Therapeutic Gasses

Question 1

List the Therapeutic Gasses

Answer 1

Air
Oxygen(O2)
Nitrogen (N2)
Mixed Gases ( Helium-Oxygen and Nitrogen Oxygen)

Question 2

CNS Oxygen Toxicity

Answer 2

Increased production of oxygen free radicals are potentially toxic to cell membranes, enzymes, nucleic acids, and other cell constituents

Question 3

Symptoms of CNS O2 Tox

Answer 3

Visual Disturbances
Ear - Tinnitus, ringing, or roaring
Nausea/vomiting
Tingling/Twitching
Irritability - confusion/dysphoria
DIzziness
Convulsions

Question 4

Threshold levels of CNS O2 Tox

Answer 4

0-0.5 ATA = innocuous
0.5-2.0 ATA = exposure limited by pulmonary O2 tox
>2.0 ATA = exposures limited by CNS Tox

Question 5

Phases of seizure

Answer 5

Tonic - 1 minute
Clonic - 3-4 minutes
Post-ictal - 5-30 mintues

Question 6

Pulmonary O2 Tox

Answer 6

Risk of pulmonary O2 tox can occur at 0.6 ATA
Related to length of exposure
Symptoms may appear after 12-16 hours on 100% O2 on surface

Question 7

Signs and Symptoms of Pulmonary O2 Tox

Answer 7

End-respiratory discomfort
Substernal burning and severe pain on inspiration
SOB
Pulmonary Edema
Paroxysmal cough

Question 8

Acute Exudative Phase of Pulmonary O2 Tox

Answer 8

Edema
Intraalveolar hemorrhage
Destruction capillary endothelial cells and type I alveolar epithelial cell

Question 9

Subacute proliferative phase of Pulmonary O2 Tox

Answer 9

Interstitial fibrosis

Hyperplasia of type II alveolar epithelial cells