Graf method for ultrasound classification of developmental dysplasia of the hip

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Sonographic ~~Classification~~classification of development dysplasia of the hip (DDH)

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Ultrasound classification of developmental dysplasia of the hip (DDH)

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An ultrasound classification system for developmental ~~dysplasia~~ dysplasia of the ~~hips~~hip (DDH) in infants, combining both alpha and beta angles, has been proposed by Graf et al. There are a number of additional subdivisions, which are often not used clinically.

As a general rule, the alpha angle determines the type and in some instances the beta angle is used to determine subtype:

type I: alpha angle >60 degrees (normal)
- type Ia: beta angle <55 degrees
- type Ib: beta angle >55 degrees
type II
- type IIa: alpha angle 50-59 degrees
- type IIb: alpha angle 50-59 degrees
- type IIc
 - alpha angle 43-49 degrees
 - beta angle <77 degrees
type D ("about to decenter")
- alpha angle 43-49 degrees
- beta angle >77 degrees
type III: alpha angle <43 degrees
- type IIIa and IIIb distinguished on the grounds of structural alteration of the cartilaginous roof
type IV
- alpha angle < 43 degrees
- dislocated with labrum interposed between femoral head and acetabulum

-An ultrasound classification system for developmental dysplasia of the hips in infants, combining both <a href="/articles/alpha-angle">alpha </a>and <a href="/articles/beta-angle-ddh">beta </a>angles has been proposed by Graf et al. There are a number of additional subdivisions, which are often not used clinically. As a general rule, the <a href="/articles/alpha-angle">alpha angle</a> determines the type and in some instances the <a href="/articles/beta-angle-ddh">beta angle</a> is used to determine subtype:<ul>
~~-<li>type I: <a href="/articles/alpha-angle">alpha angle</a> >60 degrees (normal)<ul>~~
+An ultrasound classification system for developmental dysplasia of the hip (DDH) in infants, combining both <a href="/articles/alpha-angle-ddh-1">alpha </a>and <a href="/articles/beta-angle-ddh">beta </a>angles, has been proposed by Graf et al. There are a number of additional subdivisions, which are often not used clinically. As a general rule, the <a href="/articles/alpha-angle-ddh-1">alpha angle</a> determines the type and in some instances the <a href="/articles/beta-angle-ddh">beta angle</a> is used to determine subtype:<ul>
+<li>type I: <a href="/articles/alpha-angle-ddh-1">alpha angle</a> >60 degrees (normal)<ul>

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ultrasound

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Graf method for ultrasound classification of developmental dysplasia of the hip

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