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Flashcards in chapter 4 Deck (19)
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1
Q

exhaled gases

A

nitrogen -78.8%
o2- 17%
co2-4%

2
Q

Pao2 is determined by?

A

PO2

3
Q

PaO2 is also determined by how high _________?

A

PAo2

4
Q

rq varies with ________?

A

disease

5
Q

diffusion occurs because of ________and moves co2 of _____ and o2 ______?

A

pressure gradient, 6 mm hg, 60 mm hg

6
Q

v/q mistmatch occur because________?

A

ventilation exceeds perfusion

perfusion exceed ventilation

7
Q

high v/q we have_________?

A

increased physiologic deadspace, wasted ventilation and po2 is high and high pco2

8
Q

pulmonary circulation

A

3-5% and bronchial arteries, and thebesien viens.

9
Q

as v/q ratio lowers?

A

hypoxia worsens, pco2 is not effected unless there is hypoventilation

10
Q

in the absence of v/q mismatching, PA-aO2 would be ________?

A

zero

11
Q

young healthy individual has pA-aO2 diffence would be___________and in adult is _________?

A

5-15 mmg, and is higher

or greater than 100 mm hg with fio2 of 100%

12
Q

pa02/fio2 normal?

A

normal is greater than 300
less 300 indicates a severe deficit in gas exchange
less than 200 indicates acute respiratory distress syndrome

13
Q

pulmonary right to left shunt

A

increased-decreased

14
Q

ventilation perfusion imbalance

A

increased-decreased

15
Q

diffusion barrier

A

increased-decreased

16
Q

hypoventilation

A

normal- decreased

17
Q

cardiac-right to left shunt

A

increased-decreased

18
Q

decreased pio2

A

normal-normal

19
Q

low mixed venous o2 content

A

increased - decreased