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External compression headache is caused by any type of headwear. This includes headwear that places pressure on the head — including tight hats, helmets, headbands, wigs and other artificial hair accessories, headphones and goggles. It is not known why some people are more sensitive than others to this type of pressure.
The signs and symptoms of these may present during a dive, on surfacing, or up to several hours after a dive. The principal conditions are decompression illness (which covers decompression sickness and arterial gas embolism), nitrogen narcosis, high pressure nervous syndrome, oxygen toxicity, and pulmonary barotrauma (burst lung). Although some ...
Cold shock response is a series of neurogenic cardio-respiratory responses caused by sudden immersion in cold water. In cold water immersions, such as by falling through thin ice, cold shock response is perhaps the most common cause of death. [1] Also, the abrupt contact with very cold water may cause involuntary inhalation, which, if ...
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Cold water in the outer ear passage, chilling the inner ear, particularly severe if the eardrum is ruptured. Use of a hood to keep the head covered. Water leaking into the hood will warm up before entering the external auditory opening and will be reasonably warm before reaching the eardrum, and will soon reach body temperature if flushing is ...
Video: Setting the bezel of a diving watch to the start time of the dive at the beginning. Divers used this in conjunction with a depth gauge and a decompression table to calculate the remaining safe dive time during dives. Dive computers rendered this cumbersome procedure unnecessary.
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Donning knit hats and gloves, the group waded through the stinging-cold water to squat in the Sound anywhere from two to 30 minutes. As their bodies adjusted to the chill, the sound of laughter ...