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Conditions that may increase risk of diving disorders, but are not necessarily absolute contraindications: Patent foramen ovale; Diabetes mellitus — No serious problems should be expected during dives due to hypoglycaemia in divers with well-controlled diabetes. Long-term complications of diabetes should be considered and may be a ...
Diving disorders are medical conditions specifically arising from underwater diving. 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 ...
These conditions will usually be detected in the diving medical examination required for professional divers. Recreational divers are not all screened at this level. Complete emptying of the lungs is not recommended in emergency swimming ascents as this is thought to increase the risk by collapsing small air passages and trapping air in parts ...
DCS most commonly occurs during or soon after a decompression ascent from underwater diving, but can also result from other causes of depressurisation, such as emerging from a caisson, decompression from saturation, flying in an unpressurised aircraft at high altitude, and extravehicular activity from spacecraft.
Causes of Death: Equipment failure, improper ascent/descent, cardiac arrest The Professional Association of Diving Instructors estimates that there are between 1.6 and 2.9 million active divers in ...
Conditions which significantly compromise the cardiovascular system, respiratory system or central nervous system may be considered absolute or relative contraindications for diving, as are psychological conditions which impair judgement or compromise the ability to deal calmly and systematically with deteriorating conditions which a competent ...
High-pressure nervous syndrome (HPNS – also known as high-pressure neurological syndrome) is a neurological and physiological diving disorder which can result when a diver descends below about 500 feet (150 m) using a breathing gas containing helium. The effects experienced, and the severity of those effects, depend on the rate of descent ...
Diving and hyperbaric medicine: Symptoms: Vertigo, nystagmus, nausea, ataxia, hearing loss: Causes: Gas bubbles forming in inner ear and associated vascular system from supersaturation: Risk factors: Deep diving, long decompressions, gas switching with helium mixtures, right-to-left shunt: Diagnostic method: By symptoms, inner ear involvement ...