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Trial registered on ANZCTR
Registration number
ACTRN12606000166572
Ethics application status
Approved
Date submitted
28/04/2006
Date registered
10/05/2006
Date last updated
10/05/2006
Type of registration
Retrospectively registered
Titles & IDs
Public title
Monitoring of Skin Conductance to Assess Postoperative Pain Intensity
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Scientific title
Non-randomized, observational trial to assess correlations between skin conductance and postoperative pain in the recovery room
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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:
Postoperative pain
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Condition category
Condition code
Skin
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Pain management
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Intervention/exposure
Study type
Observational
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Patient registry
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Target follow-up duration
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Target follow-up type
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Description of intervention(s) / exposure
No intervention; we will observe the changes in skin conductance (measured by 3 electrodes at the palmar surface of the hand) in the postoperative period (meanwhile the patient is in the recovery room, so for approximately about 20 to 120 minutes) and its correlation with postoperative pain. Each single measurement will take approximately 10 seconds.
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Intervention code [1]
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None
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Comparator / control treatment
No comparator.
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Control group
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Outcomes
Primary outcome [1]
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Correlation between postoperative pain and skin conductance measures at several time points in the recovery period
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Assessment method [1]
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Timepoint [1]
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On arrival, every 2 minutes until pain free according to a patient's pain self-assessement numeric rating scale (NRS). Once pain free, the patients asked to rate their pain again after 10 min - Skin conductance will be recorded at this time as well.
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Secondary outcome [1]
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Correation between administration of analgetic drugs and skin conductance.
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Assessment method [1]
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Timepoint [1]
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Skin conductance will be measured before an analgetic drug is given and 2 minutes afterwards.
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Eligibility
Key inclusion criteria
Patients > 18 yrs, male and female patients.
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Minimum age
18
Years
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Maximum age
Not stated
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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
Pacemaker, betavlocker, atropine/glycopyrrolate medication, inability to communicate in English.
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Study design
Purpose
Natural history
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Duration
Cross-sectional
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Selection
Convenience sample
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Timing
Prospective
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Statistical methods / analysis
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Recruitment
Recruitment status
Recruiting
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Date of first participant enrolment
Anticipated
1/05/2006
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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
75
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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]
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Hospital
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Name [1]
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Dept. of Anaesthesia and Pain Medicine, Royal Perth Hospital
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Address [1]
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Country [1]
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Australia
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Primary sponsor type
Individual
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Name
Dr. Thomas Ledowski
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Address
Department of Anaesthesia and Pain Medicine
Royal Perth Hospital
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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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Nil
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Address [1]
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Country [1]
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Ethics approval
Ethics application status
Approved
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Summary
Brief summary
Previous investigations have shown that a relatively new method of skin conductance assessment (SC) correlates with periods of stress and pain (one of which might be during the period of recovery after anaesthesia) during an operation. The method follows the “lie detector principle”: the electric skin conductance is assessed by three self-sticking electrodes placed on the palm of the hand. People who are stressed often experience “sweaty palms” (due to changes in the autonomous nervous system that results in an increased filling of sweat glands). The wetter the palms, the higher the skin conductance recorded. We would like to compare the method of SCA to the results of score based pain assessment, like a visual analogue scale, during the recovery period after general anaesthesia. In this study we will recruit 75 patients. The patients will receive a standard anaesthesia and postoperative care. The SCA uses three ECG electrodes placed on the palmar surface of the hand. It is safe and not painful. We will not interfere with the anaesthesia or postoperative pain control in any way, but will observe the monitored data to get an idea about how well it correlates with our normal score based pain assessment. For that purpose, a nurse who is blinded to the readings of the skin conductance monitor will ask the patient to rate his pain on a numeric rating scale (0-10), as normally done to rate a patient's pain level in the recovery room. A second observer will record the results from the monitor ast the same time. The study will hopefully help to develop a better monitoring device for the assessment of postoperative pain. This might help with patients who have difficulties in expression of pain, for example, due to language problems or confusion.
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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
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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 public queries
Name
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Dr. Thomas Ledowski
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Address
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Department of Anaesthesia
Royal Perth Hospital
Wellington Street Campus
Perth WA 6000
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Country
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Australia
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Phone
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+61 8 92241036
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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. Thomas Ledowski
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Address
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Department of Anaesthesia
Royal Perth Hospital
Wellington Street Campus
Perth WA 6000
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Country
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Australia
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Phone
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+61 8 92241036
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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
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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