Published in:
01-08-2019 | Ultrasound | Editorial
Fascial plane blocks: anatomical structures that affect the spread of local anesthetic
Author:
Kunihisa Hotta
Published in:
Journal of Anesthesia
|
Issue 4/2019
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Excerpt
The endpoint of a peripheral nerve block procedure is the deposition of local anesthetic around a peripheral nerve, causing a nerve conduction blockade. When performing ultrasound-guided sciatic nerve block, the needle is closely adjusted to the sciatic nerve using the ultrasound image, and then the local anesthetic is administered. The low echo of the local anesthetic surrounds the high echo of the sciatic nerve, and this image is called the “donut sign.” This endpoint of the ultrasound-guided procedure appears to be more reasonable to anesthesiologists compared with paresthesia and motor response by nerve stimulation. …