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Cerebral hemodynamic effects of treatment with modified natural surfactant investigated by near infrared spectroscopy.

Edwards, AD; McCormick, DC; Roth, SC; Elwell, CE; Peebles, DM; Cope, M; Wyatt, JS; ... Reynolds, EO; + view all (1992) Cerebral hemodynamic effects of treatment with modified natural surfactant investigated by near infrared spectroscopy. Pediatr Res , 32 (5) pp. 532-536. 10.1203/00006450-199211000-00007.

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Abstract

The purpose of this study was to investigate the effects on cerebral hemodynamics of administering modified natural surfactant (Curosurf, 200 mg.kg-1) to infants requiring mechanical ventilation for hyaline membrane disease. Observations were made using near infrared spectroscopy on 20 infants for between 26 and 109 (median 57) min before and 22 to 112 (median 46) min after surfactant instillation. Changes in cerebral oxyhemoglobin concentration and cerebral blood volume (CBV) were monitored continuously; cerebral blood flow, oxygen delivery, and the response of CBV to changes in arterial carbon dioxide tension were measured while the infants were stable shortly before and after surfactant was given. Cerebral oxyhemoglobin concentration fell transiently in all infants immediately after surfactant by a median of -0.21 (range -0.46 to 0.05) mL x 100 g-1, but quickly recovered so that the median change during the 10 min after surfactant was 0.01 (-0.46 to 0.46) mL x 100 g-1. Alterations in CBV also occurred ranging from -0.44 to 0.40 (median 0) mL x 100 g-1, which represented -12 to 16% of total CBV; these changes rapidly resolved. When the infants were stable before and after surfactant, the values for mean (SD) cerebral blood flow were 20.5 (7.5) and 23.1 (5.2) mL.100 g-1 x min-1, respectively (n = 9); for mean cerebral oxygen delivery, values were 2.71 (0.89) and 3.15 (0.73) mL x 100 g-1 x min-1 (n = 9); and for response of CBV to changes in arterial carbon dioxide tension, they were 0.14 (0.09) and 0.11 (0.11) mL x 100 g-1 x kPa-1 (n = 16); these changes were not statistically significant.(ABSTRACT TRUNCATED AT 250 WORDS)

Type: Article
Title: Cerebral hemodynamic effects of treatment with modified natural surfactant investigated by near infrared spectroscopy.
Location: United States
DOI: 10.1203/00006450-199211000-00007
Keywords: Blood Volume, Cerebral Hemorrhage, Cerebrovascular Circulation, Female, Hemodynamics, Humans, Hyaline Membrane Disease, Infant, Newborn, Male, Oxyhemoglobins, Pulmonary Surfactants, Spectrophotometry, Infrared
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > Inst for Women's Health
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > Inst for Women's Health > Maternal and Fetal Medicine
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/1552523
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