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RES Biweekly 3 > Fouty- V/Q Matching > Flashcards

Fouty- V/Q Matching Flashcards

1
Q

PiO2

A

150 mmHg

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2
Q

PH2O

A

47 mmHg

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3
Q

PAO2

A

100 mmHg

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4
Q

PACO2

A

40 mmHg

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5
Q

critical in determining O2 content and delivery

A

partial pressure of O2 in the alveolus

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6
Q

Alveolar gas equation: PAO2=

A

PAO2 = (Pb - PH2O) x FIO2 - PaCO2/R

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7
Q

LA PaO2

A

90 mmHg

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8
Q

normal A-a gradient

A

10-12mmHg

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9
Q

______ventilation is what is reacting with blood not minute ventilation

A

alveolar

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10
Q

normal V/Q ratio

A

1.0

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11
Q

goal: match ventilation w/

A

perfusion

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12
Q

hyperinflation
flat diaphragm

A

emphysema

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13
Q
A

emphysema

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14
Q

is ventilation normal or abnormal in emphysema

A

abnormal

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15
Q

ventilation normal or abnormal in asthma

A

abnormal

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16
Q

ventilation normal or abnormal in bronchiectasis

A

abnormal

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17
Q

ventilation normal or abnormal in bronchiolitis obliterans

A

abnormal

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18
Q
A

heart failure (pulmonary edema)

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19
Q

airspace disease is seen where and it impacts ventilation here

A

lingula (L heart border missing)

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20
Q
A

lobar pneumonia; impacts ventilation

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21
Q

pollution in the air can impair______ (causes bronchoconstriction)

A

ventilation

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22
Q
A

perfused but not ventilated

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23
Q

L and R

A

L: normal
R: severe asthma

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24
Q

what is affected by pulmonary embolism

25
pulmonary embolism
26
shunt V/Q
0
27
shunting allows for what
V/Q matching elsewhere
28
low V/Q mismatch causes what
hypoxemia (perfused but not ventilated well)
29
high V/Q mismatch
ventilated but not perfused
30
___ and ____ contribute to arterial hypoxemia
shunt and low V/Q
31
_____ causes dead space and represent wasted ventilation
high V/Q
32
no air in alveolar space caused by what 2 main things
pneumonia and atelectasis
33
anatomic dead space
conduction zone
34
minute ventilation (VE)=
VA (alveolar ventilation) + VD (dead space)
35
____ controlled by CO2 production and alveolar ventilation
CO2
36
doesn't cause hypoxemia, just increases work of breathing
dead space
37
VD (dead space)=
anatomic dead space + alveolar dead space
38
_____ of normal tidal volume at rest is dead space
1/3rd
39
rapid shallow breathing causes what
dead space
40
alveolar dead space due to pulmonary vascular disease, acute pulmonary embolus and decreased CO causes what
dead space
41
ventilation in excess of perfusion due to + pressure ventilation and emphysema causes what
dead space
42
causes what
dead space (due to pulm embolism)
43
_____ can lead to pulmonary artery and arteriole dropout (rarefication)---dead space
PAH
44
does NOT cause hypoxemia (due to no blood flow there)
high V/Q units
45
example of this is bronchial obstruction (mucous plug) causing atelectasis
shunt
46
best estimate of low V/Q mismatch
alveolar-arterial oxygen gradient (A-a)
47
how to get PaO2
ABG
48
how to get PAO2
alveolar gas equation
49
causes increased A-a gradient
low V/Q shunt (areas of perfused blood that is not getting oxygenated)
50
PaO2< 80mmHg
hypoxemia
51
5 main causes of hypoxemia
altitude hypoventilation diffusion low V/Q mismatch shunt
52
hypoxemia with normal A-a gradient due to
altitude hypoventilation
53
hypoxemia with increased A-a gradient due to
diffusion low V/Q mismatch shunt
54
in this the capillary O2 is the same as venous O2
shunt
55
responds to low flow oxygen
low V/Q mismatch
56
anytime you have PAO2 > 120 mmHg, means what
Hb completely saturated (can't take on anymore)
57
doesn't respond to 100% oxygen
shunt
58
asthma chronic bronchitis emphysema ILD
low V/Q
59
pneumonia atelectasis ARDS CHD anomalous venous return
shunt

RES Biweekly 3 (11 decks)

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