Regional anesthesia and pain medicine
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Reg Anesth Pain Med · Dec 2024
Real time continuous monitoring of injection pressure at the needle tip is better than ultrasound in early detecting intraneural injection.
During peripheral nerve blocks, inadvertent intraneural injection is not infrequent. Recently, with sonographic nerve swelling, it has been shown that intraneural injection can be detected as early as 0.4 mL. A new method based on injection pressure monitoring at the needle tip, the real pressure in the tissues, is compared with sonographic performance in early detection of intraneural injection. ⋯ Pressure monitoring at the needle tip consistently showed a pressure rise from the onset of injection and proved to be a more sensitive and earlier indicator of intraneural injection than sonographic nerve swelling.