Skin to Adductor Canal Distance in Various Positions

Completed

• Conditions: Knee Arthritis
• Interventions: Other: Measurements Using Ultrasound

• Registration Number: NCT03562559
• Lead Sponsor: University of British Columbia

Brief Summary

To control pain after total knee replacement surgery a catheter (tubing) is sometimes inserted into an anatomic space containing nerves that provide sensation to parts of the knee. This space is called the adductor canal.

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2018-04-01
• Study First Submitted: 2018-05-29
• Study First Submitted QC: 2018-06-18
• Study First Posted: 2018-06-19
• Primary Completion: 2019-01-01
• Study Completion: 2019-01-01
• Results First Submitted: 2019-01-05
• Status Verified: 2019-09
• Results First Submitted QC: 2019-09-24
• Last Update Submitted: 2019-09-24
• Results First Posted: 2019-09-27
• Last Update Posted: 2019-09-27

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 40

Inclusion Criteria

• Patients over or equal to the age of 18 years old who can understand the study protocol and are able to give consent
• Patients must be undergoing a primary total knee arthroplasty with neuraxial anaesthesia

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Exclusion Criteria

• Patients with an allergy to ultrasound transducer gel or measuring tape

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Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
TKA Patients	Measurements Using Ultrasound	-

Primary Outcome Measures

Name	Time	Method
Skin to Adductor Canal Distance Disparity	Measurements will be made on the day of surgery, no other assessment or follow up needed	The largest distance disparity as measured from the 5 different leg positions

Trial Locations

Locations (1)

University of British Columbia Hospital; 🇨🇦 Vancouver, British Columbia, Canada