Human subject testing of leakage in a loose-fitting PAPR.
Leakage from loose-fitting PAPRs (powered air-purifying respirators) can compromise the safety of wearers. The Martindale Centurion MAX multifunction PAPR is a loose-fitting PAPR that also incorporates head, eye, and ear protection. This respirator is used in mines where coal dust usually is control...
| Publicado en: | Journal of Occupational & Environmental Hygiene Vol. 5; no. 5; pp. 325 - 330 |
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| Autores principales: | , , , |
| Formato: | research Journal Article |
| Publicado: |
Taylor & Francis Ltd
May2008
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105905645&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105905645 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: May2008 vid: 5 iid: 5 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 105905645 105905645 2009879670 10.1080/15459620801996819 NLM18348078 105905645 ppf: 325 ppct: 5 formats: fmt: @attributes: type: P tig: atl: Human subject testing of leakage in a loose-fitting PAPR. aug: au: Johnson AT Koh FC Jamshidi S Rehak TE affil: Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, USA. artjohns@umd.edu sug: subj: Air Pollutants, Occupational Analysis Occupational Exposure Analysis Respiratory Protective Devices Standards Adult Aerosols Analysis Air Equipment Design Equipment Failure Respiration Videorecording Human Adult: 19-44 years ab: Leakage from loose-fitting PAPRs (powered air-purifying respirators) can compromise the safety of wearers. The Martindale Centurion MAX multifunction PAPR is a loose-fitting PAPR that also incorporates head, eye, and ear protection. This respirator is used in mines where coal dust usually is controlled by ventilation systems. Should the respirator be depended on for significant respiratory protection? Ten human volunteers were asked to wear the Centurion MAX inside a fog-filled chamber. Their inhalation flow rates were measured with small pitot-tube flowmeters held inside their mouths. They were video imaged while they breathed deeply, and the points at which the fog reached their mouths were determined. Results showed that an average of 1.1 L could be inhaled before contaminated air reached the mouth. As long as the blower purges contamination from inside the face piece during exhalation, the 1.1 L acts as a buffer against contaminants leaked due to overbreathing of blower flow rate. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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