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Prior to convulsion, several symptoms may be present – most distinctly that of an aura. During 1942 and 1943, Professor Kenneth W Donald, working at the Admiralty Experimental Diving Unit, carried out over 2,000 experiments on divers to examine the effects of oxygen toxicity. To date, no comparable series of studies has been performed.
Approximately 90 percent of patients with DCS develop symptoms within three hours of surfacing; only a small percentage become symptomatic more than 24 hours after diving. [3] Below is a summary comparison of the signs and symptoms of DCI arising from its two components: Decompression Sickness and Arterial Gas Embolism. Many signs and symptoms ...
Lower back pain may be caused by a heavy weightbelt hanging from the small of the back, counteracting the buoyancy of the diving suit which is distributed over the full length of the diver. This effect can be reduced by use of integrated weight systems which support the weights over the length of the back on the diving harness backplate.
Three-month follow-ups on diving accidents reported to DAN in 1987 showed 14.3% of the 268 divers surveyed had ongoing symptoms of Type II DCS, and 7% from Type I DCS. [ 110 ] [ 111 ] Long-term follow-ups showed similar results, with 16% having permanent neurological sequelae.
The Naval School, Diving and Salvage was re-established at the Washington Navy Yard in 1927, and the Navy Experimental Diving Unit (NEDU) was moved to the same venue. In the following years, the Experimental Diving Unit developed the US Navy Air Decompression Tables, which became the accepted world standard for diving with compressed air. [36]
Symptoms of mild DCS have been described as being one or more of musculoskeletal pain, rash, subjective sensory change in a non-dermatomal distribution, and constitutional symptoms such as fatigue. Divers with only these symptoms could be adequately managed with surface oxygen, observation, and consultation with a diving physician.
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Diving medicine deals with medical research on issues of diving, the prevention of diving disorders, treatment of diving accidents and diving fitness. The field includes the effect of breathing gases and their contaminants under high pressure on the human body and the relationship between the state of physical and psychological health of the ...
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