Electroencephalogram Studies of Induction and Recovery From Sevoflurane-Induced General Anesthesia
Overview
- Phase
- Phase 2
- Intervention
- Ketamine
- Conditions
- Anesthesia
- Sponsor
- Massachusetts General Hospital
- Enrollment
- 12
- Locations
- 1
- Primary Endpoint
- Frequencies At Which Changes in Alpha, Theta, and Slow-Delta Wave Power Were Observed From Baseline During Sevoflurane-induced General Anesthesia
- Status
- Completed
- Last Updated
- 6 years ago
Overview
Brief Summary
The investigators are performing this research study to find out how and where the anesthetic drugs sevoflurane and ketamine act in the brain. Sevoflurane and ketamine are anesthetics (a drug or agent used to decrease or eliminate the feeling of pain by causing unconsciousness). The investigators will study the brain using a machine that records the brain's electrical activity, called an electroencephalogram (EEG).
Detailed Description
During this research study, participants will receive sevoflurane, and sevoflurane and ketamine together, at a high enough dose to induce general anesthesia (make study participants "fall asleep"). During one visit participants will receive only sevoflurane; during another visit participants will be given both sevoflurane and ketamine together. The investigators will record EEG the entire time. The investigators will also ask some questions related to pain and cognitive function.
Investigators
Oluwaseun Johnson-Akeju, MD, MMSc
Associate Professor of Anaesthesia
Massachusetts General Hospital
Eligibility Criteria
Inclusion Criteria
- •Between the ages of 18 and 50
- •Normal body weight and habitus, BMI ≤ 30
- •Non-smoker
- •American Society of Anesthesiologists (ASA) physical status classification P1
Exclusion Criteria
- •Chronic health conditions
Arms & Interventions
EEG Dynamics
EEG data will be collected on patients receiving sevoflurane, and sevoflurane and ketamine together.
Intervention: Ketamine
EEG Dynamics
EEG data will be collected on patients receiving sevoflurane, and sevoflurane and ketamine together.
Intervention: Sevoflurane
Outcomes
Primary Outcomes
Frequencies At Which Changes in Alpha, Theta, and Slow-Delta Wave Power Were Observed From Baseline During Sevoflurane-induced General Anesthesia
Time Frame: Approximately 60 minutes
Changes in power from baseline at various EEG spectral frequencies were assessed at sevoflurane-induced loss of responsiveness. EEGs of 12 patients were analyzed to determine changes in various EEG spectral frequencies (alpha, theta, delta, etc.) from baseline. The outcome measure reflects the associated frequency (Hz) at which changes were found under sevoflurane-induced general anesthesia. These frequency values are a representation of the findings for all 12 participants.