- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03911154
Evaluation of SmartSleep Technology for Improving the Efficiency and Restorative Quality of Sleep in Healthy Adults
Evaluation of SmartSleep Technology for Improving the Efficiency and Restorative Quality of Sleep in Healthy Adults in Order to Mitigate Cognitive Performance Deficits Due to Sleep Restriction and Emergency Awakenings
Study Overview
Status
Conditions
Detailed Description
Adequate healthy sleep is essential in spaceflight to ensure that astronauts maintain a high level of cognitive performance capability and do so without undue stress. There is a need for a technology that can improve sleep quality in space and biologically maximize the performance benefits of limited sleep duration, without unduly affecting the ability of astronauts to awaken abruptly and respond to an in-flight emergency. Sleep slow waves support system and synaptic consolidation by promoting specific patterns of neuromodulatory and electric activities, and subjective sleep quality is related to the size and number of slow waves that occur nightly.
This study will use SmartSleep (Philips) technology to determine what effect the device has on daytime cognitive performance after emergent awakenings from sleep in a chronic sleep restriction paradigm. The SmartSleep technology uses two small sensors in the headband to continuously detect the brain's slow wave sleep (delta/theta frequency) in real time, and a closed-loop algorithm customizes the timing and volume of tones to optimize the sleep pattern. Thus, the device uses "quiet audio tones" (sub-awareness) to increase slow waves, which can enhance sleep quality/depth, thereby enhancing subsequent waking cognitive performance without the unwanted sedating effects of medications on cognitive functions during emergency awakenings.
Subjects will be in the laboratory for 7 days/6 nights. Night 1 will be an adaptation night with 8-hours time in bed. Nights 2-5 will consist of 5 hours time in bed, followed by night 6 of a recovery 10 hours time in bed. During nights 2-5, subjects will receive one of four stimulation modalities using the SmartSleep wearable device. Subjects will receive all four modalities in a randomized order:
- Continuous Fixed Interval
- Block
- In-Phase Adjustable
- Sham: No auditory stimulation while wearing the SmartSleep headband
Cognitive performance testing and self-report surveys will be completed on a daily basis. A total of 12 healthy astronaut-like adults will be studied. Subjects will complete the 7-day study in groups of 4.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Pennsylvania
-
Philadelphia, Pennsylvania, United States, 19104
- University of Pennsylvania
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Bachelor's degree or Master's degree (or the equivalent in work experience) in a relevant field, and/or military service.
- Free of psychological/psychiatric conditions that preclude participation.
- BMI < 35.
- Self-reported regular sleep schedule; able to maintain their sleep schedule during the course of the study.
- Self-reported sleep duration of 6-8.5 hrs per night (verified by 6 work days of ambulatory sleep monitoring with wrist actigraphy and daily logs).
- Ability to read/write English.
Exclusion Criteria:
- History of neurological, psychiatric, or other medical condition that excludes participation.
- Current mania or psychosis.
- Current depression as determined by the Beck Depression Inventory (Beck, 1996).
- Alcohol or drug abuse in the past year based upon history and urine toxicology screen.
- Excessive alcohol intake (≥ 21 drinks per week) or binge alcohol consumption (> 5 drinks per day).
- Excessive caffeine consumption (> 650mg/day combining all caffeinated drinks regularly absorbed during the day).
- Current smoker/tobacco user, or using nicotine replacement therapy. Those that have been nicotine-free for 30 days will be included.
- Acute, chronic, or debilitating medical conditions, major Axis I psychiatric illness based on history, physical exam, blood and urine chemistries, and CBC.
- Individuals who self-report a history of recurrent seizures or epilepsy or have a history of medical conditions that could increase the chance of seizures (e.g. stroke, aneurysm, brain surgery, structural brain lesion).
- Cardiovascular, neurological, gastrointestinal, or musculoskeletal problems that exclude participation.
- Major controlled or uncontrolled medical condition such as congestive heart failure, neuromuscular disease, renal failure, cancer, COPD, respiratory failure or insufficiency, or patients requiring oxygen therapy (as determined by self-report).
- Currently working night, swing, split or rotating shift.
- Current use or use of within the past month of a prescription or over-the-counter sleep medication or stimulant; use of psychoactive medication (based on self-report and review with a study clinician).
- Pregnant or currently breast feeding
- Prior history or diagnosis of any sleep disorder
- High Risk of OSA based on STOP-BANG Questionnaire ("yes" on at least 4 of 8 questions)
- High Risk of Restless Legs Syndrome (RLS) based on Cambridge-Hopkins Screening questionnaire
- High Risk of Insomnia based on Insomnia Severity Index (score of 22 or higher)
- Individuals who self-report severe contact dermatitis or allergy to silicone, nickel or silver.
- Individuals who self-report moderate hearing loss.
- Inability to achieve appropriate headband fit.
- Planned travel across more than one time zone one month prior to and/or during the anticipated period of the study with SmartSleeps device use.
- Intentional naps during the week.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Other
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: SmartSleep Continuous Fixed Interval modality
This study uses within subject comparison. For each subject, the order of 3 SmartSleep modalities for each of the 4 nights of sleep restriction will be randomized. All subjects will receive all 3 stimulation modalities and a SHAM condition. This study arm tests the SmartSleep Continuous Fixed Interval stimulation modality during sleep relative to the SHAM condition. The Continuous Fixed Interval is the delivery of auditory tones a 1 Hz inter-tone interval stimulation. |
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
|
Experimental: SmartSleep Block modality
This study uses within subject comparison. For each subject, the order of 3 SmartSleep modalities for each of the 4 nights of sleep restriction will be randomized. All subjects will receive all 3 stimulation modalities and a SHAM condition. This study arm tests the SmartSleep Block stimulation modality during sleep relative to the SHAM condition. The Block is the delivery of auditory tones for 5 seconds on versus 5 seconds off. |
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
|
Experimental: SmartSleep In-Phase Adjustable modality
This study uses within subject comparison. For each subject, the order of 3 SmartSleep modalities for each of the 4 nights of sleep restriction will be randomized. All subjects will receive all 3 stimulation modalities and a SHAM condition. This study arm tests the SmartSleep In-Phase Adjustable stimulation modality during sleep relative to the SHAM condition. The In-Phase Adjustable is the constant stimulation with auditory tones delivered during each upstate of the slow wave. |
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
|
Sham Comparator: SHAM condition
This study uses within subject comparison. For each subject, the order of 3 SmartSleep modalities for each of the 4 nights of sleep restriction will be randomized. All subjects will receive all 3 stimulation modalities and a SHAM condition. This study arm is the SHAM condition, during which participants wore the SmartSleep device, however no auditory tones were delivered. |
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
During the 4 nights of sleep restriction (5 hours time in bed), subjects will have one of the following SmartSleep stimulation modalities each night in a randomized order. All subjects will receive all 4 stimulation modalities:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Psychomotor Vigilance Test-Brief (PVT-B)
Time Frame: Days 3-6
|
The PVT is a simple reaction time test that requires participants to react, as quickly as possible, by pressing a response key as soon as a rolling number counter presented in a box in the center of the computer screen appears.
The PVT is a validated and widely-used measure of vigilant attention that is sensitive to the effects of sleep loss.
The primary outcome was the number of PVT lapses.
The minimum number of PVT lapses is "0" and there is no maximum number of lapses, which are defined as response times >355 ms.
More PVT lapses indicates worse performance.
|
Days 3-6
|
Slow-wave Activity
Time Frame: Days 3-6
|
Total delta power measured during sleep
|
Days 3-6
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Digit Symbol Substitution Test (DSST)
Time Frame: Days 3-6
|
The Digit Symbol Substitution Test (DSST) is a widely used measure of cognitive throughput and cognitive instability that is sensitive to the effects of sleep loss.
The DSST was adapted from the Wechsler Adult Intelligence Scale.
Participants are shown an array of symbols and with corresponding numbers on a keyboard.
They are then presented the symbols one at a time in random order and must respond with the correct corresponding number as quickly as possible.
The primary outcome was number correct and given the established practice effects on the DSST, this measure was corrected for practice effects.
The DSST has a minimum of "0" correct responses and does not have a maximum; a higher number on the DSST represents better performance.
|
Days 3-6
|
Descending Subtraction Task (DST)
Time Frame: Days 3-6
|
The Descending Subtraction Test (DST) is a measure of working memory that is sensitive to the effects of sleep loss.
The DST requires participants to mentally subtract numbers in a sequential fashion as quickly as possible.
For example, if the starting number is 987, the participant subtracts nine from 987, with the difference being 978, the participant then subtracts eight from 978, and so on subtracting by seven, six, five, four, three, two, and one, from each difference at which point, and the participant then recycles the subtraction sequence beginning at nine again.
The DST has a minimum of "0" correct responses and does not have a maximum; a higher number on the DST represents better performance.
The primary outcome on the DST was Number correct.
|
Days 3-6
|
Robotic On-Board Trainer (ROBoT) Task
Time Frame: Days 3-6
|
The Robotic On-Board Trainer (ROBoT) task is NASA's platform for training astronauts to perform docking and grappling maneuvers using the Canada Arm.
The system is based on highly realistic 3D simulations of the arm and associated physics.
The ROBoT system involves a left-hand translational controller (x/y/z directions) and a right-hand rotational controller (pitch/roll/yaw), plus two laptop computer screens.
Key performance metrics include: (i) docking position accuracy, (ii) docking orientation accuracy, (iii) total task time, and (iv) smoothness of approach trajectory, which are aggregated to generate the primary outcome, which is the mean weighted score .
The weighted score ranges from 0 to 10 and a lower score indicates better performance.
|
Days 3-6
|
Collaborators and Investigators
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- NNX16AO69A/T0408
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
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.
Clinical Trials on Sleep
-
University of Wisconsin, MadisonPhilips HealthcareCompletedSleep, Slow-wave Sleep, Sleep Enhancement, Sleep Optimization
-
Brain Electrophysiology Laboratory CompanyRecruiting
-
University GhentEuropean CommissionEnrolling by invitation
-
Northumbria UniversityCompletedSleep | Mood | Poor Quality Sleep | Good Sleep HabitUnited Kingdom
-
Baylor College of MedicineEunice Kennedy Shriver National Institute of Child Health and Human Development... and other collaboratorsRecruiting
-
Brain Electrophysiology Laboratory CompanyCompletedSleep | Sleep HygieneUnited States
-
Koko Home, Inc.Stanford UniversityRecruitingSleep Disorder | Insomnia | Sleep Initiation and Maintenance Disorders | Sleep | Sleep Disturbance | Sleep HygieneUnited States
-
Medical College of WisconsinChildren's Hospital and Health System Foundation, Wisconsin; Divine Savior...Active, not recruitingSleep | Sleep HygieneUnited States
-
Aretaieion University HospitalRecruitingSleep Disorder | Sleep Initiation and Maintenance Disorders | Sleep | Sleep Disturbance | Surgery | Anesthesia | Sleep Fragmentation | Sleep Disorders, Circadian RhythmGreece
-
Brigham and Women's HospitalCharite University, Berlin, Germany; Stanford UniversityRecruitingSleep Disorders, Intrinsic | Sleep Wake Disorders | Sleep Disorders, Circadian Rhythm | Advanced Sleep Phase Syndrome (ASPS) | Delayed Sleep Phase Syndrome | Shift-Work Sleep Disorder | Delayed Sleep Phase | Non-24 Hour Sleep-Wake Disorder | Advanced Sleep Phase Syndrome | Advanced Sleep Phase | Irregular... and other conditionsUnited States