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Flashcards in V/Q mismatched Deck (9)
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1

V

- ventilation

2

Q

- volume/ perfusion

3

ventilatory flow air we inhaled goes to

- mostly reached the base
- BASE due to gravity

4

normal values

- pH= 7.4
- PO2= 100
- PCO2= 40

5

BASE V/Q matching
is for CARBON DIOXIDE
is for SHUNT LIKE SITUATION e.g. ATELECTASIS

- 100/150= >ventilation
- more blood is going to the lung than air coming to the lung
- deoxygenated and venous blood rich CO2
- increase CO2 due to excess in perfusion of deoxygenated blood
- decrease PO2
- decrease pH due to increase PCO2

6

APEX V/Q matching
is for OXYGEN
is for PHYSIOLOGICAL DEAD SPACE LIKE SITUATION

- ventilation(V) >> perfusion(Q)
- 75/50= >1
- increase PO2 (PTB)
- decrease PCO2
- increase pH

7

CASE: V/Q 1 apex
patient A .49 apex
patient B . 41 base
which of the ff has higher PO2
which of the ff has the higher PCO2
which of the ff has the higher pH

base is to CARBON DIOXIDE
apex is to OXYGEN

- patient A
- patient B
- patient A

8

PEANUT INHALATION affecting the BASE

- is affecting/obstructing ventilation
- ratio will decrease towards the base

9

AIR NOT USED

- dead space
- conducting zone