COVID-19's nucleic acid detection is to detect and screen the confirmed cases, suspected cases and asymptomatic infected persons in COVID-19 by laboratory methods, so as to achieve "early detection, early reporting, early isolation and early treatment" and quickly cut off the transmission route of the virus.
Before the test: try to avoid eating 2 hours before the nucleic acid test to avoid vomiting; Do not drink water or drink, smoke, drink or chew gum 30 minutes before sampling; During physical examination, you should reduce swallowing action and don't clear your throat (expectoration, spitting). Before collecting nasopharyngeal swab, the examinee should inform the collector whether there is any relevant past medical history or related matters.
For example, the history of nasal surgery, curved nasal septum, blood diseases, throat diseases, or taking anticoagulants and other related risk factors; Testers need to wear masks correctly, take them off before testing, put them on immediately after testing, and prepare spare masks after pollution for easy replacement at any time. Keep a distance of "one meter" during the waiting.
undergo inspection
When collecting oropharyngeal swabs, the examinee leans back and opens his mouth to make an "ah" sound, which helps to expose his throat, but there will be symptoms such as irritating dry cough, nausea and vomiting in the process, and the examinee can cooperate with the collector to relax and take a deep breath as much as possible; There may be an itchy nose during the collection process, which stimulates sneezing. You can immediately cover it with paper towels (prepared in advance) or elbows.
The above contents refer to:
Baidu encyclopedia-nucleic acid detection method