Ventilation, Perfusion, Shunt Flashcards Preview

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Flashcards in Ventilation, Perfusion, Shunt Deck (59)
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1

Blood Flow

Perfusion (Q)

2

Air Flow

Ventilation (V)

3

At rest, your perfusion (Q) will be ______ in the reserve capillaries.

Slower

4

At rest, what type of blood flow is present throughout the lungs?

Gradient Blood Flow

5

At rest, the reserve capillaries will be toward the _____ of the lung

Apex

6

At rest, the recruited capillaries will be toward the ____ of the lung

Base

7

At rest, your perfusion (Q) will be ______ in the recruited capillaries of the lung.

Fast

8

At rest, in an individual capillary you have slow transit of blood in ______ capillaries and fast/rapid transit of blood in the _____ capillaries.

Reserve; Recruited

9

In other words, at rest, the blood flow in one minute will be lower in _______ capillaries than ______ capillaries.

Reserve; Recruited

10

During exercise, what type of blood flow is present throughout the lungs?

Even Blood Distribution; apex and base of the lung are the same.

11

In other words, during exercise, the blood flow in one minute will be _______ in reserved capillaries and recruited capillaries.

THE SAME

** Higher blood flow overall than at rest **

12

At rest, the mean arterial pressure will be ________.

Pretty low

13

V and Q are going to be greater at which part of the lung during rest?

Base of the lung

14

At rest, some of the alveoli at the BASE of the lung will be _______.

Collapsed

15

At rest, some of the alveoli at the APEX of the lung will be _______.

Inflated

16

At rest, V or Q is more evenly distributed?

V - Ventilation

17

At rest, why is perfusion (Q) more distributed at the base of the lung?

Below the heart and due to gravity.

18

At rest, a high obstruction of the heart can cause a decreased _____V or Q______.This can lead to what condition?

V (Ventilation). Could lead to Pulmonary Arterial Hypertension (>125 mm Hg)

** Common cause of obstruction in the lung is bronchitis **

19

During exercise, you are using all capillaries (Fully recruited capillaries). Why?

Because of the high/rapid perfusion that needs to get all over the lungs.

20

During exercise, your mean arterial pressure is roughly ______ mmHg.

30

21

At rest, your mean arterial pressure is roughly ____ mm Hg.

15

22

Lung zones locally modulare Q and V by what two actions?

1. Gravity
2. Regional Metabolic Status

23

When the V/Q ratio is 0, what does this mean?

There is no VENTILATION! Does not matter if there is any perfusion!

24

Where in the body would you yield a V/Q of 0?

Mixed Venous Blood in the heart

25

Mixed Venous Blood usually has a PO2 of?

45 mm Hg

26

Mixed Venous Blood usually has a PCO2 of?

40 mm Hg

27

When the V/Q ratio is infinity, what does this mean?

There is no VENTILATION!

28

Where in the body would you yield a V/Q of infinity?

Inspired Air

29

Inspired Air usually has a PO2 of?

150 mm Hg

30

Inspired Air usually has a PCO2 of?

0 mm Hg