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Repeated Pelvic Radiographs in Infants, After Harness Treatment for Developmental Dysplasia of the Hip, Carry Very

Elizabeth Vogel1, Thomas Leaver1, Fiona Wall2

  • 1Southampton Medical School, Southampton University, Southampton, UK.

Indian Journal of Orthopaedics
|January 6, 2022
PubMed

Insights

Radiation exposure from pelvic X-rays for infant developmental dysplasia of the hip (DDH) harness treatment is very low. This study quantifies infant radiation doses, finding them to be "Very Low Risk" for malignancy.

Area of Science:

  • Pediatric Orthopedics
  • Radiology
  • Radiation Oncology

Background:

  • Developmental dysplasia of the hip (DDH) often requires follow-up imaging.
  • The radiation exposure to infants from these follow-up radiographs is not well-documented.
  • Assessing this risk is crucial for understanding potential long-term health effects, such as malignancy.

Purpose of the Study:

  • To quantify, for the first time, the radiation exposure in infants undergoing follow-up for DDH treated with harness therapy.
  • To calculate the cumulative effective dose (ED) from pelvic radiographs.
  • To estimate the lifetime risk of malignancy associated with this radiation exposure.

Main Methods:

  • Retrospective analysis of 40 infants successfully treated for DDH with Pavlik harness.
  • Extraction of radiation dose data from hospital radiology information systems.
  • Calculation of cumulative ED using age, sex, and body region conversion coefficients.
  • Comparison of cumulative ED to established safety standards to determine malignancy risk.

Main Results:

  • A mean of 7.00 AP pelvis radiographs were assessed per infant.
  • The mean cumulative effective dose (ED) was 0.25 mSv (range: 0.11-0.46 mSv).
  • This dose is significantly lower than the annual limit for healthcare workers (20 mSv) and categorized as "Very Low Risk".

Conclusions:

  • Cumulative radiation exposure from pelvic radiographs in infants treated for DDH with harness therapy is minimal.
  • The findings provide reassurance to clinicians and address parental concerns regarding radiation risks.
  • This study offers a scientific basis for understanding the safety of DDH follow-up imaging in infants.
Abstract

Keywords:
DDHMalignancyRadiationRiskX-rays

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