[abstract] DETERMINING THE POTENTIAL OF THE HI-OX80 OPEN CIRCUIT O2 MASK AND THE DAN REMO2 CLOSED CIRCUIT O2 REBREATHER FOR REMOTE DIVING ACCIDENTS

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[abstract] DETERMINING THE POTENTIAL OF THE HI-OX80 OPEN CIRCUIT O2 MASK AND THE DAN REMO2 CLOSED CIRCUIT O2 REBREATHER FOR REMOTE DIVING ACCIDENTS

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Title: [abstract] DETERMINING THE POTENTIAL OF THE HI-OX80 OPEN CIRCUIT O2 MASK AND THE DAN REMO2 CLOSED CIRCUIT O2 REBREATHER FOR REMOTE DIVING ACCIDENTS
Author: Bouak, F; Eaton, DJ
Abstract: BACKGROUND: Normobaric O2 is given as a first aid treatment to diving casualties in remote areas, but available O2 supplies often do not meet therapeutic requirements. Miniature O2 concentrators could eliminate this deficiency; however, their O2 production rate does not meet the needs of traditional O2 masks. Two new low flow masks were compared to determine their compatibility with O2 concentratorMATERIALS AND METHODS: Subjects (10 male, 2 female) breathed O2 at rest through a simple facemask, a VIASYS Hi-Ox80 mask (Hi-Ox), and a DAN REMO2 rebreather (REMO). Testing the simple facemask and the Hi-Ox consisted of four 15-minute breathing periods at either 4, 7, 8, or 9 L[sum]min-1 and the REMO during three 2-hour periods, following the manufacturer's procedure. With all units, breathing periods were separated by 10-minute air-breaks. Measurement included inhaled and end-tidal O2 and CO2 fractions, O2 blood saturation, exhaled gas volume, mask pressures and inhaled gas temperature. Subjective ratings were obtained after each breathing perioRESULTS: With the Hi-Ox, fIO2 exceeded 0.80+/-0.04 at 4 L[sum]min-1 O2 flow rate; for the simple facemask the highest fIO2 was 0.60+/-0.03 at 9 L[sum]min-1. Of 20 REMO, 8 were damaged and unserviceable on delivery. With the remaining units, leakage was so severe that the lowest flow rate achieved was 4 L[sum]min-1 with 2 units. With the other 10, the flow rate was not sufficient unless leaks were sealed with tape. When sealed, the mean O2 flow rate was 1.85+/-0.75 L[sum]min-1 to reach a mean fIO2 of 0.81+/-0.08. On the other hand, the REMO showed elevated fICO2, high breathing resistance, high perceived breathing effort and mask discomforCONCLUSIONS: Owing to design problems, the current REMO was inadequate in providing O2 therapy. The Hi-Ox appeared to be a better choice for remote areas. Its reduced flow rate makes the use of miniature O2 concentrators feasible
Description: Undersea and Hyperbaric Medical Society, Inc. (http://www.uhms.org )
URI: http://archive.rubicon-foundation.org/3631
Date: 2006

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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