CXR (on arrival and after 4 hours)
ABG - lactic acidosis
Serum sodium does not correlate to fresh water vs. salt water drowning
Other work-up generally not needed unless specifically indicated by history or exam, but may consider:
Labs, EKG
CT head/C-spine (if history of trauma) - C-spine injury extremely unlikely without evidence or history of trauma (<0.5% in large cohort study)
Labs, EKG
CT head/C-spine (if history of trauma) - C-spine injury extremely unlikely without evidence or history of trauma (<0.5% in large cohort study)
Typically a clinical diagnosis
Submersion injury
Hypothermia
Blast injury
Immersion pulmonary edema
Stingray injury
Marine toxins, envenomations, and bites
High-pressure injection injury
Scuba diving emergencies