Study of Four Anesthesia Methods During Functional Endoscopic Sinus Surgery Comparing Effects on Brain Protection, Surgical Field, and Blood Loss

What this Trial Is About

Researchers are evaluating the effects of four different anesthetic maintenance methods on surgical conditions, blood pressure stability, and brain protection during functional endoscopic sinus surgery FESS performed with controlled low blood pressure. The study compares propofol-remifentanil alone, propofol-remifentanil with added ketamine and magnesium, sevoflurane-remifentanil alone, and sevoflurane-remifentanil with added ketamine and magnesium. The main focus is on measuring blood markers of brain injury and assessing the quality of the surgical field and bleeding during surgery. Participants are randomly assigned to one of the four groups receiving general anesthesia with either propofol-remifentanil or sevoflurane-remifentanil, with or without continuous infusions of ketamine and magnesium. The infusions are administered continuously during surgery according to the assigned group. This trial is conducted at a single center and includes a triple-blind design to reduce bias. During the study, participants will have blood samples taken at three key times before surgery starts, 20 minutes after controlled low blood pressure begins, and at surgery end to measure brain injury markers. Surgeons will rate surgical field visibility and bleeding at the end of surgery. Recovery will be assessed immediately after extubation using standard scores, and postoperative pain will be measured within 24 hours. The total participation involves the surgery and immediate postoperative period, with ongoing monitoring of outcomes related to anesthesia methods and brain protection.

Anesthesia Techniques, Neuroprotection and Surgical Field in FESS Under Controlled Hypotension