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Throat swab collection site

Foam swabs, Nasopharyngeal swab, oropharyngeal swab, throat swab
  • Specifications

Throat swabs include oropharyngeal swabs and nasopharyngeal swabs. Nasopharyngeal swabs are also called nasal swabs and nasal swabs. However, oropharyngeal swabs and oral swabs are not the same. Don’t get confused.

Oropharyngeal swab

The collection site of the oropharyngeal swab should be the pharynx and tonsils, then the basic steps of the oropharyngeal swab collection are:

1. The examinee’s head is tilted back, the mouth is wide open, and the secretions on the surface of the nasal cavity are removed.

2. The sampler uses a tongue depressor to fix the tongue, cross the base of the tongue with a Dacron or calcium alginate test paper, and wipe the back wall of the pharynx and the side wall of the tonsil crypt for 3-5 times to collect mucosal cells.

3. Take out the swab gently to avoid touching the tongue, uvula, oral mucosa and saliva.

4. Then insert the swab back into the sampling device or suitable transfer device.


1. When collecting oropharyngeal swabs, it should be noted that drinking water before the test will dilute the virus attached to the pharynx, especially drinking hot water will inhibit the activity of the virus. In order to improve the accuracy of nucleic acid detection of throat swabs, the subject should not drink water 15-30 minutes before the test to ensure the high accuracy of nucleic acid detection of throat swabs.

2. Patients with well-exposed throats are not recommended to have long “ah” to reduce the risk of exposure of the sampler.

3. To prevent vomiting, avoid eating for two hours before collecting throat swabs.

Nasopharyngeal swab

1. The subject’s head is tilted back (about 70°) and stays still;

2. Use a swab to estimate the distance between the root of the ear and the nostril;

3. Insert from the nostril straight to the face, and the deepened simple septum should be at least half the length of the earlobe to the tip of the nose. After encountering resistance, you should reach the nasopharynx, stay for a few seconds to collect secretions (generally 15~30s), and rotate the swab 3~5 times;

4. Rotate gently to take out the swab, and put the swab head into the sampling tube containing the virus preservation solution or the cell preservation solution containing RNase inhibitor.

5. Break off the sterile swab rod at the top, discard the tail, screw the tube cap tightly and close it with a parafilm.


1. Please do not take antibiotics a few days before the nasal swab.

2. Do not rinse your mouth with disinfectant or smear the local lesion a few hours before the nasal swab.

3. You can’t eat, smoke, or drink a few hours before the nasal swab.

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