Sonographic Hip Angles in Relation to Gestational Age of Neonates. A Prospective, Cohort in the Population of Northern Greece

Document Type : RESEARCH PAPER

Authors

1 2ndOrthopaedic Department, “Papageorgiou” General Hospital of Thessaloniki, Thessaloniki, Greece

2 2nd Neonatal Department and Neonatal Intensive Care Unit, Aristotle University of Thessaloniki, “Papageorgiou” General Hospital of Thessaloniki, Thessaloniki, Greece

Abstract

Background: Developmental dysplasia of the hip (DDH) is a condition with variation among ethnicities and regions. We aimed to investigate the effect of a gestational week of birth on the sonographic acetabular hip angles of newborns. Methods: We prospectively scanned the hips of neonates born in a single, tertiary hospital during their first week of life, using the Graf sonographic method. Demographics, obstetric history of the mother, birth weight, parity, presentation, family history of developmental dysplasia of the hip (DDH), gender, mode of delivery, single/multiple birth, and gestational age were recorded. Acetabular α and β angles were measured, and hip type was determined according to Graf’s classification. Patients were divided according to the gestational age of birth (<37 weeks, 37-38, 38-39, 39-40, >40 weeks). Results: From May- October 2020, 342 babies (684 hips) were examined (52.9% males / 47.1% females). 76.7% were Caucasian-Greek, and 88.3% were term babies. There was a significant difference between the α-angles of the right and left hip in both genders. More females had Type II hips than males. Subgroup analysis did not reveal a significant difference in hip angles of term babies. There was no correlation between birth weight or gestational age and hip angles. Female gender and the existence of maternal thyroidopathy were positively correlated with Type II hips. Conclusion: Gestational birth age in term infants is unimportant regarding acetabular hip angles. Female gender and maternal thyroidopathy appeared to be related to hip type. Further investigation may be warranted to elucidate the effect of maternal thyroidopathy and hip development. Level of evidence: II

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Main Subjects

References

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The Archives of Bone and Joint Surgery
Volume 11, Issue 3
March 2023
Pages 197-205

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History

  • Receive Date: 21 September 2022
  • Revise Date: 17 November 2022
  • Accept Date: 17 November 2022

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