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

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

>203

Neck Dislocation

AIS 6

Neck Extension Bending Moment

(Nm)

<47

47 – 57

Minor ligament / muscle injury

AIS 1-3

>57

Major neck rupture and dislocation

AIS 4-6