In forensic activities the estimation of the age of subcutaneous bleeding is very important. The evaluation of color, however, will vary according to differences of light-source, observer, size, background and so forth. The colorimetric methods using a spectrophotometer can effectively evaluate skin discoloration. In this study, the tristimulus and spectrophotometric patterns of color changes of skin bruises were examined among eight Japanese adult men volunteers wounded by a sharp pinch on the inside of the upper arm and forearm. From a series of color changes among the subjects, the tristimulus data and the spectral reflectance graphs showed variable patterns that made a comparison of absolute numerical values by a single measurement meaningless. Therefore, if we use colorimetric methods in a practical case, we should measure bruises in the same lesion twice or more at intervals of 1 or 2 days.
- Subcutaneous bleeding
ASJC Scopus subject areas
- Pathology and Forensic Medicine
- Issues, ethics and legal aspects