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Medical Forum / Diseases and Disorders / Asthma / April 2007Question for doc.
I followed your advice and visited the website that you referred me to. Urine sodium 20 (spot check--not a 24 hour urine test) urine creatinine (24 hour) 2.24 plasma sodium 140 plasma creatinine 1.0 FENa was equal to 6.4 (as per the calculator). Possible problem There urine sodium was a spot check whereas the urine creatinine was a 24 hour urine test--is this a problem? The words below the results state: "FENa is greater than 1 percent and usually greater than 3 percent with acute tubular necrosis and severe obstruction of the urinary drainage of both kidneys..." Since my FENa result was greater than 3 percent, could I have those kidney problems mentioned above? Jason > I followed your advice and visited the website that you referred me to. > [quoted text clipped - 4 lines] > > FENa was equal to 6.4 (as per the calculator). The problem is that the urine creatinine should be 'spot' as well and units of mg/dl. I suspect the 24 hr urine was total creatinine in the 24 hr specimen. The urine creatinine needs to be 'spot' at the same time of serum studies and urine sodium. Blackbag > Possible problem > There urine sodium was a spot check whereas the urine creatinine was a 24 [quoted text clipped - 10 lines] > > Jason > > I followed your advice and visited the website that you referred me to. > > [quoted text clipped - 11 lines] > > Blackbag ~~~~~~~~~~~~~~~~ Blackbag, thanks--your post was helpful. jason ~~~~~~~~~~~~~~~~ > I followed your advice and visited the website that you referred me to. > [quoted text clipped - 19 lines] > > Jason Update: I found a urine test that was done last year and it had a spot urine test for creatinine so I ran the new number thru the calculator. These are the new results: urine sodium 20 spot check urine creatinine 17.6 spot check plasma sodium 140 plasma creatinine 1.0 FENa was equal to 0.8 (as per the calculator). The words below the calculator state: FENa "is generally less than 1 percent in patients with acute glomerulonephritis, hepatonenal snydrome, and states of prerenal azotema such as congestive heart failure or dehydration. FENa may also be less than 1 per cent with acute partial urinary tract obstruction." Could I have any of those kidney problems? thanks, Jason ~~~~~~~~~~~~~ >> I followed your advice and visited the website that you referred me to. >> [quoted text clipped - 40 lines] > > Could I have any of those kidney problems? The blood and the urine need to be from the same time period. If you are <1% the most likely cuase is dehydration.  Signature00doc > >> I followed your advice and visited the website that you referred me to. > >> [quoted text clipped - 43 lines] > The blood and the urine need to be from the same time period. If you are <1% > the most likely cuase is dehydration. ~~~~~~~~~~~~ doc, thanks--that was also my guess. jason ~~~~~~~~~~~~~~~~~~~ > I followed your advice and visited the website that you referred me to. > [quoted text clipped - 8 lines] > There urine sodium was a spot check whereas the urine creatinine was a 24 > hour urine test--is this a problem? You should be using the concentration of urine creatinine. Ideally it should be a spot urine sample done at about the same time as the blood work. > The words below the results state: > [quoted text clipped - 4 lines] > Since my FENa result was greater than 3 percent, could I have those kidney > problems mentioned above? Probably not. The serum creatinine is normal. Why is he doing these tests anyway? Signature00doc > > I followed your advice and visited the website that you referred me to. > > [quoted text clipped - 26 lines] > > Why is he doing these tests anyway? ~~~~~~~~~~~~~~~~ doc, He is trying to figure out why I have edema problems. I am reading a book related to hypothyroidism and learned from that book that people that have untreated hypothyroidism have all sorts of problems related to water related weight gain. For several years, my doctor and myself incorrectly assumed that weak kidneys were the cause of my edema problems. As you know, water follows salt--so my doctor was trying to determine if I was having salt/potassium related problems. My doctor recently arranged for me to wear some sort of electronic device while I was sleeping to monitor my breathing problems. I now have sleep apnea problems. I have calcium deposits on my lungs. The specialist determined that I did not have asthma last year but my breathing problems are getting much worse. He is trying to figure out what is the cause of my symptoms. jason ~~~~~~~~~~~~~~~~~~~~~~~~ |
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