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Cross-section cuts after porcine cadaveric dissection and removal of the intrathoracic viscera.
Notes: (A) High-volume group, red arrows – the injectate spreads from the retrolaminar to the PV space; green arrow – the injectate spreads anterior to the vertebral body. (B) Low-volume group – the injectate was observed between the vertebral laminae and the paraspinal muscles (black arrows). No spread into the paravertebral space was observed.
Abbreviation: PV, paravertebral.
