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Frontal EEG Dynamics During Anesthesia in Patients With Obesity and Normal Weight

Recruitingn/aAges 18 Years - anyAllDuzce University
NCT07877090 on ClinicalTrials.gov ↗
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In plain words

What the trial is, and whether it could suit you

This prospective observational study aims to compare frontal electroencephalographic (EEG) spectral dynamics between patients with obesity and normal weight undergoing general anesthesia. The primary objective is to evaluate whether changes in frontal alpha power around propofol-induced loss of consciousness differ between the two BMI groups. Secondary objectives include comparing changes in delta power, the alpha/delta power ratio, and frontal alpha asymmetry around loss of consciousness, as well as evaluating EEG spectral dynamics throughout the intraoperative period. Anesthetic management will be determined by the attending anesthesiologist according to routine clinical practice, without intervention by the study investigators.

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📋 Eligibility rules (as published)
Inclusion Criteria: * Adults aged 18-65 years * Scheduled for elective surgery under general anesthesia * American Society of Anesthesiologists (ASA) physical status I-III * General anesthesia induction performed with propofol * Availability of continuous frontal EEG monitoring (SedLine) during anesthesia * BMI 18.5-24.9 kg/m² for the normal-weight group or BMI ≥30 kg/m² for the obesity group * Ability to provide written informed consent Exclusion Criteria: * \- BMI 25.0-29.9 kg/m² * History of epilepsy or seizure disorder * Known major neurological disease that may affect EEG activity * Altered level of consciousness before anesthesia * Regular use of antiepileptic medications or other drugs known to substantially affect EEG activity * Emergency surgery * Pregnancy * Skin lesions, infection, or other conditions of the forehead preventing appropriate placement of the EEG sensor * Inability to obtain an adequate-quality EEG recording because of technical failure or excessive artifacts * Requirement for substantial deviation from the planned routine anesthetic management that prevents standardized EEG assessment * Refusal to participate or inability to provide written informed consent
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What it tests

  • Frontal Electroencephalography Monitoring
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Where

1 site
Düzce University Research and Application Hospital
Düzce, Turkey (Türkiye)
🤝 Taking part is your choice, and you can leave at any time. Only the trial team can confirm you are eligible — always decide together with your own doctor.
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