Homework Answers
Fractional Excretion of Sodium (FENA) = Urine Na * Serum cr / Serum Na*Urine Cr * 100
= 30 * 1 / 138*24 * 100
=30 / 3312 * 100
= 0.009 *100
=0.9
=1 %( rounded to nearest tenth)
So, FENA is 1%
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