Identify the physical requirements of the SCBA user - A. Physical
B. Agility
C. Facial features
D. Medical
E. Menta
Identify the hazardous environments requiring the use of respiratory protection
C. Smoke - 1. Smoke is the product of incomplete combustion
2. Suspended particles provide a mea...
SCBA (Self Contained Breathing
Apparatus)
Identify the physical requirements of the SCBA user - A. Physical
B. Agility
C. Facial features
D. Medical
E. Menta
Identify the hazardous environments requiring the use of respiratory protection
C. Smoke - 1. Smoke is the product of incomplete combustion
2. Suspended particles provide a means for the condensation of some of the gaseous products of
combustion
3. Some of these particles are lethal; some are irritating
4. Size of particle determines how deeply they will penetrate into the lung
A. Oxygen deficiency - 1. Combustion process consumes oxygen
2. Production of toxic gases may displace oxygen
3. Oxygen concentration diluted by other gases during combustion process
4. Physiological effects of reduced oxygen (hypoxia)
Identify the development of the SCBA
A. Evolution - 1. Breathing through beard
2. Pumping air to a mask
3. Independent air supply
,Identify the development of the SCBA
B. Closed-circuit - 1. Cylinder of compressed air
2. Regulator and valves
Identify the development of the SCBA
C. Open-circuit - 1. Cylinder of oxygen
2. Filter system
3. Regulator and valves
Identify the development of the SCBA - A. Evolution
B. Closed-circuit
C. Open-circuit
Identify the hazardous environments requiring the use of respiratory protection - A. Oxygen
deficiency
B. Elevated temperatures / super heated air
C. Smoke
D. Toxic gases
Identify the hazardous environments requiring the use of respiratory protection
a. 21% oxygen in air (Normal)
b. 19.5% OSHA and NFPA definition as oxygen deficient
c. 17% oxygen in air
i) Some muscular impairment
ii) Increase in respiratory rate
d. 12 % oxygen in air-Dizziness, headache, rapid fatigue
e. 9% oxygen in air-Unconsciousness
, f. 6% or less oxygen in air-Death occurs in minutes from respiratory failure and concurrent heart failure
Identify the hazardous environments requiring the use of respiratory protection
B. Elevated temperatures / super heated air - 1. Heated air can damage respiratory tract
a. Excessive heat (120-130 degrees)
i) Blood pressure drop
ii) Circulatory failure
b. Inhalation of heated gases
i) Pulmonary edema
ii) Death from asphyxiation
c. Respiratory tissue injury is not immediately reversible with the introduction of fresh, cool air
Identify the hazardous environments requiring the use of respiratory protection
D. Toxic gases - 1. During fires, a firefighter will be exposed to various combinations of irritants
and toxicants
2. Harmful effects of inhaled toxic gases
3. Commonly found fire gases
Toxic Gases
1. During fires, a firefighter will be exposed to various combinations of irritants and toxicants - 1.
During fires, a firefighter will be exposed to various combinations of irritants and toxicants
a. Each fire will present differing products of combustion
b. Combinations may have a synergistic effect
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