NCT04292561

Intraoperative EEG Monitoring and Postoperative Delirium in Elderly Patients With Sevoflurane Anesthesia

Effects of Different Sevoflurane Concentrations on Intraoperative EEG and Postoperative Delirium in Elderly Patients

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 460 (actual)
• Sponsor: The First Affiliated Hospital of Anhui Medical University · Academic / Other
• Sex: All
• Age: 60 Years – 90 Years
• Healthy volunteers: Not accepted

Summary

Delirium is an acute onset of attentional and cognitive impairment. BIS guided anesthesia can reduce the incidence of postoperative delirium. Long term electroencephalogram (EEG) suppression during operation is related to postoperative delirium. The latest research shows that the anesthesia depth guided by EEG does not reduce the incidence of postoperative delirium. The purpose of this study was to explore the relationship between anesthesia exposure with different minimum alveolar concentration(MAC) and postoperative delirium(POD), and to observe the characteristics of EEG.

Detailed description

More and more studies have focused on the relationship between EEG inhibition and postoperative delirium in general anesthesia. At present, there are two kinds of commonly processed quantitative EEG monitoring to evaluate the depth of anesthesia, one is bispectral index (BIS) and the other is patient state index (PSI). The relationship between intraoperative anesthetic exposure and postoperative delirium is unclear, or whether potential patient characteristics increase the risk of EEG suppression and postoperative delirium. Gastrointestinal surgery can lead to long-term changes in colonic flora, which can remotely regulate brain function through the gut brain axis. We speculated that the abnormal composition of intestinal flora before abdominal operation might be the influencing factor of POD.

Conditions

• Postoperative Delirium
• Sevoflurane
• Electroencephalogram

Interventions

Type	Name	Description
DRUG	Low MAC	To maintain a target of sevoflurane inhalation concentration 0.8 MAC.
DRUG	High MAC	To maintain a target of sevoflurane inhalation concentration 1.0 MAC.

Timeline

• Start date: 2020-03-01
• Primary completion: 2023-01-30
• Completion: 2023-02-10
• First posted: 2020-03-03
• Last updated: 2023-02-24

Locations

1 site across 1 country: China