This article reports the results of a case study of the consequences of mobile device use for the work practices of operating room nurses. The study identifies different patterns of mobile technology use by operating room nurses, including both work-related and non-work-related use. These patterns have multiple consequences for nurses, such as improvements in information access, e-learning and work-related communication, as well as a perceived increase in distractions from the collaborative work. We conceptualize these consequences in terms of three level effects and explain how we find both positive and negative consequences on the third level. On the positive side, improvements were found in how nurses spent their unoccupied time during the stable parts of operations, contributing to their well-being and job satisfaction. A negative consequence was the perceived increase in distraction from the collaborative operating room work practices.