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Area of Science:

  • Forensic Toxicology
  • Pharmacokinetics
  • Postmortem Analysis

Background:

  • Postmortem drug concentrations vary by sampling site, with central sites generally showing higher levels.
  • Femoral vessel clamping is proposed to mitigate central-to-peripheral drug redistribution.
  • Morphine is a common opiate in postmortem toxicology, necessitating accurate concentration interpretation.

Purpose of the Study:

  • To evaluate postmortem morphine redistribution to peripheral sites.
  • To determine if femoral vessel clamping eliminates this redistribution.
  • To ensure accurate interpretation of postmortem morphine concentrations.

Main Methods:

  • Morphine concentrations were measured in clamped and unclamped femoral vein blood.
  • Samples were collected at three different time points before autopsy.
  • Analysis was conducted on bodies refrigerated at 4°C.

Main Results:

  • No significant change in morphine concentration was observed over time in either clamped or unclamped samples.
  • There was no significant difference in morphine concentrations between clamped and unclamped femoral blood samples.
  • Results indicate minimal postmortem redistribution of morphine within 24 hours.

Conclusions:

  • For morphine, unclamped femoral blood samples are reliable within 24 hours postmortem.
  • Significant redistribution from central sites to peripheral sites does not occur in refrigerated bodies within this timeframe.
  • Femoral vessel clamping is not required to prevent morphine redistribution in these conditions.