Diagnosis of Developmental Dysplasia of the Hip
Diagnosis of developmental dysplasia of the hip typically involves a combination of physical examination, imaging, and patient history. Since early detection dramatically improves outcomes, routine screening for developmental dysplasia of the hip is a standard part of newborn care in many countries.
Clinical Examination
In newborns and young infants, healthcare professionals perform specific manoeuvres during routine check-ups:
Barlow test: The examiner attempts to gently dislocate the hip.
Ortolani test: The examiner attempts to relocate a dislocated hip with a gentle ‘clunk.’
These tests are most effective within the first two to three months of life, as the infant’s muscles are still soft and flexible. As the child grows, the reliability of these tests decreases.
Imaging Tests & Diagnosis of Developmental Dysplasia of the Hip
When physical examination is inconclusive or the infant is at higher risk (e.g. breech birth, family history), imaging studies are used:
Ultrasound: The preferred method for diagnosing DDH in infants under six months. It allows visualisation of the hip joint’s soft tissues and structure.
X-ray: Used after six months of age, once the bones begin to ossify and become visible on radiographs.
Screening Protocols
Many countries follow national screening protocols, which may include:
Newborn physical exams at birth and six-week check-ups
Ultrasound screening for at-risk infants at 4–6 weeks
Follow-up imaging at three to six months if abnormalities are detected
Later Diagnosis
In older children or adults presenting with gait issues or hip pain, diagnosis is based on clinical findings and X-rays. Delayed diagnosis often requires more invasive interventions.
In summary, diagnosis of developmental dysplasia of the hip relies on early screening, clinical tests, and appropriate imaging. Timely diagnosis leads to more effective, less invasive treatment and significantly better long-term outcomes.
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