Hypercapnia
Sx:
(1) Increased breathing rate
(2) Shortness of breath
(3) Confusion or feelings of euphoria
(4) Inability to concentrate
(5) Increased sweating
(6) Drowsiness
(7) Headache
(8) Loss of consciousness
(9) Convulsions
Hypercapnia
Treatment of Hypercapnia
(1) Decreasing the level of exertion to reduce CO2 production
(2) Increasing helmet and lung ventilation to wash out excess CO2
(3) Shifting to alternate breathing source or aborting the dive if defective equipment is the cause.