1. Lumbar Impairments Stop saying, “Patient has residuals.”
Please…
Colossus only recognizes
“Impairments”
from the AMA Guides

2. Lumbar Spine 20-23% Impairment 4.5mm translation
Both flexion & extension
Added together
20-23% Impairment

4. 5% - 8% Impairment 10% - 13% Impairment Muscle guarding or spasm
Assymetric loss of ROM
Non-verifiable radiculopathy
NO AOMSI, or
Herniated disk w/ no symptoms
after non-surgical treatment.
10% - 13% Impairment
Significant signs of radiculopathy
(e.g. dermatomal pain, sensory
loss, loss of relevant reflexes
loss of muscle strength, or
unilateral atrophy)
May be verified by electro-
diagnostics or a combination of
history & clinical findings or
Had surgery, now asymptomatic

5. 20% - 23% Impairment AOMSI or Post surgical arthrodesis
AOMSI is defined as:
>4.5mm translation of one
vertebra on another in both
flexion and extension
(added together)
Arthrodesis is defined as:
(essentially) fusion surgery

6. No more “Residuals”
No more “Residuals”
No more “Residuals”
Only “Impairments”
Only “Impairments”
Only “Impairments”