Carbon Dioxide Washout of an Emergency Breathing System Mask Modified for Use in the Advanced Seal Delivery System (ASDS) Trainer

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Carbon Dioxide Washout of an Emergency Breathing System Mask Modified for Use in the Advanced Seal Delivery System (ASDS) Trainer

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dc.contributor NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL en_US
dc.contributor.author Carlson, NA en_US
dc.contributor.author Warkander, DE en_US
dc.date.accessioned 2006-09-02T14:12:12Z
dc.date.available 2006-09-02T14:12:12Z
dc.date.issued 2005 en_US
dc.identifier.govdoc ADA442819 en_US
dc.identifier.govdoc NEDU-TR-05-13 en_US
dc.identifier.govdoc XB-NAVSPECWARCO en_US
dc.identifier.other ASDS(ADVANCED SEAL DELIVERY SYSTEM) en_US
dc.identifier.other EBS(EMERGENCY BREATHING SYSTEM) en_US
dc.identifier.uri http://archive.rubicon-foundation.org/3480
dc.description Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center (http://www.dtic.mil/) is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested. en_US
dc.description.abstract A modified emergency Breathing System full face mask was evaluated for use in the Advanced SEAL Delivery System trainer. The mask contained an oral-nasal cup and two spiral-wound plastic hoses on its inhalation and exhalation openings. Each hose was six feet long with an inside diameter of 1.25 inches and had six rectangular slots cut through the hose wall. The slots were approximately eight inches from one end of each hose. Testing was conducted in an unpressurized hyperbaric chamber that was well ventilated with air. Carbon dioxide (CO2) washout volume - averaged inspired CO2 - was calculated at a respiratory minute ventilation of 22.5 liters per minute (1.min(exp -1). The mask was ventilated with a mechanical breathing simulator. One hundred per cent CO2 was injected at 0.9 1.min(exp -2) into the breathing loop. Mean CO2 washout was determined for two configurations: normal, with both hoses positioned so that the slotted ends are near the mask; and reversed exhaust, with inhalation hose positioned with its slots near the mask and exhalation hose positioned with the slots away from the mask. By our normalizing for the actual end-tidal CO2 level, the volume-averaged CO2 in the normal configuration was 0.71percent and 0.75percent with the exhaust reversed. Carbon dioxide washout of the modified emergency breathing system mask with exhaust hose in either configuration is acceptable for use in the ASDS trainer. en_US
dc.format.extent 666059 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center (http://www.dtic.mil/) is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested. en_US
dc.subject BREATHING MASKS en_US
dc.subject SLOTS en_US
dc.subject CARBON DIOXIDE en_US
dc.subject RESPIRATION en_US
dc.subject HOSES en_US
dc.subject EXHALATION en_US
dc.subject BREATHING APPARATUS en_US
dc.subject INHALATION en_US
dc.title Carbon Dioxide Washout of an Emergency Breathing System Mask Modified for Use in the Advanced Seal Delivery System (ASDS) Trainer en_US

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