Possibilities for Mass Casualty Oxygen Systems in Search and Rescue Missions Part 1: The VIASYS Hi-Ox80™


  1. Bouak, F.
  2. Eaton, D.J.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN)
An experiment was carried out at Defence R&D Canada – Toronto to recommend an efficient oxygen breathing system for multiple casualties in remote areas. The objective was to improve the oxygen therapy capability and efficiency of the Canadian Forces Search and Rescue Technicians as well as any military organization that may potentially need to dispense oxygen to survivors of a mass casualty scenario such as in a field hospital or during submarine escape and rescue. Twenty-four trials were completed using twelve male and female volunteers (30-55 years) to compare the VIASYS Hi-Ox80™ mask to a simple facemask. Measurements were made with the subjects at rest in seated and supine positions to simulate an injured person being administered oxygen (O2). The Hi-Ox80™ delivered significantly higher O2 concentrations to the subjects at lower flow rates than the simple facemask. Given the high O2 concentrations, low O2 flow rates, low levels of inhaled carbon dioxide, constant levels of the exhaled carbon dioxide and low breathing resistance, the Hi-Ox80™ could be an efficient breathing unit for mass casualty treatment in a remote area. If an O2 concentration of 80% is adequate for treatment, the duration of a pressurized tank or the number of patients treated can at least triple with a flow rate of 4 litres per minute when compared to the currently used O2 systems. Furthermore, this O2 flow rate can allow the use of portable O2 concentrators, thereby increasing the efficie

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Oxygen breathing system;Simple facemask;VIASYS Hi-Ox80;Open circuit;Oxygen therapy;Search and Rescue;paramedics;First-aid oxygen;Normobaric oxygen;Oxygen concentrator
Report Number
DRDC-TORONTO-TR-2005-207 — Technical Report
Date of publication
01 Nov 2005
Number of Pages
Electronic Document(PDF)

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