Inflammation increases vulnerability to hypoxia in newborn piglets:: Effect of reoxygenation with 21% and 100% O2

被引:7
作者
Lyng, K [1 ]
Braakhuis, M
Froen, JF
Stray-Pedersen, B
Saugstad, OD
机构
[1] Univ Oslo, Natl Hosp, Rikshosp, Dept Pediat Res, N-0027 Oslo, Norway
[2] Univ Oslo, Natl Hosp, Rikshosp, Dept Obstet & Gynaecol, N-0027 Oslo, Norway
[3] Univ Oslo, Natl Hosp, Rikshosp, Inst Surg Res, N-0027 Oslo, Norway
关键词
cerebral metabolism; hypoxia; intrauterine inflammation; pigs; resuscitation; oxygen treatment;
D O I
10.1016/j.ajog.2004.11.058
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
Objective: The purpose of this study was to assess whether inflammation increases vulnerability to hypoxia, and influences the effect of 100% O-2 and 21% O-2 reoxygenation on brain. Study design: Newborn piglets (n = 31) were randomized to 4 interventional groups: pretreatment with saline or endotoxin. After hypoxia they were reoxygenated with 21% or 100% oxygen for 30 minutes, followed by 21% oxygen for all groups. To assess brain injury we measured extracellular brain tissue glucose, glycerol, and lactate/pyruvate by microdialysis, brain tissue oxygen tension, and laser Doppler flow. Results: Administration of endotoxin reduced the time to reach base excess (BE) -20 mmol/L by median 32 minutes compared with saline (P <.05). We found no differences in changes in biochemical markers, brain tissue microcirculation, or oxygen tension between piglets in the 4 groups. Conclusion: Endotoxin and hypoxia acted synergistically in inducing metabolic acidosis. In the presence of experimental inflammation, 21% oxygen seems as effective as 100% O-2 in reoxygenating piglets. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:1172 / 1178
页数:7
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