Clean FRCS notes with inline figures
What is the use of USG?
•Confirm reduction
•Baseline of alpha and beta angle
•Perform within 2 weeks of Pavlik harness
•Assess capsular laxity in hip clicks
•Interpretation of USG
•Identify landmark
•Ilium
•Bony acetabulum
•Labrum / abductor muscle
•Femoral head
•Confirm concentric reduction
Assess coverage:
•>50% in
•Labrum pointing upwards
•Labrum pointing inwards
•Measure alpha and beta angle
•Alpha angle: between ilium and bony acetabulum (Normal >60)
•Beta angle: between ilium and labrum (normal <55)
•Graf hip angle measurement
| Type / group | Definition / note |
|---|---|
| I | alpha >60 |
| II | alpha 43-60 |
| III | alpha <43 |
| IV | alpha<43 + interposed labrum |
•Harcke dynamic USG measurement
•Bony coverage
•50% rule for femoral head coverage (Harcke)