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• W1953669094 abstract "Altered cerebral perfusion from impaired autoregulation may contribute to the morbidity and mortality associated with premature birth. We hypothesized that fast Doppler imaging could provide a reproducible bedside estimation of cerebral perfusion and autoregulation in preterm infants. This is a prospective pilot study using fast Doppler ultrasound to assess blood flow velocity in the basal ganglia of 19 subjects born at 26–32 wk gestation. Intraclass correlation provided a measure of test–retest reliability, and linear regression of cerebral blood flow velocity and heart rate or blood pressure allowed for estimations of autoregulatory ability. The intraclass correlation when imaging in the first 48 h of life was 0.634. We found significant and independent correlations between the systolic blood flow velocity and both systolic blood pressure and heart rate (P = 0.015 and 0.012 respectively) only in the 26–28 wk gestational age infants in the first 48 h of life. Our results suggest that fast Doppler provides reliable bedside measurements of cerebral blood flow velocity at the tissue level in premature infants, acting as a proxy for cerebral tissue perfusion. Additionally, autoregulation appears to be impaired in the extremely preterm infants, even within a normal range of blood pressures." @default.
• W1953669094 created "2016-06-24" @default.
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• W1953669094 date "2015-11-05" @default.
• W1953669094 modified "2023-09-25" @default.
• W1953669094 title "Fast Doppler as a novel bedside measure of cerebral perfusion in preterm infants" @default.
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• W1953669094 doi "https://doi.org/10.1038/pr.2015.227" @default.
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