Local anesthetic spread into the paravertebral space with two types of quadratus lumborum blocks: a crossover volunteer study.
Takahiro TamuraShuichi YokotaShigeki ItoYasuyuki ShibataKimitoshi NishiwakiPublished in: Journal of anesthesia (2018)
LA administered by the QLB2 spreads into the PVS of T10-T12, resulting in lower and lateral abdominal sensory loss. In contrast, LA administered by the QLBi does not spread into the PVS and results in only lateral abdominal sensory loss.