Fluid administration in cytoreductive surgery with hyperthermic intraperitoneal chemotherapy: neither too much nor too little

Introduction: Intraoperative fluid therapy in cytoreductive surgery with hyperthermic intraperi-toneal chemotherapy plays an important role in postoperative morbidity. Studies have found an association between overload fluid therapy and increased postoperative complications, advis-ing restrictive intraoperative fluid therapy. Our objective in this study was to compare the morbidity associated with restrictive versus non-restrictive intraoperative fluid therapy.Methods: Retrospective analysis of a database collected prospectively in the Anesthesiology Service of Virgen del Rocio Hospital, from December 2016 to April 2019. One hundred and six patients who underwent complete cytoreductive surgery and hyperthermic intraperitoneal chemotherapy were divided into two cohorts according to Fluid Therapy received 1. Restric-tive <= 9 mL.kg-1.h-1 (34 patients), 2. Non-restrictive >= 9 mL.kg-1.h-1 (72 patients). Percentage of major complications (Clavien-Dindo grade III -IV) and length hospital stay were the main outcomes variables.Results: Of the 106 enrolled patients, 68.9% were women; 46.2% had ovarian cancer, 35.84% colorectal cancer, and 7.5% peritoneal cancer. The average fluid administration rate was 11 +/- 3.58 mL.kg-1.h-1. The restrictive group suffered a significantly higher percentage of Clavien-Dindo grade III --IV complications (35.29%) compared with the non-restrictive group (15.27%) (p = 0.02). The relative risk associated with restrictive therapy was 1.968 (95% confi-dence interval: 1.158-3.346). We also found a significant difference for hospital length of stay, 20.91 days in the restrictive group vs 16.19 days in the non-restrictive group (p = 0.038).Conclusions: Intraoperative fluid therapy restriction below 9 mL.kg-1.h-1 in cytoreductive surgery with hyperthermic intraperitoneal chemotherapy was associated with a higher per-centage of major postoperative complications.(c) 2021 Sociedade Brasileira de Anestesiologia. Published by Elsevier Editora Ltda. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).