Christina H Shin1, Dustin R Long1, Duncan McLean1,2, Stephanie D Grabitz1, Karim Ladha3, Fanny P Timm1, Tharusan Thevathasan1, Alberto Pieretti4, Cristina Ferrone4, Andreas Hoeft5, Thomas W L Scheeren6, Boyd Taylor Thompson7, Tobias Kurth8,9, Matthias Eikermann1. 1. Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, MA. 2. Department of Anesthesiology, University of Rochester Medical Center, Rochester, NY. 3. Department of Anesthesia, Toronto General Hospital and University of Toronto, Toronto, Canada. 4. Department of Surgery, Massachusetts General Hospital, Boston, MA. 5. Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany. 6. Department of Anesthesiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands. 7. Department of Medicine, Massachusetts General Hospital, Boston, MA. 8. Institute of Public Health, Charité Universitätsmedizin, Berlin, Germany. 9. Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
Abstract
OBJECTIVE: Evaluate the dose-response relationship between intraoperative fluid administration and postoperative outcomes in a large cohort of surgical patients. BACKGROUND: Healthy humans may live in a state of fluid responsiveness without the need for fluid supplementation. Goal-directed protocols driven by such measures are limited in their ability to define the optimal fluid state during surgery. METHODS: This analysis of data on file included 92,094 adult patients undergoing noncardiac surgery with endotracheal intubation between 2007 and 2014 at an academic tertiary care hospital and two affiliated community hospitals. The primary exposure variable was total intraoperative volume of crystalloid and colloid administered. The primary outcome was 30-day survival. Secondary outcomes were respiratory complications within three postoperative days (pulmonary edema, reintubation, pneumonia, or respiratory failure) and acute kidney injury. Exploratory outcomes were postoperative length of stay and total cost of care. Our models were adjusted for patient-, procedure-, and anesthesia-related factors. RESULTS: A U-shaped association was observed between the volume of fluid administered intraoperatively and 30-day mortality, costs, and postoperative length of stay. Liberal fluid volumes (highest quintile of fluid administration practice) were significantly associated with respiratory complications whereas both liberal and restrictive (lowest quintile) volumes were significantly associated with acute kidney injury. Moderately restrictive volumes (second quintile) were consistently associated with optimal postoperative outcomes and were characterized by volumes approximately 40% less than traditional textbook estimates: infusion rates of approximately 6-7 mL/kg/hr or 1 L of fluid for a 3-hour case. CONCLUSIONS: Intraoperative fluid dosing at the liberal and restrictive margins of observed practice is associated with increased morbidity, mortality, cost, and length of stay.
OBJECTIVE: Evaluate the dose-response relationship between intraoperative fluid administration and postoperative outcomes in a large cohort of surgical patients. BACKGROUND: Healthy humans may live in a state of fluid responsiveness without the need for fluid supplementation. Goal-directed protocols driven by such measures are limited in their ability to define the optimal fluid state during surgery. METHODS: This analysis of data on file included 92,094 adult patients undergoing noncardiac surgery with endotracheal intubation between 2007 and 2014 at an academic tertiary care hospital and two affiliated community hospitals. The primary exposure variable was total intraoperative volume of crystalloid and colloid administered. The primary outcome was 30-day survival. Secondary outcomes were respiratory complications within three postoperative days (pulmonary edema, reintubation, pneumonia, or respiratory failure) and acute kidney injury. Exploratory outcomes were postoperative length of stay and total cost of care. Our models were adjusted for patient-, procedure-, and anesthesia-related factors. RESULTS: A U-shaped association was observed between the volume of fluid administered intraoperatively and 30-day mortality, costs, and postoperative length of stay. Liberal fluid volumes (highest quintile of fluid administration practice) were significantly associated with respiratory complications whereas both liberal and restrictive (lowest quintile) volumes were significantly associated with acute kidney injury. Moderately restrictive volumes (second quintile) were consistently associated with optimal postoperative outcomes and were characterized by volumes approximately 40% less than traditional textbook estimates: infusion rates of approximately 6-7 mL/kg/hr or 1 L of fluid for a 3-hour case. CONCLUSIONS: Intraoperative fluid dosing at the liberal and restrictive margins of observed practice is associated with increased morbidity, mortality, cost, and length of stay.
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