Hypoxia decreases the ability to think, orient, see properly, or perform tasks. Of all the cells in the body, brain cells are the most vulnerable to hypoxia. Unconsciousness and death can occur in brain cells before the effects of hypoxia are apparent in other cells. The victims of hypoxia do not usually understand what is occurring, and they may even experience a feeling of well-being. Signs and Symptoms:
• Frequently none (the diver may simply lapse into sudden unconsciousness)
• Mental changes similar to those of alcohol intoxication
• Confusion, clumsiness, slowing of response
• Foolish behavior
• Cyanosis (bluish discoloration of the lips, nailbeds, and skin)
• In severe cases, cessation of breathing