A Pilot Study Investigating the nCAP Signal Relief Patch in Subjects Undergoing Primary Hip or Knee Replacement Surgery

nCAP Signal Relief Patch post-operatively applied to the subject's surgical dressing by a trained researcher in the immediate Post Anesthesia Care Unit (PACU)

Subjects will undergo surgery using the approved ERAS anesthetic and post-operative pain management protocols. At Shadyside Hospital, the ERAS Protocol for these subjects involves preoperative meloxicam 15mg PO, gabapentin 300mg PO, acetaminophen 1g PO. Intra-operative, patients receive a spinal block (bupivacaine) and propofol IV sedation. Postoperative pain medication is titrated to the individual patient's level of pain (0-10). 0.2 mg IV hydromorphone can be given for breakthrough pain, oxycodone 5mg PO for moderate pain (4-6) and oxycodone 10 mg PO for severe pain (7-10). Ketorolac 15 mg IV is given Q6H during the hospital stay. Discharge medication may be Norco 5-325mg as prescribed by the surgeon.