Egans chapter 43

Question 1

For gas to flow through the airway

Answer 1

pressure gradient must exist

Question 2

affects the impact of Ppl change on diaphragm

Answer 2

intraabdominal pressure (Pab)

Question 3

the pressure in the pleural space, the virtual space between the visceral and parietal pleurae

Answer 3

intrapleural pressure (Ppl)

Question 4

usually negative in relation Ppl

Answer 4

alveolar pressure (Palv)

Question 5

Pawo − Pbs

Answer 5

transrespiratory pressure (Ptr)

Question 6

The lungs are represented by

Answer 6

transalveolar pressure: (PL = Palv − Ppl).

Question 7

The chest wall is represented by

Answer 7

trans–chest wall pressure: (Ptcw = Ppl − Pbs)

Question 8

If the lungs and chest wall are lumped together, they can be represented by

Answer 8

transthoracic pressure: (Ptt = Palv − Pbs).

Question 9

This pressure gradient is the difference between intraabdominal pressure and pleural pressure and affects diaphragmatic movement

Answer 9

transdiaphragmatic pressure (Pdi).

Question 10

Check this out

Answer 10

TABLE 43-1 Changes in Airway Pressure Gradients During Spontaneous, Negative, and Positive Pressure Ventilation