• Petring HasselagerRuneR0000-0003-0384-2521Center for Surgical Science, Zealand University Hospital, Koege, Denmark., Bang FossNicolaiNDepartment of Anesthesiology and Intensive Care, Hvidovre Hospital, Hvidovre, Denmark., Ove Andersen, Mirjana Cihoric, Morten Bay-Nielsen, Hans J Nielsen, Camilla AndresenLindaLDepartment of Clinical Research and the Emergency Department, Hvidovre Hospital, Hvidovre, Denmark., and Line Toft Tengberg.
• Center for Surgical Science, Zealand University Hospital, Koege, Denmark.
• Acta Anaesthesiol Scand. 2021 Feb 1; 65 (2): 151-161.

BackgroundEmergency laparotomy is associated with high risk of postoperative complications and mortality. Preoperative identification of patients at high risk of adverse outcome is important. The immune response to conditions requiring emergency laparotomy is not understood in detail. The present study describes preoperative blood-based immune profiles and their potential value in surgical risk assessment.MethodPatients (N = 100) referred for emergency laparotomy at Hvidovre Hospital were consecutively included from 3 June 2013-11 April 2014. All patients had blood samples collected before surgery and the immune parameters c-reactive protein (CRP), Interleukin-6 (IL-6), Interleukin-10 (IL-10), interferon-γ induced protein 10 kDa (IP-10), tumor necrosis factor α (TNF-α) and soluble urokinase plasminogen receptor activator (suPAR) were determined. Patients were stratified according to major postoperative complications (including death), 30- and 180-day mortality. Using logistic regression models and receiver operating characteristics curves the predictive ability of the immune parameters were estimated.ResultsMajor complications were recorded in 45 (45.0%) of the patients, whereas 30-day and 180-day mortalities were 17 (17.0%) and 25 (25.0%), respectively. Concentrations of suPAR and TNF-α were associated with major complications while CRP, IL-6, suPAR and TNF-α were associated with mortality. Adding the combined immune parameters to a regression model including age, sex, American Society of Anesthesiologists physical status and Eastern Cooperative Oncology Group Performance Status significantly improved the predictive ability for major complications, 30-day mortality and 180-day mortality.ConclusionIn emergency laparotomy, preoperative blood-based immune parameters added predictive power to regression models and could be considered in risk prediction model development.© 2020 The Acta Anaesthesiologica Scandinavica Foundation. Published by John Wiley & Sons Ltd.

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