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Postmortale Organtemperaturen unter verschiedenen Umweltbedingungen

Environmental influences to postmortem temperature curves

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Summary

The investigation deals with the postmortem temperature curves of the central and peripheral brain regions and of the liver at different environmental temperatures. The temperature grades were 10, 15, 20, 25 and 30°C and were kept constant in a special box into which the corpse was brought for measurements. 25 corpses were grouped into 5 classes each consisting of 5 according to the temperature grade. Thin and flexible temperature probes were inserted into the organs without causing relevant injuries. All recordings were started in a time period of 50 to 120 min postmortem.

The individual curves showed a sigmoid course, the liver cooling curve running much slower than the brain curves. During the postmortem period observed a temperature plateau of brain curves was not registered whilst this phenomenon was observed in the liver unto 3–5 hours. Within a given temperature grade the individual brain curves showed much less variation than the liver curves. Preliminary data suggest that the density of the hair influences two characteristics of the brain curves. In bald-headed corpses the maximum temperature difference between the central and peripheral brain zones was greater and the half-life periods were shorter than in dense-headed corpses. In the temperature grades between 15 to 25°C the central half-life periods were correspondingly reached between 6 and 6 1/2 h postmortem. In the temperature grades 10–20°C the thermal difference curves were quite similar whilst higher environmental temperatures were accompanied by lessened differences.

When compared with the data presented curves of hypothetically unknown postmortem timing were fittingly arranged to the time of death with a variance of only ± 1 hour. If statistically completed the curves will be analysed by a computer program.

Zusammenfassung

Es handelt sich um eine systematische Untersuchung zum postmortalen Temperaturabfall im Gehirn und in der Leber bei verschiedenen Umgebungstemperaturen. Je 5 Leichen wurden bei Temperaturstufen von 10, 15, 20, 25 und 30°C gemessen. Wie in einer vorhergehenden Arbeit beschrieben, wurden spezielle Mikrosonden zur Temperaturableitung aus dem Hirnzentrum und der Hirnperipherie praktisch verletzungsfrei eingeführt. Meßbeginn war zwischen der 50. und 120. min p. m..

Die Einzelkurven zeigten einen sigmoiden Verlauf, die Temperaturausgleichskurve der Leber verlief wesentlich langsamer als die Hirnkurven. In dem untersuchten p. m. Zeitraum war in den Hirnkurven kein Temperatur-Plateau mehr erkennbar, während die Leberkurven dieses bis zu 3–5 h Dauer aufwiesen. Die Streuung der Hirn-Einzelkurven war wesentlich geringer als die der Leberkurven. Die Behaarungsdichte beeinflußt offensichtlich zwei Temperaturkennwerte. Bei kahlköpfigen Leichen waren die Temperaturdifferenzen zwischen Hirnzentrum und-Pheripherie größer und die thermischen Halbwertzeiten kürzer als bei dicht behaarten. Die thermischen Halbwertzeiten wurden in den Temperaturklassen 15–25°C zwischen 6 und 6 1/2 h p. m. erreicht. Die Differenztemperaturkurven zwischen Hirnzentrum und Peripherie waren in den Temperaturklassen 10–20°C etwa gleich, bei höheren Temperaturen waren die Maxima deutlich verringert. Hypothetisch unbekannte späte Kurventeile konnten bei Vergleich mit dem vorliegenden Kurvenmaterial mit einer Genauigkeit von ± 1 h dem Todeszeitpunkt angeglichen werden.

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Mit Unterstützung durch die Deutsche Forschungsgemeinschaft

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Brinkmann, B., Menzel, G. & Riemann, U. Postmortale Organtemperaturen unter verschiedenen Umweltbedingungen. Z Rechtsmed 81, 207–216 (1978). https://doi.org/10.1007/BF00201269

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  • DOI: https://doi.org/10.1007/BF00201269

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