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Barotrauma injury to tiger angelfish – head end. Note distended swim bladder (centre) and gas space in abdominal cavity (left) Barotrauma injury to tiger angelfish – tail end. Fish with isolated swim bladders are susceptible to barotrauma of ascent when brought to the surface by fishing. The swim bladder is an organ of buoyancy control ...
the rate of ascent – the faster the ascent the greater the risk of developing DCS. The U.S. Navy Diving Manual indicates that ascent rates greater than about 20 m/min (66 ft/min) when diving increase the chance of DCS, while recreational dive tables such as the Bühlmann tables require an ascent rate of 10 m/min (33 ft/min) with the last 6 m ...
Nevertheless, barotrauma occurs and can be life-threatening, and procedures for first aid and further treatment are an important part of diving medicine. Barodontalgia. Barotraumas of descent (squeezes) Ear squeeze (also alternobaric vertigo) Sinus squeeze (aerosinusitis) Tooth squeeze (dental barotrauma, barodontalgia) Mask squeeze; Helmet squeeze
The speed of ascent has to be a compromise between too slow (and running out of oxygen before reaching the surface) and too fast (risking decompression sickness). [9] Lung barotrauma is unlikely in a healthy diver who allows the air to escape freely from the lungs. Middle ear and sinus barotrauma are also possible if ascent rate is too fast and ...
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On ascent from a dive, inert gas comes out of solution in a process called "outgassing" or "offgassing". Under normal conditions, most offgassing occurs by gas exchange in the lungs . [ 9 ] [ 10 ] If inert gas comes out of solution too quickly to allow outgassing in the lungs then bubbles may form in the blood or within the solid tissues of the ...
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 of these may occur in other settings, they are of particular concern during diving activities.