During the diuresis stage, which is true?

During the diuresis stage, which is true?

• A. GFR remains severely low
• B. BUN and creatinine rapidly normalize
• C. Urine specific gravity remains low
• D. Fluid volume continues to overload

Answer: (C)

In this recovery phase, the kidneys start producing a large amount of urine as tubular function begins to return, but their ability to concentrate urine is still impaired. Because the concentrating mechanism isn’t fully back online, the urine stays dilute, so the urine specific gravity remains low even though volume output is high. BUN and creatinine tend to fall gradually rather than rapidly normalize, and while GFR is improving, it isn’t back to normal yet. Fluid overload tends to ease as more urine is produced, but the big hallmark of this stage is the dilute urine driving a low specific gravity.

In this recovery phase, the kidneys start producing a large amount of urine as tubular function begins to return, but their ability to concentrate urine is still impaired. Because the concentrating mechanism isn’t fully back online, the urine stays dilute, so the urine specific gravity remains low even though volume output is high. BUN and creatinine tend to fall gradually rather than rapidly normalize, and while GFR is improving, it isn’t back to normal yet. Fluid overload tends to ease as more urine is produced, but the big hallmark of this stage is the dilute urine driving a low specific gravity.