V.Classification(分型) According to the degree of lesion (joint surface contact),there are three types. (I)Acetabular Displasia(发育不良) (IⅡ)Subluxation of the Hip Joint(半脱位) (ll):Dislaocation of the Hip Joint(脱位)
Ⅳ. Classification(分型） According to the degree of lesion（joint surface contact), there are three types. (Ⅰ)Acetabular Displasia（发育不良） (Ⅱ) Subluxation of the Hip Joint（半脱位） (III): Dislaocation of the Hip Joint（脱位）
Dislocation of the Hip Joint most often,femoral head off the acetabulum Location of the Indexin Dislocation Direction Femoral Head External Acetabular Level The Outer Edge of Ⅱ Laterosuperior the Acetabulum Ⅲ Posterosuperior Alae llii Level IV Stage:The femoral head reaches the level of the iliac sacral joint
Dislocation of the Hip Joint most often, femoral head off the acetabulum Location of the Femoral Head Acetabular Level The Outer Edge of theAcetabulum Indexin Dislocation Direction Ⅰ External Ⅱ Laterosuperior Ⅲ Posterosuperior Alae Ilii Level Ⅳ Stage：The femoral head reaches the level of the iliac sacral joint
Normal Subluxation Dislocation The glenoid labrum The glenoid labrum The glenoid labrum is introrsus,between the is located on the turned outwards, femoral head and femoral head. between the femoral head and ilium. acetabulum
Normal The glenoid labrum is located on the femoral head. Subluxation The glenoid labrum turned outwards, between the femoral head and ilium. Dislocation The glenoid labrum is introrsus, between the femoral head and acetabulum
V.Clinical Manifestation(临床表现) (I)Newborn and Infant Period (<6 months) 1.Symptoms (1)skin texture asymmetry(front and back) (2)shortening and external rotation of affected limb (3)snapping hip (4)limited or less movement of the affected limb
Ⅴ. Clinical Manifestation（临床表现） (Ⅰ) Newborn and Infant Period （<6 months） 1.Symptoms ⑴ skin texture asymmetry (front and back) ⑵ shortening and external rotation of affected limb ⑶ snapping hip ⑷ limited or less movement of the affected limb
2.Physical Examination Allis'Sign (1)femoral artery pulsation weakened (2)Allis'sign is positive. (3)Hip Abdunction Test Hip Abdunction Test
⑴ femoral artery pulsation weakened ⑵ Allis' sign is positive. ⑶Hip Abdunction Test 2. Physical Examination Allis' Sign Hip Abdunction Test