Acute Kidney Injury - Specific Gravity

The specific gravity of water is 1.0, and so when we're looking at the urine-specific gravity, we are looking at it kind of in that context. If on my differential I think that they are hypovolemic or have what we would call quote prerenal AKI, a very high specific gravity is going to be very much in support of that diagnosis. And another way to think about this is a quicker way to assess the urine osmolality as the two generally correlate pretty well. But with respect to AKI, the urine pH is not really that helpful. But if we have a patient with a renal tubular acidosis or some sort of acid-