Capacitive Sensor for Measuring of Intra-Abdominal Pressure

The article deals with the design of capacitive pressure sensor for automated measurement of intra-abdominal pressure by noninvasive method. Capacitive pressure sensor consists of a glass tube with evaporated thin film electrodes. The capacity change is given by the level change of displaced fluid in the tube. For capacitive sensors with different inner diameter of tubes were experimentally found calibration curves. Capacitive sensor is subpart of an automated measuring system for the clinical application of intra-abdominal pressure measurement.