CPAP Exam 2

Question 1

Static Compliance formula

Answer 1

Change in Volume/Change in pressure

**Change in pressure is done by plateau pressure - Baseline Pressure

Question 2

Definition of Airway Resistance and what the abbreviation is for formula

Answer 2

Amount of force required to push one liter of air into the lung in 1 second. Abbreviated as Raw

Question 3

Airway Resistance Formula

Answer 3

Raw= { (PiP - Pause)/inspiratory flow rate } x 60

Question 4

Minute ventilation abbreviation

Answer 4

vE

Question 5

Tidal Volume abbrev

Answer 5

vT

Question 6

Alveolar Ventilation

Answer 6

vA

Question 7

Dead Space: Tidal Volume Ration Abbrev

Answer 7

vD/vT

Question 8

1 Kilogram is equal to how many pounds?

Answer 8

1 Kg = 2.2 lbs

Question 9

Normal Lung Compliance range

Answer 9

50-100mL/1cmH2O

Question 10

Normal Raw range

Answer 10

0.5-1.5 or 0.5 to 2.5cmH2O/L/sec

Question 11

Normal spontaneous ventilation does what to venous return to the heart

Answer 11

Increases the venous return to the right side of the heart

Question 12

What is the term for the remaining air in the lungs at the end of passive exhalation?

Answer 12

Functional residual volume (FRC)

Question 13

Eupnea

Answer 13

Normal spontaneous breathing

Question 14

Hyperventilation

Answer 14

Breathing that results in DECREASED CO2 levels per ABG result

Question 15

Kussmaul breathing

Answer 15

Deep, uniform continuous breaths as seen in diabetic ketoacidosis

Question 16

Hyperapnea

Answer 16

Breathing at a larger volume than normal

Question 17

ventilation

Answer 17

movement of gases between the atmosphere and the lung

Question 18

Gradient

Answer 18

the pressure difference between two points

Question 19

Driving pressure

Answer 19

pressure gradient moving gas from high to low pressure

Question 20

ventilating pressures are always reads in what units?

Answer 20

psig or pressure on a gauge

Question 21

barometric pressure

Answer 21

Force exerted by air (gases) that surround body

Question 22

During inspiration, when does end-inspiration occur?

Answer 22

The pressure in thorax decreases until the pressures of the atm and alveoli are equal.

Question 23

Movement/excursion of diaphragm during normal vs deep inspiration

Answer 23

Normal moves about 1.5cm while deep inspiration move 6-10cm

Question 24

What does lung compliance evaluate?

Answer 24

the static characteristics of the lung

Question 25

In a normal person, what two dead spaces should be equal to each other?

Answer 25

Anatomic and physiologic dead space.

Question 26

ventilation without perfusion

Answer 26

Dead Space

Question 27

If Raw is increased, what will the ventilatory pattern be?

Answer 27

Deep, and slower

Question 28

If compliance is decreased, what will the ventilatory pattern look like?

Answer 28

Faster, shallow breaths

Question 29

What is the normal ventilatory pattern of a pt?

Answer 29

RR and Tidal Volume make up a patient’s vent pattern. Normal is 15RR and 500mL tidal volume

Question 30

What two forces make up surface tension

Answer 30

Surfactant/liquid-gas interface

Question 31

What is the normal pressure at sea level?

Answer 31

760mmHg

Question 32

During spontaneous breathing, on inspiration, what pressures change?

Answer 32

intra-alveolar and intra-pleural both DECREASE