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This prospective observational cohort study included all septic shock patients with two groups of ESS and anylised in 28-day outcome, clinical biochemical parameters and hemodynamic monitoring.
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This prospective observational cohort study was conducted between October 2022 and August 2023 after the institutional ethics committee's approval (N0 00-03-35-38-14/22) and patients' written consent, registered at ClinTrials.gov (NCT). Inclusion criteria were all septic shock patients with ESS with absence of previous pituitary and thyroid disease. Exclusion criteria were: age below 18, patients with previous thyroid disease or an enlarged thyroid gland, pregnant women and patients who refused to participate in the study.
Patients and study protocol Upon admission to the ICU, patients who met the criteria for septic shock according to Surviving Sepsis Campaign and the criteria for ESS were divided into two groups: group 1 - low T3 and group 2 - low T3T4.
Definitions Septic shock is defined as a consequence of sepsis, characterized by hypotension requiring the use of vasopressors to achieve mean arterial pressure (MAP) ≥65 mmHg after crystalloid resuscitation and lactate values >2 mmol/L [14].
ESS is an abnormal finding of thyroid hormones in the absence of a previous disorder of hypothalamic-pituitary and thyroid function. The most common changes are low T3, followed by low T3 and T4 with normal TSH [15]. All patients included in the study were treated according to the Sepsis Survival Campaign guidelines from 2016 [16].
Data collection Demographic data with mortality scores (APACHE II (Acute Physiology And Chronic Health Evaluation II), SAPS II (Simplified Acute Physiology Score II) and SOFA (Sequential Organ Failure Assessment) score were collected on the admission in the ICU.
Laboratory parameters were analysed on the day of admission (T0), on the first (T1) and third (T2) day of ICU stay, and included analysis of complete blood count, C-reactive protein (CRP), procalcitonin (PCT), differential blood count, acid-base status with lactates, albumins and thyroid hormones: TSH (thyroid-stimulating hormone), FT3 (free triiodothyronine), FT4 (free thyroxine). Hemodynamic monitoring included monitoring of arterial blood pressure (systolic pressure (SBP), mean pressure (MAP), diastolic pressure (DBP)) and heart rate every hour during the first 4 days. Vasoactive drug requirement were expressed through the vasoactive drug-dependent index (VDI) and the shock index (SI), and calculated as follows:
VDI: ((dobutamine dose × 1) + (norepinephrine dose × 100) + (vasopressin dose × 100) + (epinephrine dose × 100))/MAP SI: heart rate/systolic blood pressure Mechanical ventilation requirement is categorized as YES or NO, the length of ICU stay is expressed in days and 28-day survival and characterized as transfer or death.
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47 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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