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Trial registered on ANZCTR
Registration number
ACTRN12613000126718
Ethics application status
Approved
Date submitted
31/01/2013
Date registered
1/02/2013
Date last updated
1/02/2013
Type of registration
Retrospectively registered
Titles & IDs
Public title
The anaesthesia pre-oxygenation trial - using O2 Flush and Nasal oxygen for pre-oxygenation compared to traditional methods.
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Scientific title
The effect of anaesthesia pre-oxygenation with O2 flush and nasal prongs on end tidal O2 in healthy adult volunteers
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Secondary ID [1]
281874
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NIL
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Universal Trial Number (UTN)
U1111-1139-1075
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Anaesthesia preoxygenation
288258
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Condition category
Condition code
Anaesthesiology
288610
288610
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0
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Anaesthetics
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Each participants will perform repeated pre oxygenation in a computer generated randomised fashion.
With a good mask seal
1. Standard - Anaesthesia machine (15L/min)
2. Standard PLUS nasal prong oxygenation
3. Standard PLUS anaesthesia machine oxygen flush
With simulated face mask leak
4. Standard
5. Standard PLUS nasal prong oxygenation
6. Standard PLUS anaesthesia machine oxygen flush
Each of these interventions will be assess using deep breathing for 90 seconds and tidal breathing for 3 minutes.
The wash out period will be a minimum of 3 minutes and until the end tidal O2 is less than 20%
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Intervention code [1]
286436
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Treatment: Other
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Comparator / control treatment
Control is standard preoxygenation with anaesthesia machine (with and with out a simulated mask leak)
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Control group
Active
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Outcomes
Primary outcome [1]
288762
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End tidal O2 (exhaled breath oxygen content) as measure by standard anaesthesia machine
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Assessment method [1]
288762
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Timepoint [1]
288762
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Immediately post preoxygenation
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Secondary outcome [1]
300923
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Tolerance on a verbal analogue scale (0-10)
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Assessment method [1]
300923
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Timepoint [1]
300923
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Immediately post preoxygenation
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Eligibility
Key inclusion criteria
1. Age 18 and over
2. Healthy volunteers
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Minimum age
18
Years
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Maximum age
65
Years
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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
1. Refusal or withdrawal of consent at any stage
2. Pregnancy
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Participants will be recruited by a junior member of staff
Participants will be randomised to a treatment sequence based on a Latin square design
The treatment sequence will be revealed immediately before the procedure in a sealed envelope.
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Participants will be randomised to a treatment sequence based on a Latin square design
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people receiving the treatment/s
The people analysing the results/data
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Intervention assignment
Crossover
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
Efficacy
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Statistical methods / analysis
Analysis of the primary outcome will be conducted using general linear model procedures accounting for the crossover design of the study.
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Recruitment
Recruitment status
Recruiting
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Date of first participant enrolment
Anticipated
10/01/2013
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Actual
10/01/2013
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Date of last participant enrolment
Anticipated
10/05/2013
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
24
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
WA
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Recruitment hospital [1]
524
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King Edward Memorial Hospital - Subiaco
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Recruitment postcode(s) [1]
6262
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6008 - Subiaco
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Funding & Sponsors
Funding source category [1]
286660
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Hospital
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Name [1]
286660
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King Edward Memorial Hospital
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Address [1]
286660
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King Edward Memorial Hospital
374 Bagot rd
Subiaco
Western Australia
6008
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Country [1]
286660
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Australia
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Primary sponsor type
Hospital
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Name
King Edward Memorial Hospital
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Address
King Edward Memorial Hospital
374 Bagot rd
Subiaco
Western Australia
6008
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Country
Australia
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Secondary sponsor category [1]
285438
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None
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Name [1]
285438
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Address [1]
285438
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Country [1]
285438
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
288731
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King Edward Memorial Hospital for Women (KEMH) Ethics & Research Governance
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Ethics committee address [1]
288731
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GPO Box D184 Perth WA 6840
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Ethics committee country [1]
288731
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Australia
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Date submitted for ethics approval [1]
288731
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Approval date [1]
288731
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Ethics approval number [1]
288731
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2049/EW
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Summary
Brief summary
Prior to general anaesthesia the standard of care is to pre-oxygenation all patients. This involves the patient breathing 100% oxygen via a face mask. The 3 most common methods of pre oxygenation involve 4 deep breaths over 30 seconds, 8 deep breaths over 60 seconds or 3 minutes of tidal volume breathing (normal breathing) using high flow 100% oxygen (15L per minute via the anaesthesia machine with a face mask). The most common reasons for poor preoxygenation is an inadequate face mask seal resulting in the patient breathing room air (low oxygen content) through the leak. Nasal oxygen and the anaesthesia machine oxygen flush delivery higher flow rates than the standard method by the the anaesthesia machine so may reduce the amount of inspired air from the leak. Study Hypothesis - High flow oxygen with nasal oxygen or anaesthesia machine oxygen flush produces higher end tidal oxygen levels (better pre oxygenation) in the simulated mask leak scenario.
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
37514
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Dr Twain Russell
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Address
37514
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King Edward Memorial Hospital
374 Bagot rd
Subiaco
WA
6008
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Country
37514
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Australia
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Phone
37514
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+61 (08) 9340 2222
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Fax
37514
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Email
37514
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[email protected]
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Contact person for public queries
Name
37515
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Twain Russell
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Address
37515
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King Edward Memorial Hospital
374 Bagot rd
Subiaco
WA
6008
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Country
37515
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Australia
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Phone
37515
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+61 (08) 9340 2222
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Fax
37515
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Email
37515
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[email protected]
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Contact person for scientific queries
Name
37516
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Twain Russell
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Address
37516
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King Edward Memorial Hospital
374 Bagot rd
Subiaco
WA
6008
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Country
37516
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Australia
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Phone
37516
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+ 61 (08) 9340 2222
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Fax
37516
0
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Email
37516
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[email protected]
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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
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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