Hemodynamic Disorders Part 2 Flashcards

1
Q

99% of all infarcts result from…..

A

thrmbotic or embolic events

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2
Q

name organs that form red infarcts and why

A

intestines, lungs

organs with dual or intensive collateral circulation

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3
Q

what organs form pale (white) infarcts and why

A

have single arterial blood supply: heart, splee, kidney

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4
Q

an infarct in the BRAIN typically undergoes what kind of necrosis?

A

liquefactive – becomes a fluid filled cyst known as a CYSTIC INFARCT

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5
Q

name 3 organs with dual blood supply and what this means

A

lung
liver
hand/forearm

will form red infarct

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6
Q

name 3 organs with single blood supply and what this means

A

spleen
heart
kidney

will form pale (white) infarct

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7
Q

infarction caused by VENOUS thrombosis is likely to occur where and why?

A

testis and ovary bc they have single venous outflow channels

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8
Q

true or false

slowly developing occlusions are less likely to cause an infarction

A

true

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9
Q

a pale infarct affects what vessels?
what about red?

A

pale = arterial occlusion

red = venous occlusion

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10
Q

red infarct affects ___ organ

A

loose

pale affects solid

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11
Q

ovary and testis cause red or pale infarct

A

red

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12
Q

liver and intestine cause pale or red infarct

A

red

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13
Q

MOST infarctions show what kind of necrosis?

A

ischemic coagulative necrosis

exception is the brain where liquefactive necrosis is common

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14
Q

give 3 “solid” organs and thus pale infarcts

A

kidney
heart
spleen

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15
Q

causes of edema are:

______ hydrostatic pressure
______ colloidal (oncotic) pressure within blood vessels

A

increased hydrostatic pressure

reduced oncotic pressure within blood vessels

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16
Q

normal oncotic pressure

A

26mm Hg

17
Q

decreased ______ may cause edema

A

albumin

18
Q

where are heart failure cells seen

A

the lungs

19
Q

hyoercapnia is associated with……….

A

pulmonary edem

20
Q

generalized edema can cause ____ syndome

explain

A

nephrotic syndrome

serum protein (albumin) is lost in the urinr

21
Q

what does hypernatremic mean

A

dehydration resulting in increased sodium concentration in the EXTRACELLULAR FLUID

also called hypertonic dehydration

22
Q

how can over hydration be fatal

A

excess water can lead to water intoxication or low levels of sodium in the blood —– hyponatremia —- which is fatal

23
Q

what is cardiogenic shock caused by

A

severe depression of cardiac performance

24
Q

what is hypovolemic shock caused by

A

reduced blood volume

25
Q

neurogenic shock occurs when

A

after acute brain or spinal cord injury

causes generalized vasodilation

26
Q
A