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 SIADH  



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Author11 Posts
  #1

following are characteristics of inappropriate ADH secretion except
A. edema and hyperuricemia
B. excessive ADH secretion
C. normal burn and creatine
D. increased serum osmolality
E. hypotension and hypothermia




  #2

D.inc serum osmolality


  #3

yep D


  #4

yea, D was my ans also, but to my greatest surprise, the ans given was A. just can't understand how the reasoned it out :!:


  #5

Thats right. If edema is present, then by definition, you cannot have siADH. You MUST have increased total body Na+ to have edema.

siADH can be diagnosed if:
have less than dilute urine osmolality (>50 mOSM or >1.010 SG)
no edema
have no other renal or adrenal problems


  #6

Thats right bobby,

:arrow: there is normal TBNa+ there will be no edema on physical exam.(serum Na = TBNa+/TBW)

lab exam will show low serum BUN and uric acid.(which are lost in urine with Na+ from decreased proximal reabsorption)

Thus A is correct

You can refer goljan's path review for more info .


  #7

"asmi" wrote:
You can refer goljan's path review for more info .


He claims to have come up with this concept by the way (no edema unless increased TBNa+)...you never know with him


  #8

"Idiopathic" wrote:
"asmi" wrote:
You can refer goljan's path review for more info .


He claims to have come up with this concept by the way (no edema unless increased TBNa+)...you never know with him



so, do you think its wrong ..?


  #9

No, its definitely right...but did he really come up with it? Thats what I mean grin


  #10

"Idiopathic" wrote:
No, its definitely right...but did he really come up with it? Thats what I mean grin


:roll: :roll:


  #11

SIADH does not show oedema.....thats a fact...no need referring Goljan for that.SIADH will also have a fall in the osmolarity but hyperosmolar urine.I think it must be a misprint regarding the increased serum hyperosmolality...however if I'm made to choose I'll stick with A....emphasizing the point statement A makes!!





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