injuries poisoning
Gas Toxicity During Diving
Oxygen toxicity
Oxygen toxicity typically occurs when the partial pressure of oxygen exceeds 1.3 to 1.4 atmospheres, equivalent to about 57 m (187 ft) depth when air is breathed and shallower when enriched oxygen breathing mixtures are used. Symptoms include paresthesias, seizures, vertigo, nausea, vomiting, and constricted (tunnel) vision. About 10% of patients have generalized seizures or syncope, which typically results in Drowning . 