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Flashcards in Blunt Force Trauma Deck (20)
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1

What is the medical definition of wound?

Disruption to the continuit of the tissues produced by external mechanical force

2

What is the legal definition of wound?

Breach of full thickness of skin or lining of lip - excludes bruising, abrasion)

3

What mechanical force is a graze on the knee>

Angulation

4

What are the three tissue properties?

Viscosity
Plasticity
Elasticity

5

What are blood vessels vulnerable to?

Stretching

6

What is semi-fluid brain vulnerable to?

Shearing/rotation

7

What is bone vulnerable to?

Torsion

8

What are hollow organs vulnerable to?

Compression

9

What re the two mechanisms of abrasion?

1. Crushing by vertical force
2. Scraping by tangiential force- graze or scrape

10

Do abrasions leave a scar?

No

11

What are the most useful injuries forensically?

Abrasions- indicate site of impact, direction, nature of object and potential for trace evidence transfer

12

Can bruising occur post mortem?

No- always vital phenomenon

13

What produces the colour change in bruises?

Chemical degradation of haemoglobin:
haemosiderin, biliverdin, bilirubin

14

What makes a bruise dark red?

Oxyhaemoglobin

15

What makes a bruise purple/black?

Deoxyhaemoglobin

16

What makes a bruise green after 4-5 days

biliverdin

17

When does a bruise become yelloq?

7-10 days

18

What mimics bruising in asian populations?

Mongolion blue spot

19

What BFT injurt causes full thickness breach of skin?

Laceration

20

What is a combination of abrasion, laceration and brusing?

Bite marks