Real-time guidance for cardiopulmonary resuscitation in Mixed Reality Danilo Gasques Rodrigues Dept. of Computer Science and Engineering University of California, San Diego La Jolla, CA, 92037, USA gasques@ucsd.edu Janet G. Johnson Dept. of Computer Science and Engineering University of California, San Diego La Jolla, CA, 92037, USA jgj007@ucsd.edu Nadir Weibel Dept. of Computer Science and Engineering University of California, San Diego La Jolla, CA, 92037, USA weibel@ucsd.edu Figure 1: HoloCPR in Action. (a-b) As soon as the simulation manikin heart’s stops beating, the user looks at it to find spatially localized information of what he needs to do anchored where it he needs to perform it. (c-d) Wearer is performing chest compressions while seeing the instructions in place. ABSTRACT Cardiopulmonary Resuscitation (CPR) is a life-saving pro- cedure that gives a cardiac arrest victim a second chance. The application window is short as the chances of survival falls drastically with every minute without resuscitation. Out- ofhospital cardiac arrests are even riskier, as the state of victim worsens while waiting for specialized medical personnel. CPR is simple and composed of few steps, with instructions widely available in First Aid Kits or online. Nonetheless, it is usu- ally not performed by most bystanders as they fear to harm the victim by its incorrect application. Recently, the intro- duction of Mixed Reality (MR) devices such as Microsoft HoloLens enabled the development of systems that leverage contextual information such as the location of the victim to display guiding information where it should be performed, thereby allowing bystanders to focus on the task at hand. In this demo, we present HoloCPR, a Mixed Reality application that provides real-time instructions for performing CPR. ACM Classification Keywords H.5.m Information interfaces and presentation (e.g., HCI) Author Keywords Mixed Reality, Augmented Reality, HoloLens, CPR, Checklists, User-Centered Design INTRODUCTION AND MOTIVATION In the event of an out-of-hospital cardiac arrest, performing cardiopulmonary resuscitation (CPR) immediately after the victim collapses is critical for his or her survival. It often can take 8 minutes or longer for medical personnel to arrive on the scene. Since the chances of survival fall by 7-10% for every minute without resuscitation, bystander-initiated CPR has the potential to save lives. Bystanders are people that happen to be around the victim in the event of a sudden cardiac arrest. They are most likely not trained medical professionals and have to rely on past training or their knowledge to help the victim. Although it has been shown that bystander-initiated CPR can double or triple survival rates [3], only 30-40% [4] of bystanders administer CPR. Factors such as fear of harming the victim or panic influences their readiness to act despite prior training[1]. In an effort to encourage bystander-CPR, first-aid kits often provide manuals that aid performing CPR by providing step- by-step instructions. Alternatively, bystanders can use a mo- bile phone to provide guidance. Despite making CPR instruc- PervasiveHealth (Demos, Posters, Doctoral Colloquium) 2018, April 20-21 Copyright © 2018 EAI DOI 10.4108/eai.20-4-2018.2276450