This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

EEG Studies of Induction and Recovery From Propofol Induced General Anesthesia

This study is ongoing, but not recruiting participants.
National Institutes of Health (NIH)
Information provided by (Responsible Party):
Emery Brown, Massachusetts General Hospital Identifier:
First received: February 16, 2012
Last updated: December 1, 2016
Last verified: December 2016
The purpose of this study is to investigate how the commonly used anesthetic drug propofol works in the brain to produce loss of consciousness. While under general anesthesia your brain waves will be measured using electroencephalogram (EEG). On a separate day, the patient's brain will be imaged using magnetic resonance imaging (MRI).

Condition Intervention
Brain Activity Under Sedation Drug: Propofol

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Electroencephalogram Studies of Induction and Recovery From Propofol Induced General Anesthesia

Resource links provided by NLM:

Further study details as provided by Emery Brown, Massachusetts General Hospital:

Primary Outcome Measures:
  • Localize and track brain activity under propofol sedation. [ Time Frame: 11 hours ]
    The primary goal of this trial is to localize and track changes in brain activity during loss and recovery of consciousness induced by propofol using source localization from EEG recordings analyzed with spectral methods, source localizations techniques and event-related potentials.

Enrollment: 20
Study Start Date: August 2005
Estimated Study Completion Date: July 2017
Estimated Primary Completion Date: July 2017 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Active Study Arm
Subjects recruited into this study will be required to undergo a base MRI scan of the brain. On a separate day propofol will be administered with concurrent EEG while subjects respond to stimuli.
Drug: Propofol
Propofol will be infused using a computer controlled delivery system running the program STANPUMP. Loss of consciousness will be defined as loss of response to auditory stimulus (button press).


Ages Eligible for Study:   18 Years to 36 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy, non-smoking male and female volunteers, ages 18-36 with normal body weight.
  • American Society of Anesthesiologists (ASA) physical status I

Exclusion Criteria:

  • History of head trauma
  • Surgical aneurysm clips
  • Cardiac pacemaker
  • Prosthetic heart valve
  • Neurostimulator
  • Implanted pumps
  • Cochlear implants
  • Metal rods, plates
  • Screws
  • Intrauterine device
  • Hearing aid
  • Dentures (which might create NMR artifacts)
  • Metal injury to eyes
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01543633

United States, Massachusetts
Massachusetts General Hospital
Boston, Massachusetts, United States, 02114
Sponsors and Collaborators
Massachusetts General Hospital
National Institutes of Health (NIH)
Principal Investigator: Emery N Brown, M.D., Ph.D. Massachusetts General Hospital
  More Information

Responsible Party: Emery Brown, Emery N. Brown, M.D., Ph.D., Massachusetts General Hospital Identifier: NCT01543633     History of Changes
Other Study ID Numbers: 2005P001549
5DP1OD003646 ( U.S. NIH Grant/Contract )
Study First Received: February 16, 2012
Last Updated: December 1, 2016

Additional relevant MeSH terms:
Hypnotics and Sedatives
Central Nervous System Depressants
Physiological Effects of Drugs
Anesthetics, Intravenous
Anesthetics, General
Anesthetics processed this record on September 19, 2017