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Updated: Nov 11, 2025

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic
Published on: November 7, 2020
Correctly performed nasal swabs
Konstantin Zedtwitz-Liebenstein1
1Head Office of Vienna Hospital Association, Thomas Klestil Platz 7, 1030, Vienna, Austria. konstantin.zedtwitz-liebenstein@gesundheitsverbund.at.
Improper COVID-19 nasal swab technique is common, with only 44% of online videos demonstrating correct procedures. This leads to inaccurate false-negative tests and potential patient injury.
Area of Science:
- Medical Procedures
- Infectious Disease Management
- Patient Safety
Background:
- Rising coronavirus disease (COVID-19) cases led to increased nasopharyngeal specimen collection.
- Non-professionals and healthcare workers were tasked with performing viral swabs, increasing risks.
- Reports of basal skull perforation and cerebrospinal fluid fistula emerged due to incorrect swabbing techniques.
Purpose of the Study:
- To highlight the risks associated with incorrect nasopharyngeal swabbing techniques.
- To address the lack of published data on the health endangerment from improper COVID-19 testing procedures.
- To advocate for accurate media reporting on correct nasal swab performance.
Main Methods:
- A literature search was conducted to review existing studies and reports.
- Analysis of publicly available educational resources, specifically YouTube videos, was performed.
Main Results:
- Only 44% of YouTube videos demonstrated correct nasal swab technique.
- Incorrect swabbing methods resulted in inaccurate biological sampling, leading to false-negative COVID-19 test results.
- Potential for patient injury due to improper technique was identified.
Conclusions:
- Despite professional society reports, a publication gap exists regarding the health risks of improper nasal swabbing.
- There is a critical need for accurate media and public information on correct nasal swab procedures.
- Improving technique can reduce false-negative COVID-19 tests and prevent patient harm.
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