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Related Concept Videos

Enhanced Elimination of Poison01:26

Enhanced Elimination of Poison

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Poison can be effectively removed from the gastrointestinal (GI) tract through various decontamination procedures.
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Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
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Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis
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Helium poisoning: new procedure for sampling and analysis.

Vincent Varlet1,2, S Iwersen-Bergmann3, M Alexandre4

  • 1Forensic Toxicology and Chemistry Unit, University Centre of Legal Medicine, 1000, Lausanne, Switzerland. vincent.varlet@chuv.ch.

International Journal of Legal Medicine
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Summary
This summary is machine-generated.

Suicidal asphyxiation deaths involving helium (He) are increasing. Updated autopsy guidelines recommend lung tissue, brain, and cardiac blood for He detection, with gaseous samples also useful for analysis.

Keywords:
AsphyxiaGC-MSHeliumSuffocationSuicide

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Area of Science:

  • Forensic Toxicology
  • Autopsy Pathology
  • Inert Gas Asphyxiation

Background:

  • Suicidal asphyxiation using inert gases, particularly helium (He), is a growing concern globally.
  • Varied case management and interpretation highlight the need for standardized diagnostic approaches.
  • The gaseous nature of helium presents unique analytical challenges in post-mortem investigations.

Purpose of the Study:

  • To propose updated autopsy guidelines for the detection of helium exposure.
  • To identify optimal biological and gaseous sample types for accurate diagnosis.
  • To address analytical challenges associated with helium in forensic autopsies.

Main Methods:

  • Analysis of 12 recent cases of suspected helium asphyxiation.
  • Comprehensive review of current literature on inert gas asphyxiation.
  • Evaluation of forensic imaging as a tool for anatomical site documentation.

Main Results:

  • Lung tissue, brain, and cardiac blood are identified as the most relevant biological samples for helium detection.
  • Tracheal, pulmonary, gastric, and cardiac gaseous samples are recommended as alternative matrices.
  • Helium concentrations vary significantly between gaseous (up to 12 μmol/mL) and solid/liquid samples (up to 28 μmol/g).

Conclusions:

  • Specific sampling strategies are crucial for confirming helium exposure during autopsy.
  • Quantification of helium in biological samples can provide further insight into exposure conditions.
  • Standardized autopsy protocols are needed to improve the accuracy and consistency of diagnosing helium asphyxiation.