This study is a non-blinded randomized controlled trial comparing the use of a preoperative
"mini" block plus postoperative local infiltration of Exparel (liposomal form of bupivacaine)
versus a partial single shot nerve block in subjects undergoing primary reverse or total
shoulder arthroplasty to see which is more effective in controlling surgery related pain. To
do so, we will utilize the Visual Analog Scale (VAS) to measure pain intensity. Opioid
consumption will be recorded on a Pain Monitoring Sheet.