“…Unfortunately, many complications after TKA may be associated with pain management strategies themselves. Opioid analgesics, including intravenous, patient-controlled, and oral, have been a standard modality for postoperative pain management but are also associated with increased risk of nausea, pruritus, vomiting, respiratory depression, prolonged ileus, and cognitive dysfunction [18,64,85]. Regional pain control techniques such as femoral nerve blockade may limit exposure to opioid-related adverse events but may lead to other complications such as quadriceps weakness, neuropathy, and postoperative falls [8,75].…”