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Kaplan Qbank USMLE



Author7 Posts
  #1

suppose there is a renal shut down, what will happen to

sodium conc .....

k conc

hco3- conc

non protein nitrogen conc




  #2

Na+ - increase

K+ - increase (lack of excretion + transcellular shift due to met.acidosis)

HCO3- decrease, no new generation of HCO3 by the collecting ducts

BUN - increase


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life is guud

  #3

na is 66% reabsorbed by the pct, then will na not be lost in the urine and the na conc decrease?

  #4

I thought Na+ would decrease...If the kidney is not working, there will be no reabsoprtion and it would be excreted...confused right??

  #5

I think it should be due to decreased GFR, or nothing filters, hence Increased Sodium retention, hence increase in Sodium!

  #6

it depends where the problem is, if the problem is in glomeruli and there is no filtration - you'll have Na increase, and if the problem is in tubuls - then you can't reapsorb filtered Na so Na will be decreased

  #7

but q bank never said in the question, it just said a man with chronic renal failure, comes to the er, and metabolites not ok, what will be the right choice, and all these were given







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