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free120/Block 2/Question#31 (reveal difficulty score)
A 23-year-old woman is brought to the medical ...
Orthostatic hypotension πŸ” / πŸ“Ί / 🌳
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 +7 
submitted by thisquestionsucks(9),
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step7777  Not to mention orthostatics in the hospital imply a sudden change based on positioning. This patient didn't go from lying down to standing suddenly (just bitter bc I also chose autonomic dysfunction. +2  
jbrito718  Hypokalemia would present with muscle weakness. Autonomic dysfxn is a decreased baroreceptor sensitivity so we would not see appropriate correction with elevated feet (over correction/hypertension would be seen). Isotonic saline would not correct hyponatremia, it would probably make it worse (dilution effect). MI would have different symptoms. +1  
faili7777  @jbrito718 I think you misunderstood something. People who do marathon are really susceptible to hyponatremia. And the treatment for hyponatremia is literally '0.9% saline' because it is isotonic. So it's used to treat 'hyponatremia' +1  



 +4 
submitted by βˆ—lpp06(38),
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 +3 
submitted by βˆ—mamast16(4),
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hoTug senitoqu tbu .09% nasile si instooic adn yllrnamo dseu rfo uolmve noerpetil si how I got it




 +2 
submitted by βˆ—b1ackcoffee(91),
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nufsdcoe why isht si ton onmutcioa oftcuynsnid ro yiomarehtapn eud ot wtgesian dan hyw is tish ohsttitcaro ?syitpnnehoo

mdmofongo  This one is tricky and come downs to choosing the β€œbest” option. I can see why you were confused. However do note that in an autonomic dysfunction you will never present tachycardia as this patient does. I guess the key here is seeing how her BP normalizes once she is laying down? Sorry, this one is a kinda unusual presentation of Orthostatic hypo. +  
mamed  Not sure if this is correct thinking but how I got this right was: 1. She is hypovolemic 2. Likely retaining salt so water follows (ADH or just renal dynamics in general). This is how I ruled our hypokalemia and hyponatremia 3. If she is hyponatremic b/c sweating then why wouldn't she also be hypokalemic? so both have to wrong because both can't be right 4. Volume depletion ==> orthostatic hypotension +2  
blah  I thought that orthostatic hypotension was more of a chronic condition, but I fooled myself into believing that. +  
cbreland  I completely read over the initial BP measurement and picked the wrong answer (mostly b/c of that). Test in 4 days lets get it! +4  



 +0 
submitted by βˆ—cassdawg(1702),

This is a tricky question. The another big point of confusion here is that sweat actually causes a hyperosmotic volume contraction. This occurs because the content of sweat is composed primarily of water more so than salt. With that said, its unlikely that this patient will be hyponatremic. If anything she will be hypernatremic.

-Billy Rubin




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