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EEG-fMRI Experiments During Anesthesia Induction With Propofol

NCT06179719 · Status: RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 35

Last updated 2023-12-22

No results posted yet for this study

Summary

This observational study aims to investigate healthy cortical and subcortical neural processes involved in generating intrinsic alpha oscillations during induction of general anesthesia with propofol. To do this, the investigators have designed a simultaneous electroencephalogram (EEG)- MRI (functional MRI and Spectroscopy) experiment with a visual stimulation paradigm that addresses the subject's specific intrinsic alpha rhythm during anesthesia and wakefulness. The main question it aims to answer is: could the investigators address the alpha oscillation system of the healthy brain with external stimulation during anesthesia? This experiment could lead to a better understanding of the mechanisms underlying the generation of alpha oscillations. It could open new doors to diagnostic and treatment options for diseases where alpha oscillations, such as post-operative delirium, seem to be affected.

Conditions

  • Anesthesia

Interventions

DRUG

Propofol

Anesthesia will be induced intravenously using the hypnotic drug propofol. The drug is used regularly in everyday clinical practice to carry out general anesthesia, and the intended concentrations are within the usual clinical dosage range. Propofol will be applied via target-controlled infusion (TCI) with a perfusor using TCI set to effect mode as described by Schnider (Schnider et al., 2016). Starting at low concentrations, the effect site concentration will be increased stepwise to achieve the target level of sedation as measured by the Modified Observer's Assessment of Alertness and Sedation (MOAA/S) scale. We aim for three different levels of sedation: low (MOAA/S=5-4), mid (MOAA/S=3-2) and high (MOAA/S=1).

BEHAVIORAL

visual flickering stimulation at the alpha frequency

Participants will receive visual stimulation as a flickering light during the different sedation levels, including wakefulness pre- and post-anesthesia. Stimulation will be done with eyes closed in all conditions.

Sponsors & Collaborators

  • Technical University of Munich

    lead OTHER

Study Design

Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
35 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2023-09-10
Primary Completion
2024-09-10
Completion
2026-09-10

Countries

  • Germany

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06179719 on ClinicalTrials.gov