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Flashcards in Sharp Force Injuries Deck (54)
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1

Name two typs of SFI?

1. Incised wounds (cuts, slashes)
2. Puncture wounds (stabs)

2

"clean division of the full thickness of the skin or tissue under the pressure of a sharp edged instrument”

Incision

3

What type of wound is a paper cut?

Incised

4

What can dicing injuries ndicate?

Location in vehicle

5

When might you get irregular ragged margins with incised wounds?

Glass
Skin folds

6

Can you identify weapon in incised injuries?

Almost impossible

7

Chop wounds: are they longer than are deep?

Yes

8

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”

Stab wound

9

Sharp & flat (e.g. knife)

stab

10

Sharp & thin (e.g. needle)

needle puncture wound

11

Blunt, long & rigid (e.g. spike, screwdriver)

puncture wound

12

Extremely common in homicide

Stab wounds

13

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

14

What causes stab wounds to gape?

Contraction of elastic fibres within the skin

15

What causes stab wounds to appear smaller than with blade in situ?

Elastic retraction of the skin

16

What distorts the appearance of wounds?

Langer lines

17

What shape of wound do single-edged blades make?

Boat shaped

18

What kind of knife gives fine v-pointed end?

Sharp cutting knife

19

What kind of knife gives squared off or rounded end?

Blunt back edge

20

What kind of knife gives split "fish-tailed" end?

Heavy/thick blade

21

What kind of knife gives RAGGED END?

Serrated/hunting knife

22

If both edges of stab wound are squared off or rounded what does that mean?

Knife insreted to the ricasso

23

If both ends of srab wound reach a fine-vshaped point what does it mean?

Sharp cutting edge

24

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

25

What does taper correlate to?

Wound length on the skin

26

What offers most resistance to estimating force?

Clothes and skinq

27

Does wound depth indicate force?

No

28

What is most resistant tissue for knife penetration?

Bone, then skin, then muscle

29

What is the most important factor in skin penetration?

Sharpness of knife

30

What are commonly involved in assult SFI?

Clothing