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Changes in tissues and organs through PMCTA carrier substances.

G M Bruch1,2, N H C Feldmann3, F T Fischer3

  • 1Institute of Legal Medicine, Ludwig-Maximillians-University Munich, Nussbaumstr 26, D- 80336, Munich, Germany. gina.bruch@med.uni-muenchen.de.

International Journal of Legal Medicine
|October 24, 2024
PubMed
Summary
This summary is machine-generated.

Polyethylene glycol (PEG) and oil significantly alter tissues differently during post-mortem CT angiography (PMCTA). PEG aids preservation and diagnostic quality, while oil accelerates decomposition, impacting forensic analysis.

Keywords:
Carrier substancePEGPMCTAParaffin oilPolyethylenglycole

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Area of Science:

  • Forensic pathology
  • Radiology
  • Medical imaging

Background:

  • Post-mortem computed tomography angiography (PMCTA) commonly uses lipophilic oil-based or hydrophilic polyethylene glycol (PEG)-based contrast agents.
  • The effects of these carrier substances on tissues and organs are not well understood.

Purpose of the Study:

  • To analyze the changes in cadaveric tissues and organs caused by PEG 200 and oil.
  • To compare the preservation and diagnostic quality of tissues treated with PEG 200 versus oil.

Main Methods:

  • Liquid blood and organ/vessel samples were collected during forensic autopsies.
  • Samples were preserved in PEG 200 or oil at room temperature.
  • Sample condition was documented at 0, 24, 48, and 72 hours, with microscopic examination at 72 hours.

Main Results:

  • PEG 200 caused rapid solidification of tissues and crumbly blood agglomerates within 24 hours.
  • Oil-preserved samples showed signs of decomposition, increasing over time.
  • Microscopic evaluation revealed good diagnostic quality for PEG-preserved samples, while oil-preserved samples were difficult to analyze due to putrefaction.

Conclusions:

  • PEG 200 and oil have markedly different effects on human tissues, primarily impacting conservation and dehydration.
  • Understanding these differences is crucial for selecting the optimal PMCTA method in forensic investigations.