2022 Epidemic prevention concerns 丨 What are the factors that affect the sampling of nucleic acid detection pharynx?Authoritative experts answered

Xinhua News Agency, Beijing, June 14th (Reporter Li Heng) Nucleic acid testing is a key role in implementing the "four morning" and playing a key role in the prevention and control of the epidemic. How can nucleic acid sampling as an important part of nucleic acid testing? How to ensure the standardization of nucleic acid sampling? What are the factors that affect the sampling of the pharynx? Experts on the joint control mechanism of the State Council made an authoritative answer.

"Nucleic acid detection is a mature, international -universal laboratory diagnosis method." Li Jinming, deputy director of the Clinical Examination Center of the National Health Commission, said that the sensitivity of nucleic acid detection methods is high, and the positive results of nucleic acid detection can be equivalent to the result of pathogen culture. Diagnosis of "gold standards" of new coronal virus infection.

Sample is an important part of nucleic acid detection. The Comprehensive Group of the State Council ’s joint prevention and control mechanism has recently issued the“ Notice on Further Strengthening the Quality Management of Nuclear Virus Nucleic acid Samples ”, which requires further improvement of the normative and accuracy of nucleic acid sampling.

The notice requires that the health and health administrative departments of various places should make training videos and organize practical training to make the sampling personally master the commonly used collection methods such as oral pharyngeal swabs, nasopharyngeal swab Infection control measures. Do not replace practical training through video training. All localities should effectively strengthen the quality control of nucleic acid sampling, and ensure that the operation and behavior of sampling personnel in accordance with the principles of "do not train and do not have the job, the training is not qualified and not qualified".

Li Ang, deputy director of the Beijing Municipal Health and Health Commission, introduced that the factors that affect the sampling of the pharynx include the depth of the pharynx collection, the time of contact with the mucosa, the strength of the sampling, the height gap between the sampling and the sampling person, and the collector The degree of cooperation during the collection process is five aspects.

"During the process of collecting the pharynx, the collector needs the head to be slightly tilted, and the mouth should be slightly open, revealing the pharynx tonsils on both sides. When participating in nucleic acid testing, the public should actively cooperate with the sampling personnel, and according to the on -site requirements, standardize the sampling and cooperation action to ensure the sampling effect.

"The sample swab is a medical device. The most basic criterion is non -toxic and harmless." Li Jinming introduced that the sample swab is not a cotton swab, and its material is polyester or nylon fiber. When making a sample swab, it is a million tiny fiber vertically and uniformly covered on the end of the wound handle. The sampling swab is to take the cells in the posture of the throat in the mouth, and then put the sampling swab in the sampling tube, because the polyester or nylon fiber is used, it is easy to get rid of the storage liquid. Test.

Li Jinming said that there will be some stimuli during the sampling process, and the individual differences will be large. When the sampling is usually opened, some people have the soft palate to close the roots of the tongue. If the sample person must ensure the sampling quality, you will explore it and find the back of the pharyngeal wall and the tonsils to cause stimulation. Some people have strong stimulation reactions and symptoms such as vomiting and cough, but after the sampling is completed, this discomfort will be relieved.

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