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  • Title: Prediction of survival in severely asphyxiated infants.
    Author: Rosenkrantz TS, Zalneraitis EL.
    Journal: Pediatr Neurol; 1991; 7(6):446-51. PubMed ID: 1797009.
    Abstract:
    There is currently no set of evaluations that allows for the accurate prediction of survival or death following severe perinatal asphyxia and the development of hypoxic-ischemic encephalopathy. We hypothesized that low cerebral blood flow velocity, as determined by Doppler ultrasonography, may predict neurologic nonviability in a group of severely asphyxiated infants who exhibited signs of severe encephalopathy. Using the staging system of Sarnat and Sarnat, 11 infants who had had severe perinatal asphyxia were studied at the time that their neurologic examinations met the criteria for stage 3 encephalopathy. Apgar scores, cord or initial blood gases and pH, blood pressure, heart rate, and electroencephalographic findings were similar between those infants who survived (N = 8) and those who died due to cerebral injury (N = 3). Cerebral blood flow velocity, however, was significantly lower in those infants who died (3,288 +/- 884 vs 1,051 +/- 789 planimeter units/min; P less than .005). All infants who died had retrograde diastolic blood flow in the common carotid artery. In the study group the combination of low cerebral blood flow velocity and retrograde diastolic blood flow in the common carotid artery allowed prediction of survival and death with sensitivity and specificity of 100% (P less than .006). Following perinatal asphyxia and the development of severe encephalopathy, the finding of low cerebral blood flow velocity appears to be predictive of neurologic nonviability.
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