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BackgroundCoronavirus disease 2019 (COVID-19), which is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has triggered a global pandemic. Healthcare workers are placed at an elevated risk of nosocomial cross-infection from clinical exposure. One diagnostic criterion for COVID-19 is a positive result from a real-time reverse transcriptase-polymerase chain reaction (qRT-PCR) assay of pharyngeal swab specimens, which has been a routine procedure for healthcare workers during the outbreak. In the context of a global shortage of personal protective equipment (PPE), we aimed to lower the probability of clinical cross-infection without impacting the results of pharynx sampling through an optimized pharyngeal swab assisted device (OPAD).MethodsTo evaluate the efficacy and feasibility of an OPAD for the detection of SARS-CoV-2, 22 confirmed COVID-19 cases were enrolled in our self-controlled study. The results of two pharyngeal sampling qRT-PCR tests using the OPAD or the traditional method were recorded each. Clinical data including baseline characteristics, laboratory tests, and computed tomography (CT) results were also collected. The procedure duration and levels of pharynx exposure with the OPAD, and the diagnostic consistency between the OPAD and the traditional method for pharyngeal sampling qRT-PCR, were evaluated individually. Additionally, a questionnaire was designed for healthcare workers who had performed the pharyngeal swab to deepen our understanding of their attitude during their service on the frontline.ResultsIn all 44 samplings (22 samples with each method), the qRT-PCR results of 18 pairs (81.82%) were consistent, while 3 (13.64%) were single positive with the OPAD. The positive rate was slightly higher with the OPAD (54.55%, 12/22) than with the traditional method (45.45%, 10/22). Using the OPAD, the average procedure duration of sampling was 30 s (30±13 s). Pharynx exposure was excellent in 21 subjects (95.45%, 21/22), which meant that the operator could acquire the swabs without difficulty.ConclusionsAs the COVID-19 pandemic escalates, our OPAD has identical efficacy compared to the traditional method for pharyngeal swabs, and it can also contribute to protecting the safety of healthcare workers.

Application of an optimized pharyngeal swab-assisted device in pharyngeal sampling for COVID-19 patients