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Thomas Sautner, MD; Peter Götzinger, MD; Eva-Maria Redl-Wenzl, MD; Klaus Dittrich, MD; Michael Felfernig; Paul Sporn, MD; Erich, PhD; Reinhold Függer, MD

Arch Surg. 1997;132(3):250-255.

Abstract
Objective
To determine the effect of reoperation for severe abdominal sepsis on the course of proinflammatory mediators and hemodynamic factors.

Design
Inception cohort.

Setting
A university hospital and a secondary care hospital.

Patients and Methods
Fifteen patients suffering from severe peritonitis due to intestinal perforation or infected necrotizing pancreatitis were studied following 19 subsequent operations. Plasma samples were obtained immediately before and after reoperation, as well as at 1, 3, 6, 12, and 24 hours after operation to determine endotoxin, tumor necrosis factor , and interleukin-6 levels. Clinical factors and therapeutic support were recorded at the corresponding times.

Main Outcome Measures
Postoperative hemodynamic instability as defined by changes of the mean arterial pressure, pulmonary capillary wedge pressure, and vasopressor support. Courses of proinflammatory mediators were correlated to the hemodynamic findings.

Results
Mean arterial pressure decreased from 94 mm Hg postoperatively to 80 mm Hg at 3 hours (P=.006) and 81 mm Hg at 6 hours postoperatively (P=.005). Pulmonary capillary wedge pressure dropped from 14 mm Hg postoperatively to 12 mm Hg at 1 hour (P=.05). Vasopressor support significantly increased from 1 to 6 hours postoperatively (P=.02). Neither endotoxin nor tumor necrosis factor levels showed significant changes in the postoperative course. Interleukin-6 levels continously increased from 586 pg/mL preoperatively to 910 pg/mL at 1 hour (P=.02) and 931 pg/mL at 3 hours postoperatively (P=.04). Overall interleukin-6 levels (R=–0.38, P=.003) and especially early postoperative interleukin-6 levels inversely correlated with postoperative mean arterial pressure.

Conclusions
Reoperation for abdominal sepsis frequently causes substantial hypotension, and is, thus, potentially harmful to the patient. Reoperative trauma may induce an early postoperative increase in interleukin-6 levels. Because this increase occurs before the development of hypotension, a relationship between the kinetics of this cytokine and the observed hemodynamic instability may be present.

Arch Surg. 1997;132:250-255

Author Affiliations
From the Departments of Surgery (Drs Sautner, Götzinger, Roth, and Függer) and Anesthesiology (Mr Felfernig), University of Vienna, and the Departments of Anesthesiology (Drs Redl-Wenzl and Sporn) and Surgery (Dr Dittrich), Krankenanstalt Rudolfstiftung Vienna, Vienna, Austria.

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