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Trial registered on ANZCTR


Registration number
ACTRN12620000931976
Ethics application status
Approved
Date submitted
30/06/2020
Date registered
18/09/2020
Date last updated
18/09/2020
Date data sharing statement initially provided
18/09/2020
Type of registration
Prospectively registered

Titles & IDs
Public title
Comparison of the effects on blood oxygen level between two delivery of oxygen methods during long endoscopic procedures
Scientific title
High-flow nasal cannula versus conventional oxygen therapy in preventing the loss of oxygenation for long, low-sedation-risk endoscopic procedures: a randomised single-blinded trial
Secondary ID [1] 301658 0
None
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Oxygen desaturation during endoscopic procedures 318088 0
Airway management 318374 0
Condition category
Condition code
Anaesthesiology 316115 316115 0 0
Anaesthetics

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Arm 1: High-flow nasal cannula (Optiflow® at 60L/min) versus conventional oxygen therapy (standard nasal cannula at 2L/min) for low-risk patients undergoing elective long (over 20 minutes) endoscopic procedures in an Australian tertiary hospital.
The high-flow nasal cannula, a device similar to the standard nasal prongs but which allows the delivery of high oxygen flows, will be used by the anaesthetist. This device consists of nasal tubes that are slightly larger in calibre and has the capability of delivering humidified oxygen. As per standard of practice, the device will be adapted to the nostrils and secured around the head prior to the sedation is commenced. As per standard of practice, supplementary oxygen is used throughout the whole endoscopic procedure and is maintained until the patient is fully recovered from sedation in the recovery room. The high flow will be maintained for the entire duration of the endoscopic procedure but can be brought down once the procedure has been finished and the patient sent to the recovery room, at the anaesthetist's discretion. The sedation and procedure data will be collected by one of the investigators or their delegates, in the room the endoscopic procedure is taking place.
Intervention code [1] 317968 0
Treatment: Devices
Intervention code [2] 317969 0
Prevention
Comparator / control treatment
Arm 2: Conventional oxygen therapy (standard nasal cannula at 2L/min) for low-risk for sedation patients undergoing elective short (over 20 minutes) endoscopic procedures in an Australian tertiary hospital.
The standard nasal cannula will be used by the anaesthetist as per standard of practice. The sedation and procedure data will be collected by one of the investigators or their delegates, in the room the endoscopic procedure is taking place.
Control group
Active

Outcomes
Primary outcome [1] 324300 0
Comparison of moderate oxygen desaturation rates (<90%) between the two groups, assessed through a finger pulse oximeter.
Timepoint [1] 324300 0
Assessed per patient, summarised at the end of each endoscopy procedure by the anaesthetist and endoscopist.
Secondary outcome [1] 384278 0
Comparison of variable oxygen desaturation rates (e.g. 94%, 92%) between the two groups, assessed through a finger pulse oximeter.
Timepoint [1] 384278 0
Assessed per patient, summarised at the end of each endoscopy procedure by the anaesthetist and endoscopist.
Secondary outcome [2] 384954 0
Comparison of symptoms post-procedure, procedure- and sedation-related adverse events (e.g. dry mouth, headache).
Post procedure symptoms will be assessed through a visual analog scale questionnaire.
Procedure- and sedation-related adverse events (e.g. number of desaturation events, perforation, bleeding) will be assessed directly by the anaesthetist and endoscopist of the case and filled into a data collection sheet
Timepoint [2] 384954 0
Assessed per patient, post-procedure, before discharge.

The vast majority of elective endoscopic procedures are discharged on the same day of the procedure, after the patient recovers from the sedation. The exact time a patient recovers from the sedation though is variable. In addition, other factors such as pain and sedation- and procedure-related adverse events can lead a patient to stay for a longer period of time.

Within these limitations, the plans are to assess sedation- and procedure-related adverse events during the procedure and populate the datasheet within one hour after the procedure had been finalised. The assessment of symptoms post-procedure is expected to take place at least 30 minutes after the patient has been sent to the recovery room and once he/she is able to maintain his/her eyes open spontaneously. The symptoms questionnaire is planned to be given to the patient within 6 hours after the procedure has been finalised.


Eligibility
Key inclusion criteria
• Patients referred for upper gastrointestinal endoscopic procedures predicted to last over 20 minutes (e.g. therapeutic endoscopic retrograde cholangiopancreatography)
• Age > 18 years
• Ability to give informed consent
Minimum age
18 Years
Maximum age
No limit
Gender
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
• Pregnancy
• Supplementary O2 dependency
• Emergency procedures
• Deemed by performing endoscopist as long (>20 minutes) procedure before randomisation
• Patients with high risk for sedation (i.e. presence of any of the following criteria: BMI greater or equal to 35, ASA IV or Mallampati 4)
• Capsule endoscopy procedure

Study design
Purpose of the study
Prevention
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s


Intervention assignment
Parallel
Other design features
Phase
Not Applicable
Type of endpoint(s)
Statistical methods / analysis

Recruitment
Recruitment status
Not yet recruiting
Date of first participant enrolment
Anticipated
Actual
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
Sample size
Target
Accrual to date
Final
Recruitment in Australia
Recruitment state(s)
VIC
Recruitment hospital [1] 17005 0
Austin Health - Austin Hospital - Heidelberg
Recruitment hospital [2] 17006 0
Austin Health - Heidelberg Repatriation Hospital - Heidelberg West
Recruitment postcode(s) [1] 30668 0
3084 - Heidelberg
Recruitment postcode(s) [2] 30669 0
3081 - Heidelberg West

Funding & Sponsors
Funding source category [1] 306092 0
Hospital
Name [1] 306092 0
Austin Health
Address [1] 306092 0
Austin Health
Gastroenterology Department
Anaesthetic Department
145 Studley Road, Heidelberg, VIC 3084
Country [1] 306092 0
Australia
Primary sponsor type
Hospital
Name
Austin Health
Address
145 Studley Road, Heidelberg, VIC 3084
Country
Australia
Secondary sponsor category [1] 306561 0
Individual
Name [1] 306561 0
Leonardo Zorron Cheng Tao Pu
Address [1] 306561 0
Austin Health
Gastroenterology Department
145 Studley Road, Heidelberg, VIC 3084
Country [1] 306561 0
Australia

Ethics approval
Ethics application status
Approved
Ethics committee name [1] 306312 0
Austin Health Human Research Ethics Committee
Ethics committee address [1] 306312 0
145 Studley Road, Heidelberg, VIC 3084
Ethics committee country [1] 306312 0
Australia
Date submitted for ethics approval [1] 306312 0
Approval date [1] 306312 0
29/06/2020
Ethics approval number [1] 306312 0
HREC/63144/Austin-2020

Summary
Brief summary
Doctors currently examine the human gastrointestinal tract using a device called an endoscope, which contains a camera that enables the doctor to view and treat diseases from within the gastrointestinal tract. Most endoscopic procedures are done under sedation, what means that people are put asleep during such procedures by an Anaesthetist. During the examination, it is costumery that the patients' breathing capabilities become mildly impaired. For this reason, the Anaesthetists utilise supplementary oxygen to avoid the oxygen levels in your blood getting too low. Although we know that using some supplementary oxygen is better than using none, it is still under debate what is the ideal amount (or flow) of oxygen that should be used to avoid the loss of oxygenation. The purpose of this study is to determine whether two devices that deliver two different flows of oxygen (standard nasal cannula - 2 L/min or high-flow nasal cannula - 60L/min) are similar or different in preventing the loss of oxygenation while under sedation for long endoscopic procedures.
Trial website
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 103466 0
Dr Leonardo Zorron Cheng Tao Pu
Address 103466 0
Austin Health
Gastroenterology Department
145 Studley Road, Heidelberg, VIC 3084
Country 103466 0
Australia
Phone 103466 0
+61 433 930 442
Fax 103466 0
Email 103466 0
leo.zorronchengtaopu@austin.org.au
Contact person for public queries
Name 103467 0
Dr Leonardo Zorron Cheng Tao Pu
Address 103467 0
Austin Health
Gastroenterology Department
145 Studley Road, Heidelberg, VIC 3084
Country 103467 0
Australia
Phone 103467 0
+61 433 930 442
Fax 103467 0
Email 103467 0
leo.zorronchengtaopu@austin.org.au
Contact person for scientific queries
Name 103468 0
Dr Leonardo Zorron Cheng Tao Pu
Address 103468 0
Austin Health
Gastroenterology Department
145 Studley Road, Heidelberg, VIC 3084
Country 103468 0
Australia
Phone 103468 0
+61 433 930 442
Fax 103468 0
Email 103468 0
leo.zorronchengtaopu@austin.org.au

Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
Yes
What data in particular will be shared?
Only summarised/grouped and de-identified data will be publicly shared as per HREC submission. No IPD will be publicly shared. No raw data will be publicly available.

However, upon request by another research team, all of the individual participant data collected during the trial, after de-identification, might be provided (subjected to criteria listed below).
When will data be available (start and end dates)?
Immediately following publication, until 15 years after publication.
Available to whom?
Only research teams who provide a methodologically sound proposal might ask for IPD. Requests will be evaluated on a case-by-case basis at the discretion of the PI.
Available for what types of analyses?
Only for IPD meta-analyses.
How or where can data be obtained?
Access subject to approvals by Principal Investigator (through secure institutional email - leo.zorronchengtaopu@austin.org.au)
What supporting documents are/will be available?
Ethical approval
How or where can supporting documents be obtained?
Type [1] 8366 0
Ethical approval
Citation [1] 8366 0
Link [1] 8366 0
Email [1] 8366 0
leo.zorronchengtaopu@austin.org.au
Other [1] 8366 0
Attachment [1] 8366 0
Summary results
No Results