BU HI Lecture 3

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Author:
bkkrafft
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22605
Filename:
BU HI Lecture 3
Updated:
2010-06-08 10:32:20
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BU Homicide Investigation
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Description:
Investigating Fatal Injuries
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  1. What are the post mortem changes seen in the eyes?
    The eyes turn slightly milky or cloudy 1/2 hour after death.
  2. What is rigor mortis? and what is the timeline associated with it?
    • stiffening of muscles due to chemical changes
    • begins 2-4 hours after death
    • complete in 8-12 hours
    • begins to dissappear in 18-36 hours
    • completely gone in 48-60 hours
  3. What is the term for the postmortem pooling of blood due to gravity?
    livor mortis
  4. What is the timeline associated with livor mortis?
    • begins 1/2 hour after death
    • full development 3 to 4 hours after
    • fixed in 8 to 10 hours
  5. Putrefaction is the term for what postmortem change?
    Conversion of tissue to liquids and gases. Noticeable within 24 hours and discoloration is pronounced within 36 hours.
  6. What is adipocere?
    greasy substance on surface of body that develops when the body is in a wet, moist area
  7. What artifact of death occurs when the body is left in a hot, dry place?
    mummification

    it occurs in a hot, dry place with the circulation of dry air. body tissues become hard and the body may be preserved for years.
  8. What is the legal responsibility of the medical examiner or coroner?
    to determine cause and manner of death
  9. Natural, accident, homicide, suicide, and undetermined are all examples of what?
    manners of death
  10. The illness, injur, or combination of both responsible for initiating the sequence of events, brief or prolonged, which produced the fatal determination is known as?
    cause of death
  11. T/F: Mechanism of death is the fashion or circumstance in which the cause of death arose.
    False!

    the definition given is for the manner of death
  12. The bodily derangement or chemical disturbance that is incompatible with life that is initiated by the cause of death is:
    A) manner of death
    B) cause of death
    C) mechanism of death
    C) mechanism of death
    (this multiple choice question has been scrambled)
  13. What are the four main subdivisions of blunt force trauma?
    • 1. scrapes or abrasions, scratches or grazes
    • 2. bruises or contusions
    • 3. tears or lacerations
    • 4. fractures of bones
  14. What type of trauma is it when the outer layers of the skin are removed by a compressive and/or sliding force?
    abrasions
  15. T/F: Abrasions can indicate the exact site of contact or impact.
    True!
  16. What type of trauma is the result from leakage of blood vessels into the tissues after suffcient force has been applied to distort the soft tissues and tear one or more vessels?
    contusions or bruises
  17. What are lacerations?
    defects in soft tissue resulting from tearing, ripping, crushing, over stretching, pulling apart, bending and shearing
  18. Why do lacerations appear frequently overlying bony prominences of the body?
    the skin there is more fixed and tears when stresses
  19. What is the difference between coup and countr-coup injuries?
    • coup- moving object strikes stationary head
    • countre-coup- moving head striking stationary object
  20. What are the two main types of sharp force trauma>>
    • 1. cuts/incisions/incised wounds
    • 2. stab wounds
  21. What is the difference between incision type and stab type wounds?
    incision type wounds are longer than they are deep and stab type wounds are deeper than they are wide

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