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Trial registered on ANZCTR
Registration number
ACTRN12607000435482
Ethics application status
Approved
Date submitted
21/08/2007
Date registered
29/08/2007
Date last updated
25/06/2009
Type of registration
Retrospectively registered
Titles & IDs
Public title
The effect of beachchair position on cerebral blood flow during shoulder arthroscopy
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Scientific title
The effect of beachchair position on cerebral blood flow during shoulder arthroscopy
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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:
cerebral blood flow during anaesthesia
2281
0
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Condition category
Condition code
Anaesthesiology
2375
2375
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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
This study will investigate the effects of the beach chair position during shoulder surgery on cerebral blood flow, with either regional or general anaesthesia. The duration of intervention is 1 hour. The sedation will be with midazolam 1-5mg and fentanyl 10-100mcg. general anaesthesia will be induced with propofol 50-200mg and maintained on sevoflurane 2-4%.
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Intervention code [1]
1994
0
Treatment: Other
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Comparator / control treatment
General anaesthesia versus sedation
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Control group
Active
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Outcomes
Primary outcome [1]
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Cerebral blood flow in the beach chair position
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Assessment method [1]
3272
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Timepoint [1]
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From supine position to beach chair position
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Secondary outcome [1]
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Intravenous fluid requirements
dose of vasopressor
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Assessment method [1]
5456
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Timepoint [1]
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End of anaesthetic
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Eligibility
Key inclusion criteria
>18 years
able to provide informed consent
shoulder surgery suitable for beach chair position
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Minimum age
18
Years
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Maximum age
100
Years
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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
Exclusion criteria:
Previous cerebrovascular accident
Current cardiac disease including pacemaker
Prior carotid endarterectomy
Contraindications to interscalene block
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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)
Informed consent followed by opening of sealed envelopes. Underlined the study.
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Equal numbers of randomisation pairs, shuffled and assigned to sealed envelopes by an independent person.
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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
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
Completed
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Date of first participant enrolment
Anticipated
22/08/2007
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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
70
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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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Recruitment postcode(s) [1]
379
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3181
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Funding & Sponsors
Funding source category [1]
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University
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Name [1]
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The University of Melbourne
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Address [1]
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level 8, medical sciences building
University of Melbourne, Carlton, Victoria, 3010
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Country [1]
2533
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Australia
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Primary sponsor type
Hospital
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Name
The Avenue Hospital
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Address
40 the Avenue
Windsor, Victoria, 3181
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Country
Australia
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Secondary sponsor category [1]
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None
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Name [1]
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Address [1]
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Country [1]
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Other collaborator category [1]
15
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University
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Name [1]
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The University of Melbourne
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Address [1]
15
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Carlton, Victoria, 3010
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Country [1]
15
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Australia
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
4448
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The Avenue Hospital HREC
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Ethics committee address [1]
4448
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40 the Avenue Windsor, Victoria, 3181
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Ethics committee country [1]
4448
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Date submitted for ethics approval [1]
4448
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Approval date [1]
4448
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04/07/2007
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Ethics approval number [1]
4448
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HREC# 084
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Summary
Brief summary
Shoulder arthroscopy, or keyhole surgery of the shoulder, has been an accepted form of surgery for many years. The surgery can be performed with the patient sitting upright (beachchair position), or lying on their side. Both techniques have been performed successfully for many years. The choice is usually dependent on the professional experience and preference of the surgeon. One of the research investigators, typically performs this surgery in the upright position. Some medical professionals are of the opinion that performing shoulder arthroscopy in the upright position, can affect flow of blood to the brain. This is not something that has been conclusively demonstrated by research to date. We use a technique of anaesthesia that we believe is very safe and is used widely throughout the world. Further, we are of the opinion that it does not adversely affect flow of blood to the brain. The surgery will be performed using the anaesthetic technique that we use for the majority of the surgeon’s cases. The patient will receive a nerve block that will anaesthetise the arm receiving surgery. This will be combined with either a general anaesthetic or intravenous sedation. We will use an ultrasound probe to monitor the flow of blood in the major arteries in the patient’s neck. This will give us an indication of the flow of blood to the brain. The increased monitoring will ensure patient safety during the procedure, as we will be able to detect previously unknown side-to-side differences in blood flow in the individual patients. The research will help us prove to others unfamiliar with the technique, that it is safe for this surgery.
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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
27995
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Address
27995
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Country
27995
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Phone
27995
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Fax
27995
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Email
27995
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Contact person for public queries
Name
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Dr Paul Soeding
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Address
11152
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Cardiovascular therapeutics unit
level 8, medical sciences building
University of Melbourne, Carlton, Victoria, 3010
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Country
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Australia
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Phone
11152
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+ 61383445673
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Fax
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Email
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[email protected]
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Contact person for scientific queries
Name
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Dr Paul Soeding
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Address
2080
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level 8, medical sciences building
University of Melbourne, Carlton, Victoria, 3010
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Country
2080
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Australia
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Phone
2080
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+ 61383445673
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Fax
2080
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Email
2080
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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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