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Combined Electroencephalogram, Magnetic Resonance Imaging-Positron Emission Tomography of Dexmedetomidine Induced Sleep

This study has been completed.
Information provided by (Responsible Party):
Oluwaseun Johnson-Akeju, Massachusetts General Hospital Identifier:
First received: November 30, 2011
Last updated: June 20, 2016
Last verified: June 2016
The investigators are doing this research study to find out how and where dexmedetomidine, a sedative anesthetic, acts in the brain. The investigators will do this by using a machine that records the brains electrical activity, called an electroencephalogram (EEG), and brain imaging scans to look at the brain.

Condition Intervention
Dexmedetomidine Induced Sedation Drug: dexmedetomidine

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Official Title: Combined Electroencephalogram, Magnetic Resonance Imaging-Positron Emission Tomography of Dexmedetomidine Induced Sleep

Resource links provided by NLM:

Further study details as provided by Oluwaseun Johnson-Akeju, Massachusetts General Hospital:

Primary Outcome Measures:
  • Number of Participants With Changes in the Brains Default Mode Network. [ Time Frame: 1.5hrs ]
    Number of participants with changes in the Default Mode network during loss and recovery of consciousness under dexmedetomidine induced sedation versus baseline as assessed by changes in blood oxygen level depended (BOLD) signals during the awake, unconscious, and recovery states.

Enrollment: 20
Study Start Date: September 2012
Study Completion Date: July 2013
Primary Completion Date: July 2013 (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 two magnetic resonance imaging- positron emission tomography (MRI-PET) scans of the brain in addition to high density electroencephalogram (EEG) acquisition. The first scan will be a baseline scan while the second scan will be performed while dexmedetomidine is being infused.
Drug: dexmedetomidine
The dexmedetomidine infusion will be individualized to each study participant by a target plasma concentration where loss of consciousness is initially observed. Loss of consciousness will be assayed by specific auditory and verbal stimuli.
Other Name: precedex


Ages Eligible for Study:   18 Years to 35 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • American Society of Anesthesiologists (ASA) physical status I
  • 18 to 35 years of age

Exclusion Criteria:

  • MRI and/or PET screening criteria not met
  • Abnormal sleep habits/known or suspected sleep disorder(s)
  • Taking medication that alters sleep, cognitive function, or both -History of a known neurological or psychiatric problem -Younger than 18 or older than 35 years of age
  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: NCT01485380

United States, Massachusetts
Massachusetts General Hospital
Boston, Massachusetts, United States, 02114
Sponsors and Collaborators
Massachusetts General Hospital
Principal Investigator: Oluwaseun Johson-Akeju, M.D Massachusetts General Hospital
  More Information

Responsible Party: Oluwaseun Johnson-Akeju, Assistant in Anesthaesia, Massachusetts General Hospital Identifier: NCT01485380     History of Changes
Other Study ID Numbers: 2011-P-002333
Study First Received: November 30, 2011
Results First Received: September 24, 2014
Last Updated: June 20, 2016

Keywords provided by Oluwaseun Johnson-Akeju, Massachusetts General Hospital:

Additional relevant MeSH terms:
Hypnotics and Sedatives
Central Nervous System Depressants
Physiological Effects of Drugs
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Adrenergic alpha-2 Receptor Agonists
Adrenergic alpha-Agonists
Adrenergic Agonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action processed this record on August 17, 2017