Qualitative diatom analysis as a tool to diagnose drowning.

Since the 1950s, quantitative diatom analysis has been used successfully at the Department of Forensic Medicine at the University of Helsinki as a supportive method for diagnosing deaths by drowning. The reliability of the method was firmly established in 1986 by a study involving 107 probable cases of drowning. Since 1982, the quantitative analysis has been complemented with qualitative diatom analysis. This report presents potential applications of the latter method by describing its use in six cases of drowning.