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Article: Exhaled air dispersion distances during noninvasive ventilation via different respironics face masks

TitleExhaled air dispersion distances during noninvasive ventilation via different respironics face masks
Authors
Issue Date2009
PublisherAmerican College of Chest Physicians. The Journal's web site is located at http://www.chestjournal.org
Citation
Chest, 2009, v. 136 n. 4, p. 998-1005 How to Cite?
AbstractBackground: As part of our influenza pandemic preparedness, we studied the exhaled air dispersion distances and directions through two different face masks (Respironics; Murrysville, PA) attached to a human-patient simulator (HPS) during noninvasive positive-pressure ventilation (NPPV) in an isolation room with pressure of -5 Pa. Methods: The HPS was positioned at 45° on the bed and programmed to mimic mild lung injury (oxygen consumption, 300 mL/min; lung compliance, 35 mL/cm H 2O). Airflow was marked with intrapulmonary smoke for visualization. Inspiratory positive airway pressure (IPAP) started at 10 cm H 2O and gradually increased to 18 cm H 2O, whereas expiratory pressure was maintained at 4 cm H 2O. A leakage jet plume was revealed by a laser light sheet, and images were captured by high definition video. Normalized exhaled air concentration in the plume was estimated from the light scattered by the smoke particles. Findings: As IPAP increased from 10 to 18 cm H 2O, the exhaled air of a low normalized concentration through the ComfortFull 2 mask (Respironics) increased from 0.65 to 0.85 m at a direction perpendicular to the head of the HPS along the median sagittal plane. When the IPAP of 10 cm H 2O was applied via the Image 3 mask (Respironics) connected to the whisper swivel, the exhaled air dispersed to 0.95 m toward the end of the bed along the median sagittal plane, whereas higher IPAP resulted in wider spread of a higher concentration of smoke. Conclusions: Substantial exposure to exhaled air occurs within a 1-m region, from patients receiving NPPV via the ComfortFull 2 mask and the Image 3 mask, with more diffuse leakage from the latter, especially at higher IPAP. © 2009 American College of Chest Physicians.
Persistent Identifierhttp://hdl.handle.net/10722/179163
ISSN
2015 Impact Factor: 5.94
2015 SCImago Journal Rankings: 3.176
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHui, DSen_US
dc.contributor.authorChow, BKen_US
dc.contributor.authorNg, SSen_US
dc.contributor.authorChu, LCYen_US
dc.contributor.authorHall, SDen_US
dc.contributor.authorGin, Ten_US
dc.contributor.authorSung, JJYen_US
dc.contributor.authorChan, MTVen_US
dc.date.accessioned2012-12-19T09:52:28Z-
dc.date.available2012-12-19T09:52:28Z-
dc.date.issued2009en_US
dc.identifier.citationChest, 2009, v. 136 n. 4, p. 998-1005en_US
dc.identifier.issn0012-3692en_US
dc.identifier.urihttp://hdl.handle.net/10722/179163-
dc.description.abstractBackground: As part of our influenza pandemic preparedness, we studied the exhaled air dispersion distances and directions through two different face masks (Respironics; Murrysville, PA) attached to a human-patient simulator (HPS) during noninvasive positive-pressure ventilation (NPPV) in an isolation room with pressure of -5 Pa. Methods: The HPS was positioned at 45° on the bed and programmed to mimic mild lung injury (oxygen consumption, 300 mL/min; lung compliance, 35 mL/cm H 2O). Airflow was marked with intrapulmonary smoke for visualization. Inspiratory positive airway pressure (IPAP) started at 10 cm H 2O and gradually increased to 18 cm H 2O, whereas expiratory pressure was maintained at 4 cm H 2O. A leakage jet plume was revealed by a laser light sheet, and images were captured by high definition video. Normalized exhaled air concentration in the plume was estimated from the light scattered by the smoke particles. Findings: As IPAP increased from 10 to 18 cm H 2O, the exhaled air of a low normalized concentration through the ComfortFull 2 mask (Respironics) increased from 0.65 to 0.85 m at a direction perpendicular to the head of the HPS along the median sagittal plane. When the IPAP of 10 cm H 2O was applied via the Image 3 mask (Respironics) connected to the whisper swivel, the exhaled air dispersed to 0.95 m toward the end of the bed along the median sagittal plane, whereas higher IPAP resulted in wider spread of a higher concentration of smoke. Conclusions: Substantial exposure to exhaled air occurs within a 1-m region, from patients receiving NPPV via the ComfortFull 2 mask and the Image 3 mask, with more diffuse leakage from the latter, especially at higher IPAP. © 2009 American College of Chest Physicians.en_US
dc.languageengen_US
dc.publisherAmerican College of Chest Physicians. The Journal's web site is located at http://www.chestjournal.orgen_US
dc.relation.ispartofChesten_US
dc.subject.meshAiren_US
dc.subject.meshAir Pollution, Indooren_US
dc.subject.meshEquipment Designen_US
dc.subject.meshExhalationen_US
dc.subject.meshHumansen_US
dc.subject.meshInfluenza, Human - Transmissionen_US
dc.subject.meshMasksen_US
dc.subject.meshPatient Simulationen_US
dc.titleExhaled air dispersion distances during noninvasive ventilation via different respironics face masksen_US
dc.typeArticleen_US
dc.identifier.emailChow, BK: bkcc@hku.hken_US
dc.identifier.authorityChow, BK=rp00681en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1378/chest.09-0434en_US
dc.identifier.pmid19411297-
dc.identifier.scopuseid_2-s2.0-70349973475en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70349973475&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume136en_US
dc.identifier.issue4en_US
dc.identifier.spage998en_US
dc.identifier.epage1005en_US
dc.identifier.isiWOS:000270855500014-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridHui, DS=7101862411en_US
dc.identifier.scopusauthoridChow, BK=7102826193en_US
dc.identifier.scopusauthoridNg, SS=21233825300en_US
dc.identifier.scopusauthoridChu, LCY=26636320200en_US
dc.identifier.scopusauthoridHall, SD=8640292200en_US
dc.identifier.scopusauthoridGin, T=7006156764en_US
dc.identifier.scopusauthoridSung, JJY=35405352400en_US
dc.identifier.scopusauthoridChan, MTV=8082621500en_US

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