| Message: | The problem of false positives and false negatives in nucleic acid testing has always been a heart disease of experts, and the collection and storage of nucleic acid samples has become the top priority that affects the test results. Many experts have concluded from the experience of practical work that nasopharyngeal swabs The positive rate of 2019-nCoV nucleic acid test is higher than that of oropharyngeal swabs. The positive rate of sputum and alveolar lavage samples collected from lower respiratory tract is higher than that of upper respiratory tract oral and nasopharyngeal swabs. In order to increase the positive rate of detection, it is recommended Collecting specimens from multiple parts of the same patient and combining them for testing, let's take a look at what issues should be paid attention to in the process of specimen collection, transportation, and preservation.
Precautions for oral and throat swab collection
1. Do not sample from the nostrils or tonsils
2. It is not recommended to spray sputum
3. Lower respiratory tract specimens (compared to upper respiratory tract specimens) are more likely to be positive
4. For patients who are suspected of being infected with the new coronavirus, especially those with pneumonia or serious diseases, a single upper respiratory tract specimen cannot rule out the diagnosis. It is recommended to add upper and lower respiratory tract specimens.
In general, the specimens should be sent for inspection and tested in time after collection. If for some reason the specimens cannot be sent for inspection or tested in time after collection, the swabs after sampling should be put into the virus preservation solution. The virus preservation solution is The protective liquid added in the virus sampling tube to protect the virus samples. Desun has developed and produced two models, one is non-inactivated type and the other is inactivated type. Both samples are provided free of charge. Welcome to order advisory! |
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