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Precision of estimating the time since death by vitreous potassium-Comparison of 5 different equations
Jan Ortmann1, Philipp Markwerth1, Burkhard Madea1
1Institute of Forensic Medicine, University of Bonn, Stiftsplatz 12, D-53111 Bonn, Germany.
Abstract:
The precision of death time estimation by vitreous potassium using 5 different formulas is compared on a random sample of 600 cases. Mean differences, standard deviations and 95% limits of confidence between real and extrapolated time since death were calculated. The best results were obtained using equations with "mean" slopes of about 0,17 or 0,19mmol/l per hour. Equations with a steeper or flatter slope reveal already great mean deviations between real and extrapolated time since death and do not allow a reliable death time estimation.
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