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Catia Rejane S. Soares, Rita C. Silveira, Renato S. Procianoy; Ophthalmic Artery Blood Flow in Very-Low-Birth-Weight Preterm Infants. Invest. Ophthalmol. Vis. Sci. 2010;51(2):708-711. doi: 10.1167/iovs.09-4206.
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To evaluate normal blood flow velocity and Doppler indices of the ophthalmic arteries from birth to hospital discharge of inborn infants at birth weights between 500 and 1500 g and gestational age ≤32 weeks.
A longitudinal prospective study with Doppler ultrasound was conducted in both eyes at 24 hours, 7 and 28 days, and hospital discharge for systolic and diastolic velocities, pulsatility, and resistance indices. Retinopathy of prematurity stage 2 and higher, peri-intraventricular hemorrhage grades 3 and 4, and death were excluded.
The authors studied 46 very-low-birth-weight infants (92 eyes; birth weight, 1215 ± 202 g; gestational age, 30.4 ± 1.3 weeks). Both eyes had similar Doppler findings at each study interval. Systolic velocity increased significantly from birth to hospital discharge (P = 0.001; right eye, 17.85 ± 5.3 cm/s and 23.18 ± 4.88 cm/s; left eye, 17.78 ± 5.19 cm/s and 23.51 ± 5.63 cm/s), as did diastolic velocity (P = 0.02; right eye, 6.17 ± 1.13 cm/s and 6.76 ± 1.12 cm/s; left eye, 6.34 ± 1.26 cm/s and 6.9 ± 1.53 cm/s). Pulsatility and resistance indices did not change during the entire period.
There is a typical pattern of ophthalmic artery systolic and diastolic blood flow velocities, and pulsatility and resistance indices during the neonatal period in very-low-birth-weight infants.
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