- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04358796
Measuring Cognitive Enhancement During Hyperbaric Oxygen Treatments
The aim of the current study was to examine the effect of short-term HBOT (hyperbaric oxygen treatments) on a range of cognitive abilities. The current study examined whether there is a HBOT-related short-term cognitive improvement and, if so, what specific cognitive abilities are improved by the intervention.
Participants were randomized to perform cognitive tasks in one of two chambers with two different clinical environments: (a) HBOT condition: (2 ATA (atmosphere absolute) 100% oxygen for 90 minutes). (b) Control condition: in which the chamber was not pressurized (Normobaric condition- 1 ATA for 90 minutes).
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The aim of the current study was to examine the effect of short-term HBOT on a range of cognitive abilities. The current study examined whether there is a HBOT-related short-term cognitive improvement and, if so, what specific cognitive abilities are improved by the intervention.
Participants were recruited through ads on the internet and on student social groups. All participants underwent a comprehensive physical and neurological examination, and general medical conditions were ruled out. Participants were excluded if reported changes in their cognitive or behavioral functions during one month prior to the beginning of the study. Smokers (people who smoke more than seven cigarettes a week) were required to take a lung x-ray confirming there isn't a pulmonary pathology, such as pneumothorax, pulmonary bullae, emphysema, or other lung pathologies preventing them from staying in a high ATA environment. Participants with an abnormal x-ray were excluded from the study. Participants who regularly use Methylphenidate (i.e. Ritalin) or other stimulants for attention disorders (i.e. ADHD) were instructed not to take it at the day of the experiment.
Following consent, all the participants were exposed to the testing battery in a group setting. One of the experimenters went through each of the sub-tests instructions in a detailed manner prior to a practice phase in which participants trained on the tasks. Afterwards, participants were randomized to perform the tasks in one of two chambers with two different clinical environments: (a) HBOT condition: (2 ATA 100% oxygen for 90 minutes). The atmospheric pressure in this condition was set to 2 ATA. This ATA level is known to have a clinical effect, whereas higher-pressure levels may result in inhibitory brain effects or even lead to focal toxicity (Efrati and Ben-Jacob, 2014). (b) Control condition: in which the chamber was not pressurized (Normobaric condition- 1 ATA for 90 minutes) and participants breathed air (21% oxygen). In this condition, ATA was elevated for a few minutes to 1.2 ATA in order to mimic the feeling of pressure building up in the ears. The pressure was decreased soon after to 1 ATA.
The assessment began 30 min after participants wore the oxygen masks within the chamber, in order to enable appropriate brain oxygenation in the HBOT condition (Vadas et al., 2017). The battery was composed of cognitive tests adapted for high functioning subjects and adjusted to an in-chamber group administration setting.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
-
Zerifin, Israel
- Assaf Harofeh Medical Center
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Age 20-40
- intact sight / corrected sight
- Hebrew as mother tongue
- Intact comprehension
Exclusion Criteria:
- Active neurologic or psychiatric diagnosis.
- If Had been treated with HBOT for any other reason prior to their inclusion;
- Chest pathology ;
- Inner ear disease;
- Claustrophobia;
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: HBOT environment
Cognitive testing in 2ATA, 100% oxygen in breathing-masks
|
Subjects will enter the oxygen chamber.
ATA will be elevated to 2 ATA.
They will breath 100% oxygen while solving cognitive tests designed to assess their cognitive capacities
|
Sham Comparator: Control environment
Cognitive testing in 1ATA, air in breathing-masks
|
Subjects will enter the oxygen chamber.
ATA will be elevated to 1.2 ATA for a short while and the decreased back to 1 ATA.
They will breath air while solving cognitive tests designed to assess their cognitive capacities
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
memory
Time Frame: after 20 minutes of intervention
|
Number of words retrieved from a list
|
after 20 minutes of intervention
|
Working memory
Time Frame: after 20 minutes of intervention
|
accuracy rates on a working memory paradigm (n-back)
|
after 20 minutes of intervention
|
Divided attention
Time Frame: after 20 minutes of intervention
|
accuracy rates on a divided attention task (identifying visual and auditory targets)
|
after 20 minutes of intervention
|
Information processing speed
Time Frame: after 20 minutes of intervention
|
Accuracy rates on an information processing speed task (Symbol tracing task)
|
after 20 minutes of intervention
|
Response inhibition
Time Frame: after 20 minutes of intervention
|
Accuracy rates on a response inhibition task (stroop)
|
after 20 minutes of intervention
|
Problem solving
Time Frame: after 20 minutes of intervention
|
accuracy rates on a problem solving task (solving arithmetic series)
|
after 20 minutes of intervention
|
Collaborators and Investigators
Sponsor
Investigators
- Study Director: Shay Efrati, Assaf-Harofeh Medical Center
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
Additional Relevant MeSH Terms
Other Study ID Numbers
- 0031-17-ASF
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.
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