Which is more accurate, oropharyngeal swab?-Expert Answer

by 人生
January 5, 2022

Recently, there have been sporadic cases of 鼻咽拭子測試 new crowns in many places in China, and various places have adopted nucleic acid analysis and testing and other methods to investigate and investigate cases. In the process of nucleic acid detection, some people have a question. Some nucleic acid detection points are to extract throat swabs from the oral cavity, and some are to extract data from the nasal cavity. What is the difference between the two methods? Which one has higher accuracy? The expert system interpretation problem is coming↓

Wang Guiqiang, Chief Physician of the Department of Infectious Diseases, Peking University First Hospital: Collection of nasopharyngeal cavity swabs including nasopharyngeal and oropharynx. The nasopharyngeal swab is taken from the nasal cavity to the back wall of the pharynx. Oropharyngeal swabs are taken from the mouth to the back of the throat. The difference in flu data between nasopharyngeal swabs and oropharyngeal swabs, including the new crown data, shows that nasopharyngeal swabs are higher than oropharyngeal swabs The detection rate.

Generally speaking, the detection rate of nasopharyngeal cavity cotton swabs is higher

According to experts, whether it is from the nose or the mouth, all swabs are collected from the same part, that is, the back wall of the pharynx. However, the different collection methods directly affect the accuracy of detection. The detection rate of nasopharyngeal swabs is generally higher.

Because it sometimes has nausea and vomiting in the mouth that sticks to the tongue, and the nausea reaction is very strong, it cannot collect the back wall of the pharynx and dry it directly on that part of the tongue, which may affect its detection rate.

Experts also said that although the detection rate of nasopharyngeal swabs is high, we have higher requirements for the technical development level of data collection nurses. If the operation method is not appropriate, it will not only cause discomfort to the person being collected, but also affect the collection effect. .

Infectious diseases Peking University First Hospital chief physician Wang Guiqiang said that if the technology is not in place, it may stick to the nasal cavity, which is very sensitive and the patient may not be able to enter.

According to the expert system, for most people, whether it is a nasal swab or a throat swab when conducting research on nucleic acid testing, it is in line with the epidemic prevention work regulations, but they are for people who suspect a history of close contact and people who have had new coronary pneumonia. , People who are not clear about themselves after multiple oropharyngeal swab results analysis, it is recommended that nasopharyngeal swabs can be tested.