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Thanks, I was wondering why EPO was not correct. So EPO synthesis would be stimulated in case of blood loss? its just wrong becase they ask specifically what is going to be produced in the bone marrow?
@lilyo yes because it's specifically asking what the bone marrow is synthesizing. EPO would also be upregulated but this happens in the kidneys.
flocculonodular is medial (central). but yes it'll have nystagmus and truncal ataxia
Doesn’t supine position compress IVC leading to decreased venous return? (This is the pathophys of supine hypotension syndrome.) There was a UWorld questions about this ...
@medstruggle *Supine position* decreases blood pooling in the legs and decreases the effect of gravity. *Supine hypotension syndrome*, on the other hand, seems specific to a pregnant female, since the gravid uterus will compress the IVC; in an average pt, there wouldn’t be the same postural compression.
this was the exact same reasoning I used, but I thought the RAAS would inactivate which would lead to less aldosterone and less sodium retention
You gotta be preggers to compress your IVC
Could you also think of it in a purely "rest/digest" vs "fight/fright/flight" response, i.e. you're PNS is active, so your HR and subsequently your CO is less? But the explanation given above does make sense. Also because I think just saying someone is one bed rest leaves a lot up for interpretation, maybe not with this patient because his pelvis is broken, but lots of people on bed rest aren't lying flat.... ?
wouldnt low aldosterone cause low plasma sodium? choice B
could it be that, while low aldosterone levels decrease plasma sodium levels- there is also decrease in blood volume(plasma),so there wont be a decrease in the "concentration" of sodium
FA 2019 pg 306 on Lt heart failure induced orthopnea - Shortness of breath when supine: increased venous return from redistribution of blood
if there was no HF, it would lead to increased CO --> decreased aldosterone
When the person is lying down (supine position), gravitational forces are similar on the thorax, abdomen and legs because these compartments lie in the same horizontal plane. In this position, venous blood volumes and pressures are distributed evenly throughout the body.