Mobile App Support for Cardiopulmonary Resuscitation: Development and Usability Study.

The study provides recommendations to developers on the user requirements that need to be addressed when developing CPR support apps. Three features (one-dimensional attributes) must be incorporated in an in-hospital CPR support app: reminder of rhythm check, reminder of resuscitation drugs, and differentiate between adults and children. In addition, 5 features (attractive attributes) would result in higher user satisfaction: all functions on one side, access to the patient journal in the app, automatic time recording when cardiac arrest is called, sound to guide the chest compression rate (metronome), and send CPR history to the DANARREST(Danish in-hospital cardiac arrest registry) database.