Impact of UI design patterns on cognitive load, perceived usability, and confidence to use critical healthcare devices

Literature indicates that approximately 50% of adverse ventilator events are caused by user errors. A clear and well-organised interface can reduce cognitive complexity, improve usability perception, help prevent errors, and ultimately build user confidence.

This study explores the categorical role of design elements such as aesthetic graphics, font, color, gestalt, transition, hierarchy, control, interactivity, and animation in enhancing the perception of system usability. An experimental prototype of the next-generation intelligent ICU ventilator was developed with minor variations using a participatory design approach to conduct experimentation. A questionnaire was administered to 535 healthcare practitioners (i.e. doctors, nurses, medical students, & caregivers) to gather feedback and corroborate the proposed research model and hypotheses.