Key result
Parenclitic pH-bicarbonate axis deviations linked to ~108% higher 30-day mortality in sepsis.
Why the study?
Mapping individual functional organ connectivity in sepsis has been challenging due to a lack of analytical methods to evaluate physiological networks using routine clinical and laboratory data.
Does parenclitic network mapping of routine laboratory data predict 30-day mortality and 48-hour deterioration in critically ill patients with sepsis?
Cohort (n=162)
No
Does parenclitic network mapping of routine laboratory data predict 30-day mortality and 48-hour deterioration in critically ill patients with sepsis?
Parenclitic network mapping of routine laboratory data, specifically deviations in pH-bicarbonate and pH-lactate axes, can independently predict 30-day mortality in sepsis patients, offering a novel prognostic tool beyond traditional linear scoring systems like SOFA.
Answers are grounded in this paper and cite their sources.
May support network-based sepsis prognostication beyond SOFA; hypothesis-generating and requires prospective validation before practice change.
Sepsis is a complex disease involving multiple organ systems. A network physiology approach to sepsis may reveal collective system behaviors and intrinsic organ interactions. However, mapping functional connectivity for individual patients has been challenging due to the lack of analytical methods for evaluating physiological networks using routine clinical and laboratory data. This study explored the use of parenclitic network mapping to assess organ connectivity and predict sepsis outcomes based on routine laboratory data. Data from 162 sepsis patients meeting Sepsis-3 criteria were retrospectively analyzed from the MIMIC-III database. Fifteen physiological variables representing organ systems were used to construct organ network connectivity through correlation analysis. Correlation analysis identified 7 interactions linked to 30-day survival. Parenclitic network analysis was used to measure deviations in individual patients' correlations between organ systems from the reference physiological interactions observed in survivors. Parenclitic deviations in the pH-bicarbonate axis (hazard ratio = 2.081, p < 0.001) and pH-lactate axis (hazard ratio = 2.773, p = 0.024) significantly predicted 30-day mortality, independent of the Sequential Organ Failure Assessment (SOFA) score and ventilation status. This study highlights the potential of parenclitic network mapping to provide insights into sepsis pathophysiology and differences in organ system connectivity between survivors and non-survivors independent of sepsis severity and mechanical ventilation status.
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Ito et al. (2025) conducted a cohort in Sepsis (n=162). Parenclitic deviation in the pH-bicarbonate axis vs. Lower parenclitic deviation (reference population trend) was evaluated on 30-day mortality (HR 2.081, 95% CI 1.361-3.184, p=<0.001). Parenclitic deviations in the pH-bicarbonate axis (HR 2.081) and pH-lactate axis (HR 2.773) significantly predicted 30-day mortality in critically ill sepsis patients, independent of SOFA score.
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