Abstract

The collection capacity of common nasopharyngeal swabs and irregularities of medical personnel limit the accuracy of PCR testing. This study describes a newly designed 3D-printed swab that is combined with a 3D-printed cover to prevent the extraction of undesired nasal secretions. This swab improved the accuracy of PCR test results. The results of a series of experiments showed that, because of the mucus extraction effect, 3D-printed swabs can replace ordinary cotton swabs. The crisis of the worldwide medical supply shortage can be ameliorated to a certain extent by applying 3D printing technology.

Highlights

  • The COVID-19 pandemic has resulted in a global shortage of nasopharyngeal swabs needed for sample collection

  • Swabs must exhibit good mechanical behavior; they are expected to maintain an undeformed shape in compression tests and a good toughness to resist plastic deformation in buckling tests

  • The results presented here confirm the findings of Callahan et al [8] that 3D-printed swabs are a good alternative to normal cotton swabs

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Summary

Introduction

The COVID-19 pandemic has resulted in a global shortage of nasopharyngeal swabs needed for sample collection. This shortage may have an adverse effect by delaying testing for COVID-19 and other respiratory diseases [1, 2]. When obtaining samples for PCR tests, healthcare personnel may be afraid of being infected; this can lead to mental stress and performance irregularities. This factor, coupled with a lack of a standard swabbing practice, may contribute to the high false-negative rate

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