[On the study of postmortem tissue changes' dynamics according to impedance metrics data]

Area of Science:

• Forensic science
• Biophysics

Context:

• Accurate determination of the postmortem interval is critical in forensic investigations.
• Standardized conditions (4°C, 45% humidity) were used for measurements.
• The study focused on the first month postmortem.

Purpose:

• To develop a method for presenting impedance metrics data to aid in determining the time of death.
• To evaluate the utility of impedance measurements for estimating the postmortem interval.

Summary:

• Impedance measurements were taken on biological samples across three zones and five frequencies under controlled conditions.
• Analysis revealed that absolute impedance values alone are insufficient due to fluctuations.
• The use of relative coefficients and consideration of tissue degradation are recommended for improved accuracy.

Impact:

• Suggests a novel approach to postmortem interval estimation using impedance metrics.
• Highlights the need for further research into impedance dynamics under various conditions.
• Lays the groundwork for a potential algorithm for determining the time of death based on tissue impedance.