Evidence map›Paper›PMID 36631085›Full record

ArticleIndustrial health2023

Measuring the effects of respiratory protective equipment and other protectors in preventing the scattering of vocalization droplets.

Hidenori Higashi, Takako Oyabu, Chikage Nagano, Hiroko Kitamura, Shoko Kawanami, Mitsumasa Saito, Seichi Horie

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Industrial health, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Hidenori HigashiDepartment of Environmental Health Engineering, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan.
Takako OyabuDepartment of Environmental Health Engineering, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan.
Chikage NaganoDepartment of Health Policy and Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan.
Hiroko KitamuraOccupational Health Training Center, University of Occupational and Environmental Health, Japan.
Shoko KawanamiOccupational Health Training Center, University of Occupational and Environmental Health, Japan.
Mitsumasa SaitoDepartment of Microbiology, School of Medicine, University of Occupational and Environmental Health, Japan.
Seichi HorieDepartment of Health Policy and Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study was conducted to quantitatively examine the effects of respiratory protective equipment (respirators) and various other types of protectors in preventing the scattering of vocalization droplets. Each of 12 adult male volunteers was asked to vocalize intermittently for 1 min at a target intensity of approximately 100 dBA in an experimental room adjusted to a humidity of approximately 60-70%. The subjects vocalized while wearing respirators, other types of protectors, or no protectors at all. The droplet concentration in a particle size range of 0.3 to 10 μm was measured under each experimental condition, and the transmitted particle concentration and penetration were calculated. The concentration and penetration of particles transmitted from the respirators were lower than those transmitted from the other protectors examined. The probability of infection reduction through the use of the protectors was estimated from the data obtained on the effectiveness of the protectors in preventing the scattering of droplets. We concluded that there is no need for additional droplet scattering prevention in various work settings when appropriate respirators are used under optimal conditions.

Indexed as

Respiratory Protective DevicesAdultHumansMaleMasksAirborne particulate matterInfectious disease transmissionProtective devicesRespiratory infections/prevention

Identifiers

PMID36631085
PMCPMC10731419

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.