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The erector spinae plane block (ESPB), first described in 2016, offers the promise of becoming a safe, less invasive, and technically less demanding alternative to conventional thoracic regional anesthetic techniques including thoracic epidurals and traditional paravertebral blocks. Clinical and cadaveric studies suggest that ESPB acts on the ventral rami of spinal nerves in the paravertebral space via penetration of the intertransverse connection tissues and moreover achieves visceral analgesia via the rami communicantes and sympathetic chain.

The block has garnered considerable appeal related to an inherently lower risk of neurovascular and pleural injury, low risk of local anesthetic systemic toxicity, and relative technical simplicity in comparison with epidural or paravertebral blockade. It has been utilized in the …