• John M Lippmann and John H Pearn.
• Divers Alert Network Asia-Pacific, Melbourne, VIC, Australia.
• Med. J. Aust.. 2012 Aug 20;197(4):230-2.

ObjectiveTo examine the frequency and causes of snorkelling-related deaths in Australia.Design, Setting And SubjectsWe conducted a retrospective analysis of snorkelling-related deaths recorded in Australia from 1994 to 2006 inclusive, based on information from the Divers Alert Network Asia-Pacific database, the National Coroners Information System, coronial files from all states and territories, and annual national drowning reports.Main Outcome MeasuresNumber and attributed causes of snorkelling-related deaths.ResultsWe identified 140 snorkelling-related deaths. Forensic details were available for 130 of these. Four principal cause-of-death categories were identified: deaths from cardiac or suspected cardiac causes (60), deaths from surface drowning (largely in inexperienced snorkellers) (33), deaths from drowning after prolonged breath-hold diving (largely in experienced divers) (19), and deaths from trauma (10). Eight people died of other causes.ConclusionsIn the context of the large population sampled, snorkelling-related deaths are rare. Preventive measures for such deaths could include pre-dive medical assessments for people with a history of cardiac or respiratory disease or with a family history of sudden unexpected death; improved training in how to use snorkelling equipment; better matching of skills to health, fitness and water conditions; better supervision and quality training of supervisors in rescue and resuscitation techniques; and avoidance of hyperventilation before breath-hold diving.

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