Study of Carotid Artery Flow Time and IVC Collapsibility to Predict Low Blood Pressure After General Anesthesia in Older Adults Undergoing Planned Surgery

What this Trial Is About

This research aims to evaluate the ability of carotid artery corrected flow time cFT measured by carotid ultrasound and the inferior vena cava IVC collapsibility index to predict hypotension after induction of general anesthesia in elderly patients undergoing elective surgery. Hypotension after anesthesia induction is common and can lead to serious organ damage, especially in older adults who are more sensitive to blood pressure changes due to heart and vascular conditions. The study involves non-invasive ultrasound measurements taken shortly before anesthesia induction. The cFT is measured on the right common carotid artery using a linear probe, while the IVC collapsibility index is assessed using a subcostal ultrasound approach during spontaneous breathing. Blood pressure and heart function will be closely monitored after anesthesia induction. If hypotension occurs, defined by specific blood pressure drops, fluid boluses and medication may be given as needed. Participants will undergo ultrasound imaging before surgery and have their blood pressure monitored closely for 15 minutes after intubation. Researchers will assess how well these ultrasound measurements predict hypotension during this period. The main outcome is the diagnostic accuracy of cFT and IVC collapsibility in predicting low blood pressure immediately before anesthesia induction. Safety and response to treatment will also be recorded until surgery ends. Total participation lasts from preoperative assessment through anesthesia and surgery.

Carotid Artery Corrected Flow Time and Inferior Vena Cava Collapsibility Index for Prediction of Hypotension After Induction of General Anesthesia in Geriatric Patients Undergoing Elective Surgery