SI Joints Ratios Flashcards
1
Q
why are SI ratios done?
A
evaluates sacroiliitis
- done because SI joints are normally “hot” on scans, so this is a way we can evaluate whether or not it is actually ab/normal
2
Q
sacroiliitis
A
inflammation of SI joints; presents with lower back pain
3
Q
what can cause sacroiliitis?
A
trauma, arthritis, pregnancy and infection (rare)
4
Q
normal results for SI ratio
A
SI joint:sacrum
<1.5:1
5
Q
abnormal results for SI ratio
A
SI joint:sacrum
>1.5:1
6
Q
what can cause error in SI ratios?
A
if there is any pathology in the sacrum as it will falsely lower the ratio due to sacrum being hotter
