FINAL health risk ass

Question 1

refrigeration

Answer 1

water vapor in the air freezes (liquid to gas) - after 15 minutes it is all gone

Question 2

5 major steps in assessing health risk

Answer 2

Hazard Identification:    Agent  or situation
Receptor Characterization
Exposure Assessment
Dose Response Assessment
Risk Characterization

Question 3

what factors influence toxicity

Answer 3

life stage
route of exposure
duration of exposure
adme (abosroption, distribution metabolism, excreation

Question 4

step 1
step 2
Steps 3 and 4:

Answer 4

hazard identification

Receptor

Characterization

Exposure and Dose Response Assessment

Question 5

propane

Answer 5

c3h8- saturated, hydrocarbon

Question 6

Chemical and Physical Properties of Propane

Answer 6

colourful
odour
minu 42 degree boiling point
heavier than air

Question 7

Receptor Characterization

Answer 7

Ambulatory (could walk) 
Operated a vehicle
Removal from immediate vicinity
Telephone conversation –no slurring of speech
No Nausea- Ate Lunch
No evidence of frost bite or skin damage

Question 8

Simple Asphyxiants

Answer 8

Physiologically Inert
Do not suppress or alter the physiological functions or anatomical integrity of living organisms
Lower the percent of oxygen in inspired air
Result in decline in oxygen saturation and adequate oxygen delivery to tissues and cells.
Insufficient cellular oxygenation

Contrast: Chemical Asphyxiant
Carbon Monoxide

Question 9

Symptoms of Asphyxiation

Answer 9

Propane Exposure known to produce symptoms of Asphyxiation
> 140,000 ppm or 14%
Characterized by:
Dizziness, laboured breathing, increased heart rate, headache, nausea, vomiting, lethargy, stupor and coma, loss of consciousness

Question 10

below 6-10% oxygen
PO2 (6-10%)
45.6 mmHg

Answer 10

Nausea, Vomiting, Lethargy

Unconsciousness

Question 11

PO2 (< 16%)

Below 122 mmHg

Answer 11

Increased breathing rate
Increased heart rate
Slight incoordination

Question 12

Inspired O2 Pressure-Symptoms:
PO2 (21%)
160 mmHg-122 mmHg

Answer 12

none