Quick Answer
In survival scenarios, rebreathers are often the best option due to their efficiency in conserving oxygen, but they require precise setup and maintenance. First aid kits usually include simple oxygen masks like the bag-valve-mask (BVM) or oropharyngeal airways. For longer-term survival, oxygen tanks with proper regulators are a reliable option.
Choosing the Right Oxygen Mask
When selecting an oxygen mask for survival, consider the duration of use, accessibility of oxygen supply, and the individual’s respiratory needs. Rebreathers are ideal for situations where oxygen is scarce, but they demand technical expertise and regular maintenance to prevent CO2 buildup. The most straightforward option is the BVM, which can be used with a manual resuscitator bag and a 1-way valve to conserve oxygen.
Setting Up a BVM
A standard BVM typically consists of a face mask, a resuscitator bag, and a 1-way valve. To set it up, attach the bag to the valve, then connect the valve to the mask. The oxygen source can come from a tank or a manual squeeze bag. When using the BVM, maintain a 10-12 breaths per minute rate and ensure the oxygen flow is between 12-15 liters per minute.
Oxygen Tank Regulations
For longer survival periods, oxygen tanks with regulators are a reliable option. Ensure the tank is properly sized (e.g., a 2D oxygen tank for 1-2 persons) and the regulator is set to deliver 1-2 liters per minute. A pressure gauge should be attached to monitor the tank’s oxygen level. Always follow the manufacturer’s guidelines and local regulations regarding oxygen tank usage and storage.
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