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Normal ranges of hip motion in neonates
N Forero1, L A Okamura, M A Larson
1Department of Physical Therapy, Children's Hospital of Los Angeles, California 90027.
Journal of Pediatric Orthopedics
|July 1, 1989
Summary
This study determined normal hip range of motion (ROM) in 60 neonates, finding limited hip extension and greater lateral than medial rotation. These findings establish baseline developmental hip ROM data for healthy newborns.
Area of Science:
- Neonatal development
- Orthopedics
- Biomechanical analysis
Background:
- Establishing normative data for neonatal musculoskeletal development is crucial for early identification of potential abnormalities.
- Hip range of motion (ROM) is a key indicator of healthy joint development in infants.
Purpose of the Study:
- To determine the 95% normal range of passive hip joint motion in healthy, full-term neonates.
- To investigate potential correlations between birth parameters and hip ROM in newborns.
Main Methods:
- Passive range of motion (ROM) of seven hip movements was measured in 60 healthy, full-term neonates.
- Statistical analysis, including Pearson correlation coefficients, was used to analyze the data and identify relationships.
Main Results:
- All neonates exhibited limited hip extension, with lateral rotation exceeding medial rotation.
- No significant sex or ethnicity-based differences in hip ROM were observed.
- Weak positive correlations were found between birth weight/length and abduction with rotation; weak negative correlations existed between birth weight and adduction with flexion/rotation.
Conclusions:
- This study provides comprehensive, detailed normative data for neonatal hip ROM.
- The findings offer a procedural basis for future research on infant hip development and clinical assessment.
- Understanding typical hip ROM in neonates is essential for pediatric orthopedic evaluations.