EASIX Score and Post-Induction Hypotension in Frail Patients Undergoing Non-Cardiac Surgery

Condition(s) studied

Investigational drug(s) / intervention(s)

EASIX Score Assessment: Preoperative Endothelial Activation and Stress Index (EASIX) score calculated from routine laboratory parameters obtained within 24 hours before surgery. Formula: LDH (U/L) × Creatinine (mg/dL) / Platelet count (10⁹/L). No additional blood sampling is performed; only existing routine preoperative laboratory values are used.

Study summary

Post-induction hypotension (PIH) is a common and clinically significant hemodynamic complication following general anesthesia induction. Frail patients are particularly vulnerable due to impaired vascular reactivity and endothelial dysfunction. The Endothelial Activation and Stress Index (EASIX), calculated from routine laboratory parameters (LDH, creatinine, and platelet count), may serve as a preoperative biomarker to identify patients at risk for PIH.

This prospective observational cohort study aims to evaluate the association between preoperative EASIX score and the occurrence of post-induction hypotension in frail patients undergoing elective non-cardiac surgery under general anesthesia. A total of 160 patients with a Clinical Frailty Scale (CFS) score of 4 or above will be enrolled. Mean arterial pressure will be measured every 2 minutes for the first 15 minutes after induction. PIH is defined as MAP below 65 mmHg and/or a decrease of 20% or more from baseline.

Eligibility

Primary outcome measure(s)

• Incidence of Post-Induction Hypotension — Within the first 15 minutes after anesthesia induction
  Occurrence of MAP below 65 mmHg and/or a decrease of 20% or more from baseline mean arterial pressure, measured every 2 minutes for the first 15 minutes after anesthesia induction, before surgical incision.

Trial sites (1)

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