Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Ultrasonography in developmental hip dysplasia

N M Jomha1, J McIvor, G Sterling

  • 1University of Alberta Hospital, Edmonton, Canada.

Journal of Pediatric Orthopedics
|January 1, 1995
PubMed
Summary

Graf

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Observation of disorder-free localization using a (2+1)D lattice gauge theory on a quantum processor.

Science (New York, N.Y.)·2026
Same author

Visualizing dynamics of charges and strings in (2 + 1)D lattice gauge theories.

Nature·2025
Same author

Scaling and logic in the colour code on a superconducting quantum processor.

Nature·2025
Same author

Thermalization and criticality on an analogue-digital quantum simulator.

Nature·2025
Same author

Phase transitions in random circuit sampling.

Nature·2024
Same author

Dynamics of magnetization at infinite temperature in a Heisenberg spin chain.

Science (New York, N.Y.)·2024

Area of Science:

  • Pediatric Orthopedics
  • Diagnostic Imaging

Background:

  • Developmental hip dysplasia diagnosis increasingly relies on ultrasonography.
  • Standardized criteria like Graf's angles and Harcke's bony rim percentage lack documented repeatability and reliability.

Purpose of the Study:

  • To assess the repeatability and reliability of Graf's alpha/beta angles and Harcke's bony rim percentage for diagnosing developmental hip dysplasia.
  • To compare the clinical usefulness of these two ultrasonographic methods.

Main Methods:

  • Three physicians independently measured 58 hip ultrasounds from 29 infants.
  • Statistical analysis was performed to evaluate measurement consistency.

Main Results:

  • Both Graf's and Harcke's methods demonstrated repeatability with adequate training and experience.
  • Harcke's method presented a significant "equivocal zone," limiting its clinical utility.
  • Graf's angles provided a more distinct classification system.

Conclusions:

  • Ultrasonographic criteria for developmental hip dysplasia can be repeatable with proper training.
  • Graf's angles offer a potentially more useful classification than Harcke's method, though clinical relevance requires further study.

Related Experiment Videos