Ultrasound screening in developmental hip dysplasia: do all scanned hips need to be followed up?

Area of Science:

• Pediatric Orthopedics
• Diagnostic Imaging
• Neonatal Care

Background:

• Early detection of infant hip instability is crucial for preventing long-term complications.
• Various methods, including risk factors, clinical exams, and ultrasound, are used for screening.
• A standardized screening protocol can improve diagnostic accuracy and patient outcomes.

Purpose of the Study:

• To evaluate the effectiveness of a specific 'at risk' screening protocol for detecting hip instability in newborn infants.
• To assess the correlation between initial ultrasound findings and long-term radiographic outcomes.
• To determine the diagnostic yield of subjective, dynamic, and static ultrasound followed by 12-month radiographic evaluation.

Main Methods:

• Implementation of an 'at risk' screening protocol involving subjective, dynamic, and static ultrasound assessments.
• Follow-up radiographic evaluation at 12 months for infants identified with potential hip instability.
• Retrospective review of clinical data, ultrasound findings, and radiographic results.

Main Results:

• The average age at presentation for hip instability screening was 71 days, with 'clicking hip' being the most common referral reason.
• No hips initially deemed stable by ultrasound showed deterioration.
• All infants with normal initial ultrasound findings had normal radiographs at 12 months; abnormal radiographs were observed in other groups.

Conclusions:

• The investigated ultrasound-based screening protocol for infant hip instability is reliable and accurate.
• Normal ultrasound findings in newborns reliably predict normal radiographic outcomes at 12 months.
• This screening approach effectively identifies infants requiring further investigation for hip instability.