Study Results
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View full resultsBasic Information
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COMPLETED
40 participants
OBSERVATIONAL
2018-04-01
2019-01-01
Brief Summary
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The catheters often stop working before we remove them for unclear reasons. The investigators think this is because the catheters become dislodged from where it was meant to be. This could be due to repeated movements of the catheter tip brought on by patients contracting their leg muscles when they ambulate or perform physio.
The investigators want to confirm this by measuring the distance from a fixed spot on the patient's thigh to the adductor canal using an ultrasound machine. The leg will be measured in various positions to simulate muscle movements. A significant change in the distance could possibly contribute to catheter dislodgement and result in catheter failure.
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Detailed Description
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Conditions
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Study Design
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CASE_ONLY
CROSS_SECTIONAL
Study Groups
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TKA Patients
Measurements Using Ultrasound
Ultrasound measurements will be made in 5 positions. The ultrasound probe will be measuring from a fixed external location of the thigh. The 5 positions include: external rotation, neutral, manual tissue external rotation, straight leg raise at 30 degrees and hip/knee flexion at 90 degrees.
Interventions
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Measurements Using Ultrasound
Ultrasound measurements will be made in 5 positions. The ultrasound probe will be measuring from a fixed external location of the thigh. The 5 positions include: external rotation, neutral, manual tissue external rotation, straight leg raise at 30 degrees and hip/knee flexion at 90 degrees.
Eligibility Criteria
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Inclusion Criteria
* Patients must be undergoing a primary total knee arthroplasty with neuraxial anaesthesia
Exclusion Criteria
18 Years
ALL
No
Sponsors
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University of British Columbia
OTHER
Responsible Party
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Marcus Tholin
Principal Investigator
Principal Investigators
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Jason Wilson, MD
Role: PRINCIPAL_INVESTIGATOR
University of British Columbia
Locations
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University of British Columbia Hospital
Vancouver, British Columbia, Canada
Countries
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References
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Tholin M, Wilson J, Lee S, Tang R, Sawka A, Vaghadia H. Impact of leg movement on skin-adductor canal distance: a potential cause for catheter tip displacement? Can J Anaesth. 2020 Aug;67(8):936-941. doi: 10.1007/s12630-020-01693-6. Epub 2020 May 8.
Provided Documents
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Document Type: Study Protocol and Statistical Analysis Plan
Other Identifiers
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H17-02633
Identifier Type: -
Identifier Source: org_study_id
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