Flashcards in 4.8 Homeostasis Deck (103)
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1
Edema
accumulation of fluid in interstitial space - several causes
2
Hydrothorax
collections of fluids - low protein (basically water) so not an infection
3
Ascites
peritonial cavity fluid acumulation - abdomen
4
Anasarca
whole body edema
5
Transudate
low protein fluid that leaks out (mostly water)
6
Exudate
high protein fluid leaking out
7
Effusion
collection of fluid in the cavity
8
Hyperemia
increased dialation of vessels, an active process caused by mediators
9
Congestion
blood can't get out of vessels and looks red, caused by blockage
10
Hemorrhage
beeding
11
Hematoma
collection of fluid in tissue
12
tissue hydrostatic pressure, oncotic pressure, and tissue compliance affct the
vessel and amout of resistance
13
Pc
capillary pressure
14
Pa
arterial end pressure
15
Pv
venous end pressure
16
Ra
arterial end resistance
17
Rv
venous end resistance
18
thigns that increase pressure at capilary level induce
lots of fluid leaving
19
what will change the rate of fluid leaving most drastically
venous block - increase in venous pressure will cause over a 5 forld increase in fluid leaving due to the increased hydrostatic pressure.
With hypertension you don_t see puffy faces, but with venous block you'll have inc fluid in tissues. bc Ra > Rv inc in Pa has less of an effect on Pc than inc in Pv
20
Pc formula
Pc = ((Rv/Ra)Pa + Pv) / (1 + (Rv/Ra) )
21
Tissue hydrostatic pressure (Pt) formula
Pt = Tf x Tc
22
Tf
tissue fluid
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Tc
tissue compliance
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Pt is usually near
0
25
Tc is usually
low
26
inc in Tf causes
inc in Pt
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inc in Pt
usually timints Tf
28
where is Tc very high and what is the effect?
lungs bc there is air surrounding capllaries so no back pressure,
so in congestive heart failure when there is an increase in pulmonary aretery pressure,
you'll see pulmonary edema
29
osmotic/oncotic pressure (Pcos)
capilary osmotic/oncotic pressure due to proteins
30
