Pre-renal uremia vs. acute tubular necrosis Flashcards
1
Q
What is the main difference to remember between Pre-renal uremia vs. acute tubular necrosis?
A
In pre-renal uremia, the kidneys reabsorb the Na to try and hold on to water in an effort to dilute the urea in the blood.
2
Q
What are the measurements comparisons for Pre-renal uremia vs. acute tubular necrosis?
Urine sodium Fractional sodium excretion Fractional urea excretion Urine:plasma osmolality Urine:plasma urea Specific gravity Urine Response to fluid challenge
A
Pre-renal uremia - ATN
Urine sodium : 30 mmol/L
Fractional sodium excretion*: 1%
Fractional urea excretion: 35%
Urine:plasma osmolality: > 1.5 10:1 1020
