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

January 8, 2024 updated by: University of New Mexico

Double Blinded Randomized Control Trial on the Effects of Ultrasound Probe Position on Ultrasound-guided Nerve Blocks

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.

Study Overview

Status

Terminated

Conditions

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 Type

Observational

Enrollment (Actual)

62

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New Mexico
      • Albuquerque, New Mexico, United States, 87120
        • University of New Mexico

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 55 years (Adult)

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Healthy volunteers naiive to ultrasound techniques

Description

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

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Time taken to perform a simulated interscalene block
Time Frame: 1 hour
Time taken to perform a simulated interscalene block after watching an instructional video on ultrasound guided regional anesthesia on the simulated targets
1 hour

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Duration where the entire needle is not visualized when performing the simulated interscalene block
Time Frame: 1 hour
Time taken to perform a simulated interscalene block after watching an instructional video on ultrasound guided regional anesthesia on the simulated targets
1 hour

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of New Mexico

Investigators

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

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

August 1, 2012

Primary Completion (Actual)

February 1, 2013

Study Completion (Actual)

February 1, 2013

Study Registration Dates

First Submitted

September 17, 2012

First Submitted That Met QC Criteria

September 20, 2012

First Posted (Estimated)

September 21, 2012

Study Record Updates

Last Update Posted (Actual)

January 10, 2024

Last Update Submitted That Met QC Criteria

January 8, 2024

Last Verified

January 1, 2024

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • Probeposition

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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