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Optic Nerve Sheath Point of Care Ultrasound: Image Acquisition
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Optic Nerve Sheath Diameter in Preterm Infants: Suggested Values.

Molly Rayner1, Tanya Holt2, Sibasis Daspal3

  • 1College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.

Neonatology
|March 23, 2021
PubMed
Summary

Detecting elevated intracranial pressure (ICP) in preterm infants is crucial. This study found optic nerve sheath diameter (ONSD) measurements by MRI and ultrasound are similar, proposing new suggested ONSD values for clinical use.

Keywords:
Intracranial pressure increaseMagnetic resonance imagingNeonateUltrasonography

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Area of Science:

  • Neonatal neurology
  • Pediatric neuroimaging
  • Ophthalmology

Background:

  • Elevated intracranial pressure (ICP) in high-risk preterm infants can lead to severe neurologic deficits.
  • Optic nerve sheath diameter (ONSD) is a reliable indicator of ICP changes.
  • Established ultrasonographic ONSD values exist for preterm infants.

Purpose of the Study:

  • To compare MRI-measured ONSD with existing ultrasonographic ONSD data in preterm infants.
  • To propose suggested ultrasonographic ONSD values based on corrected gestational age.
  • To enhance the clinical utility of ONSD measurements for ICP assessment.

Main Methods:

  • Retrospective analysis of ONSD measurements from preterm infant MRIs.
  • Correlation of MRI ONSD with pre-existing ultrasonographic ONSD data.
  • Stratification of data by corrected gestational age and application of linear regression.

Main Results:

  • High correlation (R2 values 0.93-0.96) between MRI and ultrasound ONSD measurements.
  • ONSD values showed a strong correlation with corrected gestational age.
  • Suggested ONSD values were developed, increasing with gestational age.

Conclusions:

  • MRI and ultrasound ONSD measurements are comparable in preterm infants.
  • The proposed suggested ONSD values can aid clinicians in managing suspected or known ICP.
  • Standardized ONSD values may improve early detection and intervention for ICP in neonates.