Table 1 Classification of gluteal muscle contracture
From: Classification of gluteal muscle contracture in children and outcome of different treatments
Category according to level | |
|---|---|
Level I (mild) | The extorsion of lower limb is mild, the abduction contracture is less than 15° with both hip and knee joint in 90° of flexion or adduction range is less than 20° with no flexion. Ober's sign and frog squatting sign is weakly positive. The limp gait is not apparent with lateral inclination of pelvis on anteroposterior radiograph being less than 10° |
Level II (moderate) | The extorsion of lower limb is moderate, the abduction contracture ranges from 15° to 60° with both hip and knee joint in 90° of flexion or adduction range is less than 10° with no flexion. Ober's sign and frog squatting sign is positive. The limp gait is apparent with lateral inclination of pelvis on anteroposterior radiograph being less than 20° |
Level III (server) | The extorsion of lower limb is severe, the abduction contracture is more than 60° with both hip and knee joint in 90° of flexion or adduction range is less than 0° with no flexion. Ober's sign and frog squatting sign is strongly positive. The limp gait is remarkably apparent with lateral inclination of pelvis on anteroposterior radiograph being more than 20° |
Category according to type | |
Type MA | Gluteus maximus contraction type |
Type MEI | Gluteus medius and minimus contraction type |
Type AGM | Gluteus maximus, medius and minimus contraction type (All gluteal muscle contraction type) |