# The Use of Virtual Reality in Training Parameters for a Mass Casualty Incident
## 5 Virtual Scenario \"Car Accident\"  
In addition to the Rozvadov 2018 exercise, several other real-life scenarios were the inspiration for the creation of the environment for the paramedic exercise, which enhance the experience and immersion for the individual user. Information about the structure of these exercises was obtained through semi-structured interviews with paramedics and representatives of the middle management of the Medical Rescue Service of the Pilsen Region, who are responsible for the preparation and implementation of the training. The design of the application is created in such a way that the user can run the module without external help. The reason for creating this module was so that anyone can run the training part and go through the training at any time. They do not need further assistance and it is up to them when and how many times they try the module. Now, the car crash module is fully prepared for further testing and later implementation into the training of paramedics and refresher training of professional paramedics. The introductory environment is also used as a transitional environment where the user has the space to adjust their goggles and begin to fully focus on virtual reality and their future training. It is, therefore, important that no pressure is put on the user, no distractions are introduced, and that the user has sufficient time to prepare for future training. The control scene environment is shown in Figure 2.  
The garage for the ambulance was chosen as the basic scene (see Figure 2). The individual module buttons are positioned in a corner on the wall to make them easily visible and clear. The simulation is controlled using standard controllers. The term \"button\" refers to the button on the corresponding controller that the paramedic presses. On the right side there is an avatar that gives information about the selected module. This type was chosen as a neutral ground for paramedics, where they have enough peace of mind to orient themselves in the environment and fully focus on virtual reality training. The option to select a module is shown in Figure 3.  
The only interactive elements are the ones in the corner that are used to select the project. Other models like the ambulance, gate, table, and rescue bag are inserted here for aesthetic reasons. They are meant to bring the users as close as possible to the environment they are in and to indicate what they are about to encounter. The user, by putting their  
Figure 3: Option to select a module. Figure 2: Control scene. hand with the controller and pressing the confirmation button, selects the module he wants to go through. This launches the basic information about the module. The selected module, in this case car accident, is coloured green so that the user knows which part he/she has selected. An avatar (see Figure 4), designed as a paramedic, guides the user through the training part. This is a virtual trainer who helps the user through the training, warns him/her which parts to watch out for and, when a mistake is made, advises him/her on how to perform the procedure correctly. For this type of scene, the avatar acts as a mentor in scene selection. After the user selects a module, the avatar will announce all the information about the selected training. It also outlines the situation and the setting to which the user will be transferred. The last part of the scene selection is the start button (see Figure 5), which is opposite the avatar from the layout view (i.e., to the right of the module selection). Again, it is inserted on the wall at eye level to be clearly visible to the user. In terms of more prominent handling, the green colour was chosen to ensure that the start button does not blend in with the wall. This step ends the possible module selection, and the user is already moved to the selected situation together with the avatar. The prepared module focuses on a car accident scenario. The scene is set in the suburbs in the evening.