Related Experiment Video
Updated: Sep 25, 2025
03:53
Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses
Published on: November 10, 2023
1.4K
SARS-CoV-2 Infection Rates Following Use of Regular Compared With Defective Respirators When Caring for COVID-19
Henrik A Kolstad1,2, Morten Frydenberg1, Kent Jacob Nielsen3
1Department of Occupational Medicine, Danish Ramazzini Centre, Aarhus University Hospital, DK-8200 Aarhus N, Denmark.
Annals of Work Exposures and Health
|April 30, 2022
Summary
Regular respirators offer significant protection against SARS-CoV-2 infection, unlike a defective new brand. This study confirms the protective effect of standard respirators for healthcare workers during the COVID-19 pandemic.
Area of Science:
- Infectious Diseases
- Occupational Health
- Epidemiology
Background:
- Limited evidence exists on respirator effectiveness against SARS-CoV-2 in daily work settings.
- Previous studies show strong protection against SARS-CoV and MERS-CoV.
- This study addresses the gap in evidence for SARS-CoV-2 protection during routine healthcare activities.
Purpose of the Study:
- To assess the protective efficacy of regular respirators against SARS-CoV-2 infection.
- To compare the effectiveness of a standard respirator versus a new, potentially defective brand.
- To evaluate respirator performance in healthcare workers caring for COVID-19 patients.
Main Methods:
- Retrospective cohort study design.
- Involved 463 participants using regular respirators and 168 using a new brand respirator.
- Follow-up occurred from December 2020 to January 2021, tracking daily infections until positive PCR tests for SARS-CoV-2.
Main Results:
- Seven incident SARS-CoV-2 cases in the regular respirator group and eight in the new brand group.
- Daily infection rates were 0.2% for regular respirators and 0.5% for the new brand.
- Incidence rate ratio was 0.4 (95% CI 0.1; 1.0), indicating reduced infection risk with regular respirators.
Conclusions:
- The new brand respirator was considered a sham intervention due to frequent defects.
- This study provides further evidence supporting the protective effect of regular respirators against SARS-CoV-2.
- Standard respirators are crucial for protecting healthcare workers from SARS-CoV-2 exposure.
Related Concept Videos
01:25Tracheostomy Care II: Procedure
502
Tracheostomy care is an essential nursing skill that involves cleaning and maintaining a tracheostomy tube to prevent infection and other complications. Here's a step-by-step guide explaining each procedure with its rationale. Note that disposable gloves are to be worn at all times and changed as often as needed to maintain a sterile work environment, and to protect both patient and healthcare worker.
Step 1: Perform hand hygiene, and put on personal protective equipment: gown, gloves, mask...
Step 1: Perform hand hygiene, and put on personal protective equipment: gown, gloves, mask...
502
01:20Assessment of Ventilation I: Respiratory Rate
1.4K
Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
1.4K
01:25Transmission-based Precautions II: Airborne and Protective Environment
1.5K
Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
1.5K
01:21Acute Respiratory Failure-II
405
Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
405
01:21Acute Respiratory Failure-I
365
Acute respiratory failure is a condition characterized by the inability of the lungs to perform their primary function: gas exchange. This failure leads to insufficient oxygen levels (hypoxemia) in the blood, elevated carbon dioxide levels (hypercapnia), or both, causing critical impairment in organ function.
Definition: It is defined by specific criteria based on blood gas measurements. Hypoxemia happens when the partial pressure of oxygen (PaO2) falls below 60 mmHg. At the same time,...
Definition: It is defined by specific criteria based on blood gas measurements. Hypoxemia happens when the partial pressure of oxygen (PaO2) falls below 60 mmHg. At the same time,...
365
01:30Acute Respiratory Failure-III
360
Hypercapnic respiratory failure, also known as Type 2 or ventilatory respiratory failure, is a severe condition characterized by the body's inability to effectively remove carbon dioxide (CO2) from the bloodstream. It leads to an arterial CO2 pressure (PaCO2) exceeding 45 mmHg and a blood pH above 7.35. This situation indicates that the body's ventilatory demand, or the ventilation needed to maintain normal PaCO2 levels, surpasses its supply or the maximum gas flow achievable without...
360