emt chapter 11

The pressure of gas in a full cylinder of oxygen is approximately _______ pounds per square inch (psi).

2,000

at a flow rate of 6 L/min, a nasal cannula can deliver an approximate oxygen concentration of up to:

44%

a oxygen cylinder should be taken out of service and refilled when the pressure inside is less than:

500 PSI

With a good mask-to-face seal and an oxygen flow rate of 15 L/min, the non breathing mask is capable of delivering up to _____% inspired oxygen.

90

which of the following oxygen flowmeters is NOT affected by gravity and can be used in any position when attached to an oxygen cylinder?

Bourdon-gauge flowmeter

which of the following patients is breathing adequately

a conscious male with respirations of 19 breaths/min and pink skin

Gas exchange in the lungs is facilitated by:

adequate amounts of surfactant.

high-flow oxygen with a nasal cannula during the preoxygenation phase of endotracheal intubation is called:

apneic oxygenation

which of the following is NOT found in the upper airway?

bronchus

oxygen toxicity is a condition in which:

cellular tissue damage occurs from excessive oxygen levels in the blood.

irregular respirations characterized by an increasing rate and depth of breathing followed by periods of apnea are called:

cheyne-stokes respirations

which of the following is a late sign of hypoxia?

cyanosis

the presence of elevated carbon dioxide levels in the blood is called:

hypercarbia

The hypoxic drive is influenced by:

low blood oxygen levels

which of the following organs or tissues can survive the longest without oxygen?

muscle

A patient who is suspected of being hypoxic and is breathing adequately should be given supplemental oxygen with a:

nonrebreathing mask

The diaphragm is innervated by the _________ nerve, which allows it to contract.

phrenic

which of the following factors will cause a reduction in minute volume in an adult ?

shallow breathing

structures of the lower airway include all of the following, EXCEPT

the epiglottis

what is the MOST common cause of airway obstruction in an unconscious patient?

the tongue