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

This study is currently recruiting participants.
Verified September 2012 by University of New Mexico
Sponsor:
Information provided by (Responsible Party):
University of New Mexico
ClinicalTrials.gov Identifier:
NCT01690156
First received: September 17, 2012
Last updated: September 20, 2012
Last verified: September 2012
History of Changes
  Purpose

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
In-plane Ultrasound-guided Regional Anesthesia Performance

Study Type: Observational
Study Design: 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

Further study details as provided by University of New Mexico:

Primary Outcome Measures:
  • Time taken to perform a simulated interscalene block [ Time Frame: 1 hour ] [ Designated as safety issue: No ]
    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:
  • Duration where the entire needle is not visualized when performing the simulated interscalene block [ Time Frame: 1 hour ] [ Designated as safety issue: No ]
    Time taken to perform a simulated interscalene block after watching an instructional video on ultrasound guided regional anesthesia on the simulated targets


Estimated Enrollment: 62
Study Start Date: August 2012
Estimated Study Completion Date: April 2013
Estimated Primary Completion Date: March 2013 (Final data collection date for primary outcome measure)
Groups/Cohorts
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

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.

  Eligibility

Ages Eligible for Study:   18 Years to 55 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Healthy volunteers naiive to ultrasound techniques

Criteria

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
Please refer to this study by its ClinicalTrials.gov identifier: NCT01690156

Contacts
Contact: Nicholas C Lam, MD 5052722610 nlam@salud.unm.edu
Contact: Timothy Petersen, phD 5052722610 tpetersen@salud.unm.edu

Locations
United States, New Mexico
University of New Mexico Recruiting
Albuquerque, New Mexico, United States, 87120
Principal Investigator: Nicholas C Lam, MD            
Sub-Investigator: Elizabeth B Baker, MD            
Sponsors and Collaborators
University of New Mexico
Investigators
Principal Investigator: Nicholas C Lam, MD University of New Mexico
  More Information

No publications provided

Responsible Party: University of New Mexico
ClinicalTrials.gov Identifier: NCT01690156     History of Changes
Other Study ID Numbers: Probeposition
Study First Received: September 17, 2012
Last Updated: September 20, 2012
Health Authority: United States: Data and Safety Monitoring Board

Keywords provided by University of New Mexico:
In-plane
Ultrasound-guided regional anesthesia performance
Probe position
Needle visualization

ClinicalTrials.gov processed this record on June 18, 2013