Question

Elevated levels of urea that are seen with obstruction to urinary flow by stones or tumors have to do with which of the following:

a) Pre-renal
b) Renal
c) Post-renal
d) None of the above

Answer 1

The elevated levels of urea due to urinary obstruction by stones or tumors are related to post-renal factors, caused by obstructions in the urinary tract.

Step-by-step explanation:

The elevated levels of urea seen with obstruction to urinary flow caused by stones or tumors are associated with post-renal factors. Post-renal uremia occurs due to obstruction in the urinary tract, which can arise from conditions such as urolithiasis (kidney stones)

Unlike pre-renal uremia, which is due to conditions affecting the blood flow to the kidneys, and renal uremia, which is due to kidney disorders, post-renal uremia originates from obstructions occurring after the kidneys, such as in the ureters, bladder, or urethra.