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

Terminated

• Conditions: In-plane Ultrasound-guided Regional Anesthesia Performance

• Registration Number: NCT01690156
• Lead Sponsor: University of New Mexico

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.

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 Timeline

• Study Start: 2012-08
• Study First Submitted: 2012-09-17
• Study First Submitted QC: 2012-09-20
• Study First Posted: 2012-09-21
• Primary Completion: 2013-02
• Study Completion: 2013-02
• Status Verified: 2024-01
• Last Update Submitted: 2024-01-08
• Last Update Posted: 2024-01-10

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 62

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 & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
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

Name	Time	Method
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

Trial Locations

Locations (1)

University of New Mexico; 🇺🇸 Albuquerque, New Mexico, United States