It has been shown that crystalloid fluid-overload promotes anastomotic instability. As physiologic anastomotic healing requires the sequential infiltration of different cells, we hypothesized this to be altered by liberal fluid regimes and performed a histomorphological analysis.
36 Wistar rats were randomized into 4 groups (n=8-10 rats/group) and treated with either liberal (+) or restrictive (−) perioperative crystalline (Jonosteril® = Cry) or colloidal fluid (Voluven® = Col). Anastomotic samples were obtained on postoperative day 4, routinely stained and histophathologically reviewed. Anastomotic healing was assessed using a semiquantitative score, assessing inflammatory cells, anastomotic repair and collagenase activity.
Overall, the crystalloid overload group (Cry (+)) showed the worst healing score (P < 0.01). A substantial increase of lymphocytes and macrophages was found in this group compared to the other three (P < 0.01). Both groups that received colloidal fluid (Col (+) and Col (−)) as well as the group that received restricted crystalloid fluid resuscitation (Cry (−)) had better intestinal healing. Collagenase activity was significantly higher in the Cry (+) group.
Intraoperative infusion of high-volume crystalloid fluid leads to a pathological anastomotic inflammatory response with a marked infiltration of leukocytes and macrophages resulting in accelerated collagenolysis.
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Published online: July 22, 2013
Accepted: April 3, 2013
Birte Kulemann and Sylvia Timme equally contributed to the manuscript.
© 2013 Mosby, Inc. Published by Elsevier Inc. All rights reserved.