Background
- Seronegative
- Others: Reiter (cant see pee or climb tree)
- HLA b27
Pathophysiology
- Enthesisitis, bony erosion, joint ankylosis
- SI joints, facets, symphyses pubic
- Disc space involved- bridging syndesmophyte
Dx Criteria
- Bilateal SI
- Uveitis
- HLA B27 +ve
- F -ve
Systemic
- Uveitis
- Heart disease
- Pulmonary fibrosis
- Renal amyloidosis
- Ascending aota
- Klebsielle pneumonia
Ortho Manifestations
- Bilateral SI
- Spine kyphotic
- Hip and shoulder OA
Presentation
- Onset 3rd deecade
- Loss of horizontatl face
- Limited chest wall expansion
- CBVA – corection improves outcomes
- Hip flexion contracture
- SI pain – Faber
Imaging
- CT
- Full length other fractures
- For trivial fractures
- MRI
- Epidural hematoma
Fractures
- Location
- Lower C spine
- TL junction
- Spinal fracture
- Unstable
- High neuro injury
- Epidural hematoma
- Multiple fracture
- Extension
- Why?
- Osteoporosis
- Long level
- Kyphotic
- Preop considerations
- Positioning don’t push head down
- Spine board as trauma
- MRI
- OR
- Anesthesia
- Cardiac ascending aota
- Chest wall Resp
- Don’t correct
- IONM
- Constuct lenth
- At least 3 above and below – long bone
- Positioning don’t push head down
DISH | AS |
Candle wax | Bamboo spine, shiny cornerrs |
Disc space normal | Ossifying dis (C spine) |
No osteopenia | Osteopenia (bleeds more) |
NO HLA B27 | HLA B27 +ve |
DM Yes | No DM |
Older | Younger |
No SI | SI |