Novel tools and techniques are provided for assessing, predicting andor effectiveness of cardiopulmonary resuscitation, in some cases, noninvasively. The processing device decomposes the hierarchically structured identifiers of the measurement points into hierarchical levels of different significance, selects the identifiers of the hierarchical levels of the measurement points with the highest significance, and transmits them to a preconfigured mass alarm display unit. The photo-current created by UV light irradiation at the contact area is measured.