The Effect of Leg Position on the Sciatic Nerve on Sonogram
Influence of Lower Extremity Positioning During Anterior-approach Ultrasound-guided Sciatic Nerve Block: Depth and Visibility
1 other identifier
observational
45
1 country
1
Brief Summary
Little is known about which posture of lower extremity makes it easier to access to the sciatic nerve. In this study, the investigators aimed to identify the most appropriate positioning of the lower extremity during anterior-approach ultrasound-guided sciatic nerve block.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for all trials
Started Aug 2018
Shorter than P25 for all trials
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
August 17, 2018
CompletedStudy Start
First participant enrolled
August 30, 2018
CompletedFirst Posted
Study publicly available on registry
September 20, 2018
CompletedPrimary Completion
Last participant's last visit for primary outcome
October 11, 2018
CompletedStudy Completion
Last participant's last visit for all outcomes
October 11, 2018
CompletedDecember 20, 2018
December 1, 2018
1 month
August 17, 2018
December 19, 2018
Conditions
Outcome Measures
Primary Outcomes (1)
Visibility of sciatic nerve
Visibility of sciatic nerve at each position assessed using a scoring system (0, no nerve identified; 1, nerve identified with a high probability; 2, nerve identified, but most of it not visible; 3, nerve identified, more than 50% of its borders can be precisely distinguished from surrounding structures; 4, nerve completely visible, but fascicles poorly defined; 5, nerve completely visible and multiple fascicles identifiable.)
during 10 minutes of anesthesia induction
Secondary Outcomes (1)
Depth of sciatic nerve
during 10 minutes of anesthesia induction
Study Arms (4)
Group N
Neutral position
Group E
External rotation of leg by 45 degrees
Group EF45
External rotation of leg by 45 degrees, hip flexion by 45 degrees, and knee flexion by 45 degrees
Group EF15
External rotation of leg by 45 degrees, hip flexion by 15 degrees, and knee flexion by 15 degrees
Interventions
hip flexion by 15/45 degrees and knee flexion by 15/45 degrees
Eligibility Criteria
Patients undergoing knee surgery requiring peripheral nerve block
You may qualify if:
- ASA PS 1-3
- patients undergoing knee surgery requiring peripheral nerve block
You may not qualify if:
- patients who refuse to participate in the study
- BMI \> 40 kg/m2
- patients who have congenital abnormality on leg
- patients who have surgery or trauma on hip/knee
- patients who cannot move freely due to the contracture
- patients who are judged ineligible by the medical staff to participate in the study for other reasons
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Asan Medical Center
Seoul, 05505, South Korea
Study Officials
- PRINCIPAL INVESTIGATOR
Won Uk Koh, M.D., Ph.D.
University of Ulsan, College of Medicine, Asan Medical Center
Study Design
- Study Type
- observational
- Observational Model
- CASE CROSSOVER
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Clinical Instructor
Study Record Dates
First Submitted
August 17, 2018
First Posted
September 20, 2018
Study Start
August 30, 2018
Primary Completion
October 11, 2018
Study Completion
October 11, 2018
Last Updated
December 20, 2018
Record last verified: 2018-12