NCT07073274

EEG During Gastroscopy and/or Colonoscopy

EEG Analysis During Anesthesia for Day Case Gastroscopy and/or Colonoscopy

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 149 (actual)
• Sponsor: Erasme University Hospital · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

During anesthesia, EEG shows specific and significant changes according to the depth of anesthesia and the drugs used. Endoscopic procedures like gastroscopies or colonoscopies are usually done on an outpatient basis using essentially propofol for sedation or anesthesia. Preliminary reports have shown that the depth of anesthesia during these procedures may be very deep resulting even in a burst suppression pattern on the EEG. In this study, frontal EEG will be recorded continuously using a Root - Sedline device (Masimo, US). Anesthesiologists will be free to use the medications and dosage they judge appropriate. The attending anesthesiologist will be blinded to the EEG. Medications and dosages will be recorded, as well as processed EEG data from the Sedline and the raw EEG. Primary outcome is the % of time spend in specific range of patient state index (PSI 0-10; 10-20; 20-30; 30-40; 40-50; 5-60; 60-70; 70-80; 80-90; 90-100) as well as the % of time spent in burst suppression.

Conditions

• Endoscopy of Stomach (Procedure)
• Colonoscopy (Procedure)
• Continuous Processed Electroencephalogram (Procedure)

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	EEG analysis	All patients will have a continous recording of their EEG during anesthesia

Timeline

• Start date: 2025-07-25
• Primary completion: 2026-02-15
• Completion: 2026-02-28
• First posted: 2025-07-18
• Last updated: 2026-03-18

Locations

1 site across 1 country: Belgium