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.
Who can participate
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Age 18 years or older
* Scheduled for elective non-cardiac surgery under general anesthesia
* Clinical Frailty Scale (CFS) score of 4 or above
* Available routine preoperative laboratory values (LDH, creatinine, platelet count) within 24 hours before surgery
Exclusion Criteria:
* Cardiac surgery
* Emergency surgery
* Preoperative vasopressor infusion
* Severe hematological disease
* Missing laboratory data required for EASIX calculation
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Incidence of Post-Induction Hypotension
Timeframe: Within the first 15 minutes after anesthesia induction