This invention describes methods for processing pressure signals derivable from locations inside or outside a human or animal body or body cavity. The major aspect of the invention relates to methods for obtaining new and improved information from said pressure signals. The analysis output of said method may be presented in a variety of ways such as numerical values trend plots of numerical values, histogram presentations or as a quantitative matrix, the presentation as a quantitative matrix is highlighted. Thereby completely new information about pressures is obtained. In particular, information about intracranial compliance is derived from the intracranial pressure (ICP) signal itself.
