- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03757897
The Influence of Dexmedetomidine Hypnosis on Cerebrospinal Fluid (CSF) Volume, Brain Diffusion and 'Stiffness' Characteristics.
May 24, 2022 updated by: Yale University
The Influence of Dexmedetomidine Hypnosis on Cerebrospinal Fluid (CSF) Volume, Brain Diffusion and 'Stiffness' Characteristics
The primary goal is to quantify cerebrospinal fluid (CSF) volume, diffusion characteristics and mechanical properties of brain tissue at two states of arousal.
Study Overview
Status
Withdrawn
Conditions
Intervention / Treatment
Detailed Description
The primary goal is to quantify cerebrospinal fluid (CSF) volume, diffusion characteristics and mechanical properties of brain tissue at two states of arousal:
- Resting, awake state
- During sleep with low-dose intravenous infusion of dexmedetomidine (titrated to a Bispectral index (BIS) of 60-70)
Study Type
Interventional
Phase
- Early Phase 1
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 40 years (Adult)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Healthy Males or females between 18 and 40 years of age. Determined to be American Society of Anesthesiologist (ASA) 1 subjects.
- Ability to provide written informed consent.
Exclusion Criteria:
- Subjects with potential difficult airway as determined by the anesthesiologist
- History of or family history of difficulty with anesthesia or sedation procedures
- Known intolerance to dexmedetomidine
- Body mass index >30
- Subjects with any of the following: narcolepsy, obstructive sleep apnea (OSA) and/or abnormal sleeping patterns (including but not limited to those who use a Continuous positive Airway Pressure (C-PAP) machine, sleeping during the day, using medication to fall asleep, subjects reporting snoring as determined by self- report using Snoring, Tiredness, Observed apnea, Blood pressure, Body mass index, Age, Neck circumference and Gender (STOP-BANG) questionnaire (i) for undiagnosed OSA (3 or more 'yes' answers will exclude) and/or medical history;
- Subjects with a history of restless leg syndrome as determined by self-report and/or medical history;
- Use, in the past two weeks, of psychoactive medications (four weeks for fluoxetine) or medications that may affect brain function (including but not limited to opioid analgesics, antidepressants, antipsychotics, benzodiazepines and barbiturates) as determined by self-report and/or medical history;
- Current or past Diagnostic and Statistical Manual of Mental Disorders (DSM-V) diagnosis of a psychiatric disorder if it was severe enough to require the use of medications and or hospitalization to treat the condition.
- Major medical problems that can impact brain function (e.g., problems of the Central Nervous System including seizures and psychosis; cardiovascular disease including hypertension and arrhythmias; metabolic, autoimmune, endocrine disorders) as determined by self-report, medical history and/or clinical exam;
- Hepatic dysfunction or impairment as determined by subjects' self-reported history
- Head trauma with loss of consciousness for more than 60 minutes as determined by self-report and/or medical history;
- Positive urine test for controlled substances (cocaine, methamphetamine, amphetamines, opioids, cannabinoids, benzodiazepines and barbiturates) at the screening visit and at each visit of imaging study and neuropsychological assessment;
- Positive urine pregnancy test;
- Nursing mothers will be excluded
- Presence of ferromagnetic objects in the body that are contraindicated for MRI of the head (including but not limited to pacemakers or other implanted electrical devices, brain stimulators, some types of dental implants, aneurysm clips, metallic prostheses, permanent eyeliner, large tattoos, implanted delivery pump, or shrapnel fragments) or fear of enclosed spaces as determined by the self-report checklist.
- Fear of enclosed spaces (claustrophobia) as determined by self-report and medical history.
- Cannot lie comfortably flat on the back for up to 3 hours in the MRI scanner as determined by self- report.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Dexmedetomidine induced sleep patients
All subjects will be measured for CSF volume, diffusion parameters and mechanical 'stiffness' of the brain during wakefulness and during sleep-induced with dexmedetomidine (DEXM).
|
The standard dosing of 1mcg/kg will be implemented over 10 minutes followed by a maintenance infusion of 0.2-1.0
titrated to a the target BIS (60-70) during the 20 minutes prior to MRI.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
CSF volume increase by 10%
Time Frame: 2 hours 30 minutes
|
We hypothesize that CSF volume (as measured by T1 relaxation) will expand by 10% with DEXM- induced sleep compared to wakefulness.
The increase in CSF volume during DEXM-induced sleep occurs because DEXM lowers central norepinephrine tone and sleep causes an increase in the interstitial fluid (ISF) volume (cell volume shrinks).
MRI will take place 30 minutes after dexmedetomidine infusion.
|
2 hours 30 minutes
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Helene Benveniste, MD, PhD, Yale University
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Anticipated)
December 1, 2021
Primary Completion (Anticipated)
December 1, 2022
Study Completion (Anticipated)
December 1, 2022
Study Registration Dates
First Submitted
November 27, 2018
First Submitted That Met QC Criteria
November 27, 2018
First Posted (Actual)
November 29, 2018
Study Record Updates
Last Update Posted (Actual)
May 31, 2022
Last Update Submitted That Met QC Criteria
May 24, 2022
Last Verified
May 1, 2022
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Brain Diseases
- Central Nervous System Diseases
- Nervous System Diseases
- Intracranial Hypertension
- Physiological Effects of Drugs
- Adrenergic Agents
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Central Nervous System Depressants
- Peripheral Nervous System Agents
- Analgesics
- Sensory System Agents
- Analgesics, Non-Narcotic
- Adrenergic alpha-2 Receptor Agonists
- Adrenergic alpha-Agonists
- Adrenergic Agonists
- Hypnotics and Sedatives
- Dexmedetomidine
Other Study ID Numbers
- 2000024166
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Yes
Studies a U.S. FDA-regulated device product
No
product manufactured in and exported from the U.S.
Yes
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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