Symptoms of CNS O2 Toxicity

VENTID-C

Vision Blurred

Ears-Ringing Roaring

Nausea-

Twitching or Tingling of extremities

Irritability

Dizziness

Convulsions

SX of Hypoxia ?

WILLL DEAL

-Weakness

-Inability to perform skill-requiring or delicate tasks

-Loss of judgement

-Lack of concentration

-Lack of muscle control

-Drowsiness

-Euphoria

-Agitation

-Loss of consciousness

-Death  /  Pulse & BP increase / Cyanosis of lips, nail beds and skin

TX of Hypoxia

100% O2

Basic 1st Aid

Shift diver to alternate banks and ventilating

Causes of Hypoxia

Improper Line-up of breathing gases

Partial or complete blockage of fresh gas injection in semiclosed UBAs.  Failure of O2 addition valve

Inadequate purging of breathing bags MK-25

Blockage of air passageways by vomit, secretions, water or foreign objects

Collapse of lung due to pneumothorax

Paralysis of respiratory muscles from spinal cord injury

Accumulation  of fluid in lung tissue (Pulmonary edema) (drowning) (chokes)

Carbon Monoxide (CO) Poisoning

Breathholding - PPO2 decreases on ascent

Definition of Hypoxia?

Drop in ppO2 below ____ will cause the onset of hypoxia?

ppO2 of_____ causes helplessness?

ppO2 of _____ causes unconsciousness, brain damage and death?

- Abnormal deficiency of Oxygen in arterial blood.

- .16 ppo2 will feel effects

- .11 ppO2 causes helplessness

- .10 and below ppO2 causes unconsciousness, brain damage and death