Skin to Adductor Canal Distance in Various Positions

Knee Arthritis Clinical Trial

— Skin to AC  

Official title:

The Impact of Leg Movement on the Skin to Adductor Canal Distance: a Potential Cause for Catheter Displacement?

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03562559
• Other study ID #: H17-02633
• Status: Completed
• Start date: April 1, 2018
• Est. completion date: January 1, 2019

Study information

• Verified date: September 2019
• Source: University of British Columbia
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial 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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 40
• Est. completion date: January 1, 2019
• Est. primary completion date: January 1, 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

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

Exclusion Criteria:

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

Related Conditions & MeSH terms

• Arthritis
• Knee Arthritis

Intervention

Other:
• 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.

Locations

Country	Name	City	State
Canada	University of British Columbia Hospital	Vancouver	British Columbia

Sponsors (1)

Lead Sponsor	Collaborator
University of British Columbia

Country where clinical trial is conducted

Canada, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Skin to Adductor Canal Distance Disparity	The largest distance disparity as measured from the 5 different leg positions	Measurements will be made on the day of surgery, no other assessment or follow up needed