Interleukin-8 secretion following cardiopulmonary bypass in children as a marker of early postoperative morbidity.
BACKGROUND
Interleukin (IL)-8, an 8 kDa peptide, is the first chemoattractant identified as being specific for neutrophils. Its possible association with early postoperative morbidity following cardiopulmonary bypass (CPB) in infants and children is unknown. This prospective cohort study sought possible roles of IL-8 in the inflammatory response to CPB and investigated if changes in IL-8 levels and clinical course and outcome were related.


METHODS
IL-8 levels were measured in 16 children undergoing CPB. Systemic blood was collected after induction of anaesthesia (baseline), at 15 min after CPB onset and cessation, and at 1, 4, 8, 12 and 24 h thereafter.


RESULTS
Correlation coefficients between IL-8 levels and CPB time ranged from 0.45 to 0.55, heart rate 0.41--0.44, surgical time 0.41--0.63 and pH --0.56 to --0.50 (P < 0.05 for all parameters). Univariate analyses showed that patients requiring inotropic support and those with tachycardia had significantly higher postoperative IL-8 levels (P < 0.05). Furthermore, IL-8 levels were significantly higher in patients with surgical times > 200 min and in patients with an aortic clamp in place for > 65 min.


CONCLUSIONS
There was an association between IL-8 and early postoperative heart rate, and the need for inotropic support IL-8 correlated positively with surgical time, CPB time and heart rate and negatively with pH. IL-8 release may be related to some of the haemodynamic changes in the early postoperative course following CPB. The relationship between IL-8 and late markers of patient outcome in high-risk infants awaits further studies.
Ben-Abraham
Ron
R
Department of Anesthesiology and Critical Care Medicine, Tel-Aviv Sourasky Medical Center, Israel.
Weinbroum
Avi A
AA
Lotan
Danny
D
Dagan
Ovdi
O
Schreriber-Scheffer
Rivka
R
Mishali
David
D
Harel
Ran
R
Vishne
Tali
T
Barzilay
Zohar
Z
Paret
Gideon
G
D006348:Cardiac Surgical Procedures; D002315:Cardiopulmonary Bypass; D002648:Child; D005260:Female; D006801:Humans; D007249:Inflammation / Q000276:immunology; D016209:Interleukin-8 / Q000378:metabolism*; D008297:Male; D011183:Postoperative Complications / Q000175:diagnosis* / Q000276:immunology; D011446:Prospective Studies
D016209:Interleukin-8