Ultrasound Visibility of Needles Used for Regional Nerve Block: An In Vitro Study

From: Regional Anesthesia and Pain Medicine | Date: September 1, 2004| Author: Schafhalter-Zoppoth, Ingeborg; McCulloch, Charles E; Gray, Andrew T | Copyright information

Background and Objectives: Ultrasound visibility of regional block needles is a critical component for safety and success of regional anesthetic procedures. The aim of the study was to formally assess factors that influence ultrasound visibility of needles used in regional anesthesia.

Methods: Regional block needles between 17- and 22-G diameter were inserted in a tissue equivalent phantom at angles from 0° to 65° relative to the phantom surface. For visibility enhancement, the needl...

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