© 2016, Japan Soc. of Med. Electronics and Biol. Engineering. All rights reserved. Although the most of the modern medical instruments has been computerized, they are not connected to hospital information systems. As a result, clinical recording still heavily relied on manpower. In this research, we attempt to connect medical instruments to a hospital information system. Once it is connected, detailed medical record can be obtained without increasing the workloads of clinicians. We selected infusion pump and syringe drivers as the examples of such medical devices. Connecting such devices enables the hospital information systems to watch detailed settings and statuses of the devices and to inform errors to clinicians. In this paper, we discuss preferable way to inform collected errors through interview with nurses.