Mean plasma bupivacaine concentrations following pectoral nerve blocks (PECS II).

2021 
Pectoral nerve blocks (PECBs) provide analgesia after breast surgery.[1–3][1] Plasma concentration levels of bupivacaine (PCLBs) following fascial plane injections can exceed the threshold for local anesthetic systemic toxicity (LAST, mean venous level of 2.1 µg/mL), as described following
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