Introduction: The present study aimed to investigate the role of plasma presepsin in the early detection of septic shock and in determining the prognosis and mortality of patients with sepsis. Methodology: The study was conducted in the emergency department between 1 January 2017 and 1 July 2017. A total of 106 patients 18 years of age or older who were diagnosed with sepsis according to the quick sequential organ failure assessment (qSOFA) criteria were included in this prospective study. The patients’ symptoms, vital signs, additional diseases, demographic attributes, laboratory results, Mortality in Emergency Department Sepsis (MEDS) scores, imaging findings and treatments were recorded. Moreover, the patients’ blood samples were collected to measure plasma presepsin, procalcitonin and CRP levels. Results: In total, 55.7% of the patients were female. The median age of the patients was 78 (24–103) years, and their 30-day mortality rate was 67%. The presepsin level was significantly higher in the sepsis group than in the healthy control group (p < 0.001). The presepsin levels did not differ significantly between the sepsis and septic shock groups (p = 0.12). Similarly, the procalcitonin levels did not differ significantly between the sepsis and septic shock groups (p > 0.05). There was no significant difference in the presepsin, procalcitonin and CRP levels between survivor and non-survivor patients (p = 0.74). Conclusions: The plasma presepsin level was found to be ineffective in determining the incidence of septic shock and mortality in patients with sepsis in the emergency department.

To analyze the prognostic value of serum presepsin value in community-acquired pneumonia focal sepsis using sepsis-3 criteria and its relationship with other biomarkers and clinical severity scores. Methods:For this prospective observational study, 176 patients above 18 years old, diagnosed with community-acquired pneumonia, pneumonia focal sepsis and septic shock were included. It was performed in a tertiary hospital between May 2020 and December 2020. Blood samples were obtained from patients for presepsin levels at the time of diagnosis in the emergency room. The serum presepsin levels of 3 groups were statistically compared with each other. Original ArticleResults: The sepsis group had significantly higher serum presepsin levels than the pneumonia group )p=0.004(.The septic shock group had serum presepsin levels than sepsis group; however, the difference was not statistically significant )p=0.25(. Non survivor patients had significantly higher serum presepsin levels than survivors )p=0.001(. Significant correlation determined between serum presepsin level and procalcitonin, C-reactive protein, lactate, pneumonia severity index, and quick sequential organ failure assessment )qSOFA(. Conclusion:Serum presepsin level is a new biomarker that can be used an indicator of sepsis and mortality in community-acquired pneumonia. However, for determining the prognosis of sepsis, there was no superiority detected over other biomarkers and clinical severity scores.