Hospital information systems: chances and obstacles on the way to integration.

Today, most large hospital information systems (HIS) comprise many heterogeneous application systems, loosely coupled via interfaces. Integration could offer many advantages, like the support of interdepartmental workflows or a consistent patient record. This cannot be achieved, however, by simply interfacing originally unrelated component systems. In this paper, we present relevant concepts of integration, the autonomy/consistency tradeoff, and technical alternatives in some detail. Based on our recent experiences in analyzing an existing HIS and selecting adequate vendors for the needs of our 1250-bed hospital, we then discuss strategies and tradeoffs on the way to a HIS that utilizes state-of-the-art technology to fill the users' needs.