Millions of people travel out of their home countries each year to dive. All divers should have evacuation/accident insurance and a membership in the Divers Alert Network.The minimum dive-to-fly interval is 12 hours but may be up to 24 hours. Risk depends on time from last dive to flight time, frequency of dives, and whether decompression stops were necessary. Flying can lead to decompression sickness because it is a form of rapid ascent.For malaria chemoprophylaxis, Malarone (atovaquone-proguanil) has fewer side effects than other antimalarials.Cold climate or winter diving requires specialized diving suits to prevent hypothermia.Lung barotrauma is prevented by blowing bubbles during a slow ascent. Air can be forced into the skin, abdomen, or chest, with the latter resulting in a collapsed lung or air embolus. Lung barotrauma can be life-threatening and is caused by pressure build up in the lungs on ascent when the diver fails to exhale.Any nasal or sinus congestion precludes effective equalization and increases risk. Ear trauma or ear drum rupture can be prevented by pausing during ascent to equalize the pressure (try exhaling with the mouth closed and nose pinched). Barotrauma is common and is caused by trapped air in the ears, sinuses, and lungs as well as in the gastrointestinal tract.Pre-scuba medical evaluations should ensure the absence of significant pulmonary, cardiac, sinus, ear, metabolic, or psychological illness.Travelers should only dive with an operator certified by the Professional Association of Diving Instructors (PADI).
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