Which of the following are advantages of a two-stage reducing valve compared with a single-stage reducing valve?
I. Higher flows may be provided.
II. More accurate pressure regulation is possible.
III. Stable high flow rates are possible.
IV. It is more compact than a single-stage reducing valve

In contrast to a needle cricothyrotomy, an open cricothyrotomy:

A) involves the use of a high-pressure jet ventilator. B) enables the paramedic to provide greater tidal volume. C) is the preferred technique in patients with short, fat necks. D) is easier to perform in children younger than 8 years of age

Sea air is rich in ozone

Indicate whether the statement is true or false