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학습 자료 둘러보기 →In infants older than 3 months, the classic maneuvers for DDH become less reliable as soft tissues tighten. The most significant indicators shift to asymmetrical gluteal folds and limited hip abduction.
To assess abduction, flex the hips to 90 degrees and gently abduct. Normal range is approximately 75 degrees. A mechanical blockage indicates the femoral head is displaced posteriorly and superiorly against the pelvis.
Asymmetrical skin folds alone can be a normal variant in up to 20% of infants. Always correlate with other signs like limited abduction or a positive Galeazzi sign (uneven knee height) to increase diagnostic accuracy.
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