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Associations of measures of systemic blood flow used in a randomized trial of delayed cord clamping in preterm infants.

Abstract：

OBJECTIVE:To determine associations of low superior vena cava (SVC) flow (≤55 ml/kg/min) and low right ventricular output (RVO) (≤150 ml/kg/min) in preterm infants. DESIGN/METHODS:An observational study in infants <30 weeks gestation randomized to receive immediate (<10 s) or delayed cord clamping (DCC) (≥60 s). RESULTS:The study enrolled 265 infants with a mean (SD) gestation 28 (2) weeks. Eighty-six (33%) infants had low SVC flow and 81 (31%) infants had low RVO. In multivariate analysis, low SVC flow was associated with gestation; low RVO was associated with DCC, gender and 5-minute Apgar; whereas mean RVO was negatively associated with both FiO2 and mean airway pressure (MAP) at 9 h and 24 h. Low SVC flow was associated with ductus arteriosus (DA) treatment. Infants with low RVO had higher mortality on univariate analysis, but this was not significant after adjusting for gestation. CONCLUSIONS:SVC flow was associated with gestation, whilst RVO was associated with placental transfusion, gender, condition at birth, and early respiratory adaptation. Compared to infants with normal values, more infants with low SVC flow were treated for DA, but infants with low RVO had no significant difference in mortality or morbidity.

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Popat H,Robledo KP,Kirby A,Sebastian L,Evans N,Gill A,Kluckow M,Sinhal S,de Waal K,Tarnow-Mordi W,Osborn D

doi

10.1038/s41390-019-0348-1

subject

Has Abstract

pub_date

2019-07-01 00:00:00

pages

71-76

issue

1

eissn

0031-3998

issn

1530-0447

pii

10.1038/s41390-019-0348-1

journal_volume

86

pub_type

杂志文章,多中心研究,随机对照试验

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