We have developed a tele-rehabilitation application for training cardiac patients. It uses a modified ergometer bicycle with a set of wireless sensors. While the patient is exercising, the ECG, blood pressure and oxygen-saturation are monitored constantly and automatically. If sensor values exceed pre-defined thresholds, the patient receives an alarm. As a result the training will either be stopped or continued at a reduced load, depending on the severity of the alarm. To measure user acceptance, we introduced the system to 13 members of staff and four patients, who trained on the system every day during their stay in hospital. A total of 39 training sessions were completed. In 27% of the exercise sessions an ECG connection could not be established and in 23%, blood pressure measurement failed. However, there were no failures to measure oxygen saturation. The overall acceptance of the patient's graphical user interface (GUI) was excellent. The doctor's GUI with its functions received an overall score of 1.5 on a scale of 1 to 4 (usefulness 1.6, usability 1.3 and operability 1.6). The SAPHIRE tele-rehabilitation system operated properly and was well accepted by patients and doctors.

In this paper conceptions and architectural considerations of the OSAMI project and their specializations towards the requirements of the e-health domain by the German subproject (OSAMI-D) are described. Along with the expected shift of healthcare service between stationary towards ambulatory care, a standardized way of integrating medical data acquired at home into the IT infrastructure of hospitals and the synchronization with medical workflows have to be implemented. Therefore, the OSAMI-D project will provide open source components that implement the required interfaces. Preliminary results of the requirements analysis and the implementation of first domain-specific services are presented. These services are used to realize two home care scenarios, which support ambulant cardiologic rehabilitation (indoor and outdoor). Special emphasis is placed on standards and formats for the communication and storage of patient data.

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We present the design of context aware user interfaces for a tele-medical application. The system that is going to be developed within an European research project addresses patients with cardiac diseases who had undergone rehabilitation phase II. It enables them to exercise at home or to exercise mobile while being supervised by a doctor either live or during a post-processing. Therefore we analyzed the needs and requirements of supervisors with the goal to create minimal-attention user interfaces that provide a good usability. The process of the analysis, the most important results and the design approaches for the system are presented in this paper.

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