Body Area

Injury Criteria

Unit

No Injury

Egress

Minor Injury

Egress

Major Injury

Egress Assisted

Severe Injury

Medical Assistance

Potentially non survivable

Head

Brain Injury

Head Injury Criterion

(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)

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

Neck

Neck Compression

(N)

<1500

1500 – 4000

Minor ligament / muscle injury

AIS 1-3

>4000

Major fracture and dislocation

AIS 4-6

Neck Tension

(N)

<1200

1200 – 3300

Minor ligament / muscle injury

AIS 1-3

>3300

Major neck rupture and dislocation

AIS 4-6

Neck Shear Force

(N)

<1100

1100 – 3300

Minor ligament / muscle injury

AIS 1-3

>3300

Major neck rupture and dislocation

AIS 4-6

Neck Flexion Bending Moment

(Nm)

<61

61 – 190

Minor ligament / muscle injury

AIS 1-3

190 – 203

Major Fracture

AIS 3 -5

190 – 203

Major Fracture

AIS 3 -5

Neck Extension Bending Moment

(Nm)

<47

47 – 57

Minor ligament / muscle injury

AIS 1-3

>57

Major neck rupture and dislocation

AIS 4-6

Thorax

Frontal Rib Fracture Criterion

mm

<58

(No Fracture)

58 – 70

(1 Fracture)

70 –92

(2-4 Fractures)

> 92

(Flailed Chest)

>92

(Flailed Chest)

Lateral Rib Fracture Criterion

mm

<42

(No Fracture)

42 - 53

(1 Fracture)

53 – 74

(2 – 4 Fractures)

>74

(Flailed Chest)

>74

(Flailed
Chest)

Thorax Internal Organ Injury Criterion

V*C

<0.5

(No injury)

0.5 – 0.75

(Minor contusions)

0.75 – 1.0

(Minor Lacerations)

1.0    – 1.5

(Major Ruptures)

>1.5

(Massive failure and haemorrhaging)

Abdomen

Abdomen Injury Criterion

(Compression)

%

10%

(No injury)

10 – 20%

(Very minor injury)

20 – 30%

(Minor Lacerations)

20 – 40%

(Severe lacerations)

N/A

Pelvis

Pelvis Frontal Injury Criterion

KN

None set

None set

None set

None set

None set

Pelvis Lateral Injury Criterion

KN

< 4.0 KN

(No Injury)

< 4.0 KN

(No Injury)

4.0 – 6.0 KN

(Minor Fracture)

6.0 – 10.0 KN

(Major fracture)

>10.0 KN

(Crushed Pelvis)

Extremities

Humerus Fracture Index Criterion

Fracture

Index

<1

1 – 1.3

(Simple Fracture)

>1.3

(Complex Fracture)

-

-

Ulna Fracture Index Criterion

Fracture Index

<1

1 – 1.3

(Simple Fracture)

>1.3

(Complex Fracture)

-

-

Radius Fracture Index Criterion

Fracture Index

<1

1 – 1.3

(Simple Fracture)

>1.3

(Complex Fracture)

-

-

Shoulder Injury Criterion

Impact Velocity

(m/s)

<2

2 – 5

(Minor Injury)

>5

(Total dislocation)

-

-

Hand Fracture Criterion

Impact Velocity

(m/s)

<5

>5

(Fracture to hand or wrist)

-

-

-

Sharp Hand Laceration Criterion

Impact Velocity

(m/s)

<2.5

2.5 – 5.0

(Minor Laceration)

>5.0

(Major Laceration)

-

-

Blunt Hand Laceration Criterion

Impact Velocity

(m/s)

<5.0

5.0 – 8.0

(Minor Laceration)

>8.0

(Major Laceration)

-

-

Femur Fracture Index Criterion

Fracture Index

<1

<1

1 – 1.3

(Simple Fracture)

>1.3

(Complex Fracture)

-

Tibia Fracture Index Criterion

Fracture Index

<1

<1

1 – 1.3

(Simple Fracture)

>1.3

(Complex Fracture)

-

Fibula Fracture Index Criterion

Fracture Index

<1

<1

1 – 1.3

(Simple Fracture)

>1.3

(Complex Fracture)

-

Knee Dislocation Criterion

Shear Longitudinal Displacement

mm

<8

8 – 15

(Knee soft tissue damage)

>15

(Total dislocation / ligament rupture)

-

-