Regional anesthesia and pain medicine
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Reg Anesth Pain Med · Aug 2022
Ultrasound is better than injection pressure monitoring detecting the low-volume intraneural injection.
Inadvertent intraneural injection is not infrequent during peripheral nerve blocks. For this reason, injection pressure monitoring has been suggested as a safeguard method that warns the clinician of a potentially hazardous needle tip location. However, doubts remain whether it is superior to the sonographic nerve swelling in terms of earlier detection of the intraneural injection. ⋯ Ultrasound is a more sensitive and earlier indicator of the low-volume intraneural injection than injection pressure monitoring.