Feng Feng

Preoperative versus Postoperative Paravertebral Block on Postoperative Opioid Consumption in Patients Undergoing Metabolic and Bariatric Surgery: A Retrospective Cohort Study

Introduction The optimal timing of paravertebral block (PVB) for metabolic and bariatric surgery (MBS) remains uncertain. Drawing on the concept of preemptive analgesia—which suggests that blocking nociceptive signals before surgical stimulus may limit central sensitization—we designed this study to test whether a preo...