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Trial on the Effects of Ultrasound Probe Position on Ultrasound-guided Nerve Blocks

Sponsor
University of New Mexico (Other)
Overall Status
Completed
CT.gov ID
NCT01690156
Collaborator
(none)
62
Enrollment
1
Location
6
Duration (Months)
10.3
Patients Per Site Per Month

Study Details

Study Description

Brief Summary

Ultrasound has been used to guide a needle to inject local anesthetics around nerves. This is usually done in the same plane as the ultrasound beam in America and is known as an in-plane technique. When done correctly, the entire needle is visualized on the ultrasound screen as it approaches the nerves which are also seen on the same screen the entire time. The ultrasound probe can be held perpendicular or parallel to the shoulders of the person performing the in-plane technique. Our hypothesis is that holding the ultrasound probe perpendicular to the shoulder is superior to holding the probe parallel to the shoulder during an in-plane ultrasound guided regional anesthesia technique.

Condition or Disease Intervention/Treatment Phase

    Detailed Description

    Right handed volunteers with no prior exposure to ultrasound techniques are used in this study. They will be randomly assigned to be shown an instructional video on how to perform an in-plane ultrasound guided needling technique on a realistic simulation target. The two videos are identical with the exception of the probe position. A blinded assessor will time the volunteers performance behind a screen and note the duration in which the needle is not visualized in the ultrasound screen.

    Study Design

    Study Type:
    Observational
    Actual Enrollment :
    62 participants
    Observational Model:
    Case-Control
    Time Perspective:
    Prospective
    Official Title:
    Double Blinded Randomized Control Trial on the Effects of Ultrasound Probe Position on Ultrasound-guided Nerve Blocks
    Study Start Date :
    Aug 1, 2012
    Actual Primary Completion Date :
    Feb 1, 2013
    Actual Study Completion Date :
    Feb 1, 2013

    Arms and Interventions

    Arm Intervention/Treatment
    Parallel Probe Position

    Performing the simulated interscalene block with the ultrasound probe parallel to the shoulders of the person performing the block
    Perpendicular Probe Position

    Performing the simulated interscalene block with the ultrasound probe perpendicular to the shoulders of the person performing the block

    Outcome Measures

    Primary Outcome Measures

    1. Time taken to perform a simulated interscalene block [1 hour]

      Time taken to perform a simulated interscalene block after watching an instructional video on ultrasound guided regional anesthesia on the simulated targets

    Secondary Outcome Measures

    1. Duration where the entire needle is not visualized when performing the simulated interscalene block [1 hour]

      Time taken to perform a simulated interscalene block after watching an instructional video on ultrasound guided regional anesthesia on the simulated targets

    Eligibility Criteria

    Criteria

    Ages Eligible for Study:
    18 Years to 55 Years
    Sexes Eligible for Study:
    All
    Accepts Healthy Volunteers:
    Yes
    Inclusion Criteria:

    • Healthy volunteers

    • Right handed

    • Aged 18 to 55

    Exclusion Criteria:

    • Any person who has prior knowledge about ultrasound imaging or regional anesthesia

    • Any person who has prior experience with laparoscopy or biopsy

    • Any person who has problems with depth of field or simple hand eye co-ordination task

    Contacts and Locations

    Locations

    Site City State Country Postal Code
    1 University of New Mexico Albuquerque New Mexico United States 87120

    Sponsors and Collaborators

    • University of New Mexico

    Investigators

    • Principal Investigator: Nicholas C Lam, MD, University of New Mexico

    Study Documents (Full-Text)

    None provided.

    More Information

    Publications

    None provided.
    Responsible Party:
    University of New Mexico
    ClinicalTrials.gov Identifier:
    NCT01690156
    Other Study ID Numbers:
    • Probeposition
    First Posted:
    Sep 21, 2012
    Last Update Posted:
    Sep 25, 2019
    Last Verified:
    Sep 1, 2019
    Keywords provided by University of New Mexico
    In-plane
    Ultrasound-guided regional anesthesia performance
    Probe position
    Needle visualization

    Study Results

    No Results Posted as of Sep 25, 2019