A method and apparatus for preprocessing and postprocessing content in an interactive information distribution system. The printable film is preformed and then inserted into a mold which has the configuration of the preformed printable film. The use of multiple reversible or labile linkages connecting component parts provides for physiologically responsive activity modulation. A synchronization unit unfixes fixed synchronization and tracks synchronization when the interference signal cancellation is stable. Light of selected wavelengths is passed through blood or body tissue and the transmitted or reflected light is detected and the detected signals can be electronically compared and manipulated to provide the non-invasive, continuous and quantitative display of a patients blood urea, blood osmolarity, plasma free hemoglobin and tissue water content.