Vakharia RM, Ehiorobo JO, Sodhi N, et al. - From a nationwide database, researchers identified patients undergoing primary TKA who had an ED visit within 90 days after their index procedure in order to compare patients who did and did not have an ED visit regarding their demographics as well as to determine leading reasons and risk factors for ED visits (prearthroplasty/postarthroplasty). The database yielded data of a total of 1,364,655 patients who did (n = 5,689) and did not have (n = 1,358,966) an ED visit. Differences with respect to age and mean Elixhauser Comorbidity Index scores (9 vs 6) were observed between patients who did and did not have ED visits. The most common reason for ED visits was musculoskeletal etiologies. Hypertension was reported to be the greatest contributor to ED visits prearthroplasty and postarthroplasty. Peripheral vascular disease, coagulopathy, and rheumatoid arthritis were the comorbid conditions linked with ED visits postarthroplasty.