Racial Disparities in the Use of Peripheral Nerve Blocks for Postoperative Analgesia After Total Mastectomy: A Retrospective Cohort Study.

Background: Peripheral nerve blocks (PNBs) are used to provide postoperative analgesia after total mastectomy. PNBs improve patient satisfaction and decrease postoperative opioid use, nausea, and vomiting. Few studies have examined whether there is racial-ethnic disparity in the use of PNBs for patients having total mastectomy.