Injury Criteria

Tolerance Levels

Criterion

Units

Level 0

Level 1

Level 2

Level 3

Level 4

No Injury

Egress

Minor Injury

Egress

Major Injury

Egress Assisted

Severe Injury

Medical Assistance

Potentially Non Survivable

HIC Brain Injury

(Brain Injury in all head impacts)

HIC

<150

(No concussion)

<150

(No concussion)

150 – 500

(Mild concussion)

500 – 1800

(Severe concussion)

1800

(Life threatening coma)

HIC Skull Fracture

(Flat Impacts)

HIC

<500

(No Fracture)

<500

(No Fracture)

500 – 900

(Minor Fracture)

900 – 1800

(Major Fracture)

1800

(Life threatening fracture)

Blunt Object Skull Fracture

KN

<2.2

(No Fracture)

<2.2

(No Fracture)

2.2 – 5.5

(Minor depressed fracture)

>5.5

(Major depressed fracture)

>5.5

Facial Injury

KN/mm

>0.25/12

(Very minor injury)

0.25/12 – 0.90/20

(Minor facial injury)

0.90/20 – 3.3/40

(Major facial facture)

>3.3/40

(Severe facial injury)

>3.3/40

Facial Laceration

Cuts to chamoios leather thin layer

0

0

Moderate

Major

N/A