[Radiologic detection of congenital hip dislocation at the 4th month]

Area of Science:

• Pediatric Radiology
• Orthopedics
• Developmental Dysplasia of the Hip

Background:

• Congenital dislocation of the hip (CDH) requires early detection for effective treatment.
• Current practices involve X-rays at birth for clinically detected cases and at four months for systematic screening.
• Radiological signs for diagnosing CDH are precise, with evolving criteria for interpretation.

Purpose of the Study:

• To outline the methodology for radiological detection of CDH at four months.
• To evaluate the efficacy and risks associated with mass radiological screening for CDH.
• To identify specific high-risk infant populations that would benefit most from targeted screening.

Main Methods:

• Standardized pelvic radiography technique at four months of age for systematic screening.
• Clinical examination at birth for early detection and treatment monitoring.
• Analysis of diagnostic accuracy and socio-economic/radiation risk factors of mass screening.

Main Results:

• A well-defined radiographic technique is crucial for accurate diagnosis.
• Acetabular angles are no longer considered a primary criterion for detection at this age.
• Mass screening shows socio-economic and radiation benefits but is deemed inadvisable.

Conclusions:

• Radiological screening for CDH should be prioritized for infants identified as high-risk.
• High-risk factors include breech presentation, specific foot/leg deformities, family history, and firstborn infants.
• Targeted screening optimizes resource allocation and minimizes unnecessary radiation exposure in infants.