadway and injuring several people. The emergency call is automatically triggered by the vehicle's eCall system and transmitted to the control center. The control center sends the coordinates of the accident or emergency location, the severity of the accident, and the estimated arrival time of the emergency services to the alarm server of the first responder alert system. The alarm server immediately begins locating and alerting available first responders in the vicinity.

[0037] Six registered first responders are identified, and their mobile devices transmit location data to the alarm server. The first responders are pre-alerted via the first responder app, assuming a car as the means of transport. Five of the first responders confirm their availability and communicate which means of transport they will actually use: The first first responder states that they will arrive by car, the second and third first responders will cycle, while the fourth and fifth first responders will walk. The sixth first responder reports themselves as unavailable. In addition, based on the location data and its low precision, the first responder alert system recognizes that the fifth first responder is likely inside a building. A response time of two minutes is anticipated for the fifth first responder. The response time is generally assumed to be "0," as this is usually negligible compared to the response time and travel time.

[0038] The alarm server calculates the estimated arrival times of the first responders, taking into account their mode of transport and their alarm locations. The first responder will reach the scene of the accident in approximately two minutes, the second responder in three minutes, the third responder in four minutes, the fourth responder in six minutes, and the fifth responder in ten minutes. None of the first responders has an AED with them. The alarm server then calculates the arrival times at the emergency scene for the third, fourth, and fifth responders, assuming a public AED is also procured. The shortest arrival time, including the provision of an AED, is determined for the third responder and is five minutes.

[0039] Based on this, the emergency tasks are distributed: The first responder is tasked with resuscitating an unconscious patient, while the second responder assists in this task. The third responder is tasked with retrieving an AED from a nearby location and transporting it to the emergency scene. The fourth responder is tasked with on-site coordination, including directing the emergency services, and securing the emergency scene. The fifth responder's call is canceled because the estimated arrival time of the emergency services is eight minutes, which is shorter than the fifth responder's arrival time.

[0040] The first responder is the first to arrive at the scene and immediately begins resuscitation of an unconscious victim. They check vital signs and perform CPR and rescue breathing. Shortly thereafter, the second responder arrives and assists with resuscitation. Meanwhile, the third responder retrieves the AED from a nearby location and brings it to the scene as quickly as possible, where they are immediately involved in resuscitation efforts. The AED is used to perform defibrillation if necessary.

[0041] The fourth first responder takes over coordination at the accident scene. They care for less seriously injured people, calm those involved in the accident, and keep bystanders away from the danger zone. They also make the necessary preparations to direct the emergency services. Once the emergency services arrive, the fourth first responder leads the rescue team to the accident scene and provides important information about the measures taken so far and the condition of the injured.

[0042] The emergency services take over patient care, while first responders stabilize the situation on site and complete their tasks. All measures taken and arrival times are documented by the alarm server to facilitate even more effective coordination of future operations. This example demonstrates how precise task allocation and real-time communication between first responders and the alarm server enable a rapid and effective emergency response, ensuring life-saving measures and optimally bridging the time until professional medical care arrives.

Claims

[1] First responder alerting system to optimise the alerting and dispatch of registered first responders in the event of an emergency, the first responder alerting system comprising: - an alarm server for managing data of registered first responders and coordinating the alarm, whereby the alarm server has an interface for connection to an emergency services command and control system, - several mobile devices assigned to the individual first responders of the first responder alert system with location tracking function for determining location data of the respective first responder, and - a digital application in the form of a first responder app that can be run on mobile devices to transmit the location data of the first responders to the alarm server, to communicate with the first responders and to coordinate the first responders, wherein the alarm server is configured to receive the emergency location and the expected arrival time of the emergency services at the emergency location upon receipt of an emergency message from the operations control system, to locate the first responders located at an alarm location near the emergency location, to send a pre-alarm to a pre-selected number of first responders depending on the proximity of their alarm location, and to assign an emergency task to the first responders who confirm the pre-alarm, characterized by , that the first aid app is further configured to record transport data for a means of transport used by the respective pre-alerted first aider to reach the emergency site and to transmit this data to the alarm server, The alarm server is further configured: - to determine an individual estimated travel time from the first responder's alert location to the emergency site based on the location data and the transport data, - to anticipate an individual response time for each first aider, based at least on the location data and the means of transport data, from the assignment of the emergency task to the first aider's departure from the alarm location, - to predict an individual arrival time at the emergency scene for each first responder from the sum of a system-dependent, predetermined reaction time ranging from the pre-alarm to the assignment of the emergency task, the individual response time and the individual estimated travel time, and - to allocate the emergency task to the first responders depending on the predicted individual arrival time. [2] First aid alert system according to claim 1, characterized bythat the location data determined using the location tracking function of the first responders' mobile devices includes data on the precision of the location determination. [3] First aid alert system according to claim 1 or 2, characterized by that the location data determined using the location tracking function of the first responders' mobile devices include time-resolved location data of the respective first responder. [4] First aid alarm system according to one of claims 1 to 3, characterized by that the first aid app is further configured to transmit focus mode data relating to a focus mode set on the mobile terminal device of the respective first aider to the alarm server, wherein the alarm server is further configured to determine the response time of the first aider based on the location data, the means of transport data and the focus mode data and / or to determine the means of transport data based on the focus mode data. [5] First aid alarm system according to one of claims 1 to 4, characterized by that the alarm server also includes an interface for connecting to an AED location database. [6] Method for optimising the alerting and dispatch of registered first responders in emergencies, carried out by means of a first responder alerting system according to one of claims 1 to 5, characterized by The following procedural steps are carried out after the emergency notification: - Locating registered first responders near the emergency site and collecting the location data of the first responders, - Sending a pre-alarm to a pre-selected number of first responders depending on the proximity of the alarm location to the emergency site, - Confirmation of the pre-alarm by the first responders if available, - Recording the transport data of the pre-alerted first responders, - Determine the estimated travel time of the respective first aider, - Anticipating the response time of the respective first aider based on the location data and the transport data, - Determining the predicted arrival time for each first aider as the sum of the predetermined, system-related reaction time, the individual response time anticipated for the first aider and the individual estimated travel time determined for the first aider, and - Assignment of the emergency task to the first responders who confirmed the pre-alarm, depending on the individual predicted arrival time of each first responder. [7] Method according to claim 6 by means of the first aid alert system according to claim 2, characterized by that shorter response times are anticipated the higher the precision of the location data. [8] Method according to claim 6 or 7, characterized bythat one or two of the first aiders for whom the shortest arrival times are forecast and, provided that these forecast arrival times are shorter than the arrival time of the emergency services at the emergency scene, are assigned the emergency task of immediately carrying out first aid measures at the emergency scene, whereby these first aiders are immediately directed to the emergency scene by means of the first aid app. [9] Method according to claim 8, carried out by means of the first aid alert system according to claim 5, characterized by that another first responder is dispatched to collect an AED if none of the first responders assigned to administer first aid already has an AED with them. [10] Method according to one of claims 6 to 9, characterized by that the release and travel times are systematically recorded and stored for system optimization.