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Trial registered on ANZCTR
Registration number
ACTRN12612000231842
Ethics application status
Approved
Date submitted
22/02/2012
Date registered
23/02/2012
Date last updated
23/02/2012
Type of registration
Prospectively registered
Titles & IDs
Public title
Effect of Fasting Time for Water on the Acidity and Volume of Stomach Content
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Scientific title
Effect of Fasting Time for Water on Gastric pH and Volume in adult patients scheduled for elective gastroscopy
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Secondary ID [1]
280016
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Nil
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Universal Trial Number (UTN)
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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:
Fasting times for water before induction of anaesthesia
285927
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Condition category
Condition code
Oral and Gastrointestinal
286115
286115
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0
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Normal oral and gastrointestinal development and function
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Anaesthesiology
286118
286118
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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
Comparison of pH and volume of gastric content following two fasting protocols for water before anaesthesia
Arm 1: Standard fasting protocol (fasting for solids for 6 hours, fasting for clear fluids for 2 hours), 200ml water consumption at 45-60 mins prior to anaesthesia
Arm 2: Standard fasting protocol (fasting for solids for 6 hours, fasting for clear fluids for 2 hours), 200 ml water consumption at 90-150 mins prior to anaesthesia
Test water volume: 200ml (standard volume of drinking cup in hospital setting)
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Intervention code [1]
284337
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Treatment: Other
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Intervention code [2]
284340
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Prevention
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Comparator / control treatment
Arm 2 is the control group whereby subjects follow a routine fasting protocol for water which is a minimum of 90 mins before anaesthesia.
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Control group
Active
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Outcomes
Primary outcome [1]
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Primary Endpoint 1: pH of gastric content
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Assessment method [1]
286589
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Timepoint [1]
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Upon aspiration of gastric content via gastroscope following induction of anaesthesia
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Primary outcome [2]
286590
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Primary Endpoint 2: Volume of gastric content
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Assessment method [2]
286590
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Timepoint [2]
286590
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Upon aspiration of gastric content via gastroscope following induction of anaesthesia
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Secondary outcome [1]
296223
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Nil
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Assessment method [1]
296223
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Timepoint [1]
296223
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Nil
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Eligibility
Key inclusion criteria
Adult patients scheduled for elective gastrocopy
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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?
No
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Key exclusion criteria
Patients who
i) are under 18 years of age
ii) are not competent in English
iii) are pregnant
iv) have active upper gastrointestinal haemorrhage
v) have achalasia or gastric outlet obstruction
vi) have Insulin requiring Diabetes Mellitus
vii) has had previous gastric surgery
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Study design
Purpose of the study
Prevention
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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)
Allocation concealment procedure si done by sealed opaque envelopes
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Simple randomisation by using a randomization table created by a computer software (i.e. computerised sequence generation)
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
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Intervention assignment
Parallel
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
Safety
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Statistical methods / analysis
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Recruitment
Recruitment status
Not yet recruiting
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Date of first participant enrolment
Anticipated
1/04/2012
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Actual
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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
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Sample size
Target
90
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
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Funding & Sponsors
Funding source category [1]
284768
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Self funded/Unfunded
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Name [1]
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Address [1]
284768
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Country [1]
284768
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Australia
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Primary sponsor type
Hospital
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Name
Monash Medical Centre
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Address
246 Clayton Road
Clayton
VIC 3168
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Country
Australia
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Secondary sponsor category [1]
283659
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None
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Name [1]
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Nil
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Address [1]
283659
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Nil
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Country [1]
283659
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
286763
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Southern Health
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Ethics committee address [1]
286763
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246 Clayton Road Clayton 3168 VIC
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Ethics committee country [1]
286763
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Australia
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Date submitted for ethics approval [1]
286763
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Approval date [1]
286763
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09/02/2012
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Ethics approval number [1]
286763
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12011A
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Summary
Brief summary
Fasting of solids and fluids before general anaesthesia is essential to patient safety in order to reduce the risk of the pulmonary aspiration. The high acidity of stomach contents upon aspiration can cause significant damage to lung tissue. The estimated incidence of pulmonary aspiration is low, ranging between 1/2000 to 1/14000 with morbidity relating to aspiration even lower ranging between 1/4000 to 1/99000. Current fasting guidelines according to American Society of Anesthesiologists recommend a 2-hour fast for clear fluids before general anaesthesia. However, clear scientific evidence supporting this recommendation is lacking and the ideal fasting time and maximal permissible volume for water have yet to be determined. New evidence suggests that water up to 450mls can be safely consumed up to 90 minutes before induction of anaesthesia and that stomach volumes are lower in those who had consumed preoperative water than those who had a fast of 6 hours. Others have demonstrated that preoperative water consumption can also decrease patient thirst and anxiety without adverse effects. The proposed project aims to investigate the effect on stomach contents as measured by level of acidity and volume, following consumption of 200 ml of water up to 45 minutes before general anaesthesia. For this pilot study, approximately 90 elective adult patients scheduled for gastroscopy will be recruited. Patients will be randomly allocated into 2 groups. Both groups will be fasted for solids and clear fluids as per standard guidelines (6 hours for solids and 2 hours for clear fluid) but they will then be randomized to drink 200 ml (standard drinking cup) at 90-150 minutes or 45-60 minutes prior to their procedure respectively. Immediately post induction, gastric content is suctioned and emptied under direct vision via the gastroscope to assess for its volume and pH. This will strengthen the body of evidence that water consumption before general anesthesia up to 45 minutes before anaesthesia has minimal effect on gastric contents and may be potentially beneficial to patients.
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Trial website
Nil
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Trial related presentations / publications
Nil
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Public notes
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Contacts
Principal investigator
Name
33826
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Address
33826
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Country
33826
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Phone
33826
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Fax
33826
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Email
33826
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Contact person for public queries
Name
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Lyndon Siu
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Address
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Monash Medical Centre - Department of Anaesthesia
246 Clayton Road
Clayton
VIC 3168
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Country
17073
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Australia
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Phone
17073
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+61 3 95943283
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Fax
17073
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Email
17073
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[email protected]
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Contact person for scientific queries
Name
8001
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Lyndon Siu
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Address
8001
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Monash Medical Centre - Department of Anaesthesia
246 Clayton Road
Clayton
VIC 3168
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Country
8001
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Australia
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Phone
8001
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+61 3 95943283
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Fax
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Email
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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
Type
Is Peer Reviewed?
DOI
Citations or Other Details
Attachment
Study results article
Yes
Journal of Anesthesia and Clinical Research Aug...
[
More Details
]
362148-(Uploaded-05-08-2019-11-01-20)-Journal results publication.pdf
Study results article
Yes
362148-(Uploaded-05-08-2019-11-01-49)-Journal results publication.pdf
Documents added automatically
No additional documents have been identified.
Download to PDF