Prediction of sepsis in elective surgery patents Infections and Infestations
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. Patients aged between 18 and 80 years 2. Ability to give written informed consent prior to study participation 3. Patients undergoing elective high-risk surgery (e.g. aortic vascular surgery, cardio-thoracic surgery, colonic surgery, gastrectomy, oesophago-gastrectomy, Whipple’s procedure, biliary or urological procedures) 4. ASA grades 1, 2, 3
Exclusion criteria
Exclusion criteria: 1. Pregnant patients 2. Immunosuppressed patients (e.g. HIV disease, anti-rejection medication)
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Original primary outcome: 1. Development of sepsis, measured using the “sepsis 2” criteria which is a Systemic Inflammatory Response Syndrome (SIRS) characterised by 2 of the following (measured daily for 7 days after surgery): 1.1. Temperature >38 or 20/min or PCO2 90/min after fluid resuscitation measured by clinical observation 1.4. White cell count >10 or 10% immature forms measured by blood test A clinical adjudication panel sifted blinded patient data (including all relevant patient observations and clinical data) to determine which patients adhered to this criteria and which did not. The definition of the study’s primary outcome (SEPSIS) was later changed to be defined as organ dysfunction (characterised by an increase in daily Sequential Organ Failure Assessment (SOFA) score of 2 or more from one day to the next) caused by an infectious agent. Sufficient clinical data was collected during the study to enable identification of patients who achieved the new “sepsis 3” criteria. The parameters for SOFA score include (measured using standard clinical biochemistry and haematology assays, daily for up to 7 days after surgery): 1.1. Respiratory system function (PO2/FiO2 mmHg/kPa >400 to 150 to 12.0 mg/dl) 1.4. Cardiovascular system function (MAP or medication to maintain MAP) 1.5. Central nervous system function (Glasgow Coma Score) 1.6. Renal system function (Creatinine levels 5.0 mg/dl) 2. Biomarkers in whole blood samples (collected daily for 7 days) of patients who go on to develop sepsis, assessed using gene expression measured using microarray and RT-qPCR | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. The time point at which sepsis occurred judged by a clinical advisory panel using the information collected for the primary outcome measures 2. Identification of alternative biomarkers such as proteins and metabolomic by-products was enabled through the collection of patient sera at the same time points as whole blood. Secondary analysis of protein expression by immunoassay in serial serum samples will enable identification of biomarker signatures that do not rely on RT-qPCR | — |
Countries
England, Germany, United Kingdom