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Maximizing Visualization of the Needle During Ultrasound Procedures 

Maximizing Visualization of the Needle During Ultrasound Procedures
Chapter:
Maximizing Visualization of the Needle During Ultrasound Procedures
Author(s):

Ki Jinn Chin

DOI:
10.1093/med/9780199986071.003.0094
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date: 29 November 2020

Safe and successful ultrasound-guided interventional procedures depend on the ability to visualize both anatomical structures of interest and the advancing needle. This chapter describes various strategies for optimizing needle visualization and tip localization during freehand guidance of a needle to a tissue target using ultrasound. Challenges to needle visualization include the poor echogenicity of standard needles at insertion angles steeper than 30–45 degrees to the horizontal, the difficulty of aligning the needle with the ultrasound beam, and manipulation in three dimensions based on two-dimensional visual information. Attention to ergonomics improves probe and needle control and facilitates alignment. Needle echogenicity can be improved by using a shallower angle, where possible, and echogenic needle technology. Hand movements of probe and needle should be kept small and controlled. Indirect cues of needle tip location are also extremely useful and should be utilized routinely.

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