👶 Infant Hip Ultrasound Graf Classification
UsePediatric hip imaging: infant hip ultrasound and pediatric AP pelvis — DDH screening and cerebral palsy hip s…
SourceGraf R. The diagnosis of congenital hip-joint dislocation by the ultrasonic compound treatment. Arc…
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
Methodology · worked example, guidelines & full notes
Standard coronal plane in lateral decubitus showing a straight iliac line, the lower limb of the ilium and the labrum.
When to use
Pediatric hip imaging: infant hip ultrasound and pediatric AP pelvis — DDH screening and cerebral palsy hip surveillance.
How it works
Ia / Ib α ≥ 60° (β ≤ 55° Ia, > 55° Ib): Mature hip, no treatment IIa α 50–59°, < 12 weeks (after 6 weeks α < 55° = IIa−): Physiologic immaturity, repeat; treat IIa− IIb α 50–59°, ≥ 12 weeks: Delayed ossification, abduction treatment IIc α 43–49°, β ≤ 77°: Critical hip, abduction treatment D α 43–49°, β > 77°: Decentering hip, treat III / IV α < 43°, labrum cranial (III) / caudal (IV): Dislocated, reduction then abduction
Key points
- Standard coronal plane in lateral decubitus showing a straight iliac line, the lower limb of the ilium and the labrum.
- Each value is graded against published reference ranges.
- Measurement technique and positioning change the numbers — compare like with like on follow-up.
- Part of the YuanDoctor MSK measurement topic.
References
- Graf R. The diagnosis of congenital hip-joint dislocation by the ultrasonic compound treatment. Arch Orthop Trauma Surg 1980;97:117-133
- Graf R. Hip sonography: diagnosis and management of infant hip dysplasia. 2nd ed. Springer 2006
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Alpha angle | 56 ° |
|---|---|
| Beta angle | 70 ° |
| Age | 8 weeks |
| Labrum position (alpha < 43°) | Pushed cranially (everted) |
→GrafIIa+
- α / β：56° / 70°, 8 weeks
- Management：Physiologic immaturity, repeat in 4–6 weeks until mature (type I by 12 weeks)
Verification & sources · governance
FAQ
Frequently asked questions
- What are the limits and cautions when using Infant Hip Ultrasound Graf Classification?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- Does Infant Hip Ultrasound Graf Classification upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is Infant Hip Ultrasound Graf Classification calculated in practice? Can you show a worked example?
- Inputs: Alpha angle 56 °, Beta angle 70 °, Age 8 weeks, Labrum position (alpha < 43°) Pushed cranially (everted) → Result: Graf IIa+（α / β: 56° / 70°, 8 weeks, Management: Physiologic immaturity, repeat in 4–6 weeks until mature (type I by 12 weeks)）