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Old 07-04-2013
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Kidney Post renal azotemia?

Hey
I studied patho from pathoma and it stated clearly that in early stage of post renal azotemia we will have the same findings of pre renal , later on the kidney will get damaged by the back pressure and the findings will be like in intrinsic azotemia
now I am revising patho from FA ( which I found it has more info than pathoma in some aspects , I really thought that reading pathoma will make no use of FA from patho but I discovered that they have more info than pathoma ! ) , any way in FA there is a table comparing pre renal , intrinsic and post renal , the findings in post renal urine osmolality < 350, urine Na > 40 , fractional Na > 2 % so when I read these I said in my mind that it looks that they are refering to late stage since these findings are similar to intrinsic azotemia, but when I looked at the Serum BUN/Cr here comes the confusion it is written > 15 which is found in pre renal ?? so what the hell is going on , who is wrong FA or pathoma ? can someone explain this
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Old 07-04-2013
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I said maybe I can understand it from goljan so I looked it up and I found that it is written that glomuronephritis findings are the same as pre-renal azotemia !!!!!!!!!!!!!!!!!! ? now I am really super confused
please also explain this to me is this right info or is goljan mistaken, I always knew that Glomuronephritis is a type of intrinsic and the findings will be same as intrinsic azotemia !
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Old 07-05-2013
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hey
the postrenal azoemia in firsaid should be corrected since he value of fena and urine sodium indicate tubular damage so it is late postrenal azotemia and the bun/creatinin will be less than 15
and for glomerulonephris and atn both cause intrisic but in glomerulonephritis the tubule are intact so will have same value as prerenal except presence of rbc cast

Last edited by cage92; 07-05-2013 at 12:38 AM. Reason: error in keyboard:P:D
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Old 07-05-2013
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Quote:
Originally Posted by cage92 View Post
hey
the postrenal azoemia in firsaid should be corrected since he value of fena and urine sodium indicate tubular damage so it is late postrenal azotemia and the bun/creatinin will be less than 15
and for glomerulonephris and atn both cause intrisic but in glomerulonephritis the tubule are intact so will have same value as prerenal except presence of rbc cast
I wanted to correct it by my self but I checked the errata but didnt find any correction so I though I am missing something , thanks alot
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