Get Connected in Nephrology

If the patient is not in steady state, the 24 hr urine is not valid. Your question about salt restriction is an excellent one. It's controversial (despite what nutritional authorities say) that salt restriction is important for blood pressure reduction. In fact, there is little prospective data that it matters for the general population. However, ...

Hr. Samih, By definition, in steady state, the kidney will excrete what one eats. Yes, the kidney reabsorbs 99% of filtered sodium but that amounts to roughly 20,000 mmol per day filtered and only, say 100-200 excreted (depending on what one eats). A 24 hour urine is the gold standard for measuring sodium intake. I think it is superior to an est...