Ocular blood flow in preterm neonates: A preliminary report

Ronald H. Silverman, Raksha Urs, Danny H.Kauffmann Jokl, Leora Pinto, Osode Coki, Rakesh Sahni, Jason D. Horowitz, Steven E. Brooks

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Purpose: Retinopathy of prematurity (ROP) is a vision-threatening complication occur-ring in pre-term neonates. The standard of care entails regular monitoring by dilated ophthalmoscopy examinations, which entail stress and potential morbidity. In this pilot study, we used plane-wave ultrasound (PWUS) to image, measure, and assess the association of blood-flow velocities in the retrobulbar vessels with ROP stages ranging from stage 0 (immature vessels without ROP) to stage 3. Methods: Both eyes of 14 preterm neonates at risk for ROP were examined by 18 MHz PWUS. All but two subjects had a follow-up examination. PWUS was acquired for 1.5 seconds at 3000 compound B-scans/sec. Data were postprocessed to form color-flow images and spectrograms depicting flow velocity in the central retinal artery (CRA), central retinal vein (CRV), and the short posterior ciliary arteries (SPCA). Flow parameters derived from spectrograms were compared by ROP stage. Results: ROP stage was found to correlate with flow velocities. Velocities were significantly elevated with respect to non-ROP eyes in all vessels at stage 3 and in the SPCAs at stage 2. Conclusions: PWUS measurement of blood flow may provide a quantitative, clinically important, and easily tolerated means for detecting and assessing the risk of ROP in preterm neonates. We speculate that the observed increase in flow velocity results from elevated vascular endothelial growth factor (VEGF) in ROP eyes. Translational Relevance: PWUS offers a gentle, nonmydriatic method for monitoring neonates at risk for ROP that would complement ophthalmoscopy.

Original languageEnglish (US)
Article number22
Pages (from-to)1-9
Number of pages9
JournalTranslational Vision Science and Technology
Volume10
Issue number2
DOIs
StatePublished - 2021
Externally publishedYes

Keywords

  • Blood flow
  • Dopple
  • Eye
  • Plane-wave
  • Retinopathy of prematurity
  • Ultrasound

ASJC Scopus subject areas

  • Biomedical Engineering
  • Ophthalmology

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