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Please use this identifier to cite or link to this item: https://hdl.handle.net/11055/868
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dc.contributor.authorChan MTVen_US
dc.contributor.authorChow BKen_US
dc.contributor.authorLo Ten_US
dc.contributor.authorKo FWen_US
dc.contributor.authorNg SSen_US
dc.contributor.authorGin Ten_US
dc.contributor.authorHui DSen_US
dc.date2018-01-09-
dc.date.accessioned2019-08-05T05:32:44Z-
dc.date.available2019-08-05T05:32:44Z-
dc.identifier.citation8(1):198en_US
dc.identifier.urihttp://hdl.handle.net/11055/868-
dc.description.abstractMask ventilation and coughing during oro-tracheal suctioning produce aerosols that enhance nosocomial transmission of respiratory infections. We examined the extent of exhaled air dispersion from a human-patient-simulator during mask ventilation by different groups of healthcare workers and coughing bouts. The simulator was programmed to mimic varying severity of lung injury. Exhaled airflow was marked with tiny smoke particles, and highlighted by laser light-sheet. We determined the normalized exhaled air concentration in the leakage jet plume from the light scattered by smoke particles. Smoke concentration ≥20% was considered as significant exposure. Exhaled air leaked from mask-face interface in the transverse plane was most severe (267 ± 44 mm) with Ambu silicone resuscitator performed by nurses. Dispersion was however similar among anesthesiologists/intensivists, respiratory physicians and medical students using Ambu or Laerdal silicone resuscitator, p = 0.974. The largest dispersion was 860 ± 93 mm during normal coughing effort without tracheal intubation and decreased with worsening coughing efforts. Oro-tracheal suctioning reduced dispersion significantly, p < 0.001, and was more effective when applied continuously. Skills to ensure good fit during mask ventilation are important in preventing air leakage through the mask-face interface. Continuous oro-tracheal suctioning minimized exhaled air dispersion during coughing bouts when performing aerosol-generating procedures.en_US
dc.subjectRespiratory Tract Infections/prevention & controlen_US
dc.subjectRespiratory Tract Infections/etiologyen_US
dc.subjectRespiration, Artificial/methodsen_US
dc.subjectRespiratory Tract Infections/transmission*en_US
dc.subjectSputum/microbiologyen_US
dc.subjectSuction/methodsen_US
dc.titleExhaled air dispersion during bag-mask ventilation and sputum suctioning - Implications for infection control.en_US
dc.typeJournal Articleen_US
dc.type.contentTexten_US
dc.identifier.journaltitleScientific Reportsen_US
dc.identifier.doi10.1038/s41598-017-18614-1en_US
dc.description.affiliatesThe Chinese University of Hong Kongen_US
dc.description.pubmedurihttps://www.ncbi.nlm.nih.gov/pubmed/29317750en_US
dc.type.studyortrialStudyen_US
dc.identifier.studynameRe-designing ventilation system for the hospital isolation ward to reduce nosocomial infectionen_US
dc.ispartof.anzcaresearchfoundationYesen_US
item.fulltextNo Fulltext-
item.grantfulltextnone-
item.cerifentitytypePublications-
item.openairetypeJournal Article-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
Appears in Collections:Scholarly and Clinical
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