Implementation of and Electrical Bioimpedance Measurement System for Renal Function Monitoring

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Peritoneal Dialysis is a treatment for patients suffering from renal failure that allows out-patient care. This means that the patient only needs to visit the hospital for consultation and not for treatment, increasing considerably the comfort of the patient, while reducing remarkably the cost per patient. In order to increase the level of medical supervision obtained with the periodic visits to the clinic, televisit has been put into practice in some hospitals. But these televisits are based on indirect and qualitative indicators of renal failure, and therefore they are just valid for detection of situations near limit cases, such as well over-hydrated or dehydrated. Electrical Bioimpedance Measurements have been proved to constitute an appropriate method for assessment of body composition, and therefore they can provide with direct indicators of body fluid distribution. Such ability of EBI technology allows the detection of body fluid unbalance caused by renal dysfunction, and therefore, nephrology televisits would benefit tremendously from EBI measurements. This project is based on the AD5933 Impedance Network Analyzer of Analog Devices, and the main task is to develop a software application that controls the evaluation board in which it is implemented, and allows the storage of the EBI measurements in EDF+ files that will facilitate the management of medical data when applied to televisit. Th...