Gamow Bag is a hyperbaric chamber is a sealable pressure vessel large enough for one adult to enter and stretch out, where he or she can be supplied with oxygen under pressure. The Portable Altitude Chamber, PAC, was designed to treat severe altitude sickness when immediate descent, the preferred treatment, is not possible.
At 9,800 feet (3,000 m), the Gamow Bag can simulate a descent of 4,800 feet (1,500 m) making it the best and most effective treatment. The Gamow Bag is only recommended at very high altitudes such as staying at Crater Camp on Mount Kilimanjaro where fast and immediate descent is not feasible. One should never attempt to hike higher, once symptoms arise on a Kilimanjaro trek as they can swiftly develop into High Altitude Pulmonary Edema, HAPE, where lungs are fluid congested and it is necessary to administer extra oxygen through a face mask. This is not possible in a Gamow bag.
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