#807 Presepsin and procalcitonin levels are associated with acute kidney injury in sepsis patients

Abstract Background and Aims Acute kidney injury (AKI) is a leading cause of death in patients with sepsis. Presepsin is a novel biomarker which has been used to predict sepsis and the outcomes of sepsis. Presepsin was also demonstrated in a small clinical trial to be associated with AKI in sepsis patients. Procalcitonin is a biomarker which was well-studied in sepsis and AKI patients. We aimed to study the association of presepsin and procalcitonin with AKI and outcomes of AKI in sepsis patients. Method We conducted a multicenter prospective trial in eight tertiary-care hospitals in Thailand. We included suspected sepsis patients aged 18 years or older who entered the emergency room during January 2021 to July 2022. We excluded patients with pregnancy, previous trauma, and postcardiac arrest. We also excluded dialysis patients and patients with estimated glomerular filtration rate (eGFR) less than 30 ml/min/1.73 m2 from our study. We measured blood presepsin and procalcitonin at day 0, 3 and 7 along with other investigation for usual intensive care of sepsis. We calculated the level of presepsin and procalcitonin that could distinguish between sepsis patients with and without AKI. We also analyzed whether presepsin and procalcitonin were associated between severity of AKI determined by Kidney Disease: Improving Global Outcomes (KDIGO) staging of AKI. Results We recruited 621 patients who was diagnosed sepsis at emergency department. AKI was diagnosed in 246 patients (39.6%). Of these AKI patients, maximal KDIGO stage of AKI were stage 1, 2 and 3 in 140 (56.9%), 64 (26.0%) and 42 (17.1%) patients, respectively. The median age was 70.1 years with 54.6% was male patients. The median BMI was 21.9 kg/m2. The median Charlson comorbidity index (CCI) was 5 (IQR 4-7). The median presepsin level in AKI patients was 1012 pg/mL (IQR 528-1719 pg/mL), which was significantly higher (P < 0.001) than the median presepsin level in non-AKI patients, which was 594 pg/mL (IQR 337-1138 pg/mL). The median procalcitonin level in AKI patients was 1.24 ng/mL (IQR 0.22-6.06 ng/mL), which was significantly higher (P < 0.001) than the median presepsin level in non-AKI patients, which was 0.50 ng/mL (IQR 0.09-2.34 ng/mL). The cut-point of presepsin level and the procalcitonin level of ≥795 pg/mL and ≥0.9 ng/mL was associated with AKI in sepsis patients respectively. The higher level of presepsin and procalcitonin also significantly associated with higher KGIDO staging of AKI as shown in Fig. 1. However, the mortality rate in both groups were not significantly different (24.0% in AKI group vs. 21.1% in non-AKI group, P = 0.39) Conclusion To date, this is one of the largest studies to evaluate the association between presepsin level, procalcitonin level and AKI in sepsis patients. The presepsin level and the procalcitonin level of ≥795 pg/mL and ≥0.9 ng/mL was associated with AKI in sepsis patients respectively.