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RES Biweekly 2 > Fouty- Pulmonary Circulation > Flashcards

Fouty- Pulmonary Circulation Flashcards

1
Q

where do bronchial arteries branch off from

A

intercostal arteries off the aorta

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2
Q

where do bronchial veins empty into that causes mixed oxygenated blood back to heart

A

pulmonary veins

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3
Q

where does gas exchange occur

A

b/t alveoli and capillaries

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4
Q

pulmonary arteries and pulmonary veins are separated by what

A

pulmonary capillaries

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5
Q

pulmonary arterial pressure is about ______ that of systemic (arterial) pressure

A

1/6th

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6
Q

in systemic circulation, ____% of blood is in venous side

A

85%

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7
Q

most of the tone is in pulmonary or systemic circulation

A

systemic

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8
Q

normal pulmonary arteries have ____ walls

A

thin

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9
Q
A

systemic circulation

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10
Q
A

pulmonary circulation

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11
Q

gold standard for measuring pulmonary pressures

A

R heart cath

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12
Q
A

RA (2-6 mmHg)

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13
Q
A

RV (25 mmHg/0-3mmHg)

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14
Q
A

pulmonary artery pressure
(25/10 mmHg)

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15
Q
A

pulmonary wedge pressure (LA pressure)

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16
Q

normal RA pressure

A

4 mmHg

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17
Q

normal RV pressure

A

25/0-8 mmHg

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18
Q

normal pressure in pulmonary artery

A

25/10 mmHg

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19
Q

normal pressure in LA (wedge pressure)

A

8-10 mmHg

20
Q

normal pressure in LV

A

125/8-10 mmHg

21
Q

normal pressure in aorta

A

120-125/80 mmHg

22
Q

mean pressure of aorta

A

93 mmHg

23
Q

mean pressure of pulmonary artery

A

14 mmHg

24
Q

flow through the normal pulmonary circulation is regulated by what 2 things

A

gravity and anatomic matching

25
Q
A

bronchiole and pulm. arteriole

26
Q

which occurs in the normal lung for efficient gas exchange to occur

A

3.

27
Q

there is more blood flow where in the lungs in part due to gravity

A

bases

28
Q

most important zone for matching ventilation and perfusion

A

zone 3

29
Q

what zone do you want to be in when floating a R heart catheter

A

zone 3

30
Q
A

zone 2

31
Q
A

zone 1 (mostly in upper lobes and not continuous blood flow)

32
Q

vascular and airway branching is symmetric or asymmetric

A

asymmetric

33
Q

______ is of minor importance for maintaining close V/Q matching in uninjured lungs

A

vasoregulation

34
Q

_____ vasoconstricts pulmonary arterial circulation and dilates systemic circulation

A

hypoxia

35
Q

pulmonary circulation constricts when PO2 in alveolus drops below _____ mmHg

A

60 mmHg

36
Q

hypoxic pulmonary vasoconstriction is critical in the _____ circulation

A

fetal

37
Q

why does blood flow from RV to pulmonary artery to aorta through patent ductus arteriosus in the fetus?

A

b/c pulmonary circulation is vasoconstricted b/c partial pressure is so low, blood flow doesn’t go in through lungs, it cuts across ductus arteriosus and delivers blood to aorta

38
Q

in hypoxic environment, ____ circulation needs to vasodilate to increase blood flow to areas that need it

A

systemic

39
Q

goal of pulmonary circulation

A

gas exchange O2 for CO2 (ventilation and perfusion)

40
Q

what happens to blood flow here

A

wont get any O2 and not able to get rid of CO2 due to air being replaced

41
Q

explain

A

vasoconstriction that occurs; increases resistance to the hypoxic alveoli and more likely to send blood to area with less resistance and good ventilation

42
Q

localized hypoxic pulmonary vasoconstriction ____ V/Q matching

A

improves

43
Q
A

less O2
low V/Q

44
Q
A

vasoconstriction occurring
less blood to that alveoli and more to the other to fix V/Q mismatch

45
Q

____circulation receives the entire cardiac output

A

pulmonary

46
Q

benefits of having entire cardiac output go through pulmonary capillaries

A

filters out small clots and bacteria

47
Q

3 things that can happen from reversal of flow in the heart

A

paradoxical emboli causing strokes
brain abscesses
hypoxemia

RES Biweekly 2 (14 decks)

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