Using face masks to detect COVID-19 in breath samples

The Efficacy and Feasibility of Face Mask Sampling for Hospitalised Adult Patients and Healthcare Workers With Suspected COVID-19

Observational University of Leicester · NCT04481646

This study tests if wearing special masks that collect breath samples can help diagnose COVID-19 better than the usual nose swab test for hospitalized patients and healthcare workers.

Quick facts

Study typeObservational
Enrollment630 (estimated)
Ages16 Years and up
SexAll
SponsorUniversity of Leicester Academic / other
Locations1 site (Leicester)
Trial IDNCT04481646 on ClinicalTrials.gov

What this trial studies

This study investigates the effectiveness of mask-based sampling for diagnosing COVID-19 by comparing it to the standard nasopharyngeal swab test. Participants, including hospitalized patients and healthcare workers, will wear modified masks that collect breath samples for analysis. The study aims to assess the amount of COVID-19 detected in breath and its implications for public health. Data on demographics and microbiological results will be collected to evaluate the method's utility in a healthcare setting.

Who should consider this trial

Good fit: Ideal candidates include hospitalized patients with suspected COVID-19 and healthcare workers at University Hospitals of Leicester.

Not a fit: Patients requiring oxygen by face mask or those with respiratory failure may not benefit from this study.

Why it matters

Potential benefit: If successful, this method could provide a non-invasive and efficient way to diagnose COVID-19, improving screening processes.

How similar studies have performed: Previous studies have shown the utility of mask-based sampling for other respiratory infections, suggesting potential success for this novel approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Not requiring oxygen by face mask
* Either:

  o Patients admitted to hospital with suspected COVID-19
* Or o Healthcare workers working within University Hospitals of Leicester, including those with and without symptoms suspicious of COVID-19.

Exclusion Criteria:

* Participants requiring oxygen by face mask (i.e., Venturi, non rebreathe)
* Participants with respiratory failure
* Medical history that might, in the opinion of the attending clinician, put the patient at significant risk if he/she were to participate in the study
* Individuals who are unable to provide informed consent for themselves (i.e., individuals who lack capacity).

Where this trial is running

Leicester

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Covid19
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.