This study aims to explore the frequent occurrence of hypotension during anesthesia induction due to anesthetic drugs or fasting. Predicting this condition is important for patient safety and anesthesia management. The study examines two indices: the Pleth Variability Index (PVI), derived from pulse oximeter readings, and the Diastolic Shock Index (DSI), calculated using heart rate and diastolic blood pressure. While PVI is a well-known method, DSI has been less explored in predicting anesthesia-related hypotension. The study aims to compare the effectiveness of these two indices in forecasting hypotension during anesthesia induction.
Who can participate
Age range
18 Years – 65 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
. Patients with a preoperative fasting period of at least 6 hours
. Patients scheduled for elective surgery under general anesthesia
. Patients aged 18-65 with ASA classification I-III
. Patients undergoing lumbar spinal surgery
Exclusion criteria
. Patients who do not agree to participate in the study
. Emergency surgeries
. Patients who will undergo surgery under spinal anesthesia
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
Prediction of anesthesia-induced hypotension
Timeframe: First 20 minutes after induction of anesthesia