People can be taught to do their own nasal swabs for accurate COVID-19 testing, limiting the exposure of health care workers and the use of protective equipment, according to Stanford researchers.
Test samples collected by people who swabbed their own nasal passages yielded results for the COVID-19 virus that were as accurate as samples collected by a health care worker, according to a small study by researchers at the Stanford University School of Medicine.
The 30 study participants previously had tested positive for COVID-19.
The study was published June 12 in the Journal of the American Medical Association.
Allowing people who suspect they may have COVID-19 to collect their own sample has many advantages. Sample-collection kits could be widely distributed, allowing more people to be tested. Those using the kit wouldn’t have to travel to a testing site, negating the risk of transmission to health care workers and others with whom they interact in transit. Self-collection would also conserve supplies of personal protective equipment used by health care workers.
“There is an urgent need to increase our testing capacity to slow the overall spread of the virus,” said Yvonne Maldonado, MD, professor of pediatric infectious diseases and of health research and policy. “A sample collection procedure that can safely and easily be performed by the patient in their own car or at home could reduce the exposure of health care workers and also allow many more people to submit samples for testing.”
Maldonado is the senior author of the study, which was conducted in collaboration with Andra L. Blomkalns, MD, the Redlich Family Professor and professor and chair of emergency medicine, and Prasanthi Govindarajan, MD, associate professor of emergency medicine; senior research data analyst Jonathan Altamirano is the lead author.
The study participants had tested positive in March at Stanford Health Care for the virus that causes COVID-19. Maldonado and her team contacted each of them by phone at home and provided them with written instructions and a short video about how to collect a nasal swab.