As a general rule, any diver who has breathed gas under pressure at any depth who surfaces unconscious, loses consciousness soon after surfacing, or displays neurological symptoms within about 10 minutes of surfacing should be assumed to be suffering from arterial gas<unk> . Symptoms of arterial gas<unk>  may be present but masked by environmental effects such as hypothermia, or pain from other obvious causes. Neurological examination is recommended when there is suspicion of lung overexpansion injury. Symptoms of decompression sickness may be very similar to, and confused with, symptoms of arterial gas<unk> , however, treatment is basically the same. Discrimination between gas<unk>  and decompression sickness may be difficult for injured divers, and both may occur simultaneously. Dive history may eliminate decompression sickness in many cases, and the presence of symptoms of other lung overexpansion injury would raise the probability of gas<unk> .
Air embolism
Pulmonary aspiration
Aspiration pneumonia
Pulmonary hemorrhage
Airway obstruction
Right heart strain
Thoracic insufficiency syndrome
Lung infarction