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bobby
Forum Guru Topics: 136 Posts: 569 |
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
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usmleasr
| Forum Guru Topics: 105 Posts: 970
D.inc serum osmolality
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asmi
| Forum Hero Topics: 1049 Posts: 4620
yep D
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bobby
| Forum Guru Topics: 136 Posts: 569
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 :!:
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Idiopathic
| Forum Guru Topics: 19 Posts: 639
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
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asmi
| Forum Hero Topics: 1049 Posts: 4620
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 .
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Idiopathic
| Forum Guru Topics: 19 Posts: 639
"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
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asmi
| Forum Hero Topics: 1049 Posts: 4620
"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 ..?
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Idiopathic
| Forum Guru Topics: 19 Posts: 639
No, its definitely right...but did he really come up with it? Thats what I mean 
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asmi
| Forum Hero Topics: 1049 Posts: 4620
"Idiopathic" wrote: No, its definitely right...but did he really come up with it? Thats what I mean :roll: :roll:
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Malaysian
| Forum Guru Topics: 28 Posts: 778
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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