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Phone: (843) 766-6635
Main Library
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Folly Beach Library
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Phone: (843) 588-2001
John L. Dart Library
9 a.m. - 6 p.m.
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St. Paul's/Hollywood Library
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Capillary leak syndrome in children with C4A-deficiency undergoing cardiac surgery with cardiopulmonary bypass: a double-blind, randomized controlled study.
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- Author(s): Shihai Zhang; Shouyong Wang; Qing Li; Shanglong Yao; Bangxiong Zeng; Ziegelstein, Roy C.; Qinghua Hu
- Source:
Lancet. 8/13/2005, Vol. 366 Issue 9485, p556-562. 7p. 1 Diagram, 3 Charts, 8 Graphs. - Source:
- Additional Information
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- Subject Terms:
- Abstract: Summary Background Capillary leak syndrome is a life-threatening complication after cardiopulmonary bypass (CPB), with an incidence of about 4-37% in children worldwide. On the basis of previous results, we undertook a randomized controlled study to investigate the priming with plasma rich in the C4A isotype of complement component 4 on the incidence of capillary leak syndrome in children with C4A deficiency. Methods In a hospital in Wuhan, China, we randomly assigned 116 neonates, infants, and children lacking complement component C4A to receive C4A-free or C4A-rich plasma priming (n=58 each, 20 mL/kg). The primary outcome was capillary leak syndrome, identified as an increased transvascular escape rate of Evans blue dye from plasma. Concentrations of activated complement components C4 and C3, inflammatory mediators interleukin 6, interleukin 8, tumor necrosis factor (TNF) α, plasma protein, and PaO2/FIO2 ratios (ratio of the partial arterial pressure of oxygen to the fractional concentration of oxygen in inspired air) were measured before and 4 h after CPB. Analysis was by intention to treat. Findings Three (5%) patients given C4A-rich plasma priming had capillary leak syndrome compared with 56 (97%) given C4A-free plasma (p<0·0001). At 4 h after CPB, activated C4, interleukin 6, interleukin 8, and TNFα concentrations were higher, whereas PaO2/FIO2 ratios and plasma protein concentrations were significantly lower in the C4A-free group than changes in the C4A-rich group. Activated C3 rose equally in both groups. Activated C4 significantly correlated with interleukin 6, interleukin 8, and TNFα concentrations; PaO2/FIO2 ratios; and the escape rate of Evans blue dye at 4 h after CPB. Two patients in the C4A-free group died of respiratory and renal failure on day 3 after CPB. Interpretation In paediatric patients with C4A deficiency, C4A-rich plasma priming reduces the incidence of CPB-related capillary leak syndrome by blocking the activated C4 increase and attenuating the systemic inflammatory response after CPB. [ABSTRACT FROM AUTHOR]
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