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Examining infants' hips--can it do harm?
1St. Mary's Orthopaedic Hospital, Cork, Republic of Ireland.
Insights
Early detection of congenital hip dislocation is challenging. This study suggests the infant examination itself may inadvertently cause hip instability, explaining late-onset dislocations.
Area of Science:
- Pediatrics
- Orthopedics
- Developmental Biology
Background:
- Congenital dislocation of the hip (CDH) remains a clinical challenge despite early detection efforts.
- The reasons for late-onset CDH in infants screened as stable at birth are not fully understood.
- Variability in detection success rates across centers and examiners suggests factors beyond simple error.
Purpose of the Study:
- To investigate the potential role of the infant hip examination in causing hip instability.
- To explore an alternative explanation for late-diagnosed congenital dislocation of the hip.
Main Methods:
- This study proposes a novel hypothesis regarding the mechanism of CDH development.
- It analyzes existing data and clinical observations to support the proposed theory.
Main Results:
- The standard infant hip examination may paradoxically induce instability in a previously stable hip joint.
- This instability could lead to the development of late-onset congenital dislocation of the hip.
Conclusions:
- The physical examination maneuver for infant hips warrants re-evaluation.
- Understanding the examination's potential iatrogenic effects is crucial for improving CDH prevention strategies.
Abstract:
Attempts to eliminate congenital dislocation of the hip by detecting it early have not been completely successful. It is not known why some infants, checked by competent examiners, still appear late with dislocations. The usual explanations of a mistake by the examiner, or of spontaneous dislocation of a hip that was stable at birth, do not explain why some centres succeed while others fail, or why good examiners may become less effective with experience. The explanation suggested is that the examination itself could be responsible and may actually cause a hip to become unstable.