Gut Microbiota Analysis in IAI Patients With Sepsis-associated Liver Dysfunction

A retrospective cohort study was conducted involving sepsis patients with IAI treated in ICU department of Nanjing Drum Tower Hospital between April 2020 to April 2020. Adult patients (≥18 years) with IAI who met the criteria for sepsis 3.0 were included. The exclusion criteria included: discharged or died within 48 hours after ICU admission; known serious chronic liver disease, such as decompensated cirrhosis and end-stage liver cancer; hospitalization due to primary hepatobiliary disease, such as trauma, hepatitis, cholelithiasis, etc; other causes of liver injury include: drugs, poisons, etc; and pregnancy.The following data were collected within 24 hours after ICU admission: demographic Information: age, sex and comorbidity; the score of disease severity: Acute Physiology and Chronic Health Evaluation (APACHE) II score; Sequential Organ Failure Assessment (SOFA) score; the primary site of abdominal infection: upper or lower gastrointestinal tract, pancreas and others; laboratory indicators: white blood cells (WBC), percentage of neutrophils (N%), C-reactive protein (CRP), procalcitonin (PCT), human leukocyte antigen (HLA)-DR. Date during hospitalization were also collected: complications: respiratory failure, septic shock, acute kidney injury (AKI) and AGI; pathogenic bacteria of ascites culture; bacteremia or not; total parenteral nutrition (TPN) was given or not. Prognostic indicators included ICU length of stay (LOS), hospital LOS, ICU mortality, in-hospital mortality, and 28-day mortality were also recorded.SALD was diagnosed when the level of serum alanine aminotransferase (ALT) or aspartate aminotransferase (AST) ≥ 1000IU/L, or total bilirubin (TBIL) level >3mg/dL during hospitalization. IAI was diagnosed according to the 2005 International Sepsis Forum Consensus Conference. Briefly, the patient present with abdominal symptoms and signs, such as fever (≥38℃), tenderness, rebound pain, etc; elevated inflammatory indicators in peripheral blood and positive culture of intra-abdominal specimens. Sepsis 3.0 and septic shock were diagnosed according to Third International Consensus Definition for Sepsis and Septic Shock in 2016. AKI was diagnosed according to the Kidney Disease Improving Global Outcomes (KDIGO) clinical practice guidelines. AGI diagnosis and grading are based on the ESICM recommendations in 2012.To further clarify the relationship between gut microbiota and SALD, we conducted a prospective observational study between April 2020 to April 2020 in our center. Eligible patients must fulfill the same criteria as above. Other exclusion criteria also include: with expected ICU LOS \< 1 week; had participated in any other clinical trial; underwent enterostomy surgery; had chronic inflammatory bowel disease. All eligible patients were given antibiotics therapy, actively control infection source by puncture drainage or surgery if necessary, as well as other supportive therapy to maintain organ function. Moreover, fecal samples were collected per patient on days 1,3 and 7 after ICU admission. Other data collection and the definition of related diseases are the same as the above.