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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT02009813
Registration number
NCT02009813
Ethics application status
Date submitted
9/12/2013
Date registered
12/12/2013
Date last updated
2/12/2015
Titles & IDs
Public title
Hyperbaric Oxygen Therapy and Insulin Resistance (HOTAIR2) - Effect of One HBO Session.
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Scientific title
Hyperbaric Oxygen Therapy and Insulin Resistance (HOTAIR2) - Effect of One HBO Session.
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Secondary ID [1]
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RAH121212a
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Universal Trial Number (UTN)
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Trial acronym
HOTAIR2
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Obesity
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Type 2 Diabetes
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Condition category
Condition code
Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Treatment: Surgery - Hyperbaric Oxygen Therapy
Treatment: Surgery: Hyperbaric Oxygen Therapy
Participants will undergo 2 treatments of hyperbaric oxygen. Each treatment consists of 90 minutes compression at 2 atmospheres of pressure, with 30 minutes decompression back to 1 atmosphere. During this time, patients will be treated with 100% oxygen delivered via a hood system.
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Intervention code [1]
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Treatment: Surgery
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Comparator / control treatment
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Control group
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Outcomes
Primary outcome [1]
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Insulin sensitivity
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Assessment method [1]
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Timepoint [1]
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2 hours
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Secondary outcome [1]
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Hypoxia and inflammatory markers
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Assessment method [1]
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Using immuno-histo chemistry (IHC), quantitative plymerase chain reaction (qPCR), Western blot
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Timepoint [1]
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2 hours
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Eligibility
Key inclusion criteria
* Overweight to obese (BMI 25-35 kg/m2)
* Age >18 years (no specific upper age limit)
* Fit to enter hyperbaric chamber as assessed by hyperbaric physician.
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Minimum age
18
Years
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Maximum age
No limit
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
* Personal history of Diabetes
* Personal history of major psychiatric disorders
* UIse of prescribed or non-prescribed medications which may affect glucose homeostasis (e.g. steroids),
* Uncontrolled asthma,
* Current fever or upper respiratory infections
* Individuals who regularly perform high intensity exercise (>2 week),
* Pregnancy, lactation and women who are planning to become pregnant
* Current intake of >140g alcohol/week,
* Current smokers of cigarettes/cigars/marijuana,
* Current inatke of any illicit substance,
* Claustrophobia
* has donated blood within past 3 months.
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Study design
Purpose of the study
Other
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Allocation to intervention
NA
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Open (masking not used)
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Who is / are masked / blinded?
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Intervention assignment
Single group
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Other design features
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Phase
NA
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Completed
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Data analysis
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Reason for early stopping/withdrawal
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Other reasons
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Date of first participant enrolment
Anticipated
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Actual
1/03/2013
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
1/03/2014
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Sample size
Target
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Accrual to date
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Final
9
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Recruitment in Australia
Recruitment state(s)
SA
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Recruitment hospital [1]
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Royal Adelaide Hospital - Adelaide
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Recruitment postcode(s) [1]
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5000 - Adelaide
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Funding & Sponsors
Primary sponsor type
Other
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Name
University of Adelaide
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Address
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Country
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Ethics approval
Ethics application status
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Summary
Brief summary
Obesity is an epidemic in Western society and is the biggest risk factor for insulin resistance and type 2 diabetes. The investigators have recently shown that exposure to hyperbaric oxygen (HBO) leads to an increase insulin sensitivity in males ubjects and that this improvement can be measured in all men, not just those with diabetes. The aim of this study is to investigate the time course of this effect and explore the mechanisms involved. The investigators suspect that insulin sensitivity as measured by hyperinsulinaemic-euglycaemic clamp will be increased within the time-frame of one 2-hour hyperbaric oxygen exposure, and that the improvement will be measurable in females as well as males.
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Trial website
https://clinicaltrials.gov/study/NCT02009813
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Trial related presentations / publications
Chen M, Liu B, Wilkinson D, Hutchison AT, Thompson CH, Wittert GA, Heilbronn LK. Selenoprotein P is elevated in individuals with obesity, but is not independently associated with insulin resistance. Obes Res Clin Pract. 2017 Mar-Apr;11(2):227-232. doi: 10.1016/j.orcp.2016.07.004. Epub 2016 Aug 11.
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Public notes
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Contacts
Principal investigator
Name
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Leonie K Heilbronn, PhD
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Address
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University of Adelaide
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Country
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Phone
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Fax
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Email
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Contact person for public queries
Name
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Address
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Country
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Phone
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Fax
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Email
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Contact person for scientific queries
No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
No documents have been uploaded by study researchers.
Results not provided in
https://clinicaltrials.gov/study/NCT02009813
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