TY - JOUR T1 - False-positive Xpert<sup>®</sup> Xpress SARS-CoV-2 assay in an emergency room and trauma center JF - Saudi Medical Journal JO - Saudi Med J SP - 965 LP - 970 DO - 10.15537/smj.2022.43.8.20220317 VL - 43 IS - 8 AU - Hyerim Kim AU - Soeun Jeon AU - Sun Hack Lee AU - Hyun-Su Ri AU - Hyeon-Jeong Lee AU - Jeong-Min Hong AU - Sung In Paek Y1 - 2022/08/01 UR - http://smj.org.sa/content/43/8/965.abstract N2 - Objectives: To review reports false-positive Xpert results in an emergency room and trauma center.Methods: Patients’ data with false-positive Xpert results from November 2020 to February 2022 at Pusan National University Hospital, Busan, Republic of Korea, were extracted from the electronic medical records.Results: The positive predictive value of Xpert was 40%. Of the 12 patients with false-positive results, 5 (41.7%) were re-positives (such as, patients recovered from coronavirus disease-19 [COVID-19]), and 4 (33.3%) had head or facial trauma. Two out of 4 head or facial trauma cases had documented sample contamination with blood.Conclusion: We found a high incidence of false-positive Xpert results among patients who recovered from COVID-19 and those with head or facial injury. Careful history taking for COVID-19 and physical examination of the sample collection site is essential before Xpert analysis. ER -