Relationship Between Fluid Therapy Strategies and Mortality Among Sepsis Patients in ICU with high CVP: A Retrospective Analysis of the eICU Database
Abstract Objective: It is still debated whether sepsis patients with high CVP (central venous pressure) benefit from it. We performed a retrospective study of sepsis patients with CVP ≥ 12 mmHg to analyze mortality resulting from the different amounts of fluid administered in the fluid therapy at the first 6, 24, and 48 h of the course.Methods: This study included sepsis patients from the eICU database who met the sepsis-3 diagnostic criteria and showed CVP ≥ 12 mmHg on admission. We analyzed the differences between the survivors and the non-survivors at baseline and the difference in fluid balance at 6, 24, and 48 h. Restricted cubic spline (RCS) and logistic regression model were used to identify the association between fluid balance and mortality.Results: Out of the 1150 sepsis patients that showed a high CVP obtained from the eICU database, 847 were survivors and 303 were non-survivors. Compared to survivors, non-survivors had a larger positive fluid balance at 6, 24, and 48 h. The fluid balance and mortality in sepsis patients with high CVP showed an inverted U-type relationship. At 6 h, lower mortality was found in patients who required less than -5 ml/kg fluid therapy. At 24 h, mortality was the lowest at -40~-20 ml/kg. At 48 h, low mortality was observed in patients with < -40 ml/kg fluid balance. In septic shock patients with high CVP, positive balance decrease mortality. In sepsis patients with high CVP without a history of chronic heart failure, and with a history of heart failure negative fluid balance can decrease mortality.Conclusion: In the sepsis group without shock, achieving negative fluid balance possible may significantly improve the prognosis of patients with high CVP, and patients with no history of chronic heart failure and patients with history of chronic heart failure should limit fluid infusion. In patients with septic shock whose CVP ≥ 12 mmHg, positive fluid balance may decrease mortality.