• Gerrit Jansen, Linda Irmscher, Theodor W May, Rainer Borgstedt, Jakob Popp, Sean S Scholz, and Sebastian W Rehberg.
• Department of Anesthesiology, Intensive Care, Emergency Medicine, Transfusion Medicine, and Pain Therapy, Protestant Hospital of the Bethel Foundation, Bielefeld University Hospital, Campus Bielefeld-Bethel, University of Bielefeld, Burgsteig 13, 33617 Bielefeld, Germany. Electronic address: Gerrit.Jansen@evkb.de.
• J Clin Anesth. 2021 Oct 1; 73: 110366.

Study ObjectiveTo determine 30-day-mortality, incidence and characteristics of perioperative cardiac arrest as well as the respective independent risk factors in preterm infants undergoing non-cardiac surgery.DesignRetrospective observational Follow-up-study.SettingBielefeld University Hospital, a German tertiary care hospital.PatientsPopulation of 229 preterm infants (age < 37th gestational week at the time of surgery) who underwent non-cardiac surgery between 01/2008-12/2018.MeasurementsPrimary endpoint was overall 30-day-mortality. Secondary endpoints were the incidence of perioperative cardiac arrest and identification of independent risk factors. We performed univariate and multivariate analyses and calculated odds ratios (OR) for risk factors associated with these endpoints.Main Results30-day-mortality was 10.9% and perioperative mortality 0.9%. Univariate risk factors for 30-day-mortality were perioperative cardiac arrest (OR,12.5;95%CI,3.1 to 50.3), comorbidities of lungs (OR,3.7;95%CI,1.2 to 11.3) and gastrointestinal tract (OR,3.5;95%CI,1.3 to 9.6); sepsis (OR,3.6;95%CI,1.4 to 9.5); surgery between 22:01-7:00 (OR,7.3;95%CI,2.4 to 21.7); emergency (OR,4.5;95%CI,1.6 to 12.4); pre-existing catecholamine therapy (OR,5.0;95%CI,2.1 to 11.9). Multivariate logistic regression indicated that perioperative cardiac arrest (OR,13.9;95%CI,2.7 to 71.3), low body weight (weight < 1000 g: OR,26.0;95%CI,3.2 to 212; 1000-1499 g: OR,10.3; 95%CI,1.1 to 94.9 compared to weight > 2000 g), and time of surgery (OR,5.9;95%CI,1.6 to 21.3) for 22:01-7:00 compared to 7:01-15:00) were the major independent risk factors of mortality. Incidence of perioperative cardiac arrests was 3.9% (9 of 229;95%CI,1.8 to 7.3). Univariate risk factors were congenital anomalies of the airways (OR,4.7;95%CI,1.2 to 20.3), lungs (OR,4.7;95%CI,1.2 to 20.3) and heart (OR,8.0;95%CI,2 to 32.2), pre-existing catecholamine therapy (OR,59.5;95%CI,3.4 to 1039), specifically, continuous infusions of epinephrine (OR,432;95%CI,43.2 to 4318).Conclusions30-day-mortality and the incidence of perioperative cardiac arrest of preterms undergoing non-cardiac surgery were higher than previously reported. The identified independent risk factors may improve interdisciplinary perioperative risk assessment, optimal preoperative stabilization and scheduling of optimal surgical timing.Copyright © 2021 Elsevier Inc. All rights reserved.

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