Anatomical evaluation of the extent of spread in the erector spinae plane block: a cadaveric study.
Adriana AponteXavi Sala-BlanchAlberto Prats-GalinoJoseph MasdeuLuis A MorenoLuc A SermeusPublished in: Canadian journal of anaesthesia = Journal canadien d'anesthesie (2019)
The results suggest that the ESP block reaches a wide range of the posterior rami of spinal nerves without diffusion into the paravertebral space or involvement of the anterior rami.