Reassure the casualty and encourage him to slow his breathing rate.
Place a paper bag or other suitable item over his nose and mouth.
Have him breathe into the bag and rebreathe the exhaled air, which has a high
concentration of carbon dioxide. (para 3-3c(1)(b))
When the pressure gauge registers 200 p.s.i. (or the local SOP safe residual
guideline). (paras 3-5c(1)(c), 3-7d(2))
(Cylinder pressure - safe residual) x conversion factor =
(2100-200)(1.56) = 1900 x 1.56 = 2964 = 329.3 minutes or 5 hours 29 minutes
1 inch (2.5cm).
Any four of the following
Change in blood pressure.
Increasing heart rate.
Increased respiratory rate. (para 3-7h(1))
No smoking, no open flames.
Wool (or static-generating).
End of Lesson 3