Case No. 104

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Case No. 104


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Chief Complaint:

Loss of consciousness underwater

Published: Sept. 6, 2017
Author: SaraEH

A 23 y/o male is rescued and brought to shore after suffering a brief loss of consciousness while diving at around 300 ft. underwater: using standard air (oxygen-nitrogen mixture). Beforehand, the patient’s anxiety about the dive was apparent, as it was his first time attempting a dive at such a depth. At 300 ft., a fellow diver noticed the patient acting erratically and immediately knew something was wrong. Upon helping his fellow diver to a regulated ascent towards the surface, he noticed the patient regain consciousness. After this incident, the patient does not complain of any lasting effects except obvious amnesia from the event. The diver's equipment is later checked for any defects but there are no significant findings.


What did the diver most likely experience?

  • Oxygen toxicity
  • Decompression sickness (The Bends)
  • Nitrogen narcosis
  • Cerebral air Embolism
  • Carbon monoxide poisoning
  • Syncope
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