Flashcards in Sharp Force Injuries Deck (54)
Name two typs of SFI?
1. Incised wounds (cuts, slashes)
2. Puncture wounds (stabs)
"clean division of the full thickness of the skin or tissue under the pressure of a sharp edged instrument”
What type of wound is a paper cut?
What can dicing injuries ndicate?
Location in vehicle
When might you get irregular ragged margins with incised wounds?
Can you identify weapon in incised injuries?
Chop wounds: are they longer than are deep?
Defn: “Penetrating injury caused by separation of the skin and tissues under the pressure of a sharp or blunt pointed instrument”, or
“a small hole made with a sharp point”
Sharp & flat (e.g. knife)
Sharp & thin (e.g. needle)
needle puncture wound
Blunt, long & rigid (e.g. spike, screwdriver)
Extremely common in homicide
What might examination of a stab wound provide information on?
Weapon: dimensions, type, taper, movement, deptth of insertion, direction of insertion and amount of force used
What causes stab wounds to gape?
Contraction of elastic fibres within the skin
What causes stab wounds to appear smaller than with blade in situ?
Elastic retraction of the skin
What distorts the appearance of wounds?
What shape of wound do single-edged blades make?
What kind of knife gives fine v-pointed end?
Sharp cutting knife
What kind of knife gives squared off or rounded end?
Blunt back edge
What kind of knife gives split "fish-tailed" end?
What kind of knife gives RAGGED END?
If both edges of stab wound are squared off or rounded what does that mean?
Knife insreted to the ricasso
If both ends of srab wound reach a fine-vshaped point what does it mean?
Sharp cutting edge
Shark-fin skin tags along wound edges
Parallel scratch abrasions
Striated cuts on cartilage
Serrateed blade: No definitive way of distinguishing from serrated glass fragments
What does taper correlate to?
Wound length on the skin
What offers most resistance to estimating force?
Clothes and skinq
Does wound depth indicate force?
What is most resistant tissue for knife penetration?
Bone, then skin, then muscle
What is the most important factor in skin penetration?
Sharpness of knife