US Patent 7827148 Medical equipment having audit log managing function

A log file generating section generates an audit log file of patient information in response to various kinds of events generated in a medical equipment, and a file compressing section compresses the generated file in a local storage medium at a predetermined timing. Further, a log management section automatically transfers the compressed audit log file to an external storage device and deletes data in the local storage medium at a predetermined timing, e.g., when a remaining capacity in the local storage medium exceeds a limit value.