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CRRAB II--Wk 5 > Diffusion > Flashcards

Diffusion Flashcards

(11 cards)

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1
Q

Gases diffuse down what gradient

A

pressure

(not concentration)

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2
Q

2 types of processes limiting movement of gases

A

diffusion-limited

perfusion-limited

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3
Q

Diffusion-limited processes

A

unequal solubility in blood and blood-gas barrier

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4
Q

Perfusion limited processes

A

equal solubility in blood and blood-gas barrier

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5
Q

Restraint on diffusion-limited processes

A

diffusion across blood-alveolar membrane

blood-gas barrier

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6
Q

Example of diffusion-limited gas

A

CO

carbon monoxide

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7
Q

Perfusion-limited processes

limitation

A

blood flow through pulmonary capillaries

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8
Q

Examples of perfusion-limited gases

A

O2

N2O

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9
Q

CO used clinically

A

to determine if process is diffusion-limited

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10
Q

Condition in which CO pulmonary testing may be useful

A

interstitial pneumonia

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11
Q

Tx of CO poisoning

A

hyperbaric O2 chamber

want to dissolve O2 in blood instead of use Hb to carry it

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CRRAB II--Wk 5 (9 decks)

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