The ignition of unburned fire gases at the top of the compartment is known as:

A need for some form of ventilatory support is usually indicated when an adult's rate of breath-ing rises above what level?

a. 35/min b. 30/min c. 25/min d. 20/min

An epidural catheter is inserted into the:

A. lumbar spine. B. cervical spine. C. urethra. D. jugular vein.