Evidence map›Paper›PMID 21197329›Full record

ArticleJournal of multidisciplinary healthcare2008

Transmission of communicable respiratory infections and facemasks.

Yi Li, Yue Ping Guo, Kwok Ching Thomas Wong, Wai Yee Joanne Chung, Mayur Danny Indulal Gohel, Hang Mei Polly Leung

Open access · goldAbstract read
In one paragraph

Article in Journal of multidisciplinary healthcare, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 2 pooled it
1.0field-weighted citation impact, top 21% of its field
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

15 citing papers in PubMed, 2 syntheses or guidelines pooled it, 32 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. The effect of N95 respirators on vital parameters, PETCOIrish journal of medical science · 2023
    Article
  5. Article
  6. Article
  7. Recent advances in facemask devices forTrends in analytical chemistry : TRAC · 2022
    Review
  8. The Control of Metabolic COInternational journal of environmental research and public health · 2022
    Article
  9. Article
  10. A guideline to limit indoor airborne transmission of COVID-19.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  11. Review
  12. Face masks: benefits and risks during the COVID-19 crisis.European journal of medical research · 2020
    Review
  13. Article
  14. Article
  15. Article
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

6 authors at 1 institution in 1 country.

Yi LiInstitute of Textiles and Clothing.
Yue Ping Guo
Kwok Ching Thomas Wong
Wai Yee Joanne Chung
Mayur Danny Indulal Gohel
Hang Mei Polly Leung
Hong Kong Polytechnic University · HK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRespiratory protection efficiency of facemasks is critically important in the battle against communicable respiratory infections such as influenza and severe acute respiratory syndrome (SARS). We studied the spatial distributions of simulated virus-laden respiratory droplets when human subjects wore facemasks and were exposed to regulatory viral droplets by conducting in vivo experiments in facemask use.

methodsTransmission pathway of aerosols of Fluorescein-KCl solution through facemasks and protective efficiency of facemasks were examined by using normal surgical facemasks and two facemasks with exhaust valves (Facemask A) and exhaust holes (Facemask B) covered with the same surgical filters situated at the back of the facemasks. Fluorescein-KCl solution was sprayed onto the faces of participants wearing the facemasks and performing intermittent exercises on a treadmill in a climatic chamber.

resultsExperimental results showed that when droplets spread onto a person face-to-face over short distances, 92.3% to 99.5% of droplets were blocked by the front surface of the facemask, whereas only 0.5% to 7.7% of droplets reached the back of the facemask. Both facemasks A and B had near or over 99% protection efficiency, compared with that of 95.5% to 97% of surgical facemasks. Using the same filters as normal surgical masks, facemasks A and B provided more effective respiratory protection against communicable respiratory infections such as influenza and SARS by the location of the breathing pathway to the back of the facemasks.

conclusionsSeparating the breathing pathway from the virus-contaminated area in facemasks can provide more effective protection against communicable respiratory infections such as influenza and SARS.

Indexed as

communicable respiratory infectionsfacemasks with valves/holesprotective efficiencyseparating the breathing pathwaythe virus-contaminated areatransmission

Identifiers

PMID21197329
PMCPMC3004550
OpenAlexW2075475794

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.