Relationship Between Preoperative Inflammation Ratios Derived From Preoperative Blood Cell Count and Postoperative Pulmonary Complications in Patients Undergoing Lobectomy: A Single-Center Observational Study

Objective: Evaluation of the association of inflammatory cell ratios, especially neutrophil-to-lymphocyte ratio (NLR), based on preoperative complete blood counts, with postoperative complications in lobectomy surgery. Design: This was a retrospective monocentric cohort study. Setting: The study was conducted at Foch University Hospital in Suresnes, France. Participants: Patients having undergone a scheduled lobectomy from January 2018 to September 2021. Interventions: There were no interventions. Measurements and Main Results: The authors studied 208 consecutive patients. Preoperative NLR, monocyte-to-lymphocyte ratio, platelet -to -lymphocyte ratio, systemic inflammation index, systemic inflammation response index, and aggregate inflammation systemic index were calculated. Median and (IQR) of NLR was 2.67 (1.92-3.69). No statistically significant association was observed between any index and the occurrence of at least one major postoperative complication, which occurred in 37% of the patients. Median postoperative length of stay was 7 (5-10) days. None of the ratios was associated with prolonged length of stay (LOS), defined as a LOS above the 75th percentile. Conclusions: The results suggested that simple available inflammatory ratios are not useful for the preoperative identification of patients at risk of postoperative major complications in elective lobectomy surgery. (c) 2023 Elsevier Inc. All rights reserved.