Immunoglobulin G treatment of postcardiac surgery patients with score-identified severe systemic inflammatory response syndrome - The ESSICS study

Objective: A minority of patients develop severe systemic inflammatory response syndrome (SIRS) with high mortality following cardiopulmonary bypass-assisted cardiac surgery. We assessed whether intravenous immunoglobulin G (ivIgG) improves postoperative short-term (5-day) morbidity and reduces 28-day mortality in these patients. Design. Randomized, double-blind, placebo-controlled, multicenter trial. Setting. Intensive care units of 11 cardiothoracic centers. Patients and interventions. Of 6,984 patients screened, we identified 244 with severe SIRS (Acute Physiology and Chronic Health Evaluation 11 score :28 on the first postoperative day). Interventions, The 244 patients with severe SIRS were randomly assigned to receive an intravenous infusion of either albumin 0.1% (placebo group, 6 mL [6 mg]/kg of body weight on day 1 and 3 mL [3 mg]/kg of body weight on day 2) or immunoglobulin G 10% (ivIgG group, 6 mL [600 mg]/kg of body weight on day 1 and 3 mL [300 mg]/kg of body weight on day 2). Measurements and Main Results. The prospectively defined primary end points were improvement in morbidity on day 5 and death from any cause assessed on day 28. A total of 218 patients received both doses of the study drug (placebo n = 108, ivIgG n = 110). Acute Physiology and Chronic Health Evaluation 11 scores in the placebo group decreased from 31.8 +/- 4.0 (day 1) to 25.8 +/- 9.3 (day 5) and in the ivIgG group from 31.8 +/- 3.4 (day 1) to 25.9 +/- 10.3 (day 5), with no significant difference between the groups (p =.56). The 28-day mortality rate was not significantly different between the groups (per protocol population, placebo group 31.5%, ivIgG group 39.1%; intent-to-treat population, placebo group 37.2%, ivIgG group: 44.7%). No effect of ivIgG on plasma levels of interleukin-6, tumor necrosis factor, and tumor necrosis factor receptor I/II was observed. Drug-related adverse events were rare in both groups. Conclusions. Patients undergoing cardiac surgery (involving cardiopulmonary bypass) who develop severe SIRS derive no improvement in short-term morbidity or 28-day mortality from ivIgG.