Carbon Monoxide Poisoning

Carbon Monoxide Poisoning

  • Description:

    • Carbon Monoxide (CO) is an odourless, tasteless, and colourless gas.

  • Initial Symptoms of Low-Level Poisoning:

    • Symptoms are similar to flu.

    • Common symptoms include:

    • Dizziness

    • Headaches

    • Fatigue

    • Nausea

  • Mechanism of Action:

    • CO binds with hemoglobin, forming carboxyhemoglobin.

    • This prevents oxygen (O2) from bonding to red blood cells (RBCs).

    • Hemoglobin has a higher affinity for CO than for O2.

    • Inability of hemoglobin to transport O2 leads to asphyxia and potential coma.

  • Concentration and Effects:

    • 0.1% concentration results in symptoms.

    • 0.5% concentration may cause death.

  • Blood Changes:

    • The blood becomes cherry red in color due to CO's presence.

    • CO inhibits coagulation reactions, resulting in blood flowing more freely.

    • CO causes increased hemolysis (destruction of red blood cells), leading to more staining.

Embalming Concerns

  • Considerations After Death:

    • If the case is a suicide, questions arise regarding the reasons behind the act.

    • Extensive hemolysis may have occurred.

    • Decomposition can happen if the subject is not found for an extended period.

    • Classic livor mortis (LM) is unlikely due to discoloration or staining from CO.

    • The face may be distorted due to surface pressure or the effects of gravitated blood.

    • Possible evidence of dehydration or burns on the face if the subject was near a tailpipe.

    • Possible presence of vermin in the surrounding area.

Emergency Intervention

  • Treatment of Live Subjects:

    • If the person is found shortly after the poisoning and is still alive, methylene blue may be administered.

    • Methylene blue helps to break the bond between CO and hemoglobin, facilitating recovery.

  • Autopsy Considerations:

    • An autopsy is almost always expected in cases of suspected CO poisoning.

    • If embalming is delayed, use carotid or jugular veins for embalming.

  • Cosmetic Interventions:

    • Opaque cosmetics may be used to conceal any visible stains resulting from CO exposure.